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Parvaiz MS, Shah KA, Alrobei H, Dar G, Khanday FA, Muzaffar Ali Andrabi S, Hamid R. Modeling and simulation of carbon nanotube amino-acid sensor: A first-principles study. COMPUT THEOR CHEM 2021. [DOI: 10.1016/j.comptc.2021.113402] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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2
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Charge localization and hopping in a topologically engineered graphene nanoribbon. Sci Rep 2021; 11:5142. [PMID: 33664310 PMCID: PMC7933356 DOI: 10.1038/s41598-021-84626-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2020] [Accepted: 01/21/2021] [Indexed: 01/31/2023] Open
Abstract
Graphene nanoribbons (GNRs) are promising quasi-one-dimensional materials with various technological applications. Recently, methods that allowed for the control of GNR's topology have been developed, resulting in connected nanoribbons composed of two distinct armchair GNR families. Here, we employed an extended version of the Su-Schrieffer-Heeger model to study the morphological and electronic properties of these novel GNRs. Results demonstrated that charge injection leads to the formation of polarons that localize strictly in the 9-AGNRs segments of the system. Its mobility is highly impaired by the system's topology. The polaron displaces through hopping between 9-AGNR portions of the system, suggesting this mechanism for charge transport in this material.
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3
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Schneider S, Hoffmann-Vogel R. Electrostatic forces above graphene nanoribbons and edges interpreted as partly hydrogen-free. NANOSCALE 2020; 12:17895-17901. [PMID: 32844849 DOI: 10.1039/d0nr03348k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Graphene nanoribbons' electronic transport properties strongly depend on the type of edge, armchair, zigzag or other, and on edge functionalization that can be used for band-gap engineering. For only partly hydrogenated edges interesting magnetic properties are predicted. Electric charge accumulates at edges and corners. Scanning force microscopy has so far shown the centre of graphene nanoribbons with atomic resolution using a quartz crystal tuning fork sensor of high stiffness. Weak long-range electrostatic forces related to the charge accumulation on the edges of graphene nanoribbons could not be imaged so far. Here, we show the electrostatic forces at the corners and edges of graphene nanoribbons are amenable to measurement. We use soft cantilevers and a bimodal imaging technique to combine enhanced sensitivity to weak long-range electrostatic forces with the high resolution of the second-frequency shift. Additionally, in our work the edges of the nanoribbons are mainly hydrogen-free, opening to the route to investigations of partly hydrogenated magnetic nanoribbons.
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Affiliation(s)
- Sebastian Schneider
- Physikalisches Institut, Karlsruhe Institute of Technology, Karlsruhe, Germany
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4
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Affiliation(s)
- Aniekan Magnus Ukpong
- Theoretical and Computational Condensed Matter and Materials Physics Group, School of Chemistry and Physics, College of Agriculture, Engineering and Science, University of KwaZulu-Natal, Pietermaritzburg, South Africa
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5
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Zdetsis AD. Bridging the Physics and Chemistry of Graphene(s): From Hückel’s Aromaticity to Dirac’s Cones and Topological Insulators. J Phys Chem A 2020; 124:976-986. [DOI: 10.1021/acs.jpca.9b11564] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aristides D. Zdetsis
- Molecular Engineering Laboratory, Department of Physics, University of Patras, Patras 26500, Greece
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6
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de Sousa Araújo Cassiano T, Monteiro FF, Evaristo de Sousa L, Magela e Silva G, de Oliveira Neto PH. Smooth gap tuning strategy for cove-type graphene nanoribbons. RSC Adv 2020; 10:26937-26943. [PMID: 35515758 PMCID: PMC9055501 DOI: 10.1039/d0ra02997a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Accepted: 06/29/2020] [Indexed: 11/21/2022] Open
Abstract
We investigated an edge transformation in cove-type graphene nanoribbons based on changing the balance of zig-zag and armchair chains.
