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Chen L, Yang S, Dotzert M, Melling CWJ, Zhang J. Hybrid reduced graphene oxide nanosheets with negative magnetoresistance for the diagnosis of hypoglycemia. J Mater Chem B 2023; 11:998-1007. [PMID: 36621800 DOI: 10.1039/d2tb01927b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Few glucometers are available to easily and quickly measure low blood glucose levels (≤4 mmol L-1) from a small amount of blood samples. Here, a hybrid reduced graphene oxide (rGO)-based magnetoresistance (MR) sensor has been developed to monitor blood glucose levels to quickly detect hypoglycemia. Hybrid rGO nanosheets, incorporating Fe50Co50 nanoparticles onto rGO nanosheets, with an unusual large negative MR (-5.7%) at room temperature under a small magnetic field (9.5 kOe) have been successfully fabricated through a one-pot reaction. To quickly detect the low concentration of glucose in a small amount of blood (1 μL), a two-step process has been further developed by using the "sandwich" structural MR sensor. The results show that the higher the negative MR value of the sensor, the lower the concentration of glucose that can be detected. A linear relationship between the MR and the concentration of the spiked plasma glucose taken from streptozotocin-induced diabetic rats can be found when the concentration of glucose is in the range of 0-6 mmol L-1. The limit of detection (LOD) of this MR glucose sensor is 0.867 mmol L-1. The accuracy of the rGO-based MR sensor is improved in measuring low concentration of plasma glucose as compared to that of a commercialized glucometer. Furthermore, the selectivity of the rGO-based MR sensor has been studied. The results demonstrate that the rGO-based MR sensor is a flexible and sensitive detection platform and specifically suitable for monitoring low concentrations of plasma glucose to prevent from hypoglycemia.
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Affiliation(s)
- Longyi Chen
- Department of Chemical and Biochemical Engineering, University of Western Ontario, London, Ontario, N6A 5B9, Canada.
| | - Songlin Yang
- Department of Chemical and Biochemical Engineering, University of Western Ontario, London, Ontario, N6A 5B9, Canada.
| | - Michelle Dotzert
- School of Kinesiology, Faculty of Health Sciences, University of Western Ontario, London, Ontario, N6A 5B9, Canada
| | - C W James Melling
- School of Kinesiology, Faculty of Health Sciences, University of Western Ontario, London, Ontario, N6A 5B9, Canada
| | - Jin Zhang
- Department of Chemical and Biochemical Engineering, University of Western Ontario, London, Ontario, N6A 5B9, Canada. .,School of Biomedical Engineering, University of Western Ontario, London, Ontario, N6A 5B9, Canada
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2
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Rehman Sagar RU, Zhang M, Wang X, Shabbir B, Stadler FJ. Facile magnetoresistance adjustment of graphene foam for magnetic sensor applications through microstructure tailoring. NANO MATERIALS SCIENCE 2020. [DOI: 10.1016/j.nanoms.2020.01.002] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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3
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Sagar RUR, Lifang C, Ali A, Khan MF, Abbas M, Malik MI, Khan K, Zeng J, Anwar T, Liang T. Unusual magnetotransport properties in graphene fibers. Phys Chem Chem Phys 2020; 22:25712-25719. [PMID: 33146207 DOI: 10.1039/d0cp05209d] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Graphene, purely sp2-hybridized, has already been extensively studied for magnetoelectronics, however, the magnetotransport properties of graphene fibers (GrFib) have not been explored very well to date. Herein, unique magnetotransport properties of graphene fibers are detected. All the GrFib-samples show the highest positive magnetoresistance (MR ∼ 60%) at room temperature (300 K) that gradually decreases (MR ∼ 37%) at low temperature (5 K), indicating quite different behavior for a graphene derivative. The MR of three different morphologies are compared: single graphene sheet (60-100% at 300 K and 100-110% at 5 K under an applied magnetic field of 5 T), graphene foam (GF-100% at 300 K and 158% at 5 K under an applied magnetic field of 5 T), and graphene fiber (60% at 300 K and 37% at 300 K under an applied magnetic field of 5 T), and found that each morphology has a different magnitude of MR under similar magnitude of magnetic field and temperature. Unlike graphene and GF, GrFib shows a decreasing trend of MR at low temperatures, violating commonly used weak anti-localization phenomena in graphene. Technologically, each morphology of graphene has a unique set of magnetotransport properties that can be considered for particular magnetoelectronic devices depending upon the mechanical, electrical, and magnetotransport properties.
