101
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Zhou R, Wang P, Guo Y, Dai X, Xiao S, Fang Z, Speight R, Thompson EW, Cullen PJ, Ostrikov KK. Prussian blue analogue nanoenzymes mitigate oxidative stress and boost bio-fermentation. Nanoscale 2019; 11:19497-19505. [PMID: 31553036 DOI: 10.1039/c9nr04951g] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Oxidative stress in cells caused by the accumulation of reactive oxygen species (ROS) is a common cause of cell function degeneration, cell death and various diseases. Efficient, robust and inexpensive nanoparticles (nanoenzymes) capable of scavenging/detoxifying ROS even in harsh environments are attracting strong interest. Prussian blue analogues (PBAs), a prominent group of metalorganic nanoparticles (NPs) with the same cyanometalate structure as the traditional and commonly used Prussian blue (PB), have long been envisaged to mimic enzyme activities for ROS scavenging. However, their biological toxicity, especially potential effects on living beings during practical application, has not yet been fully investigated. Here we reveal the enzyme-like activity of FeCo-PBA NPs, and for the first time investigate the effects of FeCo-PBA on cell viability and growth. We elucidate the effect of the nanoenzyme on the ethanol-production efficacy of a typical model organism, the engineered industrial strain Saccharomyces cerevisiae. We further demonstrate that FeCo-PBA NPs have almost no cytotoxicity on the cells over a broad dosage range (0-100 μg mL-1), while clearly boosting the yeast fermentation efficiency by mitigating oxidative stress. Atmospheric pressure cold plasma (APCP) pretreatment is used as a multifunctional environmental stress produced by the plasma reactive species. While the plasma enhances the cellular uptake of NPs, FeCo-PBA NPs protect the cells from the oxidative stress induced by both the plasma and the fermentation processes. This synergistic effect leads to higher secondary metabolite yields and energy production. Collectively, this study confirms the positive effects of PBA nanoparticles in living cells through ROS scavenging, thus potentially opening new ways to control the cellular machinery in future nano-biotechnology and nano-biomedical applications.
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Affiliation(s)
- Renwu Zhou
- Institute of Health and Biomedical Innovation, School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, Brisbane QLD 4000, Australia. and Translational Research Institute, Brisbane, QLD 4102, Australia and School of Chemical and Biomolecular Engineering, The University of Sydney, NSW 2006, Australia
| | - Peiyu Wang
- Institute of Health and Biomedical Innovation, School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, Brisbane QLD 4000, Australia. and Translational Research Institute, Brisbane, QLD 4102, Australia
| | - Yanru Guo
- Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China
| | - Xiaofeng Dai
- Wuxi School of Medicine, Jiangnan University, 214122, China
| | - Shaoqing Xiao
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, Wuxi 214122, China
| | - Zhi Fang
- College of Electrical Engineering and Control Science, Nanjing Tech University, Nanjing 210009, China.
| | - Robert Speight
- Institute of Health and Biomedical Innovation, School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, Brisbane QLD 4000, Australia.
| | - Erik W Thompson
- Institute of Health and Biomedical Innovation, School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, Brisbane QLD 4000, Australia. and Translational Research Institute, Brisbane, QLD 4102, Australia
| | - Patrick J Cullen
- School of Chemical and Biomolecular Engineering, The University of Sydney, NSW 2006, Australia
| | - Kostya Ken Ostrikov
- Institute of Health and Biomedical Innovation, School of Chemistry, Physics and Mechanical Engineering, Science and Engineering Faculty, Queensland University of Technology, Brisbane QLD 4000, Australia. and Translational Research Institute, Brisbane, QLD 4102, Australia
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102
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Nan H, Zhou R, Gu X, Xiao S, Ken Ostrikov K. Recent advances in plasma modification of 2D transition metal dichalcogenides. Nanoscale 2019; 11:19202-19213. [PMID: 31436772 DOI: 10.1039/c9nr05522c] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Two-dimensional (2D) transition metal dichalcogenide (TMDC) materials have recently attracted great interest because of their tantalising prospects for a broad range of applications including electronics, optoelectronics, and energy storage. Unlike bulk materials, the device performance of atomically thin 2D materials is determined by the interface, thickness and defects. Plasma processing is very effective for diverse modifications of nanoscale 2D TMDC materials, owing to its uniquely controllable, effective processes and energy efficiency. Herein, we critically discuss selected recent advances in plasma modification of 2D TMDC materials and their optical and electronic (including optoelectronic) properties of relevance to applications in hydrogen production, gas sensing and energy storage devices. Challenges and future research opportunities in the relevant research field are presented. This review contributes to directing future advances of plasma processing of TMDC materials for targeted applications.
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Affiliation(s)
- Haiyan Nan
- Engineering Research Center of IoT Technology Applications (Ministry of CEducation), Department of Electronic Engineering, Jiangnan University, Wuxi 214122, China.
| | - Renwu Zhou
- Institute of Future Environments and School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia. and CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, P.O. Box 218, Lindfield, NSW 2070, Australia
| | - Xiaofeng Gu
- Engineering Research Center of IoT Technology Applications (Ministry of CEducation), Department of Electronic Engineering, Jiangnan University, Wuxi 214122, China.
| | - Shaoqing Xiao
- Engineering Research Center of IoT Technology Applications (Ministry of CEducation), Department of Electronic Engineering, Jiangnan University, Wuxi 214122, China.
| | - Kostya Ken Ostrikov
- Institute of Future Environments and School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia. and CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, P.O. Box 218, Lindfield, NSW 2070, Australia
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103
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Mo H, Zhang X, Liu Y, Kang P, Nan H, Gu X, Ostrikov KK, Xiao S. Two-Dimensional Alloying Molybdenum Tin Disulfide Monolayers with Fast Photoresponse. ACS Appl Mater Interfaces 2019; 11:39077-39087. [PMID: 31573789 DOI: 10.1021/acsami.9b13645] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Elemental alloying in monolayer, two-dimensional (2D) transition metal dichalcogenides (TMDs) promises unprecedented ability to modulate their electronic structure leading to unique optoelectronic properties. MoS2 monolayer based photodetectors typically exhibit a high photoresponsivity but suffer from a low response time. Here we develop a new approach for Sn alloying in MoS2 monolayers based on the synergy of the customized chemical vapor deposition (CVD) and the effects of common salt (NaCl) to produce high-quality and large-size Mo1-xSnxS2 (x < 0.5) alloy monolayers. The composition difference results in different growth behaviors; Mo dominated alloys (x < 0.5) exhibit uniform and large size (up to 100 μm) triangular monolayers, while Sn-dominated alloys (x > 0.5) present multilayer grains. The Mo1-xSnxS2 (x < 0.5) based photodetectors and phototransistors exhibit a maximum responsitivity of 12 mA/W and a minimum response time of 20 ms, which is faster than most reported MoS2-based photodetectors. This work offers new perspectives for precision 2D alloy engineering to improve the optoelectronic performance of TMD-based photodetectors.
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Affiliation(s)
| | | | - Yuan Liu
- Wuxi Branch of Jiangsu Province Special Equipment Safety Supervision and Inspection Institute , Wuxi 214174 , China
| | | | | | | | - Kostya Ken Ostrikov
- School of Chemistry, Physics and Mechanical Engineering and Institute for Future Environments , Queensland University of Technology , Brisbane , QLD 4000 , Australia
- CSIRO-QUT Joint Sustainable Processes and Devices Laboratory , P. O. Box 218, Lindfield , NSW 2070 , Australia
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104
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Li JG, Xie K, Sun H, Li Z, Ao X, Chen Z, Ostrikov KK, Wang C, Zhang W. Template-Directed Bifunctional Dodecahedral CoP/CN@MoS 2 Electrocatalyst for High Efficient Water Splitting. ACS Appl Mater Interfaces 2019; 11:36649-36657. [PMID: 31535845 DOI: 10.1021/acsami.9b11859] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Designing high efficient and noble metal-free bifunctional electrocatalysts for both hydrogen and oxygen generation is still critical and challenged. In this study, hierarchical dodecahedral-structured CoP/CN@MoS2 is prepared through a two-step calcination treatment and a solvothermal approach. The metal-organic framework of ZIF-67 is chosen to serve as the template and for providing Co sources, in which ZIF-67 is first transformed to Co nanoparticles embedded in nitrogen-doped carbon polyhedrons and then transformed to CoP/CN. MoS2 nanosheets are further grown on the surface of dodecahedral-structured CoP/CN with a solvothermal method. Benefiting from the synergistic coupling effect of CoP and MoS2 and the nitrogen-doped carbon matrix, advanced hydrogen evolution reaction (HER) both in acid and alkaline solution as well as splendid oxygen evolution reaction (OER) performance in alkaline aqueous were achieved. Moreover, the coupling effect of CoP/CN and MoS2 is disclosed theoretically by density functional theory calculations to validate the increased HER activity. The as-prepared hybrid CoP/CN@MoS2 not only exhibits decent HER activity in acidic (η10 = 144 mV) and alkaline solutions (η10 = 149 mV), but also exhibits splendid OER activity (η10 = 289 mV) in 1.0 M KOH. This work represents a solid step toward boosting the electrocatalytic kinetics of nonprecious catalysts.
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Affiliation(s)
- Jian-Gang Li
- School of Optical and Electronic Information , Huazhong University of Science and Technology , Wuhan 430074 , P.R. China
| | - Kefeng Xie
- School of Chemical and Biological Engineering , Lanzhou Jiaotong University , Lanzhou , Gansu 730070 , P.R. China
| | - Huachuan Sun
- School of Optical and Electronic Information , Huazhong University of Science and Technology , Wuhan 430074 , P.R. China
| | - Zhishan Li
- School of Optical and Electronic Information , Huazhong University of Science and Technology , Wuhan 430074 , P.R. China
| | - Xiang Ao
- School of Optical and Electronic Information , Huazhong University of Science and Technology , Wuhan 430074 , P.R. China
| | - Zhenhua Chen
- Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics , Chinese Academy of Sciences , Shanghai 201204 , P.R. China
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics and Mechanical Engineering , Queensland University of Technology , Brisbane , Queensland 4000 , Australia
| | - Chundong Wang
- School of Optical and Electronic Information , Huazhong University of Science and Technology , Wuhan 430074 , P.R. China
| | - Wenjun Zhang
- Center of Super-Diamond and Advanced Films (COSDAF) & Department of Materials Science and Engineering , City University of Hong Kong , 83 Tat Chee Avenue , Kowloon , Hong Kong SAR , P.R. China
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105
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Joseph J, Nerkar J, Tang C, Du A, O'Mullane AP, Ostrikov KK. Reversible Intercalation of Multivalent Al 3+ Ions into Potassium-Rich Cryptomelane Nanowires for Aqueous Rechargeable Al-Ion Batteries. ChemSusChem 2019; 12:3753-3760. [PMID: 31102343 DOI: 10.1002/cssc.201901182] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Indexed: 06/09/2023]
Abstract
The development of new battery technology that utilizes abundant electrode materials that are environmentally benign is an important area of research. To alleviate the reliance on Li-ion batteries new energy storage mechanisms are urgently needed. To address these issues, MnO2 nanowires were investigated as a possible electrode material for use in rechargeable Al ion batteries that can operate in aqueous conditions. The use of this type of material and an aqueous electrolyte ensures safe operation as well as easy recycling of spent batteries. A potassium-rich cryptomelane structure was presented, and a new mechanism of electrochemical energy storage was elucidated based on the intercalation and deintercalation of small-radius Al3+ ions interchanging with larger K+ ions in the cryptomelane MnO2 nanowires, which was supported by DFT calculations. This first-time use of a cryptomelane MnO2 cathode for an aqueous Al ion system yielded a discharge capacity of 109 mAh g-1 , which indicates the potential commercial viability of rechargeable aqueous Al-ion batteries.
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Affiliation(s)
- Jickson Joseph
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
- CSIRO-QUT Joint Sustainable Processes and Devices Laboratory Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW, 2070, Australia
- Institute of Future Environments, Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Jawahar Nerkar
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
- CSIRO-QUT Joint Sustainable Processes and Devices Laboratory Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW, 2070, Australia
- Institute of Future Environments, Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Cheng Tang
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Aijun Du
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Anthony P O'Mullane
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
- CSIRO-QUT Joint Sustainable Processes and Devices Laboratory Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW, 2070, Australia
- Institute of Future Environments, Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
- CSIRO-QUT Joint Sustainable Processes and Devices Laboratory Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW, 2070, Australia
- Institute of Future Environments, Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD, 4000, Australia
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106
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Chan JY, Ahmad Kayani AB, Md Ali MA, Kok CK, Ramdzan Buyong M, Hoe SLL, Marzuki M, Soo-Beng Khoo A, Sriram S, Ostrikov KK. Dielectrophoretic deformation of breast cancer cells for lab on a chip applications. Electrophoresis 2019; 40:2728-2735. [PMID: 31219180 DOI: 10.1002/elps.201800442] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 04/19/2019] [Accepted: 05/28/2019] [Indexed: 11/08/2022]
Abstract
This paper presents the development and experimental analysis of a curved microelectrode platform for the DEP deformation of breast cancer cells (MDA-MB-231). The platform is composed of arrays of curved DEP microelectrodes which are patterned onto a glass slide and samples containing MDA-MB-231 cells are pipetted onto the platform's surface. Finite element method is utilised to characterise the electric field gradient and DEP field. The performance of the system is assessed with MDA-MB-231 cells in a low conductivity 1% DMEM suspending medium. We applied sinusoidal wave AC potential at peak to peak voltages of 2, 5, and 10 Vpp at both 10 kHz and 50 MHz. We observed cell blebbing and cell shrinkage and analyzed the percentage of shrinkage of the cells. The experiments demonstrated higher percentage of cell shrinkage when cells are exposed to higher frequency and peak to peak voltage electric field.
