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Sun J, Dai L, Lv K, Wen Z, Li Y, Yang D, Yan H, Liu X, Liu C, Li MC. Recent advances in nanomaterial-stabilized pickering foam: Mechanism, classification, properties, and applications. Adv Colloid Interface Sci 2024; 328:103177. [PMID: 38759448 DOI: 10.1016/j.cis.2024.103177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Revised: 04/07/2024] [Accepted: 05/03/2024] [Indexed: 05/19/2024]
Abstract
Pickering foam is a type of foam stabilized by solid particles known as Pickering stabilizers. These solid stabilizers adsorb at the liquid-gas interface, providing superior stability to the foam. Because of its high stability, controllability, versatility, and minimal environmental impact, nanomaterial-stabilized Pickering foam has opened up new possibilities and development prospects for foam applications. This review provides an overview of the current state of development of Pickering foam stabilized by a wide range of nanomaterials, including cellulose nanomaterials, chitin nanomaterials, silica nanoparticles, protein nanoparticles, clay mineral, carbon nanotubes, calcium carbonate nanoparticles, MXene, and graphene oxide nanosheets. Particularly, the preparation and surface modification methods of various nanoparticles, the fundamental properties of nanomaterial-stabilized Pickering foam, and the synergistic effects between nanoparticles and surfactants, functional polymers, and other additives are systematically introduced. In addition, the latest progress in the application of nanomaterial-stabilized Pickering foam in the oil industry, food industry, porous functional material, and foam flotation field is highlighted. Finally, the future prospects of nanomaterial-stabilized Pickering foam in different fields, along with directions for further research and development directions, are outlined.
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Affiliation(s)
- Jinsheng Sun
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, China; Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao, Shandong 266580, China
| | - Liyao Dai
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Kaihe Lv
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, China; Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao, Shandong 266580, China
| | - Zhibo Wen
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Yecheng Li
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Dongqing Yang
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Hao Yan
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, China
| | - Xinyue Liu
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Chaozheng Liu
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China
| | - Mei-Chun Li
- School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, China; Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China; Key Laboratory of Unconventional Oil & Gas Development (China University of Petroleum (East China)), Ministry of Education, Qingdao, Shandong 266580, China.
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Hettler S, Furqan M, Arenal R. Support-Based Transfer and Contacting of Individual Nanomaterials for In Situ Nanoscale Investigations. SMALL METHODS 2024:e2400034. [PMID: 38470226 DOI: 10.1002/smtd.202400034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 02/22/2024] [Indexed: 03/13/2024]
Abstract
Although in situ transmission electron microscopy (TEM) of nanomaterials has been gaining importance in recent years, difficulties in sample preparation have limited the number of studies on electrical properties. Here, a support-based preparation method of individual 1D and 2D materials is presented, which yields a reproducible sample transfer for electrical investigation by in situ TEM. A mechanically rigid support grid facilitates the transfer and contacting to in situ chips by focused ion beam with minimum damage and contamination. The transfer quality is assessed by exemplary specimens of different nanomaterials, including a monolayer of WS2 . Possible studies concern the interplay between structural properties and electrical characteristics on the individual nanomaterial level as well as failure analysis under electrical current or studies of electromigration, Joule heating, and related effects. The TEM measurements can be enriched by additional correlative microscopy and spectroscopy carried out on the identical object with techniques that allow a characterization with a spatial resolution in the range of a few microns. Although developed for in situ TEM, the present transfer method is also applicable to transferring nanomaterials to similar chips for performing further studies or even for using them in potential electrical/optoelectronic/sensing devices.
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Affiliation(s)
- Simon Hettler
- Laboratorio de Microscopías Avanzadas (LMA), Universidad de Zaragoza, Zaragoza, 50018, Spain
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Zaragoza, 50009, Spain
| | - Mohammad Furqan
- Laboratorio de Microscopías Avanzadas (LMA), Universidad de Zaragoza, Zaragoza, 50018, Spain
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Zaragoza, 50009, Spain
| | - Raul Arenal
- Laboratorio de Microscopías Avanzadas (LMA), Universidad de Zaragoza, Zaragoza, 50018, Spain
- Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-Universidad de Zaragoza, Zaragoza, 50009, Spain
- ARAID Foundation, Zaragoza, 50018, Spain
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Choi JS, Lim SH, Lingamdinne LP, Park SY, Koduru JR, Yang JK, Chang YY. Development of ultra-high surface area polyaniline-based activated carbon for the removal of volatile organic compounds from industrial effluents. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2023; 337:122594. [PMID: 37742866 DOI: 10.1016/j.envpol.2023.122594] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2023] [Revised: 06/19/2023] [Accepted: 09/19/2023] [Indexed: 09/26/2023]
Abstract
Removing volatile organic compounds (VOCs) from aqueous solutions is critical for reducing VOC emissions in the environment. Activated carbons are widely used for removal of VOCs from water. However, they show less application feasibility and low removal due to less surface area. Here, a cost-effective and high surface area activated carbonized polyaniline (ACP) was synthesized to sustainable removal of VOCs from water. The ACP microstructure, surface properties, and pore structure were investigated using Brunauer-Emmett-Teller (BET) theory, Scanning Electron Microscopy (SEM), and Transmission Electron Microscopy (TEM). The specific surface area of ACP6:1 (2988.13 m2/g) was greater than that of commercial activated carbon (PAC) (1094.49 m2/g), indicating that it has excellent VOC adsorption capacity. The effects of pH, initial VOC concentration, time, temperature, and ionic strength were studied. According to kinetic and thermodynamic studies on VOCs adsorption, it is an exothermic and spontaneous process involving rate-limiting kinetics. Adsorption isotherms follow the Freundlich isotherm model, suggesting that the adsorbent surface is heterogeneous with multilayer adsorption and maximum ACP adsorption capacities of 1913.9, 2453.3, 1635.8, and 3327.0 mg/g at 293 K for benzene, toluene, ethylbenzene, and perchloroethylene, respectively, representing a 3- to 5-fold improvement over PAC. ACP is a promising adsorbent with a high adsorption efficiency for VOC removal.
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Affiliation(s)
- Jong-Soo Choi
- Department of Environmental Engineering, Kwangwoon University, Seoul, 01897, Republic of Korea
| | - Seon-Hwa Lim
- Department of Environmental Engineering, Kwangwoon University, Seoul, 01897, Republic of Korea
| | | | - Se-Yeon Park
- Department of Environmental Engineering, Kwangwoon University, Seoul, 01897, Republic of Korea
| | - Janardhan Reddy Koduru
- Department of Environmental Engineering, Kwangwoon University, Seoul, 01897, Republic of Korea.
| | - Jae-Kyu Yang
- Department of Environmental Engineering, Kwangwoon University, Seoul, 01897, Republic of Korea
| | - Yoon-Young Chang
- Department of Environmental Engineering, Kwangwoon University, Seoul, 01897, Republic of Korea.
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Tian H, Ma Y, Li Z, Cheng M, Ning S, Han E, Xu M, Zhang PF, Zhao K, Li R, Zou Y, Liao P, Yu S, Li X, Wang J, Liu S, Li Y, Huang X, Yao Z, Ding D, Guo J, Huang Y, Lu J, Han Y, Wang Z, Cheng ZG, Liu J, Xu Z, Liu K, Gao P, Jiang Y, Lin L, Zhao X, Wang L, Bai X, Fu W, Wang JY, Li M, Lei T, Zhang Y, Hou Y, Pei J, Pennycook SJ, Wang E, Chen J, Zhou W, Liu L. Disorder-tuned conductivity in amorphous monolayer carbon. Nature 2023; 615:56-61. [PMID: 36859579 DOI: 10.1038/s41586-022-05617-w] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Accepted: 12/01/2022] [Indexed: 03/03/2023]
Abstract
Correlating atomic configurations-specifically, degree of disorder (DOD)-of an amorphous solid with properties is a long-standing riddle in materials science and condensed matter physics, owing to difficulties in determining precise atomic positions in 3D structures1-5. To this end, 2D systems provide insight to the puzzle by allowing straightforward imaging of all atoms6,7. Direct imaging of amorphous monolayer carbon (AMC) grown by laser-assisted depositions has resolved atomic configurations, supporting the modern crystallite view of vitreous solids over random network theory8. Nevertheless, a causal link between atomic-scale structures and macroscopic properties remains elusive. Here we report facile tuning of DOD and electrical conductivity in AMC films by varying growth temperatures. Specifically, the pyrolysis threshold temperature is the key to growing variable-range-hopping conductive AMC with medium-range order (MRO), whereas increasing the temperature by 25 °C results in AMC losing MRO and becoming electrically insulating, with an increase in sheet resistance of 109 times. Beyond visualizing highly distorted nanocrystallites embedded in a continuous random network, atomic-resolution electron microscopy shows the absence/presence of MRO and temperature-dependent densities of nanocrystallites, two order parameters proposed to fully describe DOD. Numerical calculations establish the conductivity diagram as a function of these two parameters, directly linking microstructures to electrical properties. Our work represents an important step towards understanding the structure-property relationship of amorphous materials at the fundamental level and paves the way to electronic devices using 2D amorphous materials.