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7
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Sarmah A, Hobza P. Sequential BN-doping induced tuning of electronic properties in zigzag-edged graphene nanoribbons: a computational approach. RSC Adv 2018; 8:10964-10974. [PMID: 35541531 PMCID: PMC9078980 DOI: 10.1039/c8ra00386f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Accepted: 03/06/2018] [Indexed: 11/21/2022] Open
Abstract
We employed first-principles methods to elaborate doping induced electronic and magnetic perturbations in one-dimensional zigzag graphene nanoribbon (ZGNR) superlattices. Consequently, the incorporation of alternate boron and nitrogen (hole-electron) centers into the hexagonal network instituted substantial modulations to electronic and magnetic properties of ZGNR. Our theoretical analysis manifested some controlled changes to electronic and magnetic properties of the ZGNR by tuning the positions (array) of impurity centers in the carbon network. Subsequent DFT based calculations also suggested that the site-specific alternate electron-hole (B/N) doping could regulate the band-gaps of the superlattices within a broad range of energy. The consequence of variation in the width of ZGNR in the electronic environment of the system was also tested. The systematic analysis of various parameters such as the structural orientations, spin-arrangements, the density of states (DOS), band structures, and local density of states envisioned a basis for the band-gap engineering in ZGNR and attributed to its feasible applications in next generation electronic device fabrication.
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Affiliation(s)
- Amrit Sarmah
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo nam. 2, CZ-16610 Prague 6 Czech Republic +420 731015016
| | - Pavel Hobza
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences Flemingovo nam. 2, CZ-16610 Prague 6 Czech Republic +420 731015016
- Department of Physical Chemistry, Palacký University CZ-77146 Olomouc Czech Republic
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8
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Zeng M, Xiao Y, Liu J, Yang K, Fu L. Exploring Two-Dimensional Materials toward the Next-Generation Circuits: From Monomer Design to Assembly Control. Chem Rev 2018; 118:6236-6296. [DOI: 10.1021/acs.chemrev.7b00633] [Citation(s) in RCA: 298] [Impact Index Per Article: 49.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Mengqi Zeng
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Yao Xiao
- The Institute for Advanced Studies (IAS), Wuhan University, Wuhan 430072, China
| | - Jinxin Liu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Kena Yang
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
| | - Lei Fu
- College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, China
- The Institute for Advanced Studies (IAS), Wuhan University, Wuhan 430072, China
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10
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Makino M, Nishina N, Aihara JI. Critical evaluation of HOMA and MBL as local aromaticity indices. J PHYS ORG CHEM 2017. [DOI: 10.1002/poc.3783] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Masakazu Makino
- Department of Environmental and Life Sciences, School of Food and Nutritional Sciences; University of Shizuoka; Shizuoka Japan
| | - Naoko Nishina
- Department of Chemistry, Faculty of Science; Shizuoka University; Shizuoka Japan
| | - Jun-ichi Aihara
- Department of Environmental and Life Sciences, School of Food and Nutritional Sciences; University of Shizuoka; Shizuoka Japan
- Department of Chemistry, Faculty of Science; Shizuoka University; Shizuoka Japan
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11
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Stuyver T, Fias S, De Proft F, Geerlings P, Tsuji Y, Hoffmann R. Enhancing the conductivity of molecular electronic devices. J Chem Phys 2017. [DOI: 10.1063/1.4972992] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
- Thijs Stuyver
- QCMM Ghent−Brussels Alliance Group and Algemene Chemie, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
- Research Foundation-Flanders (FWO-Vlaanderen), Egmontstraat 5, 1000 Brussels, Belgium
| | - Stijn Fias
- QCMM Ghent−Brussels Alliance Group and Algemene Chemie, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Frank De Proft
- QCMM Ghent−Brussels Alliance Group and Algemene Chemie, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Paul Geerlings
- QCMM Ghent−Brussels Alliance Group and Algemene Chemie, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Yuta Tsuji
- Education Center for Global Leaders in Molecular Systems for Devices, Kyushu University, Nishi-ku, Fukuoka 819-0395, Japan
| | - Roald Hoffmann
- Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, USA
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12
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Nishina N, Makino M, Aihara JI. Aromatic Character of Irregular-Shaped Nanographenes. J Phys Chem A 2016; 120:2431-42. [PMID: 27030605 DOI: 10.1021/acs.jpca.6b00972] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We found that the Clar sextet formula with the maximum number of sextet rings cannot always be defined meaningfully for large irregular-shaped PAHs. It is true that edge structure is always a primary determinant of the PAH aromaticity pattern. In large PAH molecules, every edge structure modifies the aromaticity pattern near the edge, but its influence fades on going away from the edge. It follows that different textures of the aromaticity pattern appear near different edges. As a result, the entire aromaticity pattern does not always match with a single Clar formula or a single weighted superposed Clar formula. Such an unusual feature of aromaticity patterns could not have been observed distinctly if we had not explored the aromaticity patterns of large irregular-shaped PAH molecules systematically. We used the superaromatic stabilization energy (SSE) as a local aromaticity index, which is the only index of this kind not disturbed by the aromaticity of adjacent benzene rings.
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Affiliation(s)
- Naoko Nishina
- Department of Chemistry, Faculty of Science, Shizuoka University , Oya, Shizuoka 422-8529, Japan
| | - Masakazu Makino
- Department of Environmental and Life Sciences, School of Food and Nutritional Sciences, University of Shizuoka , Yada, Shizuoka 422-8526, Japan
| | - Jun-ichi Aihara
- Department of Chemistry, Faculty of Science, Shizuoka University , Oya, Shizuoka 422-8529, Japan.,Department of Environmental and Life Sciences, School of Food and Nutritional Sciences, University of Shizuoka , Yada, Shizuoka 422-8526, Japan
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13
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Otero N, El-kelany KE, Pouchan C, Rérat M, Karamanis P. Establishing the pivotal role of local aromaticity in the electronic properties of boron-nitride graphene lateral hybrids. Phys Chem Chem Phys 2016; 18:25315-25328. [PMID: 27711641 DOI: 10.1039/c6cp04502b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Within an attempt to unravel the conundrum of irregular bandgap variations in hybrids of white-graphene (hBN) and graphene (G) observed in both experiment and theory, strong proofs about the decisive role of aromaticity in their electronic properties are brought to light.
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Affiliation(s)
- Nicolás Otero
- Equipe de Chimie Théorique
- ECP Institut des Sciences Analytiques et de Physico-chimie pour l'Environnement et les Matériaux (IPREM) UMR 5254. Hélioparc Pau Pyrénées 2 avenue du Président Angot
- 64053 PAU Cedex 09
- France
- Departamento de Química Física
| | - Khaled E. El-kelany
- Equipe de Chimie Théorique
- ECP Institut des Sciences Analytiques et de Physico-chimie pour l'Environnement et les Matériaux (IPREM) UMR 5254. Hélioparc Pau Pyrénées 2 avenue du Président Angot
- 64053 PAU Cedex 09
- France
- CompChem Lab
| | - Claude Pouchan
- Equipe de Chimie Théorique
- ECP Institut des Sciences Analytiques et de Physico-chimie pour l'Environnement et les Matériaux (IPREM) UMR 5254. Hélioparc Pau Pyrénées 2 avenue du Président Angot
- 64053 PAU Cedex 09
- France
| | - Michel Rérat
- Equipe de Chimie Théorique
- ECP Institut des Sciences Analytiques et de Physico-chimie pour l'Environnement et les Matériaux (IPREM) UMR 5254. Hélioparc Pau Pyrénées 2 avenue du Président Angot
- 64053 PAU Cedex 09
- France
| | - Panaghiotis Karamanis
- Equipe de Chimie Théorique
- ECP Institut des Sciences Analytiques et de Physico-chimie pour l'Environnement et les Matériaux (IPREM) UMR 5254. Hélioparc Pau Pyrénées 2 avenue du Président Angot
- 64053 PAU Cedex 09
- France
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14
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Saha B, Bhattacharyya PK. Understanding reactivity, aromaticity and absorption spectra of carbon cluster mimic to graphene: a DFT study. RSC Adv 2016. [DOI: 10.1039/c6ra15016k] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Effect of doping B and/or N on the reactivity, aromaticity and absorption spectra of graphene and functionalized (–OH and –COOH) carbon cluster mimicking graphene is studied using DFT, DFRT and TD-DFT.