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Affiliation(s)
- Jun Yuan Chan
- Center for Advanced Materials and Green Technology, Multimedia University, Melaka, Malaysia
| | - Aminuddin Bin Ahmad Kayani
- Center for Advanced Materials and Green Technology, Multimedia University, Melaka, Malaysia.,Functional Materials and Microsystems Research Group and the Micro Nano Research Facility, RMIT University, Melbourne, Australia
| | - Mohd Anuar Md Ali
- Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia
| | - Chee Kuang Kok
- Center for Advanced Materials and Green Technology, Multimedia University, Melaka, Malaysia
| | - Muhamad Ramdzan Buyong
- Institute of Microengineering and Nanoelectronics, Universiti Kebangsaan Malaysia, Bangi, Selangor, Malaysia
| | - Susan Ling Ling Hoe
- Molecular Pathology Unit, Cancer Research Centre, Institute for Medical Research, Kuala Lumpur, Malaysia
| | - Marini Marzuki
- Molecular Pathology Unit, Cancer Research Centre, Institute for Medical Research, Kuala Lumpur, Malaysia
| | - Alan Soo-Beng Khoo
- Molecular Pathology Unit, Cancer Research Centre, Institute for Medical Research, Kuala Lumpur, Malaysia.,Institute for Research, Development and Innovation, International Medical University, Kuala Lumpur, Malaysia.,Faculty of Engineering, Computing and Science, Swinburne University of Technology Sarawak Campus, Kuching, Sarawak, Malaysia
| | - Sharath Sriram
- Functional Materials and Microsystems Research Group and the Micro Nano Research Facility, RMIT University, Melbourne, Australia
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Australia.,CSIRO-QUT Sustainable Processes and Devices Laboratory, Lindfield, New South Wales, Australia
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107
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Zhou R, Zhou R, Wang P, Luan B, Zhang X, Fang Z, Xian Y, Lu X, Ostrikov KK, Bazaka K. Microplasma Bubbles: Reactive Vehicles for Biofilm Dispersal. ACS Appl Mater Interfaces 2019; 11:20660-20669. [PMID: 31067024 DOI: 10.1021/acsami.9b03961] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Interactions between effects generated by cold atmospheric-pressure plasmas and water have been widely investigated for water purification, chemical and nanomaterial synthesis, and, more recently, medicine and biotechnology. Reactive oxygen and nitrogen species (RONS) play critical roles in transferring the reactivity from gas plasmas to solutions to induce specific biochemical responses in living targets, e.g., pathogen inactivation and biofilm removal. While this approach works well in a single-organism system at a laboratory scale, integration of plasma-enabled biofilm removal into complex real-life systems, e.g., large aquaculture tanks, is far from trivial. This is because it is difficult to deliver sufficient concentrations of the right kind of species to biofilm-covered surfaces while carefully maintaining a suitable physiochemical environment that is healthy for its inhabitants, e.g., fish. In this work, we show that underwater microplasma bubbles (generated by a microplasma-bubble reactor that forms a dielectric barrier discharge at the gas-liquid interface with the applied voltage of 4.0 kV) act as transport vehicles to efficiently deliver reactive plasma species to the target biofilm sites on artificial and living surfaces while keeping healthy water conditions in a multispecies system. The as-generated air microplasma bubbles and plasma-activated water (PAW) both can effectively reduce the existing pathogenic biofilm load by ∼83 and 60%, respectively, after 15 min of discharge at 40 W and prevent any new biofilm from forming. The generation of underwater microplasma bubbles in a custom-made fish tank for less than a minute per day (20 s per time, twice daily) can introduce sufficient quantities of RONS into PAW to reduce the biofilm-infected area by ∼80-90% and improve the health status of Cichlasoma synspilum × Cichlasoma citrinellum blood parrot cichlid fish. Species generated include hydrogen peroxide, ozone, nitrite, nitrate, and nitric oxide. Using mimicked chemical solutions, we show that the plasma-induced nitric oxide acts as a critical bioactive species that triggers the release of cells from the biofilm and their inactivation.
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Affiliation(s)
| | | | | | - Bingyu Luan
- Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Institute of Electromagnetics and Acoustics, Department of Electronic Science, College of Electronic Science and Technology , Xiamen University , Xiamen 361005 , China
| | - Xianhui Zhang
- Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance, Institute of Electromagnetics and Acoustics, Department of Electronic Science, College of Electronic Science and Technology , Xiamen University , Xiamen 361005 , China
| | - Zhi Fang
- College of Electrical Engineering and Control Science , Nanjing Tech University , Nanjing 210009 , China
| | - Yubin Xian
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering , Huazhong University of Science and Technology , Wuhan 430074 , China
| | - Xinpei Lu
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering , Huazhong University of Science and Technology , Wuhan 430074 , China
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108
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Bo Z, Xu C, Yang H, Shi H, Yan J, Cen K, Ostrikov KK. Hierarchical, Vertically‐Oriented Carbon Nanowall Foam Supercapacitor Using Room Temperature Ionic Liquid Mixture for AC Line Filtering with Ultrahigh Energy Density. ChemElectroChem 2019. [DOI: 10.1002/celc.201900347] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Zheng Bo
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy EngineeringZhejiang University Hangzhou, Zhejiang Province 310027 China
| | - Chenxuan Xu
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy EngineeringZhejiang University Hangzhou, Zhejiang Province 310027 China
| | - Huachao Yang
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy EngineeringZhejiang University Hangzhou, Zhejiang Province 310027 China
| | - Hao Shi
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy EngineeringZhejiang University Hangzhou, Zhejiang Province 310027 China
| | - Jianhua Yan
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy EngineeringZhejiang University Hangzhou, Zhejiang Province 310027 China
| | - Kefa Cen
- State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, College of Energy EngineeringZhejiang University Hangzhou, Zhejiang Province 310027 China
| | - Kostya Ken Ostrikov
- Joint CSIRO-QUT Sustainable Processes and Devices Laboratory, P. O. Box 218 Lindfield NSW 2070 Australia
- School of Chemistry, Physics and Mechanical EngineeringQueensland University of Technology, Brisbane Queensland 4000 Australia
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109
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Si J, Zheng Q, Chen H, Lei C, Suo Y, Yang B, Zhang Z, Li Z, Lei L, Hou Y, Ostrikov KK. Scalable Production of Few-Layer Niobium Disulfide Nanosheets via Electrochemical Exfoliation for Energy-Efficient Hydrogen Evolution Reaction. ACS Appl Mater Interfaces 2019; 11:13205-13213. [PMID: 30882199 DOI: 10.1021/acsami.8b22052] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Two-dimensional (2D) niobium disulfide (NbS2) materials feature unique physical and chemical properties leading to highly promising energy conversion applications. Herein, we developed a robust synthesis technique consisting of electrochemical exfoliation under alternating currents and subsequent liquid-phase exfoliation to prepare highly uniform few-layer NbS2 nanosheets. The obtained few-layer NbS2 material has a 2D nanosheet structure with an ultrathin thickness of ∼3 nm and a lateral size of ∼2 μm. Benefiting from their unique 2D structure and highly exposed active sites, the few-layer NbS2 nanosheets drop-casted on carbon paper exhibited excellent catalytic activity for the hydrogen evolution reaction (HER) in acid with an overpotential of 90 mV at a current density of 10 mA cm-2 and a low Tafel slope of 83 mV dec-1, which are superior to those reported for other NbS2-based HER electrocatalysts. Furthermore, few-layer NbS2 nanosheets are effective as bifunctional electrocatalysts for hydrogen production by overall water splitting, where the urea and hydrazine oxidation reactions replace the oxygen evolution reaction.
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Affiliation(s)
- Jincheng Si
- Department of Energy and Environmental Systems Engineering , Zhejiang University of Science and Technology , Liuhe Road 318# , Hangzhou , Zhejiang Province 310023 , China
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Qiang Zheng
- Materials Science and Technology Division , Oak Ridge National Laboratory , Oak Ridge , Tennessee 37831 , United States
| | - Hanlin Chen
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Chaojun Lei
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Yange Suo
- Department of Energy and Environmental Systems Engineering , Zhejiang University of Science and Technology , Liuhe Road 318# , Hangzhou , Zhejiang Province 310023 , China
| | - Bin Yang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Zhiguo Zhang
- Department of Energy and Environmental Systems Engineering , Zhejiang University of Science and Technology , Liuhe Road 318# , Hangzhou , Zhejiang Province 310023 , China
| | - Zhongjian Li
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Lecheng Lei
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Yang Hou
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering , Zhejiang University , Hangzhou 310027 , China
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics, and Mechanical Engineering , Queensland University of Technology , Brisbane , QLD 4000 , Australia
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110
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Zou X, Xu M, Pan S, Gan L, Zhang S, Chen H, Liu D, Lu X, Ostrikov KK. Plasma Activated Oil: Fast Production, Reactivity, Stability, and Wound Healing Application. ACS Biomater Sci Eng 2019; 5:1611-1622. [PMID: 33405634 DOI: 10.1021/acsbiomaterials.9b00125] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The "third-generation" cooking oil based drug, named plasma activated oil (PAO), is produced in cheap olive oil by a single-step, room temperature, energy-efficient, and environment-friendly dry plasma-enabled process. The streamer-surface discharge generates abundant energetic species, atomic oxygen at the plasma-oil interface. The otherwise challenging dissociation of C═C double bonds by energetic species and oxidation by the plasma generated atomic oxygen is the key mechanism to produce the H2O2 active species and carboxylic acid in the PAO. It is shown that the peroxide value and acid value of PAO are 7.5 times and 57% higher than those of the traditional ozonated oil, respectively. Different from plasma activated water whose shelf life was less than 1 week, PAO could be stored at room temperature for at least 3 months, and a shelf life of up to 1 year is expected. We further reveal that the PAO can not only sterilize the wound, but also promote more release of growth factor such as VEGF and CD34; therefore, the wound healing of PAO is 28.5% faster than that of the control group.
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Affiliation(s)
- Xianyun Zou
- State Key Lab of Advanced Electromagnetic Engineering and Technology, School of Electronic and Electrical Engineering, Huazhong University of Science and Technology, WuHan, HuBei 430074, China.,IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Maoyuan Xu
- State Key Lab of Advanced Electromagnetic Engineering and Technology, School of Electronic and Electrical Engineering, Huazhong University of Science and Technology, WuHan, HuBei 430074, China.,IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Shuhui Pan
- State Key Lab of Advanced Electromagnetic Engineering and Technology, School of Electronic and Electrical Engineering, Huazhong University of Science and Technology, WuHan, HuBei 430074, China.,IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Lu Gan
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Song Zhang
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Hongxiang Chen
- Department of Dermatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Dawei Liu
- State Key Lab of Advanced Electromagnetic Engineering and Technology, School of Electronic and Electrical Engineering, Huazhong University of Science and Technology, WuHan, HuBei 430074, China.,IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Xinpei Lu
- State Key Lab of Advanced Electromagnetic Engineering and Technology, School of Electronic and Electrical Engineering, Huazhong University of Science and Technology, WuHan, HuBei 430074, China.,IFSA Collaborative Innovation Center, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Kostya Ken Ostrikov
- Institute for Future Environments and Institute for Health and Biomedical Innovation, School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland 4000, Australia.,CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, P.O. Box 218, Bradfield Road, Lindfield, New South Wales 2070, Australia
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111
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Prasad K, Zhou R, Zhou R, Schuessler D, Ostrikov KK, Bazaka K. Cosmetic reconstruction in breast cancer patients: Opportunities for nanocomposite materials. Acta Biomater 2019; 86:41-65. [PMID: 30576863 DOI: 10.1016/j.actbio.2018.12.024] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 12/08/2018] [Accepted: 12/17/2018] [Indexed: 12/23/2022]
Abstract
The most common malignancy in women, breast cancer remains a major medical challenge that affects the life of thousands of patients every year. With recognized benefits to body image and self-esteem, the use of synthetic mammary implants for elective cosmetic augmentation and post-mastectomy reconstruction continues to increase. Higher breast implant use leads to an increased occurrence of implant-related complications associated with implant leakage and rupture, capsular contracture, necrosis and infections, which include delayed healing, pain, poor aesthetic outcomes and the need for revision surgeries. Along with the health status of the implant recipient and the skill of the surgeon, the properties of the implant determine the likelihood of implant-related complications and, in doing so, specific patient outcomes. This paper will review the challenges associated with the use of silicone, saline and "gummy bear" implants in view of their application in patients recovering from breast cancer-related mastectomy, and investigate the opportunities presented by advanced functional nanomaterials in meeting these challenges and potentially opening new dimensions for breast reconstruction. STATEMENT OF SIGNIFICANCE: Breast cancer is a significant cause of morbidity and mortality in women worldwide, which is difficult to prevent or predict, and its treatment carries long-term physiological and psychological consequences. Post-mastectomy breast reconstruction addresses the cosmetic aspect of cancer treatment. Yet, drawbacks of current implants contribute to the development of implant-associated complications, which may lead to prolonged patient care, pain and loss of function. Nanomaterials can help resolve the intrinsic biomechanical mismatch between implant and tissues, enhance mechanical properties of soft implantable materials, and provide an alternative avenue for controlled drug delivery. Here, we explore advances in the use of functionalized nanomaterials to enhance the properties of breast implants, with representative examples that highlight the utility of nanomaterials in addressing key challenges associated with breast reconstruction.