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Affiliation(s)
- Huifeng Tian
- School of Materials Science and Engineering, Peking University, Beijing, China
| | - Yinhang Ma
- School of Physical Sciences, CAS Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing, China
| | - Zhenjiang Li
- School of Materials Science and Engineering, Peking University, Beijing, China
| | - Mouyang Cheng
- School of Physics, Peking University, Beijing, China
| | - Shoucong Ning
- Department of Materials Science and Engineering, National University of Singapore, Singapore, Singapore
| | - Erxun Han
- School of Physics, Peking University, Beijing, China
| | - Mingquan Xu
- School of Physical Sciences, CAS Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing, China
| | - Peng-Fei Zhang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
| | - Kexiang Zhao
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
| | - Ruijie Li
- School of Materials Science and Engineering, Peking University, Beijing, China
| | - Yuting Zou
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - PeiChi Liao
- School of Materials Science and Engineering, Peking University, Beijing, China
| | - Shulei Yu
- School of Materials Science and Engineering, Peking University, Beijing, China
| | - Xiaomei Li
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - Jianlin Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
| | - Shizhuo Liu
- School of Materials Science and Engineering, Peking University, Beijing, China
| | - Yifei Li
- School of Materials Science and Engineering, Peking University, Beijing, China
| | - Xinyu Huang
- School of Materials Science and Engineering, Peking University, Beijing, China
- Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing, China
| | - Zhixin Yao
- School of Materials Science and Engineering, Peking University, Beijing, China
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan, China
| | - Dongdong Ding
- School of Physics, Peking University, Beijing, China
| | - Junjie Guo
- Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, Taiyuan, China
| | - Yuan Huang
- Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing, China
| | - Jianming Lu
- School of Physics, Peking University, Beijing, China
| | - Yuyan Han
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, China
| | - Zhaosheng Wang
- Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, China
| | - Zhi Gang Cheng
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
- Songshan Lake Materials Laboratory, Dongguan, China
| | - Junjiang Liu
- Songshan Lake Materials Laboratory, Dongguan, China
| | - Zhi Xu
- Songshan Lake Materials Laboratory, Dongguan, China
| | - Kaihui Liu
- School of Physics, Peking University, Beijing, China
- Songshan Lake Materials Laboratory, Dongguan, China
- Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, Beijing, China
| | - Peng Gao
- Songshan Lake Materials Laboratory, Dongguan, China
- Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, Beijing, China
- International Center for Quantum Materials, Collaborative Innovation Center of Quantum Matter, Peking University, Beijing, China
| | - Ying Jiang
- Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, Beijing, China
- International Center for Quantum Materials, Collaborative Innovation Center of Quantum Matter, Peking University, Beijing, China
| | - Li Lin
- School of Materials Science and Engineering, Peking University, Beijing, China
| | - Xiaoxu Zhao
- School of Materials Science and Engineering, Peking University, Beijing, China
| | - Lifen Wang
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
- Songshan Lake Materials Laboratory, Dongguan, China
| | - Xuedong Bai
- Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing, China
- Songshan Lake Materials Laboratory, Dongguan, China
| | - Wangyang Fu
- School of Materials Science and Engineering, Tsinghua University, Beijing, China
| | - Jie-Yu Wang
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
| | - Maozhi Li
- Department of Physics, Beijing Key Laboratory of Opto-electronic Functional Materials and Micro-Nano Devices, Renmin University of China, Beijing, China
| | - Ting Lei
- School of Materials Science and Engineering, Peking University, Beijing, China
| | - Yanfeng Zhang
- School of Materials Science and Engineering, Peking University, Beijing, China
| | - Yanglong Hou
- School of Materials Science and Engineering, Peking University, Beijing, China
| | - Jian Pei
- Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, China
| | - Stephen J Pennycook
- School of Physical Sciences, CAS Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing, China
- Department of Materials Science and Engineering, National University of Singapore, Singapore, Singapore
| | - Enge Wang
- Songshan Lake Materials Laboratory, Dongguan, China
- Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, Beijing, China
- International Center for Quantum Materials, Collaborative Innovation Center of Quantum Matter, Peking University, Beijing, China
- School of Physics, Liaoning University, Shenyang, China
| | - Ji Chen
- School of Physics, Peking University, Beijing, China.
- Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, Beijing, China.
- Frontiers Science Center for Nano-Optoelectronics, Peking University, Beijing, China.
| | - Wu Zhou
- School of Physical Sciences, CAS Key Laboratory of Vacuum Physics, University of Chinese Academy of Sciences, Beijing, China.
- CAS Center for Excellence in Topological Quantum Computation, University of Chinese Academy of Sciences, Beijing, China.
| | - Lei Liu
- School of Materials Science and Engineering, Peking University, Beijing, China.
- Interdisciplinary Institute of Light-Element Quantum Materials and Research Center for Light-Element Advanced Materials, Peking University, Beijing, China.
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Batra NM, Mahalingam DK, Doggali P, Nunes SP, Costa PMFJ. Investigating the thermal stability of metallic and non-metallic nanoparticles using a novel graphene oxide-based transmission electron microscopy heating-membrane. NANOTECHNOLOGY 2022; 33:255701. [PMID: 35148519 DOI: 10.1088/1361-6528/ac547c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 02/11/2022] [Indexed: 06/14/2023]
Abstract
In recent years, graphene has been explored as a heating membrane for studying high-temperature dynamics inside the transmission electron microscope (TEM) due to several limitations with the existing silicon nitride-based membrane. However, the transfer of monolayer graphene films for TEM experiments is challenging and requires many complicated steps with a minimum success rate. This work developed a novelin situheating platform by combining the graphene oxide (GO) flakes in the pre-patterned chips. The isolated GO flake was self-suspended between the metal electrodes by a simple drop-casting process. The GO was reduced and characterized using Raman and electron energy-loss spectroscopy. Furthermore, a GO-based heater was used to investigate the thermal stability of gold and silica nanoparticles. The gold nanoparticles evaporated non-uniformly and left an empty carbon shell, while silica disappeared uniformly by etching carbon support. We successfully demonstrated a GO flake as a heating membrane to study high temperature thermal dynamic reactions: melting/evaporation, agglomeration, Rayleigh instability, and formation/or removal of carbon in the nanoparticles.
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Affiliation(s)
- Nitin M Batra
- Physical Science and Engineering (PSE) Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
- Institut Des Materiaux Jean Rouxel, CNRS-University of Nantes, Nantes 44300, France
| | - Dinesh K Mahalingam
- Biological and Environmental Science and Engineering (BESE) Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Pradeep Doggali
- KAUST Catalyst Center (KCC), King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Suzana P Nunes
- Biological and Environmental Science and Engineering (BESE) Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
| | - Pedro M F J Costa
- Physical Science and Engineering (PSE) Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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In-situ food spoilage monitoring using a wireless chemical receptor-conjugated graphene electronic nose. Biosens Bioelectron 2021; 200:113908. [PMID: 34972042 DOI: 10.1016/j.bios.2021.113908] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 11/23/2021] [Accepted: 12/20/2021] [Indexed: 11/20/2022]
Abstract
Monitoring food spoilage is one of the most effective methods for preventing food poisoning caused by biogenic amines or microbes. Therefore, various analytical techniques have been introduced to detect low concentrations of cadaverine (CV) and putrescine (PT), which are representative biogenic polyamines involved in food spoilage (5-8 ppm at the stage of initial decomposition after storage for 5 days at 5 °C and 17-186 ppm at the stage of advanced decomposition after storage for 7 days at 5 °C). Although previous methods showed selective CV and PT detection even at low concentrations, the use of these methods remains challenging in research areas that require in-situ, real-time, on-site monitoring. In this study, we demonstrated for the first time an in-situ high-performance chemical receptor-conjugated graphene electronic nose (CRGE-nose) whose limits of detection (LODs), 27.04 and 7.29 ppb, for CV and PT are up to 102 times more sensitive than those of conventional biogenic amine sensors. Specifically, the novel chemical receptors 2,7-bis(3-morpholinopropyl)benzo[lmn][3,8] phenanthroline-1,3,6,8(2H,7H)-tetraone (NaPhdiMor (NPM)) and 2,7-bis(2-((3-morpholinopropyl)amino)ethyl)benzo[lmn][3,8]phenanthroline-1,3,6,8(2H,7H)-tetraone (NaPhdiEtAmMor (NPEAM)) were designed on the basis of density functional theory (DFT) calculations, and their interaction mechanism was characterized by a DFT 3D simulation. Interestingly, the CRGE-nose was connected on a micro sim chip substrate via wire bonding and then integrated into wireless portable devices, resulting in a cost-effective, high-performance prototype CRGE-nose device capable of on-site detection. The portable CRGE-nose can be used for in-situ monitoring of CV and PT concentration changes as low as 27.04 and 7.29 ppb in real meats such as pork, beef, lamb and chicken.
