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Shi X, Gao W, Liu H, Fu ZG, Zhang G, Zhang YW, Liu T, Zhao J, Gao J. Sumanene Monolayer of Pure Carbon: A Two-Dimensional Kagome-Analogy Lattice with Desirable Band Gap, Ultrahigh Carrier Mobility, and Strong Exciton Binding Energy. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2203274. [PMID: 36050882 DOI: 10.1002/smll.202203274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 08/11/2022] [Indexed: 06/15/2023]
Abstract
The design and synthesis of novel two-dimensional (2D) materials that possess robust structural stability and unusual physical properties may open up enormous opportunities for device and engineering applications. Herein, a 2D sumanene lattice that can be regarded as a derivative of the conventional Kagome lattice is proposed. The tight-binding analysis demonstrates sumanene lattice contains two sets of Dirac cones and two sets of flat bands near the Fermi surface, distinctively different from the Kagome lattice. Using first-principles calculations, two possible routines for the realization of stable 2D sumanene monolayers (named α phase and β phase) are theoretically suggested, and an α-sumanene monolayer can be experimentally synthesized with chemical vapor deposition using C21 H12 as a precursor. Small binding energies on Au(111) surface (e.g., -37.86 eV Å-2 for α phase) signify the possibility of their peel-off after growing on the noble metal substrate. Importantly, the GW plus Bethe-Salpeter equation calculations demonstrate both monolayers have moderate band gