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Nguyen TK, Phan HP, Kamble H, Vadivelu R, Dinh T, Iacopi A, Walker G, Hold L, Nguyen NT, Dao DV. Superior Robust Ultrathin Single-Crystalline Silicon Carbide Membrane as a Versatile Platform for Biological Applications. ACS APPLIED MATERIALS & INTERFACES 2017; 9:41641-41647. [PMID: 29140077 DOI: 10.1021/acsami.7b15381] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Micromachined membranes are promising platforms for cell culture thanks to their miniaturization and integration capabilities. Possessing chemical inertness, biocompatibility, and integration, silicon carbide (SiC) membranes have attracted great interest toward biological applications. In this paper, we present the batch fabrication, mechanical characterizations, and cell culture demonstration of robust ultrathin epitaxial deposited SiC membranes. The as-fabricated ultrathin SiC membranes, with an ultrahigh aspect ratio (length/thickness) of up to 20 000, possess high a fracture strength up to 2.95 GPa and deformation up to 50 μm. A high optical transmittance of above 80% at visible wavelengths was obtained for 50 nm membranes. The as-fabricated membranes were experimentally demonstrated as an excellent substrate platform for bio-MEMS/NEMS cell culture with the cell viability rate of more than 92% after 72 h. The ultrathin SiC membrane is promising for in vitro observations/imaging of bio-objects with an extremely short optical access.
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Affiliation(s)
- Tuan-Khoa Nguyen
- Queensland Micro-Nanotechnology Centre, Griffith University , Nathan, Queensland 4111, Australia
| | - Hoang-Phuong Phan
- Queensland Micro-Nanotechnology Centre, Griffith University , Nathan, Queensland 4111, Australia
| | - Harshad Kamble
- Queensland Micro-Nanotechnology Centre, Griffith University , Nathan, Queensland 4111, Australia
| | - Raja Vadivelu
- Queensland Micro-Nanotechnology Centre, Griffith University , Nathan, Queensland 4111, Australia
| | - Toan Dinh
- Queensland Micro-Nanotechnology Centre, Griffith University , Nathan, Queensland 4111, Australia
| | - Alan Iacopi
- Queensland Micro-Nanotechnology Centre, Griffith University , Nathan, Queensland 4111, Australia
| | - Glenn Walker
- Queensland Micro-Nanotechnology Centre, Griffith University , Nathan, Queensland 4111, Australia
| | - Leonie Hold
- Queensland Micro-Nanotechnology Centre, Griffith University , Nathan, Queensland 4111, Australia
| | - Nam-Trung Nguyen
- Queensland Micro-Nanotechnology Centre, Griffith University , Nathan, Queensland 4111, Australia
| | - Dzung Viet Dao
- Queensland Micro-Nanotechnology Centre, Griffith University , Nathan, Queensland 4111, Australia
- School of Engineering, Griffith University , Gold Coast, Queensland 4217, Australia
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Alekseev S, Shamatulskaya E, Volvach M, Gryn S, Korytko D, Bezverkhyy I, Iablokov V, Lysenko V. Size and Surface Chemistry Tuning of Silicon Carbide Nanoparticles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:13561-13571. [PMID: 29099996 DOI: 10.1021/acs.langmuir.7b02784] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Chemical transformations on the surface of commercially available 3C-SiC nanoparticles were studied by means of FTIR, XPS, and temperature-programmed desorption mass spectrometry methods. Thermal oxidation of SiC NPs resulted in the formation of a hydroxylated SiO2 surface layer with C3Si-H and CHx groups over the SiO2/SiC interface. Controllable oxidation followed by oxide dissolution in HF or KOH solution allowed the SiC NPs size tuning from 17 to 9 nm. Oxide-free SiC surfaces, terminated by hydroxyls and C3Si-H groups, can be efficiently functionalized by alkenes under thermal or photochemical initiation. Treatment of SiC NPs by HF/HNO3 mixture produces a carbon-enriched surface layer with carboxylic acid groups susceptible to amide chemistry functionalization. The hydroxylated, carboxylated, and aminated SiC NPs form stable aqueous sols.