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Affiliation(s)
- Rizwan Ur Rehman Sagar
- School of Materials Science and Engineering, Jiangxi University of Science and Technology, Jiangxi 341000, P. R. China.
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4
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Garg R, Gopalan DP, de la Barrera SC, Hafiz H, Nuhfer NT, Viswanathan V, Hunt BM, Cohen-Karni T. Electron Transport in Multidimensional Fuzzy Graphene Nanostructures. NANO LETTERS 2019; 19:5335-5339. [PMID: 31265782 DOI: 10.1021/acs.nanolett.9b01790] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Atomically thin two-dimensional (2D) materials offer a range of superlative electronic and electrochemical properties that facilitate applications in sensing, energy conversion, and storage. Graphene, a 2D allotrope of carbon, has exceptional surface area per unit mass and highly catalytic edges. To leverage these properties, efforts have been made to synthesize complex three-dimensional (3D) geometries of graphene, with an eye toward integration into functional electronic devices. However, the electronic transport properties of such complex 3D structures are not well understood at a microscopic level. Here, we report electron transport in a 3D arrangement of free-standing 2D graphene flakes along an isolated one-dimensional Si nanowire. We show that transport through the free-standing graphene network is dominated by variable-range hopping and leads to negative magnetoresistance, from cryogenic conditions up to room temperature. Our findings lay the foundation for studying transport mechanisms in 2D material-based multidimensional nanostructures.
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Affiliation(s)
- Raghav Garg
- Department of Materials Science and Engineering , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
| | - Devashish P Gopalan
- Department of Physics , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
| | - Sergio C de la Barrera
- Department of Physics , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
| | - Hasnain Hafiz
- Department of Mechanical Engineering , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
| | - Noel T Nuhfer
- Department of Materials Science and Engineering , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
| | | | - Benjamin M Hunt
- Department of Materials Science and Engineering , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
- Department of Physics , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
| | - Tzahi Cohen-Karni
- Department of Materials Science and Engineering , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
- Department of Biomedical Engineering , Carnegie Mellon University , Pittsburgh , Pennsylvania 15213 , United States
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5
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Zeb MH, Shabbir B, Sagar RUR, Mahmood N, Chen K, Qasim I, Malik MI, Yu W, Hossain MM, Dai Z, Ou Q, Bhat MA, Shivananju BN, Li Y, Tang X, Qi K, Younis A, Khan Q, Zhang Y, Bao Q. Superior Magnetoresistance Performance of Hybrid Graphene Foam/Metal Sulfide Nanocrystal Devices. ACS APPLIED MATERIALS & INTERFACES 2019; 11:19397-19403. [PMID: 31026141 DOI: 10.1021/acsami.9b00020] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Interfaces between metals and semiconducting materials can inevitably influence the magnetotransport properties, which are crucial for technological applications ranging from magnetic sensing to storage devices. By taking advantage of this, a metallic graphene foam is integrated with semiconducting copper-based metal sulfide nanocrystals, i.e., Cu2ZnSnS4 (copper-zinc-tin-sulfur) without direct chemical bonding and structural damage, which creates numerous nanoboundaries that can be basically used to tune the magnetotransport properties. Herein, the magnetoresistance of a graphene foam is enhanced from nearly 90 to 130% at room temperature and under the application of 5 T magnetic field strength due to the addition of Cu2ZnSnS4 nanocrystals in high densities. We believe that the enhancement of magnetoresistance in hybrid graphene foam/Cu2ZnSnS4 nanocrystals is due to the evolution of the mobility fluctuation mechanism, triggered by the formation of nanoboundaries. Incorporating Cu2ZnSnS4 nanocrystals into a graphene foam not only provides an effective way to further enhance the magnitude of magnetoresistance but also opens a suitable window to achieve efficient and highly functional magnetic sensors with a large, linear, and controllable response.