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Affiliation(s)
- Bapan Saha
- Department of Chemistry
- Arya Vidyapeeth College
- Guwahati-781016
- India
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15
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Woller T, Contreras-García J, Geerlings P, De Proft F, Alonso M. Understanding the molecular switching properties of octaphyrins. Phys Chem Chem Phys 2016; 18:11885-900. [DOI: 10.1039/c5cp07413d] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Triggering Hückel–Möbius topological and aromaticity switches in octaphyrins by protonation and redox reactions.
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Affiliation(s)
- T. Woller
- Eenheid Algemene Chemie (ALGC)
- Vrije Universiteit Brussel (VUB)
- 1050 Brussels
- Belgium
| | - J. Contreras-García
- Sorbonne Universités
- UPMC Univ Paris 06
- UMR 7616
- Laboratoire de Chimie Théorique
- Paris
| | - P. Geerlings
- Eenheid Algemene Chemie (ALGC)
- Vrije Universiteit Brussel (VUB)
- 1050 Brussels
- Belgium
| | - Frank De Proft
- Eenheid Algemene Chemie (ALGC)
- Vrije Universiteit Brussel (VUB)
- 1050 Brussels
- Belgium
| | - M. Alonso
- Eenheid Algemene Chemie (ALGC)
- Vrije Universiteit Brussel (VUB)
- 1050 Brussels
- Belgium
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16
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Yuan Y, Chen P, Yang L, Ju Y, Wang H. Quantum chemical insight into the reactivity of 1,3-dipoles on coronene as model for nanographenes. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2015. [DOI: 10.1134/s0036024416010337] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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17
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18
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Li X, Zhang TY, Su YJ. Periodically Modulated Size-Dependent Elastic Properties of Armchair Graphene Nanoribbons. NANO LETTERS 2015; 15:4883-4888. [PMID: 26134244 DOI: 10.1021/acs.nanolett.5b00399] [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
First-principles calculations were conducted on armchair graphene nanoribbons (AGNRs) to simulate the elastic behavior of AGNRs with hydrogen-terminated and bare edges. The results show width-dependent elastic properties with a periodicity of three, which depends on the nature of edge. The edge eigenstress and eigendisplacement models are able to predict the width-dependent nominal Young's modulus and Poisson's ratio, while the Clar structure explains the crucial role of edges in the periodically modulated size-dependent elastic properties.
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Affiliation(s)
- X Li
- †Corrosion and Protection Center, Key Laboratory for Environmental Fracture (MOE), University of Science and Technology Beijing, Beijing 100083, China
| | - Tong-Yi Zhang
- ‡Shanghai University Materials Genome Institute and Shanghai Materials Genome Institute, Shanghai University, 99 Shangda Road, Shanghai 200444, China
| | - Y J Su
- †Corrosion and Protection Center, Key Laboratory for Environmental Fracture (MOE), University of Science and Technology Beijing, Beijing 100083, China
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19
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Feixas F, Matito E, Poater J, Solà M. Quantifying aromaticity with electron delocalisation measures. Chem Soc Rev 2015; 44:6434-51. [PMID: 25858673 DOI: 10.1039/c5cs00066a] [Citation(s) in RCA: 286] [Impact Index Per Article: 31.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Aromaticity cannot be measured directly by any physical or chemical experiment because it is not a well-defined magnitude. Its quantification is done indirectly from the measure of different properties that are usually found in aromatic compounds such as bond length equalisation, energetic stabilisation, and particular magnetic behaviour associated with induced ring currents. These properties have been used to set up the myriad of structural-, energetic-, and magnetic-based indices of aromaticity known to date. The cyclic delocalisation of mobile electrons in two or three dimensions is probably one of the key aspects that characterise aromatic compounds. However, it has not been until the last decade that electron delocalisation measures have been widely employed to quantify aromaticity. Some of these new indicators of aromaticity such as the PDI, FLU, ING, and INB were defined in our group. In this paper, we review the different existing descriptors of aromaticity that are based on electron delocalisation properties, we compare their performance with indices based on other properties, and we summarise a number of applications of electronic-based indices for the analysis of aromaticity in interesting chemical problems.