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Affiliation(s)
- Karthika Prasad
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia; CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW 2070, Australia
| | - Renwu Zhou
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia; CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW 2070, Australia
| | - Rusen Zhou
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia; CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW 2070, Australia
| | - David Schuessler
- Product Development, Allergan, 2525 Dupont Drive, Irvine, CA 92612, United States
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia; CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW 2070, Australia
| | - Kateryna Bazaka
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia; CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, NSW 2070, Australia.
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112
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Zhang X, Nan H, Xiao S, Wan X, Gu X, Du A, Ni Z, Ostrikov KK. Transition metal dichalcogenides bilayer single crystals by reverse-flow chemical vapor epitaxy. Nat Commun 2019; 10:598. [PMID: 30723204 PMCID: PMC6363754 DOI: 10.1038/s41467-019-08468-8] [Citation(s) in RCA: 53] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Accepted: 01/13/2019] [Indexed: 11/09/2022] Open
Abstract
Epitaxial growth of atomically thin two-dimensional crystals such as transition metal dichalcogenides remains challenging, especially for producing large-size transition metal dichalcogenides bilayer crystals featuring high density of states, carrier mobility and stability at room temperature. Here we achieve in epitaxial growth of the second monolayer from the first monolayer by reverse-flow chemical vapor epitaxy and produce high-quality, large-size transition metal dichalcogenides bilayer crystals with high yield, control, and reliability. Customized temperature profiles and reverse gas flow help activate the first layer without introducing new nucleation centers leading to near-defect-free epitaxial growth of the second layer from the existing nucleation centers. A series of bilayer crystals including MoS2 and WS2, ternary Mo1−xWxS2 and quaternary Mo1−xWxS2(1−y)Se2y are synthesized with variable structural configurations and tunable electronic and optical properties. The robust, potentially universal approach for the synthesis of large-size transition metal dichalcogenides bilayer single crystals is highly-promising for fundamental studies and technological applications. Epitaxial growth of the two-dimensionally thin material flakes with effective layer number and shape calls for precise control over temperature and carrier gas. Here, authors report controlled epitaxial growth of the second layer vertically for MoS2, WS2, MoWS and MoWSSe compounds by reverse hydrogen gas flow chemical vapor epitaxy.
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Affiliation(s)
- Xiumei Zhang
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, 214122, Wuxi, China.,School of Science, Jiangnan University, 214122, Wuxi, China
| | - Haiyan Nan
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, 214122, Wuxi, China
| | - Shaoqing Xiao
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, 214122, Wuxi, China.
| | - Xi Wan
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, 214122, Wuxi, China
| | - Xiaofeng Gu
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, 214122, Wuxi, China.
| | - Aijun Du
- Institute for Future Environments and School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Zhenhua Ni
- Department of Physics and Key Laboratory of MEMS of the Ministry of Education, Southeast University, 211189, Nanjing, China
| | - Kostya Ken Ostrikov
- Institute for Future Environments and School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia.,CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organization, P.O. Box 218, Lindfield, NSW, 2070, Australia
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113
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Roknuzzaman M, Zhang C, Ostrikov KK, Du A, Wang H, Wang L, Tesfamichael T. Electronic and optical properties of lead-free hybrid double perovskites for photovoltaic and optoelectronic applications. Sci Rep 2019; 9:718. [PMID: 30679678 PMCID: PMC6345881 DOI: 10.1038/s41598-018-37132-2] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2018] [Accepted: 11/20/2018] [Indexed: 01/07/2023] Open
Abstract
Developing of lead-free double perovskites have drawn significant interest for photovoltaics and optoelectronics as the materials have the potential to avoid toxicity and instability issues associated with lead-based organometallic perovskites. In this study, we report the optoelectronic properties of a new group of non-toxic lead-free organic-inorganic halide double perovskites composed of caesium (Cs), methylammonium (MA) or formamidinium (FA) with bismuth (Bi) and metal copper (Cu). We perform density functional theory investigations to calculate the structural, electronic and optical properties of 18 Pb-free compounds, ABiCuX6 [A = Cs2, (MA)2, (FA)2, CsMA, CsFA, MAFA; X = I, Br, Cl] to predict their suitability in photovoltaic and optoelectronic applications. We found that the considered compounds are semiconductors with a tunable band gap characteristics that are suitable for some devices like light emitting diodes. In addition to this, the high dielectric constant, high absorption, high optical conductivity and low reflectivity suggest that the materials have the potential in a wide range of optoelectronic applications including solar cells. Furthermore, we predict that the organic-inorganic hybrid double perovskite (FA)2BiCuI6 is the best candidate in photovoltaic and optoelectronic applications as the material has superior optical and electronic properties.
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Affiliation(s)
- Md Roknuzzaman
- School of Chemistry, Physics and Mechanical Engineering and Institute of Future Environments, Queensland University of Technology (QUT), Brisbane, QLD, 4000, Australia
| | - Chunmei Zhang
- School of Chemistry, Physics and Mechanical Engineering and Institute of Future Environments, Queensland University of Technology (QUT), Brisbane, QLD, 4000, Australia
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics and Mechanical Engineering and Institute of Future Environments, Queensland University of Technology (QUT), Brisbane, QLD, 4000, Australia
| | - Aijun Du
- School of Chemistry, Physics and Mechanical Engineering and Institute of Future Environments, Queensland University of Technology (QUT), Brisbane, QLD, 4000, Australia
| | - Hongxia Wang
- School of Chemistry, Physics and Mechanical Engineering and Institute of Future Environments, Queensland University of Technology (QUT), Brisbane, QLD, 4000, Australia
| | - Lianzhou Wang
- School of Chemical Engineering and Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Tuquabo Tesfamichael
- School of Chemistry, Physics and Mechanical Engineering and Institute of Future Environments, Queensland University of Technology (QUT), Brisbane, QLD, 4000, Australia.
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114
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Zhang X, Xiao S, Nan H, Mo H, Wan X, Gu X, Ostrikov KK. Controllable one-step growth of bilayer MoS 2-WS 2/WS 2 heterostructures by chemical vapor deposition. Nanotechnology 2018; 29:455707. [PMID: 30160236 DOI: 10.1088/1361-6528/aaddc5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Heterostructures of two-dimensional (2D) transition metal dichalcogenides (TMDs) offer attractive prospects for practical applications by combining unique physical properties that are distinct from those of traditional structures. In this paper, we demonstrate a three-stage chemical vapor deposition method for the growth of bilayer MoS2-WS2/WS2 heterostructures with the bottom layers being the lateral MoS2-center/WS2-edge monolayer heterostructures and the top layers being the WS2 monolayers. The alternative growth of lateral and vertical heterostructures can be realized by adjusting both the temperature and the carrier gas flow direction. The combined effect of both reverse gas flow and higher growing temperature can promote the epitaxial growth of second layer on the activated nucleation centers of the first monolayer heterostructures. By using customized temperature profiles, single heterostructures including monolayer lateral MoS2-WS2 heterostructures and bilayer lateral WS2(2L)-MoS2(2L) heterostructures could also be obtained. Atomic force microscopy, photoluminescence and Raman mapping studies clearly reveal that these different heterostructure samples are highly uniform. These results thus provide a promising and efficient method for the synthesis of complex heterostructures based on different TMDs materials, which would greatly expand the heterostructure family and broaden their applications.
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Affiliation(s)
- Xiumei Zhang
- Engineering Research Center of IoT Technology Applications (Ministry of Education), Department of Electronic Engineering, Jiangnan University, Wuxi 214122, People's Republic of China. School of Science, Jiangnan University, Wuxi 214122, People's Republic of China
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115
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Recek N, Zhou R, Zhou R, Te'o VSJ, Speight RE, Mozetič M, Vesel A, Cvelbar U, Bazaka K, Ostrikov KK. Improved fermentation efficiency of S. cerevisiae by changing glycolytic metabolic pathways with plasma agitation. Sci Rep 2018; 8:8252. [PMID: 29844402 PMCID: PMC5974074 DOI: 10.1038/s41598-018-26227-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 04/18/2018] [Indexed: 12/14/2022] Open
Abstract
Production of ethanol by the yeast Saccharomyces cerevisiae is a process of global importance. In these processes, productivities and yields are pushed to their maximum possible values leading to cellular stress. Transient and lasting enhancements in tolerance and performance have been obtained by genetic engineering, forced evolution, and exposure to moderate levels of chemical and/or physical stimuli, yet the drawbacks of these methods include cost, and multi-step, complex and lengthy treatment protocols. Here, plasma agitation is shown to rapidly induce desirable phenotypic changes in S. cerevisiae after a single treatment, resulting in improved conversion of glucose to ethanol. With a complex environment rich in energetic electrons, highly-reactive chemical species, photons, and gas flow effects, plasma treatment simultaneously mimics exposure to multiple environmental stressors. A single treatment of up to 10 minutes performed using an atmospheric pressure plasma jet was sufficient to induce changes in cell membrane structure, and increased hexokinase 2 activity and secondary metabolite production. These results suggest that plasma treatment is a promising strategy that can contribute to improving metabolic activity in industrial microbial strains, and thus the practicality and economics of industrial fermentations.
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Affiliation(s)
- Nina Recek
- Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD 4000, Australia.,Department of Surface Engineering and Optoelectronics, Jožef Stefan Institute, Ljubljana, SI-1000, Slovenia
| | - Renwu Zhou
- Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Rusen Zhou
- Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | | | - Robert E Speight
- Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Miran Mozetič
- Department of Surface Engineering and Optoelectronics, Jožef Stefan Institute, Ljubljana, SI-1000, Slovenia
| | - Alenka Vesel
- Department of Surface Engineering and Optoelectronics, Jožef Stefan Institute, Ljubljana, SI-1000, Slovenia
| | - Uros Cvelbar
- Department of Surface Engineering and Optoelectronics, Jožef Stefan Institute, Ljubljana, SI-1000, Slovenia
| | - Kateryna Bazaka
- Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD 4000, Australia. .,CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P. O. Box 218, Lindfield, NSW 2070, Australia.
| | - Kostya Ken Ostrikov
- Science and Engineering Faculty, Queensland University of Technology, Brisbane, QLD 4000, Australia. .,CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P. O. Box 218, Lindfield, NSW 2070, Australia.
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116
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Abstract
Exposed to ionizing radiation, nanomaterials often undergo unusual transformations compared to their bulk form. However, atomic-level mechanisms of such transformations are largely unknown. This work visualizes and quantifies nanopore shrinkage in nanoporous alumina subjected to low-energy ion beams in a helium ion microscope. Mass transport in porous alumina is thus simultaneously induced and imaged with nanoscale precision, thereby relating nanoscale interactions to mesoscopic deformations. The interplay between chemical bonds, disorders, and ionization-induced transformations is analyzed. It is found that irradiation-induced diffusion is responsible for mass transport and that the ionization affects mobility of diffusive entities. The extraordinary room temperature superplasticity of the normally brittle alumina is discovered. These findings enable the effective manipulation of chemical bonds and structural order by nanoscale ion-matter interactions to produce mesoscopic structures with nanometer precision, such as ultra-high density arrays of sub-10-nm pores with or without the accompanying controlled plastic deformations. When nanomaterials are exposed to ionizing radiation, they often sustain mesoscopic changes not seen in their bulk form. Here, the authors use a helium ion microscope to induce and examine transformations in nanoporous alumina, drawing connections between atomic structure and nano- and microscale behavior in materials under irradiation.