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Affiliation(s)
| | - Babar Shabbir
- Department of Materials Science and Engineering, and ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) , Monash University , Clayton , Victoria 3800 , Australia
| | | | - Nasir Mahmood
- School of Engineering , RMIT University , 124 La Trobe Street , 3001 Melbourne , Victoria , Australia
| | | | - Irfan Qasim
- Department of Physics , Riphah International University , Islamabad 44000 , Pakistan
| | - Muhammad Imran Malik
- School of Electrical Engineering and Computer Science (SEECS) , National University of Sciences and Technology (NUST) , H-12 , Islamabad 44000 , Pakistan
| | - Wenzhi Yu
- Department of Materials Science and Engineering, and ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) , Monash University , Clayton , Victoria 3800 , Australia
| | - M Mosarof Hossain
- Department of Materials Science and Engineering, and ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) , Monash University , Clayton , Victoria 3800 , Australia
| | - Zhigao Dai
- Department of Materials Science and Engineering, and ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) , Monash University , Clayton , Victoria 3800 , Australia
| | - Qingdong Ou
- Department of Materials Science and Engineering, and ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) , Monash University , Clayton , Victoria 3800 , Australia
| | | | - Bannur Nanjunda Shivananju
- Department of Materials Science and Engineering, and ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) , Monash University , Clayton , Victoria 3800 , Australia
| | - Yun Li
- Department of Materials Science and Engineering, and ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) , Monash University , Clayton , Victoria 3800 , Australia
| | | | - Kun Qi
- Department of Materials Science and Engineering, and ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) , Monash University , Clayton , Victoria 3800 , Australia
| | - Adnan Younis
- School of Materials Science and Engineering , University of New South Wales , Sydney , NSW 2052 , Australia
| | | | | | - Qiaoliang Bao
- Department of Materials Science and Engineering, and ARC Centre of Excellence in Future Low-Energy Electronics Technologies (FLEET) , Monash University , Clayton , Victoria 3800 , Australia
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6
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Ma Y, Jiang W, Han J, Tong Z, Wang M, Suhr J, Chen X, Xiao L, Jia S, Chae H. Experimental Investigation on Vertically Oriented Graphene Grown in a Plasma-Enhanced Chemical Vapor Deposition Process. ACS APPLIED MATERIALS & INTERFACES 2019; 11:10237-10243. [PMID: 30794749 DOI: 10.1021/acsami.9b00896] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Vertically oriented graphene (VG) with three-dimensional architecture has been proved to exhibit unique properties, and its particular morphology has been realized by researchers to be crucial for its performance in practical applications. In this study, we investigated the morphology evolution of VG films synthesized by the plasma-enhanced chemical vapor deposition process, including porous graphene film, graphene wall, and graphene forest. This study reveals that the morphology of VG is controlled by a combination of the deposition and etching effects and tailored by the growth conditions, such as plasma source power and growth time and temperature. The plasma source power relates to the number of branches of VG, and the growth temperature relates to the thickness of each VG flake, whereas the growth time determines the height of VG. Finally, the electrochemical properties of VG films along with morphology evolution are investigated by fabricating as VG-based supercapacitor electrodes.
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Affiliation(s)
- Yifei Ma
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Collaborative Innovation Center of Extreme Optics , Shanxi University , Taiyuan , Shanxi 030006 , People's Republic of China
| | | | - Jiemin Han
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Collaborative Innovation Center of Extreme Optics , Shanxi University , Taiyuan , Shanxi 030006 , People's Republic of China
| | - Zhaomin Tong
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Collaborative Innovation Center of Extreme Optics , Shanxi University , Taiyuan , Shanxi 030006 , People's Republic of China
| | - Mei Wang
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Collaborative Innovation Center of Extreme Optics , Shanxi University , Taiyuan , Shanxi 030006 , People's Republic of China
| | | | - Xuyuan Chen
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Collaborative Innovation Center of Extreme Optics , Shanxi University , Taiyuan , Shanxi 030006 , People's Republic of China
- Faculty of Technology, Natural Sciences and Maritime Sciences, Department of Microsystems , University of Southeast Norway , Borre N-3184 , Norway
| | - Liantuan Xiao
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Collaborative Innovation Center of Extreme Optics , Shanxi University , Taiyuan , Shanxi 030006 , People's Republic of China
| | - Suotang Jia
- State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Collaborative Innovation Center of Extreme Optics , Shanxi University , Taiyuan , Shanxi 030006 , People's Republic of China
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7
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Levchenko I, Bazaka K, Keidar M, Xu S, Fang J. Hierarchical Multicomponent Inorganic Metamaterials: Intrinsically Driven Self-Assembly at the Nanoscale. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:1702226. [PMID: 29152907 DOI: 10.1002/adma.201702226] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Revised: 07/10/2017] [Indexed: 06/07/2023]
