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Zhang X, Sinha TK, Kim JK, Oh JS, Lee J. Fabrication of graphene reinforced silicone‐based 3D printed tactile sensor: An approach towards an applicable piezo‐sensor. J Appl Polym Sci 2022. [DOI: 10.1002/app.52341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xiaojie Zhang
- School of Materials Science and Engineering Nanchang Hangkong University Nanchang China
- Department of Materials Engineering and Convergence Technology, Engineering Research Institute Gyeongsang National University Jinju South Korea
| | - Tridib Kumar Sinha
- Department of Materials Engineering and Convergence Technology, Engineering Research Institute Gyeongsang National University Jinju South Korea
- Department of Applied Sciences, School of Engineering University of Petroleum & Energy Studies (UPES) Dehradun India
| | - Jin Kuk Kim
- Department of Materials Engineering and Convergence Technology, Engineering Research Institute Gyeongsang National University Jinju South Korea
| | - Jeong Seok Oh
- Department of Materials Engineering and Convergence Technology, Engineering Research Institute Gyeongsang National University Jinju South Korea
| | - Jinho Lee
- Department of Physics Education and the Research Institute of Natural Science Gyeongsang National University Jinju South Korea
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Barhoumi M, Abboud A, Debbichi L, Said M, Björkman T, Rocca D, Lebègue S. Electronic properties of several two dimensional halides from ab initio calculations. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2019; 10:823-832. [PMID: 31019869 PMCID: PMC6466728 DOI: 10.3762/bjnano.10.82] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Accepted: 03/19/2019] [Indexed: 06/09/2023]
Abstract
Using density functional theory, we study the electronic properties of several halide monolayers. We show that their electronic bandgaps, as obtained with the HSE hybrid functional, range between 3.0 and 7.5 eV and that their phonon spectra are dynamically stable. Additionally, we show that under an external electric field some of these systems exhibit a semiconductor-to-metal transition.
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Affiliation(s)
- Mohamed Barhoumi
- Laboratoire de la Matière Condensée et des Nanosciences (LMCN), Université de Monastir, Département de Physique, Faculté des Sciences de Monastir, Avenue de l’Environnement, 5019 Monastir, Tunisia
| | - Ali Abboud
- Laboratoire de Physique et Chimie Théoriques (LPCT, UMR CNRS 7019) Institut Jean Barriol, Université de Lorraine, BP 239, Boulevard des Aiguillettes 54506 Vandoeuvre-lès-Nancy, France
| | - Lamjed Debbichi
- Graduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Yuseong-gu, Daejeon 305-701, Korea
| | - Moncef Said
- Laboratoire de la Matière Condensée et des Nanosciences (LMCN), Université de Monastir, Département de Physique, Faculté des Sciences de Monastir, Avenue de l’Environnement, 5019 Monastir, Tunisia
| | - Torbjörn Björkman
- Physics/Department of Natural Sciences, Åbo Akademi University, Porthansgatan 3, 20500 Turku, Finland
| | - Dario Rocca
- Laboratoire de Physique et Chimie Théoriques (LPCT, UMR CNRS 7019) Institut Jean Barriol, Université de Lorraine, BP 239, Boulevard des Aiguillettes 54506 Vandoeuvre-lès-Nancy, France
| | - Sébastien Lebègue
- Laboratoire de Physique et Chimie Théoriques (LPCT, UMR CNRS 7019) Institut Jean Barriol, Université de Lorraine, BP 239, Boulevard des Aiguillettes 54506 Vandoeuvre-lès-Nancy, France
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Liang W, Ge X, Ge J, Li T, Zhao T, Chen X, Song Y, Cui Y, Khan M, Ji J, Pang X, Liu R. Reduced Graphene Oxide Embedded with MQ Silicone Resin Nano-Aggregates for Silicone Rubber Composites with Enhanced Thermal Conductivity and Mechanical Performance. Polymers (Basel) 2018; 10:E1254. [PMID: 30961180 PMCID: PMC6401955 DOI: 10.3390/polym10111254] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Revised: 11/06/2018] [Accepted: 11/06/2018] [Indexed: 11/16/2022] Open
Abstract