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Affiliation(s)
- Sergei Alekseev
- Taras Shevchenko National University of Kyiv, 62a, Volodymyrs'ka Street, 01601 Kyiv, Ukraine
- Science Park Kyiv Taras Shevchenko University, 60, Volodymyrs'ka Street, 01033 Kyiv, Ukraine
| | - Elena Shamatulskaya
- Taras Shevchenko National University of Kyiv, 62a, Volodymyrs'ka Street, 01601 Kyiv, Ukraine
| | - Mykola Volvach
- Taras Shevchenko National University of Kyiv, 62a, Volodymyrs'ka Street, 01601 Kyiv, Ukraine
| | - Svitlana Gryn
- Taras Shevchenko National University of Kyiv, 62a, Volodymyrs'ka Street, 01601 Kyiv, Ukraine
- Science Park Kyiv Taras Shevchenko University, 60, Volodymyrs'ka Street, 01033 Kyiv, Ukraine
| | - Dmytro Korytko
- Taras Shevchenko National University of Kyiv, 62a, Volodymyrs'ka Street, 01601 Kyiv, Ukraine
- Science Park Kyiv Taras Shevchenko University, 60, Volodymyrs'ka Street, 01033 Kyiv, Ukraine
| | - Igor Bezverkhyy
- Laboratoire Interdisciplinaire Carnot de Bourgogne, UMR CNRS 6303, Universite de Bourgogne , 21078 Dijon, France
| | - Viacheslav Iablokov
- Voiland School of Chemical Engineering and Bioengineering, Washington State University , Pullman, Washington 99164, United States
| | - Vladimir Lysenko
- Nanotechnology Institute of Lyon (INL), UMR CNRS 5270, University of Lyon , 69361 Lyon, France
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53
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Arnoldussen YJ, Ervik TK, Berlinger B, Kero I, Shaposhnikov S, Zienolddiny S. Cellular responses of human astrocytoma cells to dust from the Acheson process: An in vitro study. Neurotoxicology 2017; 65:241-247. [PMID: 29113734 DOI: 10.1016/j.neuro.2017.11.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Revised: 11/02/2017] [Accepted: 11/02/2017] [Indexed: 10/18/2022]
Abstract
Silicon carbide (SiC) is largely used in various products such as diesel particulate filters and solar panels. It is produced through the Acheson process where aerosolized fractions of SiC and other by-products are generated in the work environment and may potentially affect the workers' health. In this study, dust was collected directly on a filter in a furnace hall over a time period of 24h. The collected dust was characterized by scanning electron microscopy and found to contain a high content of graphite particles, and carbon and silicon containing particles. Only 6% was classified as SiC, whereof only 10% had a fibrous structure. To study effects of exposure beyond the respiratory system, neurotoxic effects on human astrocytic cells, were investigated. Both low, occupationally relevant, and high doses from 9E-6μg/cm2 up to 4.5μg/cm2 were used, respectively. Cytotoxicity assay indicated no effects of low doses but an effect of the higher doses after 24h. Furthermore, investigation of intracellular reactive oxygen species (ROS) indicated no effects with low doses, whereas a higher dose of 0.9μg/cm2 induced a significant increase in ROS and DNA damage. In summary, low doses of dust from the Acheson process may exert no or little toxic effects, at least experimentally in the laboratory on human astrocytes. However, higher doses have implications and are likely a result of the complex composition of the dust.
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Affiliation(s)
- Yke Jildouw Arnoldussen
- Department of Biological and Chemical Work Environment, National Institute of Occupational Health, Pb 8149 Dep., N-0033, Oslo, Norway
| | - Torunn Kringlen Ervik
- Department of Biological and Chemical Work Environment, National Institute of Occupational Health, Pb 8149 Dep., N-0033, Oslo, Norway
| | - Balazs Berlinger
- Department of Biological and Chemical Work Environment, National Institute of Occupational Health, Pb 8149 Dep., N-0033, Oslo, Norway
| | - Ida Kero
- Department of Industrial Process, Technology SINTEF Materials and Chemistry, PB 4760, N-7465, Trondheim, Norway
| | | | - Shanbeh Zienolddiny
- Department of Biological and Chemical Work Environment, National Institute of Occupational Health, Pb 8149 Dep., N-0033, Oslo, Norway.