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Affiliation(s)
- Ferran Feixas
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, 17071 Girona, Spain.
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20
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Ilyasov VV, Nguyen CV, Ershov IV, Hieu NN. Effect of electric field on the electronic and magnetic properties of a graphene nanoribbon/aluminium nitride bilayer system. RSC Adv 2015. [DOI: 10.1039/c5ra06239j] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The effect of an external electric field on the electronic and magnetic properties of the heterostructure of zigzag graphene nanoribbons (ZGNRs) placed on an aluminium nitride nanosheet (AlNNS) is studied using density functional theory (DFT).
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Affiliation(s)
- Victor V. Ilyasov
- Physics Department
- Don State Technical University
- Rostov on Don 344000
- Russia
| | - Chuong V. Nguyen
- Physics Department
- Don State Technical University
- Rostov on Don 344000
- Russia
| | - Igor V. Ershov
- Physics Department
- Don State Technical University
- Rostov on Don 344000
- Russia
| | - Nguyen N. Hieu
- Institute of Research and Development
- Duy Tan University
- Da Nang
- Vietnam
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21
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Zhang WX, He C, Li T, Gong SB. Tuning electronic and magnetic properties of zigzag graphene nanoribbons with a Stone–Wales line defect by position and axis tensile strain. RSC Adv 2015. [DOI: 10.1039/c5ra01612f] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The structural, electronic and magnetic properties can be modulated by changing the SW LD locations and axis tensile strain of 10-ZGNRs using density functional theory.
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Affiliation(s)
- W. X. Zhang
- School of Materials Science and Engineering
- Chang'an University
- Xi'an 710064
- China
| | - C. He
- State Key Laboratory for Mechanical Behavior of Materials
- School of Materials Science and Engineering
- Xi'an Jiaotong University
- Xi'an 710049
- China
| | - T. Li
- School of Materials Science and Engineering
- Chang'an University
- Xi'an 710064
- China
| | - S. B. Gong
- School of Materials Science and Engineering
- Chang'an University
- Xi'an 710064
- China
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22
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Ilyasov VV, Meshi BC, Nguyen VC, Ershov IV, Nguyen DC. Tuning the band structure, magnetic and transport properties of the zigzag graphene nanoribbons/hexagonal boron nitride heterostructures by transverse electric field. J Chem Phys 2014; 141:014708. [PMID: 25005304 DOI: 10.1063/1.4885857] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Affiliation(s)
- V V Ilyasov
- Department of Physics, Don State Technical University, 1 Gagarin Sq, 344000 Rostov on Don, Russia
| | - B C Meshi
- Department of Physics, Don State Technical University, 1 Gagarin Sq, 344000 Rostov on Don, Russia
| | - V C Nguyen
- Department of Physics, Don State Technical University, 1 Gagarin Sq, 344000 Rostov on Don, Russia
| | - I V Ershov
- Department of Physics, Don State Technical University, 1 Gagarin Sq, 344000 Rostov on Don, Russia
| | - D C Nguyen
- Department of Electronic Materials, School of Engineering Physics, Hanoi University of Science and Technology, 1 Dai Co Viet Rd, 10000 Hanoi, Vietnam
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Sakamoto K, Nishina N, Enoki T, Aihara JI. Aromatic Character of Nanographene Model Compounds. J Phys Chem A 2014; 118:3014-25. [DOI: 10.1021/jp5017032] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Kenkichi Sakamoto
- Department of Chemistry, Faculty
of Science, Shizuoka University, Oya, Shizuoka 422-8529, Japan
| | - Naoko Nishina
- Department of Chemistry, Faculty
of Science, Shizuoka University, Oya, Shizuoka 422-8529, Japan
| | - Toshiaki Enoki
- Department of Chemistry, Tokyo Institute of Technology, Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Jun-ichi Aihara
- Department of Chemistry, Faculty
of Science, Shizuoka University, Oya, Shizuoka 422-8529, Japan
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Pacheco Sanjuan AA, Mehboudi M, Harriss EO, Terrones H, Barraza-Lopez S. Quantitative chemistry and the discrete geometry of conformal atom-thin crystals. ACS NANO 2014; 8:1136-1146. [PMID: 24400916 DOI: 10.1021/nn406532z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