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Affiliation(s)
- Morteza Aramesh
- School of Chemistry, Physics and Mechanical Engineering and Institute for Future Environments, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia. .,CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Common wealth Scientific and Industrial Research Organisation, Lindfield, NSW 2070, Australia. .,Laboratory of Biosensors and Bioelectronics, Institute for Biomedical Engineering, ETH Zürich, 8092, Zürich, Switzerland.
| | - Yashar Mayamei
- Department of Nano Science, University of Science and Technology, Daejeon, 34113, Republic of Korea
| | - Annalena Wolff
- Central Analytical Research Facility, Institute for Future Environments, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics and Mechanical Engineering and Institute for Future Environments, Queensland University of Technology (QUT), Brisbane, QLD 4000, Australia.,CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Common wealth Scientific and Industrial Research Organisation, Lindfield, NSW 2070, Australia
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117
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Seo DH, Pineda S, Woo YC, Xie M, Murdock AT, Ang EYM, Jiao Y, Park MJ, Lim SI, Lawn M, Borghi FF, Han ZJ, Gray S, Millar G, Du A, Shon HK, Ng TY, Ostrikov KK. Anti-fouling graphene-based membranes for effective water desalination. Nat Commun 2018; 9:683. [PMID: 29445161 PMCID: PMC5813009 DOI: 10.1038/s41467-018-02871-3] [Citation(s) in RCA: 92] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Accepted: 01/05/2018] [Indexed: 11/11/2022] Open
Abstract
The inability of membranes to handle a wide spectrum of pollutants is an important unsolved problem for water treatment. Here we demonstrate water desalination via a membrane distillation process using a graphene membrane where water permeation is enabled by nanochannels of multilayer, mismatched, partially overlapping graphene grains. Graphene films derived from renewable oil exhibit significantly superior retention of water vapour flux and salt rejection rates, and a superior antifouling capability under a mixture of saline water containing contaminants such as oils and surfactants, compared to commercial distillation membranes. Moreover, real-world applicability of our membrane is demonstrated by processing sea water from Sydney Harbour over 72 h with macroscale membrane size of 4 cm2, processing ~0.5 L per day. Numerical simulations show that the channels between the mismatched grains serve as an effective water permeation route. Our research will pave the way for large-scale graphene-based antifouling membranes for diverse water treatment applications. Intrinsic limitations of nanoporous graphene limit its applications in water treatment. Here the authors produce post-treatment-free, low-cost graphene-based membranes from renewable biomass and demonstrate their high water permeance and antifouling properties using real seawater.
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Affiliation(s)
- Dong Han Seo
- CSIRO Manufacturing, 36 Bradfield Road, Lindfield, NSW, 2070, Australia.
| | - Shafique Pineda
- CSIRO Manufacturing, 36 Bradfield Road, Lindfield, NSW, 2070, Australia.,School of Physics, University of Sydney, Sydney, NSW, 2006, Australia
| | - Yun Chul Woo
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, PO Box 123, 15 Broadway, Sydney, NSW, 2007, Australia
| | - Ming Xie
- Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, Werribee, VIC, 3030, Australia
| | - Adrian T Murdock
- CSIRO Manufacturing, 36 Bradfield Road, Lindfield, NSW, 2070, Australia
| | - Elisa Y M Ang
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Yalong Jiao
- Institute for Future Environments and Institute for Health and Biomedical Innovation, School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Myoung Jun Park
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, PO Box 123, 15 Broadway, Sydney, NSW, 2007, Australia
| | - Sung Il Lim
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, PO Box 123, 15 Broadway, Sydney, NSW, 2007, Australia
| | - Malcolm Lawn
- National Measurement Institute, Nanometrology, 36 Bradfield Road, Lindfield, NSW, 2070, Australia
| | - Fabricio Frizera Borghi
- CSIRO Manufacturing, 36 Bradfield Road, Lindfield, NSW, 2070, Australia.,School of Physics, University of Sydney, Sydney, NSW, 2006, Australia
| | - Zhao Jun Han
- CSIRO Manufacturing, 36 Bradfield Road, Lindfield, NSW, 2070, Australia
| | - Stephen Gray
- Institute for Sustainability and Innovation, College of Engineering and Science, Victoria University, Werribee, VIC, 3030, Australia
| | - Graeme Millar
- Institute for Future Environments and Institute for Health and Biomedical Innovation, School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Aijun Du
- Institute for Future Environments and Institute for Health and Biomedical Innovation, School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Ho Kyong Shon
- Centre for Technology in Water and Wastewater, School of Civil and Environmental Engineering, University of Technology Sydney, PO Box 123, 15 Broadway, Sydney, NSW, 2007, Australia
| | - Teng Yong Ng
- School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | - Kostya Ken Ostrikov
- CSIRO Manufacturing, 36 Bradfield Road, Lindfield, NSW, 2070, Australia. .,School of Physics, University of Sydney, Sydney, NSW, 2006, Australia. .,Institute for Future Environments and Institute for Health and Biomedical Innovation, School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia.
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118
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Odedairo T, Yan X, Yao X, Ostrikov KK, Zhu Z. Hexagonal Sphericon Hematite with High Performance for Water Oxidation. Adv Mater 2017; 29:1703792. [PMID: 29052923 DOI: 10.1002/adma.201703792] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2017] [Revised: 08/25/2017] [Indexed: 06/07/2023]
Abstract
A cost-effective hexagonal sphericon hematite with predominant (110) facets for the oxygen evolution reaction (OER) is demonstrated. Sequential incorporation of near-atomic uniformly distributed Ce species and Ni nanoparticles into selected sites of the hematite induces a complex synergistic integration phenomenon that enhances the overall catalytic OER performance. This cheap hexagonal sphericon hematite (Fe ≈ 98%) only needs a small overpotential (η) of 0.34 V to reach 10 mA cm-2 , superior to commercial IrO2 and more expensive Co-, Ni-, and Li-based electrocatalysts.
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Affiliation(s)
- Taiwo Odedairo
- School of Chemical Engineering, The University of Queensland, St Lucia, QLD, 4072, Australia
| | - Xuecheng Yan
- School of Natural Sciences and Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, QLD, 4111, Australia
| | - Xiangdong Yao
- School of Natural Sciences and Queensland Micro- and Nanotechnology Centre, Griffith University, Nathan Campus, QLD, 4111, Australia
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Zhonghua Zhu
- School of Chemical Engineering, The University of Queensland, St Lucia, QLD, 4072, Australia
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119
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Roknuzzaman M, Ostrikov KK, Wang H, Du A, Tesfamichael T. Towards lead-free perovskite photovoltaics and optoelectronics by ab-initio simulations. Sci Rep 2017; 7:14025. [PMID: 29070848 PMCID: PMC5656601 DOI: 10.1038/s41598-017-13172-y] [Citation(s) in RCA: 72] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Accepted: 09/18/2017] [Indexed: 11/09/2022] Open
Abstract
Lead (Pb) free non-toxic perovskite solar cells have become more important in the commercialization of the photovoltaic devices. In this study the structural, electronic, optical and mechanical properties of Pb-free inorganic metal halide cubic perovskites CsBX3 (B = Sn, Ge; X = I, Br, Cl) for perovskite solar cells are simulated using first-principles Density Functional Theory (DFT). These compounds are semiconductors with direct band gap energy and mechanically stable. Results suggest that the materials have high absorption coefficient, low reflectivity and high optical conductivity with potential application in solar cells and other optoelectronic energy devices. On the basis of the optical properties, one can expect that the Germanium (Ge) would be a better replacement of Pb as Ge containing compounds have higher optical absorption and optical conductivity than that of Pb containing compounds. A combinational analysis of the electronic, optical and mechanical properties of the compounds suggests that CsGeI3 based perovskite is the best Pb-free inorganic metal halide semiconductor for the solar cell application. However, the compound with solid solution of CsGe(I0.7Br0.3)3 is found to be mechanically more ductile than CsGeI3. This study will also guide to obtain Pb-free organic perovskites for optoelectronic devices.
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Affiliation(s)
- Md Roknuzzaman
- School of Chemistry, Physics and Mechanical Engineering and Institute of Future Environments, Queensland University of Technology, QLD 4000, Brisbane, Australia
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics and Mechanical Engineering and Institute of Future Environments, Queensland University of Technology, QLD 4000, Brisbane, Australia
| | - Hongxia Wang
- School of Chemistry, Physics and Mechanical Engineering and Institute of Future Environments, Queensland University of Technology, QLD 4000, Brisbane, Australia
| | - Aijun Du
- School of Chemistry, Physics and Mechanical Engineering and Institute of Future Environments, Queensland University of Technology, QLD 4000, Brisbane, Australia
| | - Tuquabo Tesfamichael
- School of Chemistry, Physics and Mechanical Engineering and Institute of Future Environments, Queensland University of Technology, QLD 4000, Brisbane, Australia.
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120
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Prasad K, Bazaka O, Chua M, Rochford M, Fedrick L, Spoor J, Symes R, Tieppo M, Collins C, Cao A, Markwell D, Ostrikov KK, Bazaka K. Metallic Biomaterials: Current Challenges and Opportunities. Materials (Basel) 2017; 10:E884. [PMID: 28773240 PMCID: PMC5578250 DOI: 10.3390/ma10080884] [Citation(s) in RCA: 190] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/27/2017] [Revised: 07/14/2017] [Accepted: 07/25/2017] [Indexed: 11/16/2022]
Abstract
Metallic biomaterials are engineered systems designed to provide internal support to biological tissues and they are being used largely in joint replacements, dental implants, orthopaedic fixations and stents. Higher biomaterial usage is associated with an increased incidence of implant-related complications due to poor implant integration, inflammation, mechanical instability, necrosis and infections, and associated prolonged patient care, pain and loss of function. In this review, we will briefly explore major representatives of metallic biomaterials along with the key existing and emerging strategies for surface and bulk modification used to improve biointegration, mechanical strength and flexibility of biometals, and discuss their compatibility with the concept of 3D printing.
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Affiliation(s)
- Karthika Prasad
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
- CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organization, P.O. Box 218, Lindfield, NSW 2070, Australia.
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | - Olha Bazaka
- College of Science and Engineering, Technology and Engineering, James Cook University, Townsville, QLD 4810, Australia.
| | - Ming Chua
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | - Madison Rochford
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | - Liam Fedrick
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | - Jordan Spoor
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | - Richard Symes
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | - Marcus Tieppo
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | - Cameron Collins
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | - Alex Cao
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | - David Markwell
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
- CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organization, P.O. Box 218, Lindfield, NSW 2070, Australia.
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | - Kateryna Bazaka
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
- CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organization, P.O. Box 218, Lindfield, NSW 2070, Australia.
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD 4000, Australia.
- College of Science and Engineering, Technology and Engineering, James Cook University, Townsville, QLD 4810, Australia.
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121
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Wang XQ, Zhou RW, Groot GD, Bazaka K, Murphy AB, Ostrikov KK. Spectral characteristics of cotton seeds treated by a dielectric barrier discharge plasma. Sci Rep 2017; 7:5601. [PMID: 28717249 PMCID: PMC5514119 DOI: 10.1038/s41598-017-04963-4] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 05/22/2017] [Indexed: 11/24/2022] Open
Abstract
Cold atmospheric plasma has recently emerged as a simple, low-cost and efficient physical method for inducing significant biological responses in seeds and plants without the use of traditional, potentially environmentally-hazardous chemicals, fungicides or hormones. While the beneficial effects of plasma treatment on seed germination, disease resistance and agricultural output have been reported, the mechanisms that underpin the observed biological responses are yet to be fully described. This study employs Fourier Transform Infrared (FTIR) spectroscopy and emission spectroscopy to capture chemical interactions between plasmas and seed surfaces with the aim to provide a more comprehensive account of plasma-seed interactions. FTIR spectroscopy of the seed surface confirms plasma-induced chemical etching of the surface. The etching facilitates permeation of water into the seed, which is confirmed by water uptake measurements. FTIR of exhaust and emission spectra of discharges show oxygen-containing species known for their ability to stimulate biochemical processes and deactivate pathogenic microorganisms. In addition, water gas, CO2, CO and molecules containing -C(CH3)3- moieties observed in FTIR spectra of the exhaust gas during plasma treatment may be partly responsible for the plasma chemical etching of seed surface through oxidizing the organic components of the seed coat.
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Affiliation(s)
- Xing-Quan Wang
- CSIRO-QUT Joint Sustainable Materials and Devices Laboratory, PO Box 218, Lindfield, NSW 2070, Australia
- School of Physics and Electronic Information, Institute of Optoelectronic Materials and Technology, Gannan Normal University, Ganzhou, 341000, China
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Ren-Wu Zhou
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Gerard de Groot
- CSIRO Manufacturing, PO Box 218, Lindfield, NSW 2070, Australia
| | - Kateryna Bazaka
- CSIRO-QUT Joint Sustainable Materials and Devices Laboratory, PO Box 218, Lindfield, NSW 2070, Australia.