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54
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Phan HP, Cheng HH, Dinh T, Wood B, Nguyen TK, Mu F, Kamble H, Vadivelu R, Walker G, Hold L, Iacopi A, Haylock B, Dao DV, Lobino M, Suga T, Nguyen NT. Single-Crystalline 3C-SiC anodically Bonded onto Glass: An Excellent Platform for High-Temperature Electronics and Bioapplications. ACS APPLIED MATERIALS & INTERFACES 2017; 9:27365-27371. [PMID: 28792726 DOI: 10.1021/acsami.7b06661] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Single-crystal cubic silicon carbide has attracted great attention for MEMS and electronic devices. However, current leakage at the SiC/Si junction at high temperatures and visible-light absorption of the Si substrate are main obstacles hindering the use of the platform in a broad range of applications. To solve these bottlenecks, we present a new platform of single crystal SiC on an electrically insulating and transparent substrate using an anodic bonding process. The SiC thin film was prepared on a 150 mm Si with a surface roughness of 7 nm using LPCVD. The SiC/Si wafer was bonded to a glass substrate and then the Si layer was completely removed through wafer polishing and wet etching. The bonded SiC/glass samples show a sharp bonding interface of less than 15 nm characterized using deep profile X-ray photoelectron spectroscopy, a strong bonding strength of approximately 20 MPa measured from the pulling test, and relatively high optical transparency in the visible range. The transferred SiC film also exhibited good conductivity and a relatively high temperature coefficient of resistance varying from -12 000 to -20 000 ppm/K, which is desirable for thermal sensors. The biocompatibility of SiC/glass was also confirmed through mouse 3T3 fibroblasts cell-culturing experiments. Taking advantage of the superior electrical properties and biocompatibility of SiC, the developed SiC-on-glass platform offers unprecedented potentials for high-temperature electronics as well as bioapplications.
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Affiliation(s)
| | - Han-Hao Cheng
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , Brisbane, Queensland 4072, Australia
| | | | - Barry Wood
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland , Brisbane, Queensland 4072, Australia
| | | | - Fengwen Mu
- Department of Precision Engineering, The University of Tokyo , Tokyo 113-8654, Japan
| | | | | | | | | | | | | | | | | | - Tadatomo Suga
- Department of Precision Engineering, The University of Tokyo , Tokyo 113-8654, Japan
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55
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Rizwan M, Hamdi M, Basirun WJ. Bioglass® 45S5-based composites for bone tissue engineering and functional applications. J Biomed Mater Res A 2017; 105:3197-3223. [DOI: 10.1002/jbm.a.36156] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Revised: 07/02/2017] [Accepted: 07/03/2017] [Indexed: 12/13/2022]
Affiliation(s)
- M. Rizwan
- Department of Mechanical Engineering; Faculty of Engineering, University of Malaya; Kuala Lumpur 50603 Malaysia
- Department of Metallurgical Engineering; Faculty of Chemical and Process Engineering, NED University of Engineering and Technology; Karachi 75270 Pakistan
| | - M. Hamdi
- Center of Advanced Manufacturing and Material Processing, University of Malaya; Kuala Lumpur 50603 Malaysia
| | - W. J. Basirun
- Department of Chemistry; Faculty of Science, University of Malaya; Kuala Lumpur 50603 Malaysia
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56
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Atabay M, Jahanbin Sardroodi J, Rastkar Ebrahimzadeh A. Adsorption and immobilisation of human insulin on graphene monoxide, silicon carbide and boron nitride nanosheets investigated by molecular dynamics simulation. MOLECULAR SIMULATION 2017. [DOI: 10.1080/08927022.2016.1270452] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Maryam Atabay
- Molecular Simulation Lab, Azarbaijan Shahid Madani University, Tabriz, Iran
- Department of Chemistry, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Jaber Jahanbin Sardroodi
- Molecular Simulation Lab, Azarbaijan Shahid Madani University, Tabriz, Iran
- Department of Chemistry, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Alireza Rastkar Ebrahimzadeh
- Department of Chemistry, Azarbaijan Shahid Madani University, Tabriz, Iran
- Department of Physics, Azarbaijan Shahid Madani University, Tabriz, Iran
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57
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Seymour JP, Wu F, Wise KD, Yoon E. State-of-the-art MEMS and microsystem tools for brain research. MICROSYSTEMS & NANOENGINEERING 2017; 3:16066. [PMID: 31057845 PMCID: PMC6445015 DOI: 10.1038/micronano.2016.66] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 07/01/2016] [Accepted: 08/23/2016] [Indexed: 05/02/2023]
Abstract
Mapping brain activity has received growing worldwide interest because it is expected to improve disease treatment and allow for the development of important neuromorphic computational methods. MEMS and microsystems are expected to continue to offer new and exciting solutions to meet the need for high-density, high-fidelity neural interfaces. Herein, the state-of-the-art in recording and stimulation tools for brain research is reviewed, and some of the most significant technology trends shaping the field of neurotechnology are discussed.