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Siddique AB, Hossain SM, Pramanick AK, Ray M. Excitation dependence and independence of photoluminescence in carbon dots and graphene quantum dots: insights into the mechanism of emission. NANOSCALE 2021; 13:16662-16671. [PMID: 34590646 DOI: 10.1039/d1nr04301c] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Excitation-dependent, multicolor emission from different varieties of 0D carbon systems has attracted immense research attention. It is generally accepted that some variants of 0D carbon exhibit excitation dependent emission, while other variants do not. A third variant exhibits both excitation dependent as well as excitation independent emission. In this work we investigate the structure, composition, steady-state emission-excitation and photoluminescence decay dynamics of three distinctly different variants of 0D carbon - amorphous carbon dots (aCDs), graphene quantum dots (GQDs) and nitrogen-doped GQDs (NGQDs). We find that despite significant differences in the structure and composition there is a striking similarity in the excitation energy dependence of the emission characteristics of these three different dots. All of them exhibit excitation energy independent emission below some threshold wavelength (λth), and above this threshold the emission becomes excitation dependent. We also demonstrate that a similar trend is apparent for nearly all variants of 0D carbon reported in the literature. The threshold wavelength correlates well with the excitation wavelength for the most intense emission and the photoluminescence excitation peaks, suggesting a common origin of light emission in these carbon dots. The findings provide important clues for developing a unified general picture for understanding the light emission mechanism in 0D carbon nanostructures.
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Affiliation(s)
- Abu Bakar Siddique
- Aditya College of Engineering and Technology, Surampalem - 533437, Andhra Pradesh, India
| | - Syed Minhaz Hossain
- Department of Physics, Indian Institute of Engineering Science and Technology, Shibpur, P.O.: Botanic Garden, Howrah, 711103, West Bengal, India
| | | | - Mallar Ray
- School of Engineering and Sciences, Tecnológico de Monterrey, Monterrey, 64849, Nuevo Leon, Mexico.
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Zhao L, Lee T, Ryu S, Oshima Y, Guo Q, Zhang D. Mechanical Robustness of Metal Nanocomposites Rendered by Graphene Functionalization. NANO LETTERS 2021; 21:5706-5713. [PMID: 34213911 DOI: 10.1021/acs.nanolett.1c01438] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nanocarbon materials, such as graphene, carbon nanotubes, and their derivatives, are considered highly effective reinforcing agents in metals. Copious experimental and computational observations suggest that the nature of the interfaces may significantly affect the mechanical behavior of nanocarbon-metal composites, while the exact correlation between the interfacial structure and the deformation and failure mechanisms of the composite remains elusive. Using a nanolaminated graphene-aluminum (Al) composite as the model material, we designed and created composites with distinct interfacial structures and bonding states via graphene functionalization. The mechanical behavior of the composites was strongly affected by the structure of the functionalized graphene (FG)/Al interface, and the optimum strength-ductility synergy came from the composite with the intermediate extent of functionalization. Complementing experimental results with molecular dynamics and phase-field simulation efforts, we interpreted these results by the combined effects of the intrinsic strength of FG nanosheets and the FG/Al interfacial bonding state.
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Affiliation(s)
- Lei Zhao
- State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Taegu Lee
- Department of Mechanical Engineering and KI for the NanoCentury, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Seunghwa Ryu
- Department of Mechanical Engineering and KI for the NanoCentury, Korea Advanced Institute of Science and Technology, Daejeon 34141, Republic of Korea
| | - Yoshifumi Oshima
- School of Materials Science, Japan Advanced Institute of Science and Technology, Nomi, Ishikawa 923-1292, Japan
| | - Qiang Guo
- State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Di Zhang
- State Key Lab of Metal Matrix Composites, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
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Vinoth Kumar SHB, Muydinov R, Szyszka B. Plasma Assisted Reduction of Graphene Oxide Films. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:382. [PMID: 33546135 PMCID: PMC7913195 DOI: 10.3390/nano11020382] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Revised: 01/25/2021] [Accepted: 01/28/2021] [Indexed: 01/16/2023]
Abstract
The past decade has seen enormous efforts in the investigation and development of reduced graphene oxide (GO) and its applications. Reduced graphene oxide (rGO) derived from GO is known to have relatively inferior electronic characteristics when compared to pristine graphene. Yet, it has its significance attributed to high-yield production from inexpensive graphite, ease of fabrication with solution processing, and thus a high potential for large-scale applications and commercialization. Amongst several available approaches for GO reduction, the mature use of plasma technologies is noteworthy. Plasma technologies credited with unique merits are well established in the field of nanotechnology and find applications across several fields. The use of plasma techniques for GO development could speed up the pathway to commercialization. In this report, we review the state-of-the-art status of plasma techniques used for the reduction of GO-films. The strength of various techniques is highlighted with a summary of the main findings in the literature. An analysis is included through the prism of chemistry and plasma physics.
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Affiliation(s)
- Sri Hari Bharath Vinoth Kumar
- Institute of High-Frequency and Semiconductor System Technologies, Technische Universität Berlin, HFT 5-2, Einsteinufer 25, 10587 Berlin, Germany; (R.M.); (B.S.)
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Lebron YAR, Moreira VR, Drumond GP, Gomes GCF, da Silva MM, Bernardes RDO, Jacob RS, Viana MM, de Vasconcelos CKB, Santos LVDS. Statistical physics modeling and optimization of norfloxacin adsorption onto graphene oxide. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.125534] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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11
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Liu L, Wang J, Oswald S, Hu J, Tang H, Wang J, Yin Y, Lu Q, Liu L, Carbó-Argibay E, Huang S, Dong H, Ma L, Zhu F, Zhu M, Schmidt OG. Decoding of Oxygen Network Distortion in a Layered High-Rate Anode by In Situ Investigation of a Single Microelectrode. ACS NANO 2020; 14:11753-11764. [PMID: 32877171 DOI: 10.1021/acsnano.0c04483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Sluggish conversion reactions severely impair the rate capability for lithium storage, which is the main disadvantage of the conversion-type anode materials. Here, the microplatform based on a single microelectrode is designed and utilized for the fundamental understanding of the conversion reaction. The kinetic-favorable layered structure of the anode material is on-site synthesized in the microplatform. The in situ characterization reveals that introducing an oxygen network distortion in the layered oxide anode effectively circumvents the severe passivation of the electrode material by lithium oxide, thus leading to highly reversible conversion reactions. As a result, the high-rate capability of the conversion-type anode materials is realized. The on-site synthesis strategy is further applied in the large-scale synthesis of nanomaterials for lithium-ion batteries. As such, oxide nanorods with the layered structure are synthesized by a facile chemical strategy, showing high rate performance (574 mAh g-1 at 10 A g-1). This work unveils the beneficial effect of oxygen network distortion in the layered anode for conversion reactions over cycling, thus providing an alternative strategy to enhance the rate capability of conversion-type anodes for lithium storage.