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | | | - Kostya Ken Ostrikov
- CSIRO-QUT Joint Sustainable Materials and Devices Laboratory, PO Box 218, Lindfield, NSW 2070, Australia
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
- CSIRO Manufacturing, PO Box 218, Lindfield, NSW 2070, Australia
- Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD 4000, Australia
- Institute for Future Environments, Queensland University of Technology, Brisbane, QLD 4000, Australia
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122
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Pineda S, Borghi FF, Seo DH, Yick S, Lawn M, van der Laan T, Han ZJ, Ostrikov KK. Multifunctional graphene micro-islands: Rapid, low-temperature plasma-enabled synthesis and facile integration for bioengineering and genosensing applications. Biosens Bioelectron 2017; 89:437-443. [DOI: 10.1016/j.bios.2016.04.072] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 04/20/2016] [Accepted: 04/21/2016] [Indexed: 10/21/2022]
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123
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Bo Z, Tian Y, Han ZJ, Wu S, Zhang S, Yan J, Cen K, Ostrikov KK. Tuneable fluidics within graphene nanogaps for water purification and energy storage. Nanoscale Horiz 2017; 2:89-98. [PMID: 32260670 DOI: 10.1039/c6nh00167j] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Precise control of liquid-solid interactions within sub-micrometer spaces is critical to maximize the active surface areas in porous materials, yet is challenging because of the limited liquid penetration. Here we discover an effective, dry-climate natural plant-inspired approach to guide water into sub-micrometer graphene microwells (Sub-μGWs) and to tune the transition from the hydrophobic to superhydrophilic states. Dry plasma texturing of Sub-μGWs by graphene 'nano-flaps' which adjust the tilt and density upon controlled liquid evaporation leads to controlled and stable sub-micrometer-scale surface modification and variable wettability in a wide range. This effect helps capture Au nanoparticles on the Sub-μGW surfaces as a proof-of-principle water purification platform and tune the charge-storage capacity and frequency response of Sub-μGW-based supercapacitors without altering the Sub-μGW backbones. The outcomes may be extended into diverse materials and solutions thus opening new opportunities for next-generation devices, systems and applications.
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Affiliation(s)
- Zheng Bo
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China.
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124
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Seo DH, Pineda S, Fang J, Gozukara Y, Yick S, Bendavid A, Lam SKH, Murdock AT, Murphy AB, Han ZJ, Ostrikov KK. Single-step ambient-air synthesis of graphene from renewable precursors as electrochemical genosensor. Nat Commun 2017; 8:14217. [PMID: 28134336 PMCID: PMC5290271 DOI: 10.1038/ncomms14217] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 12/09/2016] [Indexed: 11/09/2022] Open
Abstract
Thermal chemical vapour deposition techniques for graphene fabrication, while promising, are thus far limited by resource-consuming and energy-intensive principles. In particular, purified gases and extensive vacuum processing are necessary for creating a highly controlled environment, isolated from ambient air, to enable the growth of graphene films. Here we exploit the ambient-air environment to enable the growth of graphene films, without the need for compressed gases. A renewable natural precursor, soybean oil, is transformed into continuous graphene films, composed of single-to-few layers, in a single step. The enabling parameters for controlled synthesis and tailored properties of the graphene film are discussed, and a mechanism for the ambient-air growth is proposed. Furthermore, the functionality of the graphene is demonstrated through direct utilization as an electrode to realize an effective electrochemical genosensor. Our method is applicable to other types of renewable precursors and may open a new avenue for low-cost synthesis of graphene films. Graphene films are commonly produced by thermal chemical vapour deposition, which is capable of producing high-quality films but still limited by factors such as high cost. Here, the authors report the growth of single-to-few-layer continuous graphene films under ambient-air conditions.
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Affiliation(s)
- Dong Han Seo
- CSIRO Manufacturing, P.O. Box 218, Bradfield Road, Lindfield, New South Wales 2070, Australia
| | - Shafique Pineda
- CSIRO Manufacturing, P.O. Box 218, Bradfield Road, Lindfield, New South Wales 2070, Australia.,School of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia
| | - Jinghua Fang
- School of Mathematical and Physical Sciences, The University of Technology, Sydney, New South Wales 2007, Australia
| | - Yesim Gozukara
- CSIRO Manufacturing, P.O. Box 218, Bradfield Road, Lindfield, New South Wales 2070, Australia
| | - Samuel Yick
- CSIRO Manufacturing, P.O. Box 218, Bradfield Road, Lindfield, New South Wales 2070, Australia
| | - Avi Bendavid
- CSIRO Manufacturing, P.O. Box 218, Bradfield Road, Lindfield, New South Wales 2070, Australia
| | - Simon Kwai Hung Lam
- CSIRO Manufacturing, P.O. Box 218, Bradfield Road, Lindfield, New South Wales 2070, Australia
| | - Adrian T Murdock
- CSIRO Manufacturing, P.O. Box 218, Bradfield Road, Lindfield, New South Wales 2070, Australia
| | - Anthony B Murphy
- CSIRO Manufacturing, P.O. Box 218, Bradfield Road, Lindfield, New South Wales 2070, Australia
| | - Zhao Jun Han
- CSIRO Manufacturing, P.O. Box 218, Bradfield Road, Lindfield, New South Wales 2070, Australia
| | - Kostya Ken Ostrikov
- CSIRO Manufacturing, P.O. Box 218, Bradfield Road, Lindfield, New South Wales 2070, Australia.,School of Physics, The University of Sydney, Sydney, New South Wales 2006, Australia.,Institute for Future Environments and Institute for Health and Biomedical Innovation, School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland 4000, Australia
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125
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Wang XQ, Wang FP, Chen W, Huang J, Bazaka K, Ostrikov KK. Non-equilibrium plasma prevention of Schistosoma japonicum transmission. Sci Rep 2016; 6:35353. [PMID: 27739459 PMCID: PMC5064309 DOI: 10.1038/srep35353] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 09/28/2016] [Indexed: 01/25/2023] Open
Abstract
Schistosoma japonicum is a widespread human and animal parasite that causes intestinal and hepatosplenic schistosomiasis linked to colon, liver and bladder cancers, and anemia. Estimated 230 million people are currently infected with Schistosoma spp, with 779 million people at risk of contracting the parasite. Infection occurs when a host comes into contact with cercariae, a planktonic larval stage of the parasite, and can be prevented by inactivating the larvae, commonly by chemical treatment. We investigated the use of physical non-equilibrium plasma generated at atmospheric pressure using custom-made dielectric barrier discharge reactor to kill S. japonicum cercariae. Survival rate decreased with treatment time and applied power. Plasmas generated in O2 and air gas discharges were more effective in killing S. japonicum cercariae than that generated in He, which is directly related to the mechanism by which cercariae are inactivated. Reactive oxygen species, such as O atoms, abundant in O2 plasma and NO in air plasma play a major role in killing of S. japonicum cercariae via oxidation mechanisms. Similar level of efficacy is also shown for a gliding arc discharge plasma jet generated in ambient air, a system that may be more appropriate for scale-up and integration into existing water treatment processes.
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Affiliation(s)
- Xing-Quan Wang
- School of Physics and Electronic Information, Institute of Optoelectronic Materials and Technology, Gannan Normal University, Ganzhou 341000, China.,School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.,Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD 4000, Australia
| | - Feng-Peng Wang
- School of Physics and Electronic Information, Institute of Optoelectronic Materials and Technology, Gannan Normal University, Ganzhou 341000, China
| | - Wei Chen
- School of Physics and Electronic Information, Institute of Optoelectronic Materials and Technology, Gannan Normal University, Ganzhou 341000, China
| | - Jun Huang
- School of Physics and Electronic Information, Institute of Optoelectronic Materials and Technology, Gannan Normal University, Ganzhou 341000, China
| | - Kateryna Bazaka
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.,Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD 4000, Australia.,Institute for Future Environments, Queensland University of Technology, Brisbane, QLD 4000, Australia.,CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O.Box 218, Lindfield, NSW 2070, Australia
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.,Institute of Health and Biomedical Innovation, Queensland University of Technology, Brisbane, QLD 4000, Australia.,Institute for Future Environments, Queensland University of Technology, Brisbane, QLD 4000, Australia.,CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O.Box 218, Lindfield, NSW 2070, Australia
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126
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Askari S, Ul Haq A, Macias-Montero M, Levchenko I, Yu F, Zhou W, Ostrikov KK, Maguire P, Svrcek V, Mariotti D. Ultra-small photoluminescent silicon-carbide nanocrystals by atmospheric-pressure plasmas. Nanoscale 2016; 8:17141-17149. [PMID: 27722686 DOI: 10.1039/c6nr03702j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Highly size-controllable synthesis of free-standing perfectly crystalline silicon carbide nanocrystals has been achieved for the first time through a plasma-based bottom-up process. This low-cost, scalable, ligand-free atmospheric pressure technique allows fabrication of ultra-small (down to 1.5 nm) nanocrystals with very low level of surface contamination, leading to fundamental insights into optical properties of the nanocrystals. This is also confirmed by their exceptional photoluminescence emission yield enhanced by more than 5 times by reducing the nanocrystals sizes in the range of 1-5 nm, which is attributed to quantum confinement in ultra-small nanocrystals. This method is potentially scalable and readily extendable to a wide range of other classes of materials. Moreover, this ligand-free process can produce colloidal nanocrystals by direct deposition into liquid, onto biological materials or onto the substrate of choice to form nanocrystal films. Our simple but efficient approach based on non-equilibrium plasma environment is a response to the need of most efficient bottom-up processes in nanosynthesis and nanotechnology.
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Affiliation(s)
- Sadegh Askari
- Nanotechnology & Integrated Bio-Engineering Centre, Ulster University, BT37 0QB, UK. and Department of Physics, Chemistry and biology (IFM), Linköping University, SE-581 83 Linköping, Sweden
| | - Atta Ul Haq
- Nanotechnology & Integrated Bio-Engineering Centre, Ulster University, BT37 0QB, UK.
| | - Manuel Macias-Montero
- Nanotechnology & Integrated Bio-Engineering Centre, Ulster University, BT37 0QB, UK.
| | - Igor Levchenko
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane QLD 4000, Australia
| | - Fengjiao Yu
- EaStChem, School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK
| | - Wuzong Zhou
- EaStChem, School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, UK
| | - Kostya Ken Ostrikov
- Institute for Future Environments and School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane QLD 4000, Australia and CSIRO-QUT Joint Sustainable Processes and Devices Laboratory, Commonwealth Scientific and Industrial Research Organization, P.O. Box 218, Lindfield, NSW 2070, Australia
| | - Paul Maguire
- Nanotechnology & Integrated Bio-Engineering Centre, Ulster University, BT37 0QB, UK.
| | - Vladimir Svrcek
- Research Center of Photovoltaics, National Institute of Advanced Industrial Science and Technology-AIST, Central 2, Tsukuba, Japan
| | - Davide Mariotti
- Nanotechnology & Integrated Bio-Engineering Centre, Ulster University, BT37 0QB, UK.
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127
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Zhou R, Zhou R, Zhang X, Zhuang J, Yang S, Bazaka K, Ken Ostrikov K. Effects of Atmospheric-Pressure N2, He, Air, and O2 Microplasmas on Mung Bean Seed Germination and Seedling Growth. Sci Rep 2016; 6:32603. [PMID: 27584560 PMCID: PMC5007987 DOI: 10.1038/srep32603] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 08/10/2016] [Indexed: 01/25/2023] Open
Abstract
Atmospheric-pressure N2, He, air, and O2 microplasma arrays have been used to investigate the effects of plasma treatment on seed germination and seedling growth of mung bean in aqueous solution. Seed germination and growth of mung bean were found to strongly depend on the feed gases used to generate plasma and plasma treatment time. Compared to the treatment with atmospheric-pressure O2, N2 and He microplasma arrays, treatment with air microplasma arrays was shown to be more efficient in improving both the seed germination rate and seedling growth, the effect attributed to solution acidification and interactions with plasma-generated reactive oxygen and nitrogen species. Acidic environment caused by air discharge in water may promote leathering of seed chaps, thus enhancing the germination rate of mung bean, and stimulating the growth of hypocotyl and radicle. The interactions between plasma-generated reactive species, such as hydrogen peroxide (H2O2) and nitrogen compounds, and seeds led to a significant acceleration of seed germination and an increase in seedling length of mung bean. Electrolyte leakage rate of mung bean seeds soaked in solution activated using air microplasma was the lowest, while the catalase activity of thus-treated mung bean seeds was the highest compared to other types of microplasma.
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Affiliation(s)
- Renwu Zhou
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland 4000, Australia.,Fujian Key Laboratory for Plasma and Magnetic Resonance, School of Physics Science and Technology, Xiamen University, Xiamen 361005, China
| | - Rusen Zhou
- Department of Chemical and Biochemical Engineering, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, China
| | - Xianhui Zhang
- Fujian Key Laboratory for Plasma and Magnetic Resonance, School of Physics Science and Technology, Xiamen University, Xiamen 361005, China
| | - Jinxing Zhuang
- Fujian Key Laboratory for Plasma and Magnetic Resonance, School of Physics Science and Technology, Xiamen University, Xiamen 361005, China
| | - Size Yang
- Fujian Key Laboratory for Plasma and Magnetic Resonance, School of Physics Science and Technology, Xiamen University, Xiamen 361005, China
| | - Kateryna Bazaka
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland 4000, Australia.,CSIRO-QUT Joint Sustainable Materials and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P. O. Box 218, Lindfield, NSW 2070, Australia
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland 4000, Australia.,CSIRO-QUT Joint Sustainable Materials and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P. O. Box 218, Lindfield, NSW 2070, Australia
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128
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Levchenko I, Ostrikov KK, Zheng J, Li X, Keidar M, B K Teo K. Scalable graphene production: perspectives and challenges of plasma applications. Nanoscale 2016; 8:10511-10527. [PMID: 26837802 DOI: 10.1039/c5nr06537b] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Graphene, a newly discovered and extensively investigated material, has many unique and extraordinary properties which promise major technological advances in fields ranging from electronics to mechanical engineering and food production. Unfortunately, complex techniques and high production costs hinder commonplace applications. Scaling of existing graphene production techniques to the industrial level without compromising its properties is a current challenge. This article focuses on the perspectives and challenges of scalability, equipment, and technological perspectives of the plasma-based techniques which offer many unique possibilities for the synthesis of graphene and graphene-containing products. The plasma-based processes are amenable for scaling and could also be useful to enhance the controllability of the conventional chemical vapour deposition method and some other techniques, and to ensure a good quality of the produced graphene. We examine the unique features of the plasma-enhanced graphene production approaches, including the techniques based on inductively-coupled and arc discharges, in the context of their potential scaling to mass production following the generic scaling approaches applicable to the existing processes and systems. This work analyses a large amount of the recent literature on graphene production by various techniques and summarizes the results in a tabular form to provide a simple and convenient comparison of several available techniques. Our analysis reveals a significant potential of scalability for plasma-based technologies, based on the scaling-related process characteristics. Among other processes, a greater yield of 1 g × h(-1) m(-2) was reached for the arc discharge technology, whereas the other plasma-based techniques show process yields comparable to the neutral-gas based methods. Selected plasma-based techniques show lower energy consumption than in thermal CVD processes, and the ability to produce graphene flakes of various sizes reaching hundreds of square millimetres, and the thickness varying from a monolayer to 10-20 layers. Additional factors such as electrical voltage and current, not available in thermal CVD processes could potentially lead to better scalability, flexibility and control of the plasma-based processes. Advantages and disadvantages of various systems are also considered.
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Affiliation(s)
- Igor Levchenko
- School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia.
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, Queensland 4000, Australia. and Joint CSIRO - QUT Sustainable Materials and Devices Laboratory, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield, New South Wales 2070, Australia. and Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Jie Zheng
- Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Xingguo Li
- Beijing National Laboratory for Molecular Sciences (BNLMS), College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China
| | - Michael Keidar
- School of Engineering and Applied Science, George Washington University, Washington, DC 20052, USA
| | - Kenneth B K Teo
- AIXTRON Nanoinstruments, Buckingway Business Park, Swavesey, Cambridge CB24 4FQ, UK
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129
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Han ZJ, Bo Z, Seo DH, Pineda S, Wang Y, Yang HY, Ostrikov KK. High Pseudocapacitive Performance of MnO2 Nanowires on Recyclable Electrodes. ChemSusChem 2016; 9:1020-1026. [PMID: 27059434 DOI: 10.1002/cssc.201600024] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 02/11/2016] [Indexed: 06/05/2023]
Abstract
Manganese oxides are promising pseudocapacitve materials for achieving both high power and energy densities in pseudocapacitors. However, it remains a great challenge to develop MnO2 -based high-performance electrodes due to their low electrical conductance and poor stability. Here we show that MnO2 nanowires anchored on electrochemically modified graphite foil (EMGF) have a high areal capacitance of 167 mF cm(-2) at a discharge current density of 0.2 mA cm(-2) and a high capacitance retention after 5000 charge/discharge cycles (115 %), which are among the best values reported for any MnO2 -based hybrid structures. The EMGF support can also be recycled and the newly deposited MnO2 -based hybrids retain similarly high performance. These results demonstrate the successful preparation of pseudocapacitors with high capacity and cycling stability, which may open a new opportunity towards a sustainable and environmentally friendly method of utilizing electrochemical energy storage devices.
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Affiliation(s)
- Zhao Jun Han
- CSIRO Manufacturing, 36 Bradfield Road, Lindfield, NSW, 2070, Australia.
| | - Zheng Bo
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang, 310027, PR China
| | - Dong Han Seo
- CSIRO Manufacturing, 36 Bradfield Road, Lindfield, NSW, 2070, Australia
| | - Shafique Pineda
- CSIRO Manufacturing, 36 Bradfield Road, Lindfield, NSW, 2070, Australia
| | - Ye Wang
- Pillar of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, 487372, Singapore, Singapore
| | - Hui Ying Yang
- Pillar of Engineering Product Development, Singapore University of Technology and Design, 8 Somapah Road, 487372, Singapore, Singapore
| | - Kostya Ken Ostrikov
- CSIRO Manufacturing, 36 Bradfield Road, Lindfield, NSW, 2070, Australia
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, Queensland, 4000, Australia
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130
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Aramesh M, Djalalian-Assl A, Yajadda MMA, Prawer S, Ostrikov KK. Thin Nanoporous Metal-Insulator-Metal Membranes. ACS Appl Mater Interfaces 2016; 8:4292-4297. [PMID: 26846250 DOI: 10.1021/acsami.5b11182] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Insulating nanoporous materials are promising platforms for soft-ionizing membranes; however, improvement in fabrication processes and the quality and high breakdown resistance of the thin insulator layers are needed for high integration and performance. Here, scalable fabrication of highly porous, thin, silicon dioxide membranes with controlled thickness is demonstrated using plasma-enhanced chemical-vapor-deposition. The fabricated membranes exhibit good insulating properties with a breakdown voltage of 1 × 10(7) V/cm. Our calculations suggest that the average electric field inside a nanopore of the membranes can be as high as 1 × 10(6) V/cm; sufficient for ionization of wide range of molecules. These metal-insulator-metal nanoporous arrays are promising for applications such soft ionizing membranes for mass spectroscopy.
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Affiliation(s)
- Morteza Aramesh
- Institute for Future Environments, School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology , Brisbane, QLD 4000, Australia
- School of Physics, the University of Melbourne , Melbourne, VIC 3010, Australia
| | - Amir Djalalian-Assl
- School of Physics, the University of Melbourne , Melbourne, VIC 3010, Australia
| | - Mir Massoud Aghili Yajadda
- Manufacturing Flagship, Commonwealth Scientific and Industrial Research Organisation (CSIRO), PO Box 218, Lindfield, NSW 2070, Australia
| | - Steven Prawer
- School of Physics, the University of Melbourne , Melbourne, VIC 3010, Australia
| | - Kostya Ken Ostrikov
- Institute for Future Environments, School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology , Brisbane, QLD 4000, Australia
- Plasma Nanoscience Laboratories, Commonwealth Scientific and Industrial Research Organisation (CSIRO) , Lindfield, New South Wales 2070, Australia
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131
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132
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Abstract
Sustainable societal and economic development relies on novel nanotechnologies that offer maximum efficiency at minimal environmental cost. Yet, it is very challenging to apply green chemistry approaches across the entire life cycle of nanotech products, from design and nanomaterial synthesis to utilization and disposal. Recently, novel, efficient methods based on nonequilibrium reactive plasma chemistries that minimize the process steps and dramatically reduce the use of expensive and hazardous reagents have been applied to low-cost natural and waste sources to produce value-added nanomaterials with a wide range of applications. This review discusses the distinctive effects of nonequilibrium reactive chemistries and how these effects can aid and advance the integration of sustainable chemistry into each stage of nanotech product life. Examples of the use of enabling plasma-based technologies in sustainable production and degradation of nanotech products are discussed-from selection of precursors derived from natural resources and their conversion into functional building units, to methods for green synthesis of useful naturally degradable carbon-based nanomaterials, to device operation and eventual disintegration into naturally degradable yet potentially reusable byproducts.
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Affiliation(s)
- Kateryna Bazaka
- Institute for Future Environments, School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology , Brisbane, Queensland 4000, Australia.,Electronics Materials Lab, College of Science, Technology and Engineering, James Cook University , Townsville, Queensland 4811, Australia.,CSIRO-QUT Joint Sustainable Materials and Devices Laboratory, Commonwealth Scientific and Industrial Research Organization , P.O. Box 218, Lindfield, New South Wales 2070, Australia
| | - Mohan V Jacob
- Electronics Materials Lab, College of Science, Technology and Engineering, James Cook University , Townsville, Queensland 4811, Australia
| | - Kostya Ken Ostrikov
- Institute for Future Environments, School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology , Brisbane, Queensland 4000, Australia.,CSIRO-QUT Joint Sustainable Materials and Devices Laboratory, Commonwealth Scientific and Industrial Research Organization , P.O. Box 218, Lindfield, New South Wales 2070, Australia.,School of Physics, The University of Sydney , Sydney, New South Wales 2006, Australia
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133
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Mangla O, Roy S, Ostrikov KK. Dense Plasma Focus-Based Nanofabrication of III-V Semiconductors: Unique Features and Recent Advances. Nanomaterials (Basel) 2015; 6:nano6010004. [PMID: 28344261 PMCID: PMC5302538 DOI: 10.3390/nano6010004] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 11/14/2015] [Accepted: 12/17/2015] [Indexed: 11/16/2022]
Abstract
The hot and dense plasma formed in modified dense plasma focus (DPF) device has been used worldwide for the nanofabrication of several materials. In this paper, we summarize the fabrication of III–V semiconductor nanostructures using the high fluence material ions produced by hot, dense and extremely non-equilibrium plasma generated in a modified DPF device. In addition, we present the recent results on the fabrication of porous nano-gallium arsenide (GaAs). The details of morphological, structural and optical properties of the fabricated nano-GaAs are provided. The effect of rapid thermal annealing on the above properties of porous nano-GaAs is studied. The study reveals that it is possible to tailor the size of pores with annealing temperature. The optical properties of these porous nano-GaAs also confirm the possibility to tailor the pore sizes upon annealing. Possible applications of the fabricated and subsequently annealed porous nano-GaAs in transmission-type photo-cathodes and visible optoelectronic devices are discussed. These results suggest that the modified DPF is an effective tool for nanofabrication of continuous and porous III–V semiconductor nanomaterials. Further opportunities for using the modified DPF device for the fabrication of novel nanostructures are discussed as well.
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Affiliation(s)
- Onkar Mangla
- Department of Physics and Astrophysics, University of Delhi, Delhi 110007, India.
- Physics Department, Hindu College, University of Delhi, Delhi 110007, India.
| | - Savita Roy
- Physics Department, Daulat Ram College, University of Delhi, Delhi 110007, India.
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane 4000, Australia.
- Plasma Nanoscience Laboratories, Commonwealth Scientific and Industrial Research Organisation, P.O. Box 218, Lindfield 2070, Australia.
- Plasma Nanoscience, School of Physics, The University of Sydney, Sydney 2006, Australia.
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134
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van der Laan T, Kumar S, Ostrikov KK. Water-mediated and instantaneous transfer of graphene grown at 220 °C enabled by a plasma. Nanoscale 2015; 7:20564-20570. [PMID: 26593870 DOI: 10.1039/c5nr06365e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Atomically thin graphene holds exceptional promise to enable new functionalities and drastically improve performance of electronic, energy, sensing, and bio-medical devices. One of the most promising approaches to device-compatible graphene synthesis is chemical vapour deposition on a copper catalyst; this technique however is limited by very high temperatures (∼900 °C) and a lack of control as well as post-growth separation from the catalyst. We demonstrate and explain how, through the use of a plasma, a graphene film containing single layer graphene can be grown at temperature as low as 220 °C, the process can be controlled and an instant and water-mediated decoupling mechanism is realised. Potential use of our films in flexible transparent conductive films, electrical devices and magneto-electronics is demonstrated. Considering the benefits of catalyst reuse, energy efficiency, simplicity, and environmental friendliness, we present this versatile plasma process as a viable alternative to many existing graphene production approaches.
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Affiliation(s)
- Timothy van der Laan
- Plasma Nanoscience, CSIRO Manufacturing Flagship, P.O. Box 218, Lindfield, New South Wales 2070, Australia.