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Affiliation(s)
- John P. Seymour
- Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48105, USA
| | - Fan Wu
- Diagnostic Biochips, Inc., Glen Burnie, MD 21061, USA
| | - Kensall D. Wise
- Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48105, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48105, USA
| | - Euisik Yoon
- Department of Electrical Engineering and Computer Science, University of Michigan, Ann Arbor, MI 48105, USA
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48105, USA
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58
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Liu W, Yang T, Chen J, Chen Y, Hou X, Han X, Chou KC. Improvement in surface-enhanced Raman spectroscopy from cubic SiC semiconductor nanowhiskers by adjustment of energy levels. Phys Chem Chem Phys 2016; 18:27572-27576. [PMID: 27711613 DOI: 10.1039/c6cp05346g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Enhanced reproducible Raman signals of the 4-MBA molecule were observed on the surface of semiconducting SiC nanowhiskers (SiCNWs) by surface-enhanced Raman spectroscopy (SERS). The SERS enhancement was further tuned and boosted by doping with B. Theoretical calculations were performed to unravel the mechanism of the SERS enhancement and it was found that the SERS effect was strongly associated with the energy level structure between the substrate and analyte. Appropriate energy level matching facilitated the charge transfer process during laser illumination, enhancing the SERS signal. This proposed mechanism was verified through multiple control experiments.
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Affiliation(s)
- Wenna Liu
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China.
| | - Tao Yang
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China.
| | - Junhong Chen
- School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Yingzhi Chen
- School of Material Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
| | - Xinmei Hou
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China.
| | - Xuemei Han
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore
| | - Kuo-Chih Chou
- State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing, Beijing 100083, China.
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59
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Bare and boron-doped cubic silicon carbide nanowires for electrochemical detection of nitrite sensitively. Sci Rep 2016; 6:24872. [PMID: 27109361 PMCID: PMC4843007 DOI: 10.1038/srep24872] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Accepted: 04/06/2016] [Indexed: 12/30/2022] Open
Abstract
Fabrication of eletrochemical sensors based on wide bandgap compound semiconductors has attracted increasing interest in recent years. Here we report for the first time electrochemical nitrite sensors based on cubic silicon carbide (SiC) nanowires (NWs) with smooth surface and boron-doped cubic SiC NWs with fin-like structure. Multiple techniques including scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electron energy loss spectroscopy (EELS) were used to characterize SiC and boron-doped SiC NWs. As for the electrochemical behavior of both SiC NWs electrode, the cyclic voltammetric results show that both SiC electrodes exhibit wide potential window and excellent electrocatalytic activity toward nitrite oxidation. Differential pulse voltammetry (DPV) determination reveals that there exists a good linear relationship between the oxidation peak current and the concentration in the range of 50-15000 μmoL L(-1) (cubic SiC NWs) and 5-8000 μmoL L(-1) (B-doped cubic SiC NWs) with the detection limitation of 5 and 0.5 μmoL L(-1) respectively. Compared with previously reported results, both as-prepared nitrite sensors exhibit wider linear response range with comparable high sensitivity, high stability and reproducibility.
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60
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Ata MS, Wojtal P, Zhitomirsky I. Electrophoretic deposition of materials using humic acid as a dispersant and film forming agent. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.01.042] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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61
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Lu X, Lee JY, Lin Q. High-frequency and high-quality silicon carbide optomechanical microresonators. Sci Rep 2015; 5:17005. [PMID: 26585637 PMCID: PMC4653626 DOI: 10.1038/srep17005] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Accepted: 10/22/2015] [Indexed: 11/26/2022] Open
Abstract
Silicon carbide (SiC) exhibits excellent material properties attractive for broad applications. We demonstrate the first SiC optomechanical microresonators that integrate high mechanical frequency, high mechanical quality, and high optical quality into a single device. The radial-breathing mechanical mode has a mechanical frequency up to 1.69 GHz with a mechanical Q around 5500 in atmosphere, which corresponds to a fm · Qm product as high as 9.47 × 10(12) Hz. The strong optomechanical coupling allows us to efficiently excite and probe the coherent mechanical oscillation by optical waves. The demonstrated devices, in combination with the superior thermal property, chemical inertness, and defect characteristics of SiC, show great potential for applications in metrology, sensing, and quantum photonics, particularly in harsh environments that are challenging for other device platforms.