Abstract
Increasingly intricate in their composition and structural organization, hierarchical multicomponent metamaterials with nonlinear spatially reconfigurable functionalities challenge the intrinsic constraints of natural materials, revealing tremendous potential for the advancement of biochemistry, nanophotonics, and medicine. Recent breakthroughs in high-resolution nanofabrication utilizing ultranarrow, precisely controlled ion or laser beams have enabled assembly of architectures of unprecedented structural and functional complexity, yet costly, time- and energy-consuming high-resolution sequential techniques do not operate effectively at industry-required scale. Inspired by the fictional Baron Munchausen's fruitless attempt to pull himself up, it is demonstrated that metamaterials can undergo intrinsically driven self-assembly, metaphorically pulling themselves up into existence. These internal drivers hold a key to unlocking the potential of metamaterials and mapping a new direction for the large-area, cost-efficient self-organized fabrication of practical devices. A systematic exploration of these efforts is presently missing, and the driving forces governing the intrinsically driven self-assembly are yet to be fully understood. Here, recent progress in the self-organized formation and self-propelled growth of complex hierarchical multicomponent metamaterials is reviewed, with emphasis on key principles, salient features, and potential limitations of this family of approaches. Special stress is placed on self-assembly driven by plasma, current in liquid, ultrasonic, and similar highly energetic effects, which enable self-directed formation of metamaterials with unique properties and structures.
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Affiliation(s)
- Igor Levchenko
- Plasma Sources and Applications Centre, NIE, Nanyang Technological University, Singapore, 637616, Singapore
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Kateryna Bazaka
- School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology, Brisbane, QLD, 4000, Australia
| | - Michael Keidar
- Mechanical and Aerospace Engineering, George Washington University, Washington, DC, 20052, USA
| | - Shuyan Xu
- Plasma Sources and Applications Centre, NIE, Nanyang Technological University, Singapore, 637616, Singapore
| | - Jinghua Fang
- School of Mathematical and Physical Sciences, University of Technology Sydney, Ultimo, NSW 2007, Sydney, Australia
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8
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Sagar RUR, Galluzzi M, Wan C, Shehzad K, Navale ST, Anwar T, Mane RS, Piao HG, Ali A, Stadler FJ. Large, Linear, and Tunable Positive Magnetoresistance of Mechanically Stable Graphene Foam-Toward High-Performance Magnetic Field Sensors. ACS APPLIED MATERIALS & INTERFACES 2017; 9:1891-1898. [PMID: 27977125 DOI: 10.1021/acsami.6b13044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Here, we present the first observation of magneto-transport properties of graphene foam (GF) composed of a few layers in a wide temperature range of 2-300 K. Large room-temperature linear positive magnetoresistance (PMR ≈ 171% at B ≈ 9 T) has been detected. The largest PMR (∼213%) has been achieved at 2 K under a magnetic field of 9 T, which can be tuned by the addition of poly(methyl methacrylate) to the porous structure of the foam. This remarkable magnetoresistance may be the result of quadratic magnetoresistance. The excellent magneto-transport properties of GF open a way toward three-dimensional graphene-based magnetoelectronic devices.
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Affiliation(s)
| | | | - Caihua Wan
- Institute of Physics, Chinese Academy of Sciences , Beijing, 100190, PR China
| | - Khurram Shehzad
- Department of Information Science and Electronic Engineering, Zhejiang University , Hangzhou 310027, PR China
| | | | - Tauseef Anwar
- Beijing Key Laboratory of Fine Ceramics, Institute of Nuclear and New Energy Technology, Tsinghua University , Beijing 100084, PR China
| | - Rajaram S Mane
- School of Physical Sciences, Swami Ramanand Teerth Marathwada University , Nanded 431606, India
- Department of Chemistry, College of Science, Bld-5, King Saud University , Riyadh, Saudi Arabia
| | - Hong-Guang Piao
- College of Science, China Three Gorges University , Yichang 443002, PR China
| | - Abid Ali
- Department of Chemistry, Quaid-i-Azam University , Islamabad 45320, Pakistan
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9
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Wang Z, Samaraweera RL, Reichl C, Wegscheider W, Mani RG. Tunable electron heating induced giant magnetoresistance in the high mobility GaAs/AlGaAs 2D electron system. Sci Rep 2016; 6:38516. [PMID: 27924953 PMCID: PMC5141424 DOI: 10.1038/srep38516] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 11/10/2016] [Indexed: 11/25/2022] Open
Abstract
Electron-heating induced by a tunable, supplementary dc-current (Idc) helps to vary the observed magnetoresistance in the high mobility GaAs/AlGaAs 2D electron system. The magnetoresistance at B = 0.3 T is shown to progressively change from positive to negative with increasing Idc, yielding negative giant-magnetoresistance at the lowest temperature and highest Idc. A two-term Drude model successfully fits the data at all Idc and T. The results indicate that carrier heating modifies a conductivity correction σ1, which undergoes sign reversal from positive to negative with increasing Idc, and this is responsible for the observed crossover from positive- to negative- magnetoresistance, respectively, at the highest B.