With developments of the electronics industry, more components are being included in electronic devices, which has led to challenges in thermal management. Using reduced graphene oxide embedded with MQ silicone resin (RGO/MQ) nano-aggregates as the composite filler and silicone rubber (SR) as the matrix, a simple approach is designed to prepare RGO/MQ/SR composites. Reduced graphene oxide (RGO) was first used as a substrate for the growth of MQ silicone resin by hybridization, forming sandwich-like micro structured RGO/MQ nano-aggregates successfully. Then, RGO/MQ was integrated into α,ω-dihydroxylpolydimethylsiloxane based on the in situ solvent-free blending method, followed by condensation and vulcanization, fabricating the final RGO/MQ/SR composites. The effective strategy could enhance the adaptability between graphene and silicone matrix under external stimuli at room temperature by embedding nanoscale MQ into the interface of graphene/silicone as the buffer layer. Obvious improvements were found in both thermal conductivity and mechanical properties due to excellent dispersion and interfacial compatibility of RGO/MQ in the host materials. These attractive results suggest that this RGO/MQ/SR composite has potential as a thermal interface material for heat dissipation applications.
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Affiliation(s)
- Weijie Liang
- Shaanxi Engineering Laboratory of Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China; (T.Z.).
| | - Xin Ge
- Guangdong Engineering Research Center of Silicone Electronic Fine Chemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China.
| | - Jianfang Ge
- Guangdong Engineering Research Center of Silicone Electronic Fine Chemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China.
| | - Tiehu Li
- Shaanxi Engineering Laboratory of Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China; (T.Z.).
| | - Tingkai Zhao
- Shaanxi Engineering Laboratory of Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China; (T.Z.).
| | - Xunjun Chen
- Guangdong Engineering Research Center of Silicone Electronic Fine Chemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China.
| | - Yaozhen Song
- Guangdong Engineering Research Center of Silicone Electronic Fine Chemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China.
| | - Yingde Cui
- Guangzhou Vocational College of Science and Technology, Guangzhou 510550, China.
| | - Muhammad Khan
- Shaanxi Engineering Laboratory of Graphene New Carbon Materials and Applications, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China; (T.Z.).
| | - Jianye Ji
- Guangdong Engineering Research Center of Silicone Electronic Fine Chemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China.
| | - Xiaoyan Pang
- Guangdong Engineering Research Center of Silicone Electronic Fine Chemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China.
| | - Ruoling Liu
- Guangdong Engineering Research Center of Silicone Electronic Fine Chemicals, College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou 510225, China.
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Conformational equilibrium in dimethylvinylsilane and dimethylvinylsilane-d1 studied by infrared and Raman spectroscopy and by ab initio calculations. J Mol Struct 2003. [DOI: 10.1016/s0022-2860(03)00519-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Durig JR, Hur SW, Guirgis GA. Infrared and Raman spectra, conformational stability, vibrational assignment and ab initio calculations of methylvinyl silyl chloride. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2003; 59:2449-2471. [PMID: 12963442 DOI: 10.1016/s1386-1425(02)00379-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The infrared spectra (3200-50 cm(-1)) of gaseous and solid and Raman spectra (3200-10 cm(-1)) of the liquid and solid methylvinyl silyl chloride, CH(2)=CHSiH(CH(3))Cl, and the Si-d isotopomer have been recorded. The three expected stable conformers (the three different groups eclipsing the double bond) have been identified in the fluid phase, but it was not possible to obtain an annealed solid with a single conformer. Variable temperature (-105 to -150 degrees C) studies of the infrared spectra of the sample dissolved in liquid krypton has been carried out. From these data the enthalpy differences between the most stable conformer with the hydrogen atom (HE) eclipsing the