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Affiliation(s)
- Xiyuan Lu
- Department of Physics and Astronomy, University of
Rochester, Rochester, NY
14627, USA
| | - Jonathan Y. Lee
- Department of Electrical and Computer Engineering, University of
Rochester, Rochester, NY
14627, USA
| | - Qiang Lin
- Department of Electrical and Computer Engineering, University of
Rochester, Rochester, NY
14627, USA
- Institute of Optics, University of Rochester,
Rochester, NY
14627, USA
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62
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Kuntumalla MK, Srikanth VVSS, Ravulapalli S, Gangadharini U, Ojha H, Desai NR, Bansal C. SERS activity of Ag decorated nanodiamond and nano-β-SiC, diamond-like-carbon and thermally annealed diamond thin film surfaces. Phys Chem Chem Phys 2015; 17:21331-6. [PMID: 25691097 DOI: 10.1039/c4cp05236f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
In the recent past surface enhanced Raman scattering (SERS) based bio-sensing has gained prominence owing to the simplicity and efficiency of the SERS technique. Dedicated and continuous research efforts have been made to develop SERS substrates that are not only stable, durable and reproducible but also facilitate real-time bio-sensing. In this context diamond, β-SiC and diamond-like-carbon (DLC) and other related thin films have been promoted as excellent candidates for bio-technological applications including real time bio-sensing. In this work, SERS activities of nanodiamond, nano-β-SiC, DLC, thermally annealed diamond thin film surfaces were examined. DLC and thermally annealed diamond thin films were found to show SERS activity without any metal nanostructures on their surfaces. The observed SERS activities of the considered surfaces are explained in terms of the electromagnetic enhancement mechanism and charge transfer resonance process.
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Affiliation(s)
- Mohan Kumar Kuntumalla
- School of Engineering Sciences and Technology (SEST), University of Hyderabad, Hyderabad 500046, India.
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63
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Chemistry of one dimensional silicon carbide materials: Principle, production, application and future prospects. PROG SOLID STATE CH 2015. [DOI: 10.1016/j.progsolidstchem.2015.06.001] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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64
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Amato M, Rurali R. Shell-Thickness Controlled Semiconductor-Metal Transition in Si-SiC Core-Shell Nanowires. NANO LETTERS 2015; 15:3425-3430. [PMID: 25840046 DOI: 10.1021/acs.nanolett.5b00670] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We study Si-SiC core-shell nanowires by means of electronic structure first-principles calculations. We show that the strain induced by the growth of a lattice-mismatched SiC shell can drive a semiconductor-metal transition, which in the case of ultrathin Si cores is already observed for shells of more than one monolayer. Core-shell nanowires with thicker cores, however, remain semiconducting even when four SiC monolayers are grown, paving the way to versatile, biocompatible nanowire-based sensors.
