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Das RP, Singh BG, Aishwarya J, Kumbhare LB, Kunwar A. 3,3'-Diselenodipropionic acid immobilised gelatin gel: a biomimic catalytic nitric oxide generating material for topical wound healing application. Biomater Sci 2023; 11:1437-1450. [PMID: 36602012 DOI: 10.1039/d2bm01964g] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Nitric oxide (NO) plays a pivotal role in the wound healing process and promotes the generation of healthy endothelium. In this work, a simple method has been developed for fabricating a diselenide grafted gelatin gel, which reduces NO donors such as S-nitroso-N-acetylpenicillamine (SNAP) by glutathione peroxidase-like mechanism to produce NO. Briefly, the process involved covalently conjugating 3,3'-diselenodipropionic acid (DSePA) with gelatin via carbodiimide coupling. The resulting gelatin-DSePA conjugate (G-Se-Se-G) demonstrated NO production upon incubation with SNAP and glutathione (GSH) with the flux of 4.8 ± 0.6 nmol cm-2 min-1 and 1.6 ± 0.1 nmol cm-2 min-1 at 10 min and 40 min, respectively. The G-Se-Se-G recovered even after 5 days of incubation with the reaction mixture retaining catalytic activity up to 74%. Subsequently, G-Se-Se-G was suspended (5% w/v) in water with lecithin (6% w/w of gelatin) and F127 (3% w/w of gelatin) to prepare gel through temperature dependant gelation method. The fabricated G-Se-Se-G gel exhibited desirable rheological characteristics and excellent mechanical stability under storage conditions and did not cause any significant toxicity in normal human keratinocytes (HaCaT) and fibroblast cells (WI38) up to 50 μg ml-1 of selenium equivalent. Finally, mice studies confirmed that topically applied G-Se-Se-G gel and SNAP promoted faster epithelization and collagen deposition at the wound site. In conclusion, the development of a biomimetic NO generating gel with sustained activity and biocompatibility was achieved.
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Affiliation(s)
- Ram P Das
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai-400094, India
| | - Beena G Singh
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai-400094, India
| | - J Aishwarya
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai-400094, India.,Advanced Centre for Treatment, Research and Education in Cancer, Mumbai-410210, India
| | - Liladhar B Kumbhare
- Chemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India
| | - Amit Kunwar
- Radiation & Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400085, India. .,Homi Bhabha National Institute, Anushaktinagar, Mumbai-400094, India
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2
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Yang S, Zhang Z, Xian Q, Song Q, Liu Y, Gao Y, Wen W. An Aluminum-Based Microfluidic Chip for Polymerase Chain Reaction Diagnosis. Molecules 2023; 28:molecules28031085. [PMID: 36770751 PMCID: PMC9921548 DOI: 10.3390/molecules28031085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 01/13/2023] [Accepted: 01/18/2023] [Indexed: 01/24/2023] Open
Abstract
Real-time polymerase chain reaction (real-time PCR) tests were successfully conducted in an aluminum-based microfluidic chip developed in this work. The reaction chamber was coated with silicone-modified epoxy resin to isolate the reaction system from metal surfaces, preventing the metal ions from interfering with the reaction process. The patterned aluminum substrate was bonded with a hydroxylated glass mask using silicone sealant at room temperature. The effect of thermal expansion was counteracted by the elasticity of cured silicone. With the heating process closely monitored, real-time PCR testing in reaction chambers proceeded smoothly, and the results show similar quantification cycle values to those of traditional test sets. Scanning electron microscope (SEM) and atomic force microscopy (AFM) images showed that the surface of the reaction chamber was smoothly coated, illustrating the promising coating and isolating properties. Energy-dispersive X-ray spectroscopy (EDS), X-ray photoelectron spectroscopy (XPS), and inductively coupled plasma-optical emission spectrometer (ICP-OES) showed that no metal ions escaped from the metal to the chip surface. Fourier-transform infrared spectroscopy (FTIR) was used to check the surface chemical state before and after tests, and the unchanged infrared absorption peaks indicated the unreacted, antifouling surface. The limit of detection (LOD) of at least two copies can be obtained in this chip.
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Affiliation(s)
- Siyu Yang
- Division of Emerging Interdisciplinary Areas, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Ziyi Zhang
- Division of Emerging Interdisciplinary Areas, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Qingyue Xian
- Division of Emerging Interdisciplinary Areas, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Qi Song
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Yiteng Liu
- Division of Emerging Interdisciplinary Areas, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Yibo Gao
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
| | - Weijia Wen
- Department of Physics, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR 999077, China
- Thrust of Advanced Materials, The Hong Kong University of Science and Technology (Guangzhou), Nansha, Guangzhou 511400, China
- HKUST Shenzhen-Hong Kong Collaborative Innovation Research Institute, Futian, Shenzhen 518000, China
- Correspondence: ; Tel.: +852-2358-5781
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3
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Qiu C, Luo J, Ling Y, Lu Z, Ni L, Chen Y, Zou H, Heng Z, Liang M. Thermal Degradation Behavior and Mechanism of Organosilicon Modified Epoxy Resin. MACROMOL CHEM PHYS 2022. [DOI: 10.1002/macp.202200164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chen Qiu
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu 610065 China
| | - Jiemin Luo
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu 610065 China
| | - Youquan Ling
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu 610065 China
| | - Zhaohui Lu
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu 610065 China
| | - Long Ni
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu 610065 China
| | - Yang Chen
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu 610065 China
| | - Huawei Zou
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu 610065 China
| | - Zhengguang Heng
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu 610065 China
| | - Mei Liang
- State Key Laboratory of Polymer Materials Engineering Polymer Research Institute of Sichuan University Chengdu 610065 China
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A self-assembled nanostructure from an amphiphilic aromatic polyester containing siloxane and poly(phenylene oxide) in epoxy resin. JOURNAL OF POLYMER RESEARCH 2022. [DOI: 10.1007/s10965-022-03094-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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5
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Improving Epoxy Resin Performance Using PPG and MDI by One-Step Modification. Processes (Basel) 2022. [DOI: 10.3390/pr10050929] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/10/2022] Open
Abstract
The toughening modification of epoxy resin by polyurethane prepolymer (PU) can effectively solve the disadvantage of high brittleness in its application. In this study, a convenient way to toughen epoxy resins was explored, and the monomers PPG and MDI for the synthesis of polyurethane prepolymers were used for a one-step modification of epoxy resins. The test results of viscosity and elongation at break showed that P-M reduced the viscosity of the epoxy resin and improved the toughness. Especially when the content of P-M was 25%, the elongation at the break of the modified EP reached 196.56%. From a thermogravimetric and pyrolysis kinetic analysis, the P-M modification had better thermal stability than the PU modification. These findings have particular implications for the toughening and engineering applications of epoxy resins.
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Arcos-Casarrubias JA, Vázquez-Torres H, Granados-Olvera JA, Cedeño AJ, Cervantes-Uc JM. Viscoelastic behavior and toughness of the DGEBA epoxy resin with 1,2-diaminocyclohexane: effect of functionalized poly(dimethylsiloxane), diglycidyl ether, PDMS-DGE, pre-reacted with 1,2-diaminocyclohexane. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-03607-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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7
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Forouzanfar S, Pala N, Madou M, Wang C. Perspectives on C-MEMS and C-NEMS biotech applications. Biosens Bioelectron 2021; 180:113119. [PMID: 33711652 DOI: 10.1016/j.bios.2021.113119] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2020] [Revised: 02/19/2021] [Accepted: 02/25/2021] [Indexed: 02/04/2023]
Abstract
Carbon microelectromechanical system (C-MEMS) and carbon nanoelectromechanical system (C-NEMS) have been identified as promising technologies for a range of biotech applications, including electrochemical biosensors, biofuel cells, neural probes, and dielectrophoretic cell trapping. Research teams around the world have devoted more and more time to this field. After almost two decades of efforts on developing C-MEMS and C-NEMS, a review of the relevant progress and addressing future research opportunities and critical issues is in order. This review first introduces C-MEMS and C-NEMS fabrication processes that fall into two categories: photolithography- and non-photolithography- based techniques. Next, a detailed discussion of the state of the art, and technical challenges and opportunities associated with C-MEMS and C-NEMS devices used in biotech applications are presented. These devices are discussed in the relevant sub-sections of biosensors, biofuel cells, intracorporeal neural probe, dielectrophoresis cell trapping, and cell culture. The review concludes with an exposition of future perspectives in C-MEMS and C-NEMS.
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Affiliation(s)
- Shahrzad Forouzanfar
- Electrical and Computer Engineering, Florida International University, United States
| | - Nezih Pala
- Electrical and Computer Engineering, Florida International University, United States
| | - Marc Madou
- Mechanical and Aerospace Engineering, University of California Irvine, United States
| | - Chunlei Wang
- Mechanical and Materials Engineering, Florida International University, United States; Center for Study of Matter at Extreme Conditions, Florida International University, United States.
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8
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Zhen X, Li W, Wu J, Jin X, Wu J, Chen K, Gan W. Effect of tertiary polysiloxane on the phase separation and properties of epoxy/
PEI
blend. J Appl Polym Sci 2021. [DOI: 10.1002/app.49672] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xueqian Zhen
- College of Chemistry and Chemical Engineering Shanghai University of Engineering Science Shanghai China
| | - Weizhen Li
- College of Chemistry and Chemical Engineering Shanghai University of Engineering Science Shanghai China
| | - Jiaming Wu
- College of Chemistry and Chemical Engineering Shanghai University of Engineering Science Shanghai China
| | - Xulong Jin
- College of Chemistry and Chemical Engineering Shanghai University of Engineering Science Shanghai China
| | - Jiating Wu
- College of Chemistry and Chemical Engineering Shanghai University of Engineering Science Shanghai China
| | - Kaimin Chen
- College of Chemistry and Chemical Engineering Shanghai University of Engineering Science Shanghai China
| | - Wenjun Gan
- College of Chemistry and Chemical Engineering Shanghai University of Engineering Science Shanghai China
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Wu JT, Li WZ, Wang SL, Gan WJ. Phase separation of ternary epoxy/PEI blends with higher molecular weight of tertiary component polysiloxane. RSC Adv 2021; 11:37830-37841. [PMID: 35498113 PMCID: PMC9044016 DOI: 10.1039/d1ra05979c] [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: 08/07/2021] [Accepted: 11/17/2021] [Indexed: 12/02/2022] Open
Abstract
A tertiary component with higher molecular weight of epoxy terminated polysiloxane (DMS-E11) was incorporated into the diglycidyl ether of bisphenol-A (DGEBA)/thermoplastic polyetherimide (PEI) blends. In this ternary DGEBA/PEI/DMS-E11 system, 25 or 30 wt% PEI and no more than 20 wt% DMS-E11 were used to ensure the formation of a continuous PEI-rich phase via reaction induced phase separation for optimum mechanical properties of blends. The results of morphology monitoring by OM and TRLS indicated that the addition of DMS-E11 could accelerate phase separation of DGEBA/PEI. Obvious differences were observed by SEM/EDS in the final morphologies of the blends. DMS-E11 localized in the PEI-rich phase continuously while it separated with DGEBA into spherical particles in the DGEBA-rich phase. DMA measurements found that the storage modulus and Tg decreased with DMS-E11 content but were compensated partly by the presence of PEI. The results of tensile tests confirmed the synergistic strengthening for epoxy resin from PEI and DMS-E11. Effect of higher molecular weight epoxy-terminated polysiloxane DMS-E11 on morphologies and properties of DGEBA/PEI blends.![]()
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Affiliation(s)
- Jia-ting Wu
- Shanghai University of Engineering Science, College of Chemistry and Chemical Engineering, 333 Longteng Road, Shanghai 201620, People's Republic of China
| | - Wei-zhen Li
- Shanghai University of Engineering Science, College of Chemistry and Chemical Engineering, 333 Longteng Road, Shanghai 201620, People's Republic of China
| | - Shu-long Wang
- Shanghai University of Engineering Science, College of Chemistry and Chemical Engineering, 333 Longteng Road, Shanghai 201620, People's Republic of China
| | - Wen-jun Gan
- Shanghai University of Engineering Science, College of Chemistry and Chemical Engineering, 333 Longteng Road, Shanghai 201620, People's Republic of China
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10
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Jiménez-Suárez A, Del Rosario G, Sánchez-Romate XX, Prolongo SG. Influence of Morphology on the Healing Mechanism of PCL/Epoxy Blends. MATERIALS 2020; 13:ma13081941. [PMID: 32326035 PMCID: PMC7215671 DOI: 10.3390/ma13081941] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Revised: 04/11/2020] [Accepted: 04/17/2020] [Indexed: 11/16/2022]
Abstract
Polycaprolactone (PCL) is being researched as a self-healing agent blended with epoxy resins by several reasons: low melting point, differential expansive bleeding (DBE) of PCL, and reaction induced phase separation (RIPS) of PCL/epoxy blends. In this work, PCL/epoxy blends were prepared with different PCL ratios and two different epoxy networks, cured with aliphatic and aromatic amine hardeners. The curing kinetic affects to the blend morphology, varying its critical composition. The self-healing behavior is strongly affected by the blend morphology, reaching the maximum efficiency for co-continuous phases. Blends with dispersed PCL phase into epoxy matrix can also show high self-healing efficiency because of the low PCL domains that act as reservoir of self-healing agent. In this last case, it was confirmed that the most efficient self-healable blends are one whose area occupied by PCL phase is the largest. These blends remain the good thermal and mechanical behavior of epoxy matrix, in contrast to the worsened properties of blends with bicontinuous morphology. In this work, the self-healing mechanism of blends is studied in depth by scanning electron microscopy. Furthermore, the influence of the geometry of the initial surface damage is also evaluated, affecting to the measurement of self-healing efficiency.