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135
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Aramesh M, Tong W, Fox K, Turnley A, Seo DH, Prawer S, Ostrikov KK. Nanocarbon-Coated Porous Anodic Alumina for Bionic Devices. Materials (Basel) 2015; 8:4992-5006. [PMID: 28793486 PMCID: PMC5455473 DOI: 10.3390/ma8084992] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 07/23/2015] [Accepted: 08/03/2015] [Indexed: 02/03/2023]
Abstract
A highly-stable and biocompatible nanoporous electrode is demonstrated herein. The electrode is based on a porous anodic alumina which is conformally coated with an ultra-thin layer of diamond-like carbon. The nanocarbon coating plays an essential role for the chemical stability and biocompatibility of the electrodes; thus, the coated electrodes are ideally suited for biomedical applications. The corrosion resistance of the proposed electrodes was tested under extreme chemical conditions, such as in boiling acidic/alkali environments. The nanostructured morphology and the surface chemistry of the electrodes were maintained after wet/dry chemical corrosion tests. The non-cytotoxicity of the electrodes was tested by standard toxicity tests using mouse fibroblasts and cortical neurons. Furthermore, the cell-electrode interaction of cortical neurons with nanocarbon coated nanoporous anodic alumina was studied in vitro. Cortical neurons were found to attach and spread to the nanocarbon coated electrodes without using additional biomolecules, whilst no cell attachment was observed on the surface of the bare anodic alumina. Neurite growth appeared to be sensitive to nanotopographical features of the electrodes. The proposed electrodes show a great promise for practical applications such as retinal prostheses and bionic implants in general.
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Affiliation(s)
- Morteza Aramesh
- School of Physics, the University of Melbourne, Melbourne, VIC 3010, Australia.
- School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
- Plasma Nanoscience Laboratories, Commonwealth Scientific and Industrial Research Organisation (CSIRO), PO Box 218, Lindfield, NSW 2070, Australia.
| | - Wei Tong
- School of Physics, the University of Melbourne, Melbourne, VIC 3010, Australia.
| | - Kate Fox
- Center for Additive Manufacturing, School of Aerospace, Mechanical and Manufacturing Engineering, RMIT University, Carlton, VIC 3053, Australia.
| | - Ann Turnley
- Department of Anatomy and Neuroscience, the University of Melbourne, Parkville, VIC 3010, Australia.
| | - Dong Han Seo
- Plasma Nanoscience Laboratories, Commonwealth Scientific and Industrial Research Organisation (CSIRO), PO Box 218, Lindfield, NSW 2070, Australia.
| | - Steven Prawer
- School of Physics, the University of Melbourne, Melbourne, VIC 3010, Australia.
| | - Kostya Ken Ostrikov
- School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
- Plasma Nanoscience Laboratories, Commonwealth Scientific and Industrial Research Organisation (CSIRO), PO Box 218, Lindfield, NSW 2070, Australia.
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136
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Somanathan T, Prasad K, Ostrikov KK, Saravanan A, Krishna VM. Graphene Oxide Synthesis from Agro Waste. Nanomaterials (Basel) 2015; 5:826-834. [PMID: 28347038 PMCID: PMC5312887 DOI: 10.3390/nano5020826] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/06/2015] [Revised: 05/09/2015] [Accepted: 05/12/2015] [Indexed: 11/16/2022]
Abstract
A new method of graphene oxide (GO) synthesis via single-step reforming of sugarcane bagasse agricultural waste by oxidation under muffled atmosphere conditions is reported. The strong and sharp X-ray diffraction peak at 2θ = 11.6° corresponds to an interlayer distance of 0.788 nm (d002) for the AB stacked GOs. High-resolution transmission electron microscopy (HRTEM) and selected-area electron diffraction (SAED) confirm the formation of the GO layer structure and the hexagonal framework. This is a promising method for fast and effective synthesis of GO from sugarcane bagasse intended for a variety of energy and environmental applications.
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Affiliation(s)
- Thirunavukkarasu Somanathan
- Department of Nanoscience, School of Basic Sciences, Vels University, Pallavaram, Chennai, Tamil Nadu 600117, India.
- Center for Advanced Research and Development (CARD), Vels University, Pallavaram, Chennai, Tamil Nadu 600117, India.
| | - Karthika Prasad
- Department of Nanoscience, School of Basic Sciences, Vels University, Pallavaram, Chennai, Tamil Nadu 600117, India.
- Institute of Future Environments, Nanotechnology and Molecular Science, School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | - Kostya Ken Ostrikov
- Institute of Future Environments, Nanotechnology and Molecular Science, School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia.
| | - Arumugam Saravanan
- Department of Nanoscience, School of Basic Sciences, Vels University, Pallavaram, Chennai, Tamil Nadu 600117, India.
| | - Vemula Mohana Krishna
- Department of Nanoscience, School of Basic Sciences, Vels University, Pallavaram, Chennai, Tamil Nadu 600117, India.
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137
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Bo Z, Qian J, Han ZJ, Duan L, Qiu K, Ostrikov KK, Yan J, Cen K. Note: Rapid reduction of graphene oxide paper by glow discharge plasma. Rev Sci Instrum 2015; 86:056101. [PMID: 26026562 DOI: 10.1063/1.4919732] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
This note reports on a novel method for the rapid reduction of graphene oxide (GO) paper using a glow discharge plasma reactor. Glow discharge is produced and sustained between two parallel-plate graphite electrodes at a pressure of 240 mTorr. By exposing GO paper at the junction of negative-glow and Faraday-dark area for 4 min, the oxygen-containing groups can be effectively removed (C/O ratio increases from 2.6 to 7.9), while the material integrality and flexibility are kept well. Electrochemical measurements demonstrate that the as-obtained reduced GO paper can be potentially used for supercapacitor application.
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Affiliation(s)
- Zheng Bo
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Jiajing Qian
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Zhao Jun Han
- CSIRO Manufacturing Flagship, P.O. Box 218, Bradfield Road, Lindfield, New South Wales 2070, Australia
| | - Liangping Duan
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Kunzan Qiu
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Kostya Ken Ostrikov
- CSIRO Manufacturing Flagship, P.O. Box 218, Bradfield Road, Lindfield, New South Wales 2070, Australia
| | - Jianhua Yan
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
| | - Kefa Cen
- State Key Laboratory of Clean Energy Utilization, College of Energy Engineering, Zhejiang University, Hangzhou, Zhejiang 310027, China
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138
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Mao S, Wen Z, Ci S, Guo X, Ostrikov KK, Chen J. Perpendicularly oriented MoSe2 /graphene nanosheets as advanced electrocatalysts for hydrogen evolution. Small 2015; 11:414-419. [PMID: 25208086 DOI: 10.1002/smll.201401598] [Citation(s) in RCA: 120] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Revised: 07/07/2014] [Indexed: 06/03/2023]
Abstract
By increasing the density of exposed active edges, the perpendicularly oriented structure of MoSe2 nanosheets facilitates ion/electrolyte transport at the electrode interface and minimizes the restacking of nanosheets, while the graphene improves the electrical contact between the catalyst and the electrode. This makes the MoSe2 /graphene hybrid perfect as a catalyst in the hydrogen evolution reaction (HER). It shows a greatly improved catalytic activity compared with bare MoSe2 nanosheets.
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Affiliation(s)
- Shun Mao
- Department of Mechanical Engineering, University of Wisconsin-Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin, 53211, USA
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139
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Zhu YG, Wang Y, Han ZJ, Shi Y, Wong JI, Huang ZX, Ostrikov KK, Yang HY. Catalyst engineering for lithium ion batteries: the catalytic role of Ge in enhancing the electrochemical performance of SnO2(GeO2)0.13/G anodes. Nanoscale 2014; 6:15020-15028. [PMID: 25367289 DOI: 10.1039/c4nr04736b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The catalytic role of germanium (Ge) was investigated to improve the electrochemical performance of tin dioxide grown on graphene (SnO(2)/G) nanocomposites as an anode material of lithium ion batteries (LIBs). Germanium dioxide (GeO(20) and SnO(2) nanoparticles (<10 nm) were uniformly anchored on the graphene sheets via a simple single-step hydrothermal method. The synthesized SnO(2)(GeO(2))0.13/G nanocomposites can deliver a capacity of 1200 mA h g(-1) at a current density of 100 mA g(-1), which is much higher than the traditional theoretical specific capacity of such nanocomposites (∼ 702 mA h g(-1)). More importantly, the SnO(2)(GeO(2))0.13/G nanocomposites exhibited an improved rate, large current capability (885 mA h g(-1) at a discharge current of 2000 mA g(-1)) and excellent long cycling stability (almost 100% retention after 600 cycles). The enhanced electrochemical performance was attributed to the catalytic effect of Ge, which enabled the reversible reaction of metals (Sn and Ge) to metals oxide (SnO(2) and GeO(2)) during the charge/discharge processes. Our demonstrated approach towards nanocomposite catalyst engineering opens new avenues for next-generation high-performance rechargeable Li-ion batteries anode materials.
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Affiliation(s)
- Yun Guang Zhu
- Pillar of Engineering Product Development, Singapore University of Technology and Design, 20 Dover Drive, Singapore 138682.
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140
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Fang J, Levchenko I, Han ZJ, Yick S, Ostrikov KK. Carbon nanotubes on nanoporous alumina: from surface mats to conformal pore filling. Nanoscale Res Lett 2014; 9:390. [PMID: 25177216 PMCID: PMC4147107 DOI: 10.1186/1556-276x-9-390] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/27/2014] [Accepted: 08/01/2014] [Indexed: 06/03/2023]
Abstract
UNLABELLED Control over nucleation and growth of multi-walled carbon nanotubes in the nanochannels of porous alumina membranes by several combinations of posttreatments, namely exposing the membrane top surface to atmospheric plasma jet and application of standard S1813 photoresist as an additional carbon precursor, is demonstrated. The nanotubes grown after plasma treatment nucleated inside the channels and did not form fibrous mats on the surface. Thus, the nanotube growth mode can be controlled by surface treatment and application of additional precursor, and complex nanotube-based structures can be produced for various applications. A plausible mechanism of nanotube nucleation and growth in the channels is proposed, based on the estimated depth of ion flux penetration into the channels. PACS 63.22.Np Layered systems; 68. Surfaces and interfaces; Thin films and nanosystems (structure and non-electronic properties); 81.07.-b Nanoscale materials and structures: fabrication and characterization.
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Affiliation(s)
- Jinghua Fang
- Plasma Nanoscience Laboratories, Manufacturing Flagship, CSIRO, P.O. Box 218, Lindfield, NSW 2070, Australia
- School of Physics, University of Melbourne, Parkville, VIC 3010, Australia
| | - Igor Levchenko
- Plasma Nanoscience Laboratories, Manufacturing Flagship, CSIRO, P.O. Box 218, Lindfield, NSW 2070, Australia
- Complex Systems, School of Physics, The University of Sydney, Sydney, NSW 2006, Australia
| | - Zhao Jun Han
- Plasma Nanoscience Laboratories, Manufacturing Flagship, CSIRO, P.O. Box 218, Lindfield, NSW 2070, Australia
| | - Samuel Yick
- Plasma Nanoscience Laboratories, Manufacturing Flagship, CSIRO, P.O. Box 218, Lindfield, NSW 2070, Australia
- Complex Systems, School of Physics, The University of Sydney, Sydney, NSW 2006, Australia
| | - Kostya Ken Ostrikov
- Plasma Nanoscience Laboratories, Manufacturing Flagship, CSIRO, P.O. Box 218, Lindfield, NSW 2070, Australia
- Complex Systems, School of Physics, The University of Sydney, Sydney, NSW 2006, Australia
- Institute for Future Environments and School of Chemistry, Physics, and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD 4000, Australia
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141
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Wang Y, Xing G, Han ZJ, Shi Y, Wong JI, Huang ZX, Ostrikov KK, Yang HY. Pre-lithiation of onion-like carbon/MoS2 nano-urchin anodes for high-performance rechargeable lithium ion batteries. Nanoscale 2014; 6:8884-8890. [PMID: 24962690 DOI: 10.1039/c4nr01553c] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Hybrid urchin-like nanostructures composed of a spherical onion-like carbon (OLC) core and MoS2 nanoleaves were synthesized by a simple solvothermal method followed by thermal annealing treatment. Compared to commercial MoS2 powder, MoS2/OLC nanocomposites exhibit enhanced electrochemical performance as anode materials of lithium-ion batteries (LIBs) with a specific capacity of 853 mA h g(-1) at a current density of 50 mA g(-1) after 60 cycles, and a moderate initial coulombic efficiency of 71.1%. Furthermore, a simple pre-lithiation method based on direct contact of lithium foil with MoS2/OLC nano-urchins was used to achieve a very high coulombic efficiency of 97.6% in the first discharge/charge cycle, which is at least 26% higher compared to that of pristine MoS2/OLC nano-urchins. This pre-lithiation method can be generalized to develop other carbon-metal sulfide nanohybrids for LIB anode materials. These results may open up a new avenue for the development of the next-generation high-performance LIBs.
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Affiliation(s)
- Ye Wang
- Pillar of Engineering Product Development, Singapore University of Technology and Design, 20 Dover Drive, 138682, Singapore.