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Affiliation(s)
- Michele Amato
- †Institut d'Electronique Fondamentale, UMR8622, CNRS, Université Paris Sud, 91405 Orsay, France
| | - Riccardo Rurali
- ‡Institut de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus de Bellaterra, 08193 Bellaterra, Barcelona, Spain
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65
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Yang L, Zhao H, Fan S, Li B, Li CP. A highly sensitive electrochemical sensor for simultaneous determination of hydroquinone and bisphenol A based on the ultrafine Pd nanoparticle@TiO2 functionalized SiC. Anal Chim Acta 2014; 852:28-36. [PMID: 25441876 DOI: 10.1016/j.aca.2014.08.037] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Revised: 08/06/2014] [Accepted: 08/11/2014] [Indexed: 02/05/2023]
Abstract
A titanium dioxide-silicon carbide nanohybrid (TiO2-SiC) with enhanced electrochemical performance was successfully prepared through a facile generic in situ growth strategy. Monodispersed ultrafine palladium nanoparticles (Pd NPs) with a uniform size of ∼2.3 nm were successfully obtained on the TiO2-SiC surface via a chemical reduction method. The Pd-loaded TiO2-SiC nanohybrid (Pd@TiO2-SiC) was characterized by transmission electron microscopy and X-ray diffractometry. A method for the simultaneous electrochemical determination of hydroquinone (HQ) and bisphenol A (BPA) using a Pd@TiO2-SiC nanocomposite-modified glassy carbon electrode was established. Utilizing the favorable properties of Pd NPs, the Pd@TiO2-SiC nanohybrid-modified glassy carbon electrode exhibited electrochemical performance superior to those of TiO2-SiC and SiC. Differential pulse voltammetry was successfully used to simultaneously quantify HQ and BPA within the concentration range of 0.01-200 μM under optimal conditions. The detection limits (S/N=3) of the Pd@TiO2-SiC nanohybrid electrode for HQ and BPA were 5.5 and 4.3 nM, respectively. The selectivity of the electrochemical sensor was improved by introducing 10% ethanol to the buffer medium. The practical application of the modified electrode was demonstrated by the simultaneous detection of HQ and BPA in tap water and wastewater samples. The simple and straightforward strategy presented in this paper are important for the facile fabrication of ultrafine metal NPs@metal oxide-SiC hybrids with high electrochemical performance and catalytic activity.
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Affiliation(s)
- Long Yang
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China
| | - Hui Zhao
- Laboratory for Conservation and Utilization of Bio-resource, Yunnan University, Kunming 650091, PR China
| | - Shuangmei Fan
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China
| | - Bingchan Li
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China
| | - Can-Peng Li
- School of Chemical Science and Technology, Yunnan University, Kunming 650091, PR China.
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66
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Label-free electrochemical immunosensor based on gold–silicon carbide nanocomposites for sensitive detection of human chorionic gonadotrophin. Biosens Bioelectron 2014; 57:199-206. [DOI: 10.1016/j.bios.2014.02.019] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 02/08/2014] [Accepted: 02/10/2014] [Indexed: 02/03/2023]
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67
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Wang T, Handschuh-Wang S, Yang Y, Zhuang H, Schlemper C, Wesner D, Schönherr H, Zhang W, Jiang X. Controlled surface chemistry of diamond/β-SiC composite films for preferential protein adsorption. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:1089-99. [PMID: 24410163 DOI: 10.1021/la404277p] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Diamond and SiC both process extraordinary biocompatible, electronic, and chemical properties. A combination of diamond and SiC may lead to highly stable materials, e.g., for implants or biosensors with excellent sensing properties. Here we report on the controllable surface chemistry of diamond/β-SiC composite films and its effect on protein adsorption. For systematic and high-throughput investigations, novel diamond/β-SiC composite films with gradient composition have been synthesized using the hot filament chemical vapor deposition (HFCVD) technique. As revealed by scanning electron microscopy (SEM), the diamond/β-SiC ratio of the composite films shows a continuous change from pure diamond to β-SiC over a length of ∼ 10 mm on the surface. X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectrometry (ToF-SIMS) was employed to unveil the surface termination of chemically oxidized and hydrogen treated surfaces. The surface chemistry of the composite films was found to depend on diamond/β-SiC ratio and the surface treatment. As observed by confocal fluorescence microscopy, albumin and fibrinogen were preferentially adsorbed from buffer: after surface oxidation, the proteins preferred to adsorb on diamond rather than on β-SiC, resulting in an increasing amount of proteins adsorbed to the gradient surfaces with increasing diamond/β-SiC ratio. By contrast, for hydrogen-treated surfaces, the proteins preferentially adsorbed on β-SiC, leading to a decreasing amount of albumin adsorbed on the gradient surfaces with increasing diamond/β-SiC ratio. The mechanism of preferential protein adsorption is discussed by considering the hydrogen bonding of the water self-association network to OH-terminated surfaces and the change of the polar surface energy component, which was determined according to the van Oss method. These results suggest that the diamond/β-SiC gradient film can be a promising material for biomedical applications which require good biocompatibility and selective adsorption of proteins and cells to direct cell migration.
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Affiliation(s)
- Tao Wang
- Institute of Materials Engineering, University of Siegen , Paul-Bonatz-Straße 9-11, 57076 Siegen, Germany
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