double bond to that with the chlorine atom (ClE) and the methyl group (ME) eclipsing the double bond have been determined to be 17+/-4 cm(-1) (203+/-48 Jmol(-1)) and 80+/-12 cm(-1) (957+/-144 Jmol(-1)), respectively. However in the liquid state the ME conformer is the most stable form with enthalpy differences of 13+/-4 and 27+/-7 cm(-1) to the HE and ClE rotamers, respectively. It is estimated that there is 39% of the HE conformer, 35% of the ClE conformer, and 26% of the ME conformer present at ambient temperature. A complete vibration assignment is proposed for the HE conformer which is based on infrared band contours and group frequencies, which is supported by normal coordinate calculations utilizing the force constants from ab initio MP2/6-31G(d) calculations. Additionally, several of the fundamentals for the other two conformers have been assigned. The optimal geometries, conformational stabilities, harmonic force fields, infrared intensities, Raman activities, depolarization ratios, and vibrational frequencies are reported for all three conformers from MP2/6-31G(d,p) ab initio calculations with full electron correlation. Optimized geometrical parameters and conformational stabilities have been obtained from MP2/6-311+G(d,p) calculations. At this highest level of calculations, the HE conformer is predicted to be more stable by 62 and 84 cm(-1) than the ME and ClE conformers, respectively. The coefficients from the potential function governing the conformational interchange have been obtained from the MP2/6-31G(d) ab initio calculations. By utilizing the frequency of the SiH stretching mode, the r(0)-H distance has been determined to be 1.481 A for the HE conformer. The ab initio calculated quantities are compared to the experimentally determined values where applicable, as well as to some corresponding results for some similar molecules.
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Affiliation(s)
- James R Durig
- Department of Chemistry, University of Missouri--Kansas City, 5100 Rockhill Road, Kansas City, MO 64110-2499, USA.
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Guirgis GA, Zheng C, Shen S, Durig JR. Spectra and structure of silicon containing compounds XXXVII, comparison of experimentally determined enthalpy differences of the conformers of CH2CHSiClnY3−n (Y=H or CH3, n=1 or 2) with theoretical values. J Mol Struct 2003. [DOI: 10.1016/s0022-2860(03)00122-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Bell S, Dines TJ. An Ab Initio Study of the Structures and Vibrational Spectra of Chromium Oxo-Anions and Oxyhalides. J Phys Chem A 2000. [DOI: 10.1021/jp002312u] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Stephen Bell
- Department of Chemistry, University of Dundee, Dundee DD1 4HN, United Kingdom
| | - Trevor J. Dines
- Department of Chemistry, University of Dundee, Dundee DD1 4HN, United Kingdom
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Horn A, Klaeboe P, Aleksa V, Gruodis A, Nielsen C, Nashed Y, Guirgis G, Durig J. Conformational equilibrium in dimethyl vinyl fluorosilane studied by infrared and Raman spectroscopy. J Mol Struct 2000. [DOI: 10.1016/s0022-2860(00)00677-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Johansen T, Hagen K, Hassler K, Richardson A, Pätzold U, Stølevik R. Vinyl dichlorosilane and vinyl dibromosilane (H2CCH–SiHX2,X=Cl,Br): conformational structure and vibrational properties determined by gas-phase electron diffraction, ab initio molecular orbital calculations, and variable-temperature Raman spectroscopy. J Mol Struct 2000. [DOI: 10.1016/s0022-2860(00)00390-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Raman and infrared spectra, conformational stability, ab initio calculations and vibrational assignments for 2-chloroethyl silane. J Mol Struct 1999. [DOI: 10.1016/s0022-2860(99)00033-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Guirgis GA, Nashed YE, Klaeboe P, Durig JR. Conformational stabilities, ab initio calculations and structural parameters for 2-chloroethyl silane and 2-chloroethyl trifluorosilane. J Mol Struct 1999. [DOI: 10.1016/s0022-2860(98)00768-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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