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Affiliation(s)
- Zhuo Wang
- Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30303, USA
| | - R L Samaraweera
- Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30303, USA
| | - C Reichl
- Laboratorium für Festkörperphysik, ETH-Zürich, Zürich 8093, Switzerland
| | - W Wegscheider
- Laboratorium für Festkörperphysik, ETH-Zürich, Zürich 8093, Switzerland
| | - R G Mani
- Department of Physics and Astronomy, Georgia State University, Atlanta, GA 30303, USA
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10
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Controllable growth of vertically aligned graphene on C-face SiC. Sci Rep 2016; 6:34814. [PMID: 27708399 PMCID: PMC5052588 DOI: 10.1038/srep34814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 09/20/2016] [Indexed: 11/23/2022] Open
Abstract
We investigated how to control the growth of vertically aligned graphene on C-face SiC by varying the processing conditions. It is found that, the growth rate scales with the annealing temperature and the graphene height is proportional to the annealing time. Temperature gradient and crystalline quality of the SiC substrates influence their vaporization. The partial vapor pressure is crucial as it can interfere with further vaporization. A growth mechanism is proposed in terms of physical vapor transport. The monolayer character of vertically aligned graphene is verified by Raman and X-ray absorption spectroscopy. With the processed samples, d0 magnetism is realized and negative magnetoresistance is observed after Cu implantation. We also prove that multiple carriers exist in vertically aligned graphene.
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11
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Levchenko I, Fang J, Ostrikov K(K, Lorello L, Keidar M. Morphological Characterization of Graphene Flake Networks Using Minkowski Functionals. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/graphene.2016.51003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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12
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Abstract
Energy deficiency, global poverty, chronic hunger, chronic diseases, and environment conservation are among the major problems threatening the whole mankind. Nanostructure-based technologies could be a possible solution. Such techniques are now used for the production of many vitally important products including cultured and fermented food, antibiotics, various medicines, and biofuels. On the other hand, the nanostructure-based technologies still demonstrate low efficiency and controllability, and thus still are not capable to decisively address the global problems. Furthermore, future technologies should ensure lowest possible environmental impact by implementing green production principles. One of the most promising approaches to address these challenges are the sophisticatedly engineered biointerfaces. Here, the authors briefly evaluate the potential of the plasma-based techniques for the fabrication of complex biointerfaces. The authors consider mainly the atmospheric and inductively coupled plasma environments and show several examples of the artificial plasma-created biointerfaces, which can be used for the biotechnological and medical processes, as well as for the drug delivery devices, fluidised bed bioreactors, catalytic reactors, and others. A special attention is paid to the plasma-based treatment and processing of the biointerfaces formed by arrays of carbon nanotubes and graphene flakes.
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13
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Bazaka K, Jacob MV, Chrzanowski W, Ostrikov K. Anti-bacterial surfaces: natural agents, mechanisms of action, and plasma surface modification. RSC Adv 2015. [DOI: 10.1039/c4ra17244b] [Citation(s) in RCA: 152] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
This article reviews antibacterial surface strategies based on reactive plasma chemistry, focusing on how plasma-assisted processing of natural antimicrobial agents can produce antifouling and antibacterial materials for biomedical devices.