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Affiliation(s)
- Lixiang Liu
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
- Material Systems for Nanoelectronics, Technische Universität Chemnitz, 09107 Chemnitz, Germany
- Center for Materials, Architectures, and Integration of Nanomembranes (MAIN), Technische Universität Chemnitz, 09126 Chemnitz, Germany
| | - Jiawei Wang
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
- Center for Materials, Architectures, and Integration of Nanomembranes (MAIN), Technische Universität Chemnitz, 09126 Chemnitz, Germany
| | - Steffen Oswald
- Institute for Complex Materials, Leibniz IFW Dresden, 01069 Dresden, Germany
| | - Junping Hu
- School of Science, Nanchang Institute of Technology, Nanchang 330099, China
| | - Hongmei Tang
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
| | - Jinhui Wang
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
| | - Yin Yin
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
| | - Qiongqiong Lu
- Institute for Complex Materials, Leibniz IFW Dresden, 01069 Dresden, Germany
| | - Lifeng Liu
- International Iberian Nanotechnology Laboratory, 4715-330 Braga, Portugal
| | | | - Shaozhuan Huang
- Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education, South Central University for Nationalities, Wuhan 430074, China
| | - Haiyun Dong
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
| | - Libo Ma
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
| | - Feng Zhu
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
| | - Minshen Zhu
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
| | - Oliver G Schmidt
- Institute for Integrative Nanosciences, Leibniz IFW Dresden, 01069 Dresden, Germany
- Material Systems for Nanoelectronics, Technische Universität Chemnitz, 09107 Chemnitz, Germany
- Center for Materials, Architectures, and Integration of Nanomembranes (MAIN), Technische Universität Chemnitz, 09126 Chemnitz, Germany
- School of Science, Technische Universität Dresden, 01062 Dresden, Germany
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12
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Li Y, Yang H, Wang F, Huang Y. Superior
anticorrosion
performance of
epoxy‐based
composites with
well‐dispersed
melamine modified graphene oxide. J Appl Polym Sci 2020. [DOI: 10.1002/app.49866] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yue Li
- Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing China
- University of Chinese Academy of Sciences Beijing China
| | - Hui Yang
- Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing China
| | - Fengqi Wang
- Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing China
| | - Yong Huang
- Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing China
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13
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Ning W, Wang Z, Xue Y, Wang X, Li W, Zhang Y, Zhang P, Miao S. Catalytic synergistic effects between Pt nanocrystals and elementary graphite oxides: A new insight detected by Langmuir-Blodgett technique. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2019.124145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Ke J, Zhou H, Liu J, Zhang Z, Duan X, Wang S. Enhanced light-driven water splitting by fast electron transfer in 2D/2D reduced graphene oxide/tungsten trioxide heterojunction with preferential facets. J Colloid Interface Sci 2019; 555:413-422. [DOI: 10.1016/j.jcis.2019.08.008] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 07/03/2019] [Accepted: 08/02/2019] [Indexed: 01/13/2023]
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15
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Bytesnikova Z, Richtera L, Smerkova K, Adam V. Graphene oxide as a tool for antibiotic-resistant gene removal: a review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:20148-20163. [PMID: 31115815 DOI: 10.1007/s11356-019-05283-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/04/2018] [Revised: 04/17/2019] [Accepted: 04/25/2019] [Indexed: 06/09/2023]
Abstract
Environmental pollutants, including antibiotics (ATBs), have become an increasingly common health hazard in the last several decades. Overdose and abuse of ATBs led to the emergence of antibiotic-resistant genes (ARGs), which represent a serious health threat. Moreover, water bodies and reservoirs are places where a wide range of bacterial species with ARGs originate, owing to the strong selective pressure from presence of ATB residues. In this regard, graphene oxide (GO) has been utilised in several fields including remediation of the environment. In this review, we present a brief overview of resistant genes of frequently used ATBs, their occurrence in the environment and their behaviour. Further, we discussed the factors influencing the binding of nucleic acids and the response of ARGs to GO, including the presence of salts in the water environment or water pH, because of intrinsic properties of GO of not only binding to nucleic acids but also catalysing their decomposition. This would be helpful in designing new types of water treatment facilities.
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Affiliation(s)
- Zuzana Bytesnikova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic
- Central European Institute of Technology, Brno University of Technology, Purkynova 656/123, 612 00, Brno, Czech Republic
| | - Lukas Richtera
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic.
- Central European Institute of Technology, Brno University of Technology, Purkynova 656/123, 612 00, Brno, Czech Republic.
| | - Kristyna Smerkova
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic
- Central European Institute of Technology, Brno University of Technology, Purkynova 656/123, 612 00, Brno, Czech Republic
| | - Vojtech Adam
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, 613 00, Brno, Czech Republic
- Central European Institute of Technology, Brno University of Technology, Purkynova 656/123, 612 00, Brno, Czech Republic
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16
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Sengupta B, Coleman J, Johnson J, Feng M. Graphene oxide as selective transporter of flavonols for physiological target DNA: A two-color fluorescence approach. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2019; 214:192-198. [PMID: 30776721 PMCID: PMC6869337 DOI: 10.1016/j.saa.2019.02.029] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2018] [Revised: 01/17/2019] [Accepted: 02/11/2019] [Indexed: 06/09/2023]
Abstract
Our study determines the selectivity of graphene oxide (GO) to recognize its ligands (e.g. flavonoids) in facilitating the binding with their respective cellular targets. The polyhydroxy phenolic compounds, flavonoids, have a broad spectrum of therapeutic activities with high potency and low systemic toxicity. Despite the vast medicinal importance, their bioavailability is low. In this exploratory study, GO has been used as the transporter of three flavonols fisetin (3, 7, 3', 4'-OH flavone), quercetin (3, 5, 7, 3', 4'-OH flavone), and morin (3, 5, 7, 2', 4'-OH flavone) for the physiological target DNA. Calf thymus DNA is chosen as the model physiological target. Characterization of GO is performed using FTIR, Raman and dynamic light scattering (DLS) spectroscopy. The strong absorption peak at 1730 cm-1 indicated the presence of carbonyl groups (C=O) at the edges of GO. The presence of sp3 carbons due to oxidation of sp2 carbons in GO is further proved by Raman spectroscopy. DLS provided the average size of the GO particles to be ~9 μm. The dual luminescence behavior of the flavonols has been used in this study for the noninvasive sensing of the GO-flavonol and GO-flavonol-DNA interactions; as well as for the selectivity of GO for one flavonol over other in transferring the ligand to DNA. Furthermore, circular dichroism (CD) indicated that the optical activity of GO undergoes drastic change when conjugated with flavonols. Molecular modeling corroborated the findings from the binding studies. GO provides high promise as facilitators for drug delivery.
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Affiliation(s)
- Bidisha Sengupta
- Department of Chemistry, Tougaloo College, 500 West County Line Road, Tougaloo, MS 39174, USA.
| | - Justin Coleman
- Department of Chemistry, Tougaloo College, 500 West County Line Road, Tougaloo, MS 39174, USA
| | - John Johnson
- Department of Chemistry, Tougaloo College, 500 West County Line Road, Tougaloo, MS 39174, USA
| | - Manliang Feng
- Department of Chemistry, Tougaloo College, 500 West County Line Road, Tougaloo, MS 39174, USA
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17
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Zhang X, Shi C, Liu E, Zhao N, He C. Effect of Interface Structure on the Mechanical Properties of Graphene Nanosheets Reinforced Copper Matrix Composites. ACS APPLIED MATERIALS & INTERFACES 2018; 10:37586-37601. [PMID: 30299931 DOI: 10.1021/acsami.8b09799] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Currently, seldom studies have paid close attention to the impact of the defects and oxygen-containing functional groups on the surface of the graphene for composite applications. In this work, two typical graphene materials, namely graphene nanosheets synthesized by an in situ catalytic reaction and reduced graphene oxide (RGO), were adopted to fabricate reinforced copper matrix composites by spark plasma sintering. A harmful transitional interfacial layer made up of Cu/CuOx/amorphous carbon/RGO, resulted from interfacial reaction between Cu and RGO, were observed in the RGO/Cu composite. In contrast, the in situ synthesized graphene with fewer defect and lower oxygen level can realize clean graphene-Cu interface with Cu-O-C bonding and thus lead to much improved interface bonding and superior yield strength and tensile ductility. These results imply that the in situ synthesized graphene is more favorable for achievement of robust interfacial bonding for enhancing the mechanical properties of the graphene-Cu composites.
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Affiliation(s)
- Xiang Zhang
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials , Tianjin University , Tianjin 300072 , P. R. China
| | - Chunsheng Shi
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials , Tianjin University , Tianjin 300072 , P. R. China
| | - Enzuo Liu
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials , Tianjin University , Tianjin 300072 , P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072 , China
| | - Naiqin Zhao
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials , Tianjin University , Tianjin 300072 , P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072 , China
| | - Chunnian He
- School of Materials Science and Engineering and Tianjin Key Laboratory of Composites and Functional Materials , Tianjin University , Tianjin 300072 , P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072 , China
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18
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Vulcu A, Biris AR, Borodi G, Berghian-Grosan C. Interference of ascorbic and uric acids on dopamine behavior at graphene composite surface: An electrochemical, spectroscopic and theoretical approach. Electrochim Acta 2018. [DOI: 10.1016/j.electacta.2018.06.122] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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19
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Kim S, Jung HJ, Kim JC, Lee KS, Park SS, Dravid VP, He K, Jeong HY. In Situ Observation of Resistive Switching in an Asymmetric Graphene Oxide Bilayer Structure. ACS NANO 2018; 12:7335-7342. [PMID: 29985600 DOI: 10.1021/acsnano.8b03806] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Graphene oxide decorated with oxygen functional groups is a promising candidate as an active layer in resistive switching devices due to its controllable physical-chemical properties, high flexibility, and transparency. However, the origin of conductive channels and their growth dynamics remain a major challenge. We use in situ transmission electron microscopy techniques to demonstrate that nanoscale graphene oxide sheets bonded with oxygen dynamically change their physical and chemical structures upon an applied electric field. Artificially engineered bilayer reduced graphene oxide films with asymmetric oxygen content exhibit nonvolatile write-once-read-many memory behaviors without experiencing the bubble destruction due to the efficient migration of oxygen ions. We clearly observe that a conductive graphitic channel with a conical shape evolves from the upper oxygen-rich region to the lower oxygen-poor region. These findings provide fundamental guidance for understanding the oxygen motions of oxygen-containing carbon materials for future carbon-based nanoelectronics.