When flat or on a firm mechanical substrate, the atomic composition and atomistic structure of two-dimensional crystals dictate their chemical, electronic, optical, and mechanical properties. These properties change when the two-dimensional and ideal crystal structure evolves into arbitrary shapes, providing a direct and dramatic link among geometry and material properties due to the larger structural flexibility when compared to bulk three-dimensional materials. We describe methods to understand the local geometrical information of two-dimensional conformal crystals quantitatively and directly from atomic positions, even in the presence of atomistic defects. We then discuss direct relations among the discrete geometry and chemically relevant quantities--mean bond lengths, hybridization angles, and σ-π hybridization. These concepts are illustrated for carbon-based materials and ionic crystals. The pyramidalization angle turns out to be linearly proportional to the mean curvature for relevant crystalline configurations. Discrete geometry provides direct quantitative information on the potential chemistry of conformal two-dimensional crystals.
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Abstract
In 1972 Erich Clar formulated his aromatic π-sextet rule that allows discussing qualitatively the aromatic character of benzenoid species. Now, 40 years later, Clar's aromatic π-sextet rule is still a source of inspiration for many chemists. This simple rule has been validated both experimentally and theoretically. In this review, we select some particular examples to highlight the achievement of Clar's aromatic π-sextet rule in many situations and we discuss two recent successful cases of its application.
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Affiliation(s)
- Miquel Solà
- Institut de Química Computacional i Catàlisi and Departament de Química, Universitat de GironaGirona, Spain
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26
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Sánchez-Sanz G, Trujillo C, Rozas I, Elguero J. A theoretical study on the aromaticity of benzene and related derivatives incorporating a C–C C–C fragment. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.06.072] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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27
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Hu HW, Xin JH, Hu H. Highly Efficient Graphene-Based Ternary Composite Catalyst with Polydopamine Layer and Copper Nanoparticles. Chempluschem 2013; 78:1483-1490. [DOI: 10.1002/cplu.201300124] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Revised: 07/24/2013] [Indexed: 11/08/2022]
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Abstract
The edge of two dimensional (2D) graphene, as the surface of a three dimensional (3D) crystal, plays a crucial role in the determination of its physical, electronic and chemical properties and thus has been extensively studied recently. In this review, we summarize the recent advances in the study of graphene edges, including edge formation energy, edge reconstruction, method of graphene edge synthesis and the recent progress on metal-passivated graphene edges and the role of edges in graphene CVD growth. We expect this review to provide a guideline for readers to gain a clear picture of graphene edges from several aspects, especially the catalyst-passivated graphene edges and their role in graphene CVD growth.
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Affiliation(s)
- Xiuyun Zhang
- Institute of Textile and clothing, Hong Kong Polytechnic University, Hong Kong, China
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29
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Martin-Martinez FJ, Fias S, Van Lier G, De Proft F, Geerlings P. Tuning aromaticity patterns and electronic properties of armchair graphene nanoribbons with chemical edge functionalisation. Phys Chem Chem Phys 2013; 15:12637-47. [DOI: 10.1039/c3cp51293b] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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30
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Zubarev DY, Frenklach M, Lester Jr WA. From aromaticity to self-organized criticality in graphene. Phys Chem Chem Phys 2012; 14:12075-8. [DOI: 10.1039/c2cp41675a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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