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Affiliation(s)
- K. Bazaka
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology
- Brisbane
- Australia
| | - M. V. Jacob
- College of Science, Technology and Engineering
- James Cook University
- Townsville
- Australia
| | | | - K. Ostrikov
- School of Chemistry
- Physics and Mechanical Engineering
- Queensland University of Technology
- Brisbane
- Australia
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14
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Ghosh S, Ganesan K, Polaki SR, Ilango S, Amirthapandian S, Dhara S, Kamruddin M, Tyagi AK. Flipping growth orientation of nanographitic structures by plasma enhanced chemical vapor deposition. RSC Adv 2015. [DOI: 10.1039/c5ra20820c] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Nanographitic structures (NGSs) with a multitude of morphological features are grown on SiO2/Si substrates by electron cyclotron resonance-plasma enhanced chemical vapor deposition (ECR-PECVD).
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Affiliation(s)
- Subrata Ghosh
- Materials Science Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam-603102
- India
| | - K. Ganesan
- Materials Science Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam-603102
- India
| | - S. R. Polaki
- Materials Science Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam-603102
- India
| | - S. Ilango
- Materials Science Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam-603102
- India
| | - S. Amirthapandian
- Materials Science Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam-603102
- India
| | - S. Dhara
- Materials Science Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam-603102
- India
| | - M. Kamruddin
- Materials Science Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam-603102
- India
| | - A. K. Tyagi
- Materials Science Group
- Indira Gandhi Centre for Atomic Research
- Kalpakkam-603102
- India
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15
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Huang J, Guo LW, Li ZL, Chen LL, Lin JJ, Jia YP, Lu W, Guo Y, Chen XL. Anisotropic quantum transport in a network of vertically aligned graphene sheets. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2014; 26:345301. [PMID: 25090659 DOI: 10.1088/0953-8984/26/34/345301] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Novel anisotropic quantum transport was observed in a network of vertically aligned graphene sheets (VAGSs), which can be regarded as composed of plenty of quasi-parallel, nearly intrinsic, freestanding monolayers of graphene. When a magnetic field was perpendicular to most graphene sheets, magnetoresistance (MR) curves showed a weak localization (WL) effect at low field and a maximum value at a critical field ascribed to diffusive boundary scattering. While the magnetic field was parallel to the graphene sheets, the MR maximum disappeared and exhibited a transition from WL to weak antilocalization (WAL) with increasing temperature and magnetic field. Edges as atomically sharp defects are the main elastic and inelastic intervalley scattering sources, and inelastic scattering is ascribed to electron-electron intervalley scattering in the ballistic regime. This is the first time simultaneously observing WL, WAL and diffusive boundary scattering in such a macroscopic three-dimensional graphene system. These indicate the VAGS network is a robust platform for the study of the intrinsic physical properties of graphene.
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Affiliation(s)
- J Huang
- Research & Development Center for Functional Crystals, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences Beijing, People's Republic of China
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16
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Park EJ, Lee GH, Han BS, Lee BS, Lee S, Cho MH, Kim JH, Kim DW. Toxic response of graphene nanoplatelets in vivo and in vitro. Arch Toxicol 2014; 89:1557-68. [DOI: 10.1007/s00204-014-1303-x] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Accepted: 06/17/2014] [Indexed: 10/25/2022]
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17
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Wang T, Si M, Yang D, Shi Z, Wang F, Yang Z, Zhou S, Xue D. Angular dependence of the magnetoresistance effect in a silicon based p-n junction device. NANOSCALE 2014; 6:3978-3983. [PMID: 24561960 DOI: 10.1039/c3nr04077a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We report a pronounced angular dependence of the magnetoresistance (MR) effect in a silicon based p-n junction device at room temperature by manipulating the space charge region of the p-n junction under a magnetic field. For the p-n junction device with various space charge region configurations, we find that all the angular dependence of the MR effect is proportional to sin(2)(θ), where the θ is the angle between the magnetic field and the driving current. With increasing the magnetic field and driving current, the anisotropic MR effect is obviously improved. At room temperature, under a magnetic field 2 T and driving current 20 mA, the MR ratio is about 50%, almost one order of amplitude larger than that in the magnetic material permalloy. Our results reveal an interpretation of the MR effect in the non-magnetic p-n junction in terms of the Lorentz force and give a new way for the development of future magnetic sensors with non-magnetic p-n junctions.
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Affiliation(s)
- Tao Wang
- The Key Laboratory for Magnetism and Magnetic materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China.
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