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Affiliation(s)
- Sungkyu Kim
- Department of Materials Science and Engineering and NUANCE Center , Northwestern University , Evanston , Illinois 60208 , United States
- Department of Materials Science and Engineering , Clemson University , Clemson , South Carolina 29634 , United States
| | - Hee Joon Jung
- Department of Materials Science and Engineering and NUANCE Center , Northwestern University , Evanston , Illinois 60208 , United States
- International Institute of Nanotechnology, Evanston , Illinois 60208 , United States
| | - Jong Chan Kim
- School of Materials Science and Engineering , UNIST , Ulsan 44919 , Republic of Korea
| | - Kyung-Sun Lee
- UNIST Central Research Facilities (UCRF) , UNIST , Ulsan 44919 , Republic of Korea
| | - Sung Soo Park
- School of Materials Science and Engineering , UNIST , Ulsan 44919 , Republic of Korea
| | - Vinayak P Dravid
- Department of Materials Science and Engineering and NUANCE Center , Northwestern University , Evanston , Illinois 60208 , United States
- International Institute of Nanotechnology, Evanston , Illinois 60208 , United States
| | - Kai He
- Department of Materials Science and Engineering and NUANCE Center , Northwestern University , Evanston , Illinois 60208 , United States
- Department of Materials Science and Engineering , Clemson University , Clemson , South Carolina 29634 , United States
| | - Hu Young Jeong
- School of Materials Science and Engineering , UNIST , Ulsan 44919 , Republic of Korea
- UNIST Central Research Facilities (UCRF) , UNIST , Ulsan 44919 , Republic of Korea
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20
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Tamburri E, Carcione R, Politi S, Angjellari M, Lazzarini L, Vanzetti LE, Macis S, Pepponi G, Terranova ML. Shungite Carbon as Unexpected Natural Source of Few-Layer Graphene Platelets in a Low Oxidation State. Inorg Chem 2018; 57:8487-8498. [PMID: 29969022 DOI: 10.1021/acs.inorgchem.8b01164] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The paper reports on the feasibility of obtaining graphene nanomaterials with remarkable structural and chemical features from shungite rocks. The investigation of the composition and structural modifications induced in the pristine, natural C-containing mineraloid by a specifically designed physicochemical purification treatment is performed by a combined use of several techniques (scanning electron microscopy, high resolution transmission electron microscopy, X-ray diffraction, Raman and X-ray photoelectron spectroscopies). The adopted material processing enables efficient extraction of the C phase in the form of thin polycrystalline platelets of a few hundred nanometers sizes, and formed by 6-10 graphene sheets. About 80% of such nanostructures are characterized by a regular sp2 C honeycomb lattice and an ordered stacking of graphene layers with a d-spacing of ∼0.34 nm. The low oxygen content (∼5%), mainly found in the form of hydroxyl functional groups, provides the graphene platelets (GP) with a chemistry strictly close to that of conventional rGO materials. Such a feature is supported by the high conductivity value of 1.041 × 103 S cm-1 found for pelletized GP, which can be considered a valuable active material for a wide spectrum of advanced applications.
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Affiliation(s)
| | | | | | | | - Laura Lazzarini
- IMEM-CNR , Parco Area delle Scienze 37/A, Località Fontanini , Parma , Italy
| | | | | | - Giancarlo Pepponi
- MNF, CMM, Fondazione Bruno Kessler , via Sommarive 18 , Trento , Italy
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21
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Siddique AB, Pramanick AK, Chatterjee S, Ray M. Amorphous Carbon Dots and their Remarkable Ability to Detect 2,4,6-Trinitrophenol. Sci Rep 2018; 8:9770. [PMID: 29950660 PMCID: PMC6021439 DOI: 10.1038/s41598-018-28021-9] [Citation(s) in RCA: 86] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2018] [Accepted: 05/11/2018] [Indexed: 01/17/2023] Open
Abstract
Apparently mundane, amorphous nanostructures of carbon have optical properties which are as exotic as their crystalline counterparts. In this work we demonstrate a simple and inexpensive mechano-chemical method to prepare bulk quantities of self-passivated, amorphous carbon dots. Like the graphene quantum dots, the water soluble, amorphous carbon dots too, exhibit excitation-dependent photoluminescence with very high quantum yield (~40%). The origin and nature of luminescence in these high entropy nanostructures are well understood in terms of the abundant surface traps. The photoluminescence property of these carbon dots is exploited to detect trace amounts of the nitro-aromatic explosive - 2,4,6-trinitrophenol (TNP). The benign nanostructures can selectively detect TNP over a wide range of concentrations (0.5 to 200 µM) simply by visual inspection, with a detection limit of 0.2 µM, and consequently outperform nearly all reported TNP sensor materials.
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Affiliation(s)
- Abu Bakar Siddique
- Dr. M. N. Dastur School of Materials Science and Engineering, Indian Institute of Engineering Science and Technology, Shibpur, PO. Botanic Garden, Howrah, 711103, India
| | - Ashit Kumar Pramanick
- Materials Science Division, CSIR-National Metallurgical Laboratory, Jamshedpur, 831007, India
| | - Subrata Chatterjee
- Dr. M. N. Dastur School of Materials Science and Engineering, Indian Institute of Engineering Science and Technology, Shibpur, PO. Botanic Garden, Howrah, 711103, India
| | - Mallar Ray
- Dr. M. N. Dastur School of Materials Science and Engineering, Indian Institute of Engineering Science and Technology, Shibpur, PO. Botanic Garden, Howrah, 711103, India.