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142
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Seo DH, Yick S, Han ZJ, Fang JH, Ostrikov KK. Synergistic fusion of vertical graphene nanosheets and carbon nanotubes for high-performance supercapacitor electrodes. ChemSusChem 2014; 7:2317-2324. [PMID: 24828784 DOI: 10.1002/cssc.201402045] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 03/20/2014] [Indexed: 06/03/2023]
Abstract
Graphene and carbon nanotubes (CNTs) are attractive electrode materials for supercapacitors. However, challenges such as the substrate-limited growth of CNTs, nanotube bundling in liquid electrolytes, under-utilized basal planes, and stacking of graphene sheets have so far impeded their widespread application. Here we present a hybrid structure formed by the direct growth of CNTs onto vertical graphene nanosheets (VGNS). VGNS are fabricated by a green plasma-assisted method to break down and reconstruct a natural precursor into an ordered graphitic structure. The synergistic combination of CNTs and VGNS overcomes the challenges intrinsic to both materials. The resulting VGNS/CNTs hybrids show a high specific capacitance with good cycling stability. The charge storage is based mainly on the non-Faradaic mechanism. In addition, a series of optimization experiments were conducted to reveal the critical factors that are required to achieve the demonstrated high supercapacitor performance.
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Affiliation(s)
- Dong Han Seo
- CSIRO Materials Science and Engineering, P.O. Box 218, Lindfield, NSW 2070 (Australia); School of Physics, The University of Sydney, Sydney, NSW 2006 (Australia)
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143
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Alhassen H, Antony V, Ghanem A, Yajadda MMA, Han ZJ, Ostrikov KK. Organic/Hybrid Nanoparticles and Single-Walled Carbon Nanotubes: Preparation Methods and Chiral Applications. Chirality 2014; 26:683-91. [DOI: 10.1002/chir.22321] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 02/03/2014] [Indexed: 11/06/2022]
Affiliation(s)
- Haysem Alhassen
- Chirality Program, Biomedical Science Discipline, Faculty of ESTEM; University of Canberra; Australian Capital Territory (ACT) Australia
| | - Vijy Antony
- Chirality Program, Biomedical Science Discipline, Faculty of ESTEM; University of Canberra; Australian Capital Territory (ACT) Australia
| | - Ashraf Ghanem
- Chirality Program, Biomedical Science Discipline, Faculty of ESTEM; University of Canberra; Australian Capital Territory (ACT) Australia
| | - Mir Massoud Aghili Yajadda
- Plasma Nanoscience Centre Australia (PNCA); CSIRO Materials Science and Engineering; Lindfield New South Wales Australia
| | - Zhao Jun Han
- Plasma Nanoscience Centre Australia (PNCA); CSIRO Materials Science and Engineering; Lindfield New South Wales Australia
| | - Kostya Ken Ostrikov
- Plasma Nanoscience Centre Australia (PNCA); CSIRO Materials Science and Engineering; Lindfield New South Wales Australia
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144
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Mai-Prochnow A, Murphy AB, McLean KM, Kong MG, Ostrikov KK. Atmospheric pressure plasmas: infection control and bacterial responses. Int J Antimicrob Agents 2014; 43:508-17. [PMID: 24637224 DOI: 10.1016/j.ijantimicag.2014.01.025] [Citation(s) in RCA: 132] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2013] [Revised: 01/25/2014] [Accepted: 01/27/2014] [Indexed: 12/26/2022]
Abstract
Cold atmospheric pressure plasma (APP) is a recent, cutting-edge antimicrobial treatment. It has the potential to be used as an alternative to traditional treatments such as antibiotics and as a promoter of wound healing, making it a promising tool in a range of biomedical applications with particular importance for combating infections. A number of studies show very promising results for APP-mediated killing of bacteria, including removal of biofilms of pathogenic bacteria such as Pseudomonas aeruginosa. However, the mode of action of APP and the resulting bacterial response are not fully understood. Use of a variety of different plasma-generating devices, different types of plasma gases and different treatment modes makes it challenging to show reproducibility and transferability of results. This review considers some important studies in which APP was used as an antibacterial agent, and specifically those that elucidate its mode of action, with the aim of identifying common bacterial responses to APP exposure. The review has a particular emphasis on mechanisms of interactions of bacterial biofilms with APP.
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Affiliation(s)
- Anne Mai-Prochnow
- CSIRO Materials Science and Engineering, P.O. Box 218, Lindfield, NSW 2070, Australia.
| | - Anthony B Murphy
- CSIRO Materials Science and Engineering, P.O. Box 218, Lindfield, NSW 2070, Australia
| | - Keith M McLean
- CSIRO Materials Science and Engineering, Bayview Avenue, Clayton, VIC 3168, Australia
| | - Michael G Kong
- Frank Reidy Research Center for Bioelectrics, Old Dominion University, Suite 422, 4211 Monarch Way, Norfolk, VA 23529, USA
| | - Kostya Ken Ostrikov
- CSIRO Materials Science and Engineering, P.O. Box 218, Lindfield, NSW 2070, Australia
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145
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Randeniya LK, Shi H, Barnard AS, Fang J, Martin PJ, Ostrikov KK. Harnessing the influence of reactive edges and defects of graphene substrates for achieving complete cycle of room-temperature molecular sensing. Small 2013; 9:3993-3999. [PMID: 23813883 DOI: 10.1002/smll.201300689] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 04/07/2013] [Indexed: 06/02/2023]
Abstract
Molecular doping and detection are at the forefront of graphene research, a topic of great interest in physical and materials science. Molecules adsorb strongly on graphene, leading to a change in electrical conductivity at room temperature. However, a common impediment for practical applications reported by all studies to date is the excessively slow rate of desorption of important reactive gases such as ammonia and nitrogen dioxide. Annealing at high temperatures, or exposure to strong ultraviolet light under vacuum, is employed to facilitate desorption of these gases. In this article, the molecules adsorbed on graphene nanoflakes and on chemically derived graphene-nanomesh flakes are displaced rapidly at room temperature in air by the use of gaseous polar molecules such as water and ethanol. The mechanism for desorption is proposed to arise from the electrostatic forces exerted by the polar molecules, which decouples the overlap between substrate defect states, molecule states, and graphene states near the Fermi level. Using chemiresistors prepared from water-based dispersions of single-layer graphene on mesoporous alumina membranes, the study further shows that the edges of the graphene flakes (showing p-type responses to NO₂ and NH₃) and the edges of graphene nanomesh structures (showing n-type responses to NO₂ and NH₃) have enhanced sensitivity. The measured responses towards gases are comparable to or better than those which have been obtained using devices that are more sophisticated. The higher sensitivity and rapid regeneration of the sensor at room temperature provides a clear advancement towards practical molecule detection using graphene-based materials.
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Affiliation(s)
- Lakshman K Randeniya
- CSIRO Materials Science and Engineering, PO Box 218, Lindfield, NSW 2070, Australia.
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146
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Seo DH, Rider AE, Han ZJ, Kumar S, Ostrikov KK. Plasma break-down and re-build: same functional vertical graphenes from diverse natural precursors. Adv Mater 2013; 25:5638-5642. [PMID: 24002820 DOI: 10.1002/adma201301510] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Revised: 06/28/2013] [Indexed: 06/02/2023]
Abstract
Plasmas, the 4(th) state of matter, uniformly transform natural precursors with different chemical composition in solid, liquid, and gas states into the same functional vertical graphenes in a single-step process within a few minutes. Functional vertical graphenes show reliable biosensing properties, strong binding with proteins, and improved adhesion to substrates.
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Affiliation(s)
- Dong Han Seo
- Plasma Nanoscience, CSIRO Materials Science and Engineering, P.O. Box 218, Lindfield, NSW, 2070, Australia; Plasma Nanoscience @ Complex Systems, School of Physics, University of Sydney, NSW, 2006, Australia
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147
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Yue Z, Levchenko I, Kumar S, Seo D, Wang X, Dou S, Ostrikov KK. Large networks of vertical multi-layer graphenes with morphology-tunable magnetoresistance. Nanoscale 2013; 5:9283-9288. [PMID: 23603856 DOI: 10.1039/c3nr00550j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
We report on the comparative study of magnetotransport properties of large-area vertical few-layer graphene networks with different morphologies, measured in a strong (up to 10 T) magnetic field over a wide temperature range. The petal-like and tree-like graphene networks grown by a plasma enhanced CVD process on a thin (500 nm) silicon oxide layer supported by a silicon wafer demonstrate a significant difference in the resistance-magnetic field dependencies at temperatures ranging from 2 to 200 K. This behaviour is explained in terms of the effect of electron scattering at ultra-long reactive edges and ultra-dense boundaries of the graphene nanowalls. Our results pave a way towards three-dimensional vertical graphene-based magnetoelectronic nanodevices with morphology-tuneable anisotropic magnetic properties.
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Affiliation(s)
- Zengji Yue
- Institute for Superconducting and Electronic Materials (ISEM), Faculty of Engineering, University of Wollongong, NSW 2522, Australia.
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148
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Ishaq M, Evans MM, Ostrikov KK. Effect of atmospheric gas plasmas on cancer cell signaling. Int J Cancer 2013; 134:1517-28. [PMID: 23754175 DOI: 10.1002/ijc.28323] [Citation(s) in RCA: 137] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2013] [Accepted: 05/24/2013] [Indexed: 12/11/2022]
Abstract
Cancer is one of the most life-threatening diseases with many forms still regarded as incurable. The conventional cancer treatments have unwanted side effects such as the death of normal cells. A therapy that can accurately target and effectively kill tumor cells could address the inadequacies of the available therapies. Atmospheric gas plasmas (AGP) that are able to specifically kill cancerous cells offer a promising alternative approach compared to conventional therapies. AGP have been shown to exploit tumor-specific genetic defects and a recent trial in mice has confirmed its antitumor effects. The mechanism by which the AGP act on tumor cells but not normal cells is not fully understood. A review of the current literature suggests that reactive oxygen species (ROS) generated by AGP induce death of cancer cells by impairing the function of intracellular regulatory factors. The majority of cancer cells are defective in tumor suppressors that interfere normal cell growth pathways. It appears that pro-oncogene or tumor suppressor-dependent regulation of antioxidant/or ROS signaling pathways may be involved in AGP-induced cancer cell death. The toxic effects of ROS are mitigated by normal cells by adjustment of their metabolic pathways. On the other hand, tumor cells are mostly defective in several regulatory signaling pathways which lead to the loss of metabolic balance within the cells and consequently, the regulation of cell growth. This review article evaluates the impact of AGP on the activation of cellular signaling and its importance for exploring mechanisms for safe and efficient anticancer therapies.
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Affiliation(s)
- Musarat Ishaq
- Plasma Nanomedicine CSIRO Materials Science and Engineering, North Ryde, PO Box 52, NSW 1670, Australia; Plasma Nanoscience, CSIRO Materials Science and Engineering, PO Box 218, Lindfield 2070, NSW, Australia
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149
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Kumar S, Mehdipour H, Ostrikov KK. Plasma-enabled graded nanotube biosensing arrays on a Si nanodevice platform: catalyst-free integration and in situ detection of nucleation events. Adv Mater 2013; 25:69-74. [PMID: 23108975 DOI: 10.1002/adma.201203163] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/02/2012] [Revised: 09/28/2012] [Indexed: 06/01/2023]
Abstract
Low-temperature plasmas in direct contact with arbitrary, written linear features on a Si wafer enable catalyst-free integration of carbon nanotubes into a Si-based nanodevice platform and in situ resolution of individual nucleation events. The graded nanotube arrays show reliable, reproducible, and competitive performance in electron field emission and biosensing nanodevices.
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Affiliation(s)
- Shailesh Kumar
- Plasma Nanoscience Centre Australia, CSIRO Materials Science and Engineering, Lindfield, NSW, Australia
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150
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Mehdipour H, Ostrikov KK. Kinetics of low-pressure, low-temperature graphene growth: toward single-layer, single-crystalline structure. ACS Nano 2012; 6:10276-10286. [PMID: 23083303 DOI: 10.1021/nn3041446] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Graphene grown on metal catalysts with low carbon solubility is a highly competitive alternative to exfoliated and other forms of graphene, yet a single-layer, single-crystal structure remains a challenge because of the large number of randomly oriented nuclei that form grain boundaries when stitched together. A kinetic model of graphene nucleation and growth is developed to elucidate the effective controls of the graphene island density and surface coverage from the onset of nucleation to the full monolayer formation in low-pressure, low-temperature CVD. The model unprecedentedly involves the complete cycle of the elementary gas-phase and surface processes and shows a precise quantitative agreement with the recent low-energy electron diffraction measurements and also explains numerous parameter trends from a host of experimental reports. These agreements are demonstrated for a broad pressure range as well as different combinations of precursor gases and supporting catalysts. The critical role of hydrogen in controlling the graphene nucleation and monolayer formation is revealed and quantified. The model is generic and can be extended to even broader ranges of catalysts and precursor gases/pressures to enable the as yet elusive effective control of the crystalline structure and number of layers of graphene using the minimum amounts of matter and energy.
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Affiliation(s)
- Hamid Mehdipour
- CSIRO Materials Science and Engineering, Plasma Nanoscience Centre Australia (PNCA), P.O. Box 218, Lindfield, New South Wales 2070, Australia
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