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Affiliation(s)
- Alberto Jiménez-Suárez
- Area of Materials Science and Engineering, ESCET-University Rey Juan Carlos, c/Tulipán s/n, 28933 Móstoles, Madrid, Spain; (A.J.-S.); (X.X.S.-R.)
| | - Gilberto Del Rosario
- Technological Center Support, University Rey Juan Carlos, c/Tulipán s/n, 28933 Móstoles, Madrid, Spain;
| | - Xoan Xosé Sánchez-Romate
- Area of Materials Science and Engineering, ESCET-University Rey Juan Carlos, c/Tulipán s/n, 28933 Móstoles, Madrid, Spain; (A.J.-S.); (X.X.S.-R.)
| | - Silvia González Prolongo
- Area of Materials Science and Engineering, ESCET-University Rey Juan Carlos, c/Tulipán s/n, 28933 Móstoles, Madrid, Spain; (A.J.-S.); (X.X.S.-R.)
- Correspondence:
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11
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Mlela MK, Xu H, Sun F, Wang H, Madenge GD. Material Analysis and Molecular Dynamics Simulation for Cavitation Erosion and Corrosion Suppression in Water Hydraulic Valves. MATERIALS 2020; 13:ma13020453. [PMID: 31963538 PMCID: PMC7014062 DOI: 10.3390/ma13020453] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 01/10/2020] [Accepted: 01/13/2020] [Indexed: 12/02/2022]
Abstract
In the milestone of straggling to make water hydraulics more advantageous, the choice of coating polymer for water hydraulics valves plays an essential role in alleviating the impact of cavitation erosion and corrosion, and this is a critical task for designers. Fulfilling the appropriate selection, we conflicted properties that are vital for erosion and corrosion inhibitors, as well as the tribology in the sense of coefficient of friction. This article aimed to choose the best alternative polymer for coating on the selected substrate, that is, Cr2O3, Al2O3, Ti2O3. By applying PROMETHEE (Preference Ranking Organization Method for Enrichment Evaluations), the best polymer obtained with an analyzed performance attribute is Polytetrafluoroethylene (PTFE) that comes up with higher outranking (0.5932052). A Molecular Dynamics (MD) simulation was conducted to identify the stronger bonding with the regards of the better cleave plane between Polytetrafluoroethylene (PTFE) and the selected substrate. Polytetrafluoroethylene (PTFE)/Al2O3 cleaved in (010) plane was observed to be the strongest bond in terms of binding energy (3188 kJ/mol) suitable for further studies.
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Affiliation(s)
- Masoud Kamoleka Mlela
- College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China; (M.K.M.); (F.S.); (H.W.)
| | - He Xu
- College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China; (M.K.M.); (F.S.); (H.W.)
- Correspondence: ; Tel.: +86-133-5111-7608
| | - Feng Sun
- College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China; (M.K.M.); (F.S.); (H.W.)
| | - Haihang Wang
- College of Mechanical and Electrical Engineering, Harbin Engineering University, Harbin 150001, China; (M.K.M.); (F.S.); (H.W.)
| | - Gabriel Donald Madenge
- College of Aerospace and Civil Engineering, Harbin Engineering University, Harbin 150001, China;
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Aradhana R, Mohanty S, Nayak SK. Synergistic effect of polypyrrole and reduced graphene oxide on mechanical, electrical and thermal properties of epoxy adhesives. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.02.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Sharma S. Glassy Carbon: A Promising Material for Micro- and Nanomanufacturing. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1857. [PMID: 30274225 PMCID: PMC6213281 DOI: 10.3390/ma11101857] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/20/2018] [Revised: 09/13/2018] [Accepted: 09/18/2018] [Indexed: 12/12/2022]
Abstract
When certain polymers are heat-treated beyond their degradation temperature in the absence of oxygen, they pass through a semi-solid phase, followed by the loss of heteroatoms and the formation of a solid carbon material composed of a three-dimensional graphenic network, known as glassy (or glass-like) carbon. The thermochemical decomposition of polymers, or generally of any organic material, is defined as pyrolysis. Glassy carbon is used in various large-scale industrial applications and has proven its versatility in miniaturized devices. In this article, micro and nano-scale glassy carbon devices manufactured by (i) pyrolysis of specialized pre-patterned polymers and (ii) direct machining or etching of glassy carbon, with their respective applications, are reviewed. The prospects of the use of glassy carbon in the next-generation devices based on the material's history and development, distinct features compared to other elemental carbon forms, and some large-scale processes that paved the way to the state-of-the-art, are evaluated. Selected support techniques such as the methods used for surface modification, and major characterization tools are briefly discussed. Barring historical aspects, this review mainly covers the advances in glassy carbon device research from the last five years (2013⁻2018). The goal is to provide a common platform to carbon material scientists, micro/nanomanufacturing experts, and microsystem engineers to stimulate glassy carbon device research.
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Affiliation(s)
- Swati Sharma
- Karlsruhe Institute of Technology, Institute of Microstructure Technology, Hermann-von-Helmholtz-Platz 1, 76334 Eggenstein-Leopoldshafen, Germany.
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