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22
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Graphene oxide: An efficient material and recent approach for biotechnological and biomedical applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018. [DOI: 10.1016/j.msec.2018.01.004] [Citation(s) in RCA: 164] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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23
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Fei L, Xu M, Jiang J, Ng SM, Shu L, Sun L, Xie K, Huang H, Leung CW, Mak CL, Wang Y. Three-dimensional macroporous graphene monoliths with entrapped MoS2nanoflakes from single-step synthesis for high-performance sodium-ion batteries. RSC Adv 2018; 8:2477-2484. [PMID: 35541460 PMCID: PMC9077459 DOI: 10.1039/c7ra12617d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 12/30/2017] [Indexed: 01/24/2023] Open
Abstract
Layered metal sulfides (MoS2, WS2, SnS2, and SnS) offer high potential as advanced anode materials in sodium ion batteries upon integration with highly-conductive graphene materials. However, in addition to being costly and time-consuming, existing strategies for synthesizing sulfides/graphene composites often involve complicated procedures. It is therefore essential to develop a simple yet scalable pathway to construct sulfide/graphene composites for practical applications. Here, we highlight a one-step, template-free, high-throughput “self-bubbling” method for producing MoS2/graphene composites, which is suitable for large-scale production of sulfide/graphene composites. The final product featured MoS2 nanoflakes distributed in three-dimensional macroporous monolithic graphene. Moreover, this unique MoS2/graphene composite achieved remarkable electrochemical performance when being applied to Na-ion battery anodes; namely, excellent cycling stability (474 mA h g−1 at 0.1 A g−1 after 100 cycles) and high rate capability (406 mA h g−1 at 0.25 A g−1 and 359 mA h g−1 at 0.5 A g−1). This self-bubbling approach should be applicable to delivering other graphene-based composites for emerging applications such as energy storage, catalysis, and sensing. A single-step, template-free, high-throughput synthesis method is developed to produce graphene/MoS2 composites for improved performances in sodium-ion batteries.![]()
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Affiliation(s)
- Linfeng Fei
- Department of Applied Physics
- The Hong Kong Polytechnic University
- China
| | - Ming Xu
- Department of Applied Physics
- The Hong Kong Polytechnic University
- China
- School of Metallurgical and Environment
- Central South University
| | - Juan Jiang
- Department of Applied Physics
- The Hong Kong Polytechnic University
- China
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials
- Hubei University
| | - Sheung Mei Ng
- Department of Applied Physics
- The Hong Kong Polytechnic University
- China
| | - Longlong Shu
- School of Materials Science and Engineering
- Nanchang University
- Nanchang
- China
| | - Li Sun
- Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes
- National Laboratory of Mineral Materials
- School of Materials Science and Technology
- China University of Geosciences
- Beijing 100083
| | - Keyu Xie
- State Key Laboratory of Solidification Processing
- Center for Nano Energy Materials
- Northwestern Polytechnical University and Shaanxi Joint Laboratory of Graphene (NPU)
- Xi'an 710072
- China
| | - Haitao Huang
- Department of Applied Physics
- The Hong Kong Polytechnic University
- China
| | - Chi Wah Leung
- Department of Applied Physics
- The Hong Kong Polytechnic University
- China
| | - Chee Leung Mak
- Department of Applied Physics
- The Hong Kong Polytechnic University
- China
| | - Yu Wang
- School of Materials Science and Engineering
- Nanchang University
- Nanchang
- China
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24
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Maity N, Kuila A, Nandi AK. Deciphering the Effect of Polymer-Assisted Doping on the Optoelectronic Properties of Block Copolymer-Anchored Graphene Oxide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:1460-1470. [PMID: 28110538 DOI: 10.1021/acs.langmuir.6b03923] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Doping facilitates the tuning of band gap, providing an opportunity to tailor the optoelectronic properties of graphene in a simple way, and polymer-assisted doping is a new route to combine the optoelectronic properties of graphene with the properties of a polymer. In this endeavor, a linear diblock copolymer, polycaprolactone-block-poly(dimethyl aminoethyl methacrylate) (PCL13-b-PDMAEMA117) (GPCLD) is grafted from the graphene oxide (GO) surface via consecutive ring opening and atom transfer radical polymerization. GPCLD is characterized using proton nuclear magnetic resonance (1H NMR), Fourier transform infrared spectroscopy, atomic force microscopy, thermogravimetric analysis, X-ray photoelectron spectroscopy, and Raman spectroscopy. The phase transition behavior of the GPCLD solution with varying temperature and pH is monitored using fluorescence spectroscopy and dynamic light scattering. Temperature-dependent 1H NMR spectra at pH 9.2 indicate the influence of temperature on the interaction between GPCLD and solvent (water) molecules causing the phase separation. Fluorescence spectra at pH 4 and 9.2 give the evidence of localized p- and n-type doping of graphene assisted by the pendent PDMAEMA chains. In the impedance spectra of GPCLD films, the Nyquist plots vary with pH; at pH 4, they exhibit a semicircle at higher frequencies and a spike at lower frequencies; at pH 7.0, the spike is replaced by an arc; and at pH 9.2, the semicircle at higher frequencies vanishes and only a spike is noticed, all of these suggesting different types of doping of graphene at different pH values. The dc-conductivity also varies with pH and temperature because of the different types of doping. The current (I)-voltage (V) property of GPCLD at different pH values is very unique: at pH 9.2, an interesting feature of negative differential resistance (NDR) is observed; at pH 7, the rectification property is observed; and at pH 4, again the NDR property is observed. The temperature-dependent I-V property at pH 7 and 9.2 clearly indicates a signature of doping, dedoping, and redoping because of the change in the interaction of GO with the grafted polymer arising from coiling and decoiling of polymer chains.
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Affiliation(s)
- Nabasmita Maity
- Polymer Science Unit, Indian Association for the Cultivation of Science , Jadavpur, Kolkata 700 032, India
| | - Atanu Kuila
- Polymer Science Unit, Indian Association for the Cultivation of Science , Jadavpur, Kolkata 700 032, India
| | - Arun K Nandi
- Polymer Science Unit, Indian Association for the Cultivation of Science , Jadavpur, Kolkata 700 032, India
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25
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Fei L, Ng SM, Lu W, Xu M, Shu L, Zhang WB, Yong Z, Sun T, Lam CH, Leung CW, Mak CL, Wang Y. Atomic-Scale Mechanism on Nucleation and Growth of Mo 2C Nanoparticles Revealed by in Situ Transmission Electron Microscopy. NANO LETTERS 2016; 16:7875-7881. [PMID: 27960485 DOI: 10.1021/acs.nanolett.6b04160] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
With a similar electronic structure as that of platinum, molybdenum carbide (Mo2C) holds significant potential as a high performance catalyst across many chemical reactions. Empirically, the precise control of particle size, shape, and surface nature during synthesis largely determines the catalytic performance of nanoparticles, giving rise to the need of clarifying the underlying growth characteristics in the nucleation and growth of Mo2C. However, the high-temperature annealing involved during the growth of carbides makes it difficult to directly observe and understand the nucleation and growth processes. Here, we report on the use of advanced in situ transmission electron microscopy with atomic resolution to reveal a three-stage mechanism during the growth of Mo2C nanoparticles over a wide temperature range: initial nucleation via a mechanism consistent with spinodal decomposition, subsequent particle coalescence and monomer attachment, and final surface faceting to well-defined particles with minimum surface energy. These microscopic observations made under a heating atmosphere offer new perspectives toward the design of carbide-based catalysts, as well as the tuning of their catalytic performances.
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Affiliation(s)
- Linfeng Fei
- Department of Applied Physics, The Hong Kong Polytechnic University , Hong Kong SAR, China
| | - Sheung Mei Ng
- Department of Applied Physics, The Hong Kong Polytechnic University , Hong Kong SAR, China
| | - Wei Lu
- Department of Applied Physics, The Hong Kong Polytechnic University , Hong Kong SAR, China
| | - Ming Xu
- Department of Applied Physics, The Hong Kong Polytechnic University , Hong Kong SAR, China
| | - Longlong Shu
- School of Materials Science and Engineering, Nanchang University , Nanchang, Jiangxi 330031, China
| | - Wei-Bing Zhang
- Department of Applied Physics, The Hong Kong Polytechnic University , Hong Kong SAR, China
| | - Zehui Yong
- Department of Applied Physics, The Hong Kong Polytechnic University , Hong Kong SAR, China
| | - Tieyu Sun
- Department of Applied Physics, The Hong Kong Polytechnic University , Hong Kong SAR, China
| | - Chi Hang Lam
- Department of Applied Physics, The Hong Kong Polytechnic University , Hong Kong SAR, China
| | - Chi Wah Leung
- Department of Applied Physics, The Hong Kong Polytechnic University , Hong Kong SAR, China
| | - Chee Leung Mak
- Department of Applied Physics, The Hong Kong Polytechnic University , Hong Kong SAR, China
| | - Yu Wang
- School of Materials Science and Engineering, Nanchang University , Nanchang, Jiangxi 330031, China
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Zou W, Li X, Lai Z, Zhang X, Hu X, Zhou Q. Graphene Oxide Inhibits Antibiotic Uptake and Antibiotic Resistance Gene Propagation. ACS APPLIED MATERIALS & INTERFACES 2016; 8:33165-33174. [PMID: 27934199 DOI: 10.1021/acsami.6b09981] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Antibiotics and antibiotic resistance genes (ARGs) in the natural environment have become substantial threats to the ecosystem and public health. Effective strategies to control antibiotics and ARG contaminations are emergent. A novel carbon nanomaterial, graphene oxide (GO), has attracted a substantial amount of attention in environmental fields. This study discovered the inhibition effects of GO on sulfamethoxazole (SMZ) uptake for bacteria and ARG transfer among microorganisms. GO promoted the penetration of SMZ from intracellular to extracellular environments by increasing the cell membrane permeability. In addition, the formation of a GO-SMZ complex reduced the uptake of SMZ in bacteria. Moreover, GO decreased the abundance of the sulI and intI genes by approximately 2-3 orders of magnitude, but the global bacterial activity was not obviously inhibited. A class I integron transfer experiment showed that the transfer frequency was up to 55-fold higher in the control than that of the GO-treated groups. Genetic methylation levels were not significant while sulI gene replication was inhibited. The biological properties of ARGs were altered due to the GO-ARG noncovalent combination, which was confirmed using multiple spectral analyses. This work suggests that GO can potentially be applied for controlling ARG contamination via inhibiting antibiotic uptake and ARG propagation.
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Affiliation(s)
- Wei Zou
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University , Tianjin 300071, China
| | - Xiaokang Li
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University , Tianjin 300071, China
| | - Ziyang Lai
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University , Tianjin 300071, China
| | - Xingli Zhang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University , Tianjin 300071, China
| | - Xiangang Hu
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University , Tianjin 300071, China
| | - Qixing Zhou
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education)/Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University , Tianjin 300071, China
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Gross K, Barragán JJP, Sangiao S, De Teresa JM, Lajaunie L, Arenal R, Calderón HA, Prieto P. Electrical conductivity of oxidized-graphenic nanoplatelets obtained from bamboo: effect of the oxygen content. NANOTECHNOLOGY 2016; 27:365708. [PMID: 27483115 DOI: 10.1088/0957-4484/27/36/365708] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The large-scale production of graphene and reduced-graphene oxide (rGO) requires low-cost and eco-friendly synthesis methods. We employed a new, simple, cost-effective pyrolytic method to synthetize oxidized-graphenic nanoplatelets (OGNP) using bamboo pyroligneous acid (BPA) as a source. Thorough analyses via high-resolution transmission electron microscopy and electron energy-loss spectroscopy provides a complete structural and chemical description at the local scale of these samples. In particular, we found that at the highest carbonization temperature the OGNP-BPA are mainly in a sp(2) bonding configuration (sp(2) fraction of 87%). To determine the electrical properties of single nanoplatelets, these were contacted by Pt nanowires deposited through focused-ion-beam-induced deposition techniques. Increased conductivity by two orders of magnitude is observed as oxygen content decreases from 17% to 5%, reaching a value of 2.3 × 10(3) S m(-1) at the lowest oxygen content. Temperature-dependent conductivity reveals a semiconductor transport behavior, described by the Mott three-dimensional variable range hopping mechanism. From the localization length, we estimate a band-gap value of 0.22(2) eV for an oxygen content of 5%. This investigation demonstrates the great potential of the OGNP-BPA for technological applications, given that their structural and electrical behavior is similar to the highly reduced rGO sheets obtained by more sophisticated conventional synthesis methods.
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Affiliation(s)
- K Gross
- Center of Excellence on Novel Materials, Universidad del Valle, PO Box 25157, Cali, Colombia
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Chen X, Guo H, Wang T, Lu M, Wang T. In-situ fabrication of reduced graphene oxide (rGO)/ZnO heterostructure: surface functional groups induced electrical properties. Electrochim Acta 2016. [DOI: 10.1016/j.electacta.2016.02.201] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Permatasari FA, Aimon AH, Iskandar F, Ogi T, Okuyama K. Role of C-N Configurations in the Photoluminescence of Graphene Quantum Dots Synthesized by a Hydrothermal Route. Sci Rep 2016; 6:21042. [PMID: 26876153 PMCID: PMC4753454 DOI: 10.1038/srep21042] [Citation(s) in RCA: 113] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Accepted: 01/15/2016] [Indexed: 12/24/2022] Open
Abstract
Graphene quantum dots (GQDs) containing N atoms were successfully synthesized using a facile, inexpensive, and environmentally friendly hydrothermal reaction of urea and citric acid, and the effect of the GQDs' C-N configurations on their photoluminescence (PL) properties were investigated. High-resolution transmission electron microscopy (HR-TEM) images confirmed that the dots were spherical, with an average diameter of 2.17 nm. X-ray photoelectron spectroscopy (XPS) analysis indicated that the C-N configurations of the GQDs substantially affected their PL intensity. Increased PL intensity was obtained in areas with greater percentages of pyridinic-N and lower percentages of pyrrolic-N. This enhanced PL was attributed to delocalized π electrons from pyridinic-N contributing to the C system of the GQDs. On the basis of energy electron loss spectroscopy (EELS) and UV-Vis spectroscopy analyses, we propose a PL mechanism for hydrothermally synthesized GQDs.
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Affiliation(s)
- Fitri Aulia Permatasari
- Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung 40132, Indonesia
| | - Akfiny Hasdi Aimon
- Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung 40132, Indonesia
| | - Ferry Iskandar
- Department of Physics, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Bandung 40132, Indonesia
- Research Center for Nanoscience and Nanotechnology, Institut Teknologi Bandung, Bandung 40132, Indonesia
| | - Takashi Ogi
- Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
| | - Kikuo Okuyama
- Department of Chemical Engineering, Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima 739-8527, Japan
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30
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Fei L, Li X, Bi W, Zhuo Z, Wei W, Sun L, Lu W, Wu X, Xie K, Wu C, Chan HLW, Wang Y. Graphene/sulfur hybrid nanosheets from a space-confined "sauna" reaction for high-performance lithium-sulfur batteries. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:5936-5942. [PMID: 26310671 DOI: 10.1002/adma.201502668] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2015] [Revised: 07/07/2015] [Indexed: 06/04/2023]
Abstract
A space-confined "sauna" reaction system is introduced for the simultaneous reduction and functionalization of graphene oxide to unique graphene-sulfur hybrid nanosheets, in which thin layers of amorphous sulfur are tightly anchored on the graphene sheet via strong chemical bonding. Upon being used as the cathode material in lithium-sulfur batteries, the as-synthesized composite shows an excellent electrochemical performance.
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Affiliation(s)
- Linfeng Fei
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China
| | - Xiaogang Li
- Hefei National Laboratory for Physical Sciences at Microscale and iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Wentuan Bi
- Hefei National Laboratory for Physical Sciences at Microscale and iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Zhiwen Zhuo
- CAS Key Lab of Materials for Energy Conversion, Department of Materials Science and Engineering and Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Wenfei Wei
- State Key Laboratory of Solidification Processing and Center for Nano Energy Materials, Northwestern Polytechnical University, Xi'an, Shanxi, 710072, China
| | - Li Sun
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China
| | - Wei Lu
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China
| | - Xiaojun Wu
- CAS Key Lab of Materials for Energy Conversion, Department of Materials Science and Engineering and Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Keyu Xie
- State Key Laboratory of Solidification Processing and Center for Nano Energy Materials, Northwestern Polytechnical University, Xi'an, Shanxi, 710072, China
| | - Changzheng Wu
- Hefei National Laboratory for Physical Sciences at Microscale and iChEM (Collaborative Innovation Center of Chemistry for Energy Materials), University of Science and Technology of China, Hefei, Anhui, 230026, China
| | - Helen L W Chan
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China
| | - Yu Wang
- Department of Applied Physics, The Hong Kong Polytechnic University, Hong Kong, China
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31
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Cai X, Ma R, Ozawa TC, Sakai N, Funatsu A, Sasaki T. Superlattice assembly of graphene oxide (GO) and titania nanosheets: fabrication, in situ photocatalytic reduction of GO and highly improved carrier transport. NANOSCALE 2014; 6:14419-14427. [PMID: 25340970 DOI: 10.1039/c4nr04830j] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Two different kinds of two-dimensional (2D) materials, graphene oxide (GO) and titanium oxide nanosheets (Ti₀.₈₇O2(0.52-)), were self-assembled layer-by-layer using a polycation as a linker into a superlattice film. Successful construction of an alternate molecular assembly was confirmed by atomic force microscopy and UV-visible absorption spectroscopy as well as X-ray diffraction analysis. Exposure of the resulting film to UV light effectively promoted photocatalytic reduction of GO as well as decomposition of the polycation, which are due to their intimate molecular-level contact. The reduction completed within 3 hours, bringing about a decrease of the sheet resistance by ∼10(6). This process provides a clean and mild route to reduced graphene oxide (rGO), showing advantages over other chemical and thermal reduction processes. A field-effect-transistor device was fabricated using the resulting superlattice assembly of rGO/Ti₀.₈₇O₂(0.52-) as a channel material. The rGO in the film was found to work as a unipolar n-type conductor, which is in contrast to ambipolar or unipolar p-type behavior mostly reported for rGO films. This unique property may be associated with the electron doping effect from Ti₀.₈₇O₂(0.52-) nanosheets. A significant improvement in the conductance and electron carrier mobility by more than one order of magnitude was revealed, which may be accounted for by the heteroassembly with Ti₀.₈₇(0.52-) nanosheets with a high dielectric constant as well as the better 2D structure of rGO produced via the soft photocatalytic reduction.
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Affiliation(s)
- Xingke Cai
- International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan.
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32
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Electrochemically reduced graphene oxide multilayer films as efficient counter electrode for dye-sensitized solar cells. Sci Rep 2014; 3:1489. [PMID: 23508212 PMCID: PMC3601371 DOI: 10.1038/srep01489] [Citation(s) in RCA: 123] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Accepted: 02/21/2013] [Indexed: 12/25/2022] Open
Abstract
We report on a new counter electrode for dye-sensitized solar cells (DSCs), which is prepared using layer-by-layer assembly of negatively charged graphene oxide and positively charged poly (diallyldimethylammonium chloride) followed by an electrochemical reduction procedure. The DSC devises using the heteroleptic Ru complex C106TBA as sensitizer and this new counter electrode reach power conversion efficiencies of 9.5% and 7.6% in conjunction with low volatility and solvent free ionic liquid electrolytes, respectively. The new counter electrode exhibits good durability (60°C for 1000 h in a solar simulator, 100 mW cm−2) during the accelerated tests when used in combination with an ionic liquid electrolyte. This work identifies a new class of electro-catalysts with potential for low cost photovoltaic devices.
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33
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Wang X, Sun G, Routh P, Kim DH, Huang W, Chen P. Heteroatom-doped graphene materials: syntheses, properties and applications. Chem Soc Rev 2014; 43:7067-98. [DOI: 10.1039/c4cs00141a] [Citation(s) in RCA: 1297] [Impact Index Per Article: 129.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Heteroatom doping endows graphene with new or improved properties and greatly enhances its potential for various applications.
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Affiliation(s)
- Xuewan Wang
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- , Singapore
| | - Gengzhi Sun
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- , Singapore
| | - Parimal Routh
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- , Singapore
| | - Dong-Hwan Kim
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- , Singapore
| | - Wei Huang
- Singapore-Jiangsu Joint Research Center for Organic/Bio-Electronics and Information Displays & Institute of Advanced Materials (IAM)
- Nanjing Tech University
- Nanjing, China
| | - Peng Chen
- School of Chemical and Biomedical Engineering
- Nanyang Technological University
- , Singapore
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34
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Natan A, Hersam MC, Seideman T. Insights into graphene functionalization by single atom doping. NANOTECHNOLOGY 2013; 24:505715. [PMID: 24285007 DOI: 10.1088/0957-4484/24/50/505715] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Chemical modification of graphene is a common approach to control its electronic properties and hence fabricate electronic devices with new or improved functionalities. In this work we analyze, with density functional based calculations, the effect of chemical adsorption of fluorine atoms at different coverage levels on the electronic structure of graphene. We suggest a simple and general model for the shift of the Fermi level with coverage level and show the trends of the band gap and the Fermi level shift with coverage. We then show that the same model can be applied to explain the Fermi level shift in a different system of nitrogen substitution in graphene. Finally, we analyze the resulting charge transfer patterns and show that they are consistent with the model for the Fermi level shift.
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Affiliation(s)
- Amir Natan
- Department of Physical Electronics, Tel-Aviv University, Tel-Aviv, 69978, Israel. Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
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35
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Craciun MF, Khrapach I, Barnes MD, Russo S. Properties and applications of chemically functionalized graphene. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2013; 25:423201. [PMID: 24045655 DOI: 10.1088/0953-8984/25/42/423201] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The vast and yet largely unexplored family of graphene materials has great potential for future electronic devices with novel functionalities. The ability to engineer the electrical and optical properties in graphene by chemically functionalizing it with a molecule or adatom is widening considerably the potential applications targeted by graphene. Indeed, functionalized graphene has been found to be the best known transparent conductor or a wide gap semiconductor. At the same time, understanding the mechanisms driving the functionalization of graphene with hydrogen is proving to be of fundamental interest for energy storage devices. Here we discuss recent advances on the properties and applications of chemically functionalized graphene.
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Affiliation(s)
- M F Craciun
- Centre for Graphene Science, College of Engineering, Mathematics, and Physical Sciences, University of Exeter, Exeter EX4 4QL, UK
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36
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Zeng L, Wang R, Zhu L, Zhang J. Graphene and CdS nanocomposite: A facile interface for construction of DNA-based electrochemical biosensor and its application to the determination of phenformin. Colloids Surf B Biointerfaces 2013; 110:8-14. [DOI: 10.1016/j.colsurfb.2013.04.025] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 03/22/2013] [Accepted: 04/22/2013] [Indexed: 01/30/2023]
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37
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Rani JR, Oh J, Park JE, Lim J, Park B, Kim K, Kim SJ, Chan Jun S. Controlling the luminescence emission from palladium grafted graphene oxide thin films via reduction. NANOSCALE 2013; 5:5620-5627. [PMID: 23686147 DOI: 10.1039/c3nr00265a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
The role of palladium (Pd) in the reduction of graphene oxide (GO) thin films was investigated using a Pd assisted grafting technique. The structural and optical characteristics of these thin films were obtained from various spectroscopic analyses, which confirmed increased C[double bond, length as m-dash]C-C aromatic ring vibration and oxidation of Pd with Ar annealing. In Pd free GO, annealing of films resulted in restoration of sp(2) clusters; however, Pd grafting with non-annealed film enhanced the possibility of restoration and further annealing dramatically increased the restoration rate with enhanced blue photoluminescence (PL) emission. The blue PL emission originates from sp(2) cluster sites and the yellow-green PL from defect trapped states. As reduction of GO increased, yellow-green emission decreased and blue PL became the prominent emission. These experimental findings open up a new feasible pathway for controlling the luminescence emission from graphene oxide that furthers the technological advancement of graphene based optoelectronic devices.
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Affiliation(s)
- J R Rani
- NEMD Lab., Department of Mechanical Engineering, Yonsei University, Seoul 120 749, Republic of Korea
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38
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Kocabas C, Suzer S. Probing Voltage Drop Variations in Graphene with Photoelectron Spectroscopy. Anal Chem 2013; 85:4172-7. [DOI: 10.1021/ac400489e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Coskun Kocabas
- Department of Physics and ‡Department of Chemistry, Bilkent University, Ankara 06800, Turkey
| | - Sefik Suzer
- Department of Physics and ‡Department of Chemistry, Bilkent University, Ankara 06800, Turkey
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39
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40
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Kawamoto N, Tang DM, Wei X, Wang X, Mitome M, Bando Y, Golberg D. Transmission electron microscope as an ultimate tool for nanomaterial property studies. Microscopy (Oxf) 2012; 62:157-75. [DOI: 10.1093/jmicro/dfs078] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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41
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Huang H, Zhang H, Ma Z, Liu Y, Ming H, Li H, Kang Z. Tunable synthesis of metal-graphene complex nanostructures and their catalytic ability for solvent-free cyclohexene oxidation in air. NANOSCALE 2012; 4:4964-4967. [PMID: 22695820 DOI: 10.1039/c2nr30962a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A one-step method was developed for the controllable construction of metal-graphene core-shell structures, hollow graphene nanospheres, and a high density of metal nanoparticles supported on graphene. The metal-graphene core-shell nanostructures as nanocatalysts show excellent catalytic ability for the selective oxidation of cyclohexene.
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Affiliation(s)
- Hui Huang
- Institute of Functional Nano & Soft Materials (FUNSOM) and Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, China
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42
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Golberg D, Costa PMFJ, Wang MS, Wei X, Tang DM, Xu Z, Huang Y, Gautam UK, Liu B, Zeng H, Kawamoto N, Zhi C, Mitome M, Bando Y. Nanomaterial engineering and property studies in a transmission electron microscope. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2012; 24:177-194. [PMID: 21997341 DOI: 10.1002/adma.201102579] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2011] [Indexed: 05/31/2023]
Abstract
Modern methods of in situ transmission electron microscopy (TEM) allow one to not only manipulate with a nanoscale object at the nanometer-range precision but also to get deep insights into its physical and chemical statuses. Dedicated TEM holders combining the capabilities of a conventional high-resolution TEM instrument and atomic force -, and/or scanning tunneling microscopy probes become the powerful tools in nanomaterials analysis. This progress report highlights the past, present and future of these exciting methods based on the extensive authors endeavors over the last five years. The objects of interest are diverse. They include carbon, boron nitride and other inorganic one- and two-dimensional nanoscale materials, e.g., nanotubes, nanowires and nanosheets. The key point of all experiments discussed is that the mechanical and electrical transport data are acquired on an individual nanostructure level under ultimately high spatial, temporal and energy resolution achievable in TEM, and thus can directly be linked to morphological, structural and chemical peculiarities of a given nanomaterial.
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Affiliation(s)
- Dmitri Golberg
- Nanotube Unit, International Center for Materials, Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), Tsukuba, Ibaraki, Japan.
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43
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Masubuchi S, Arai M, Machida T. Atomic force microscopy based tunable local anodic oxidation of graphene. NANO LETTERS 2011; 11:4542-4546. [PMID: 21939271 DOI: 10.1021/nl201448q] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have fabricated graphene/graphene oxide/graphene (G/GO/G) junctions by local anodic oxidation lithography using atomic force microscopy (AFM). The conductance of the G/GO/G junction decreased with the bias voltage applied to the AFM cantilever V(tip). For G/GO/G junctions fabricated with large and small |V(tip)|. GO was semi-insulating and semiconducting, respectively. AFM-based LAO lithography can be used to locally oxidize graphene with various oxidation levels and achieve tunability from semiconducting to semi-insulating GO.
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Affiliation(s)
- Satoru Masubuchi
- Institute of Industrial Science, University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8505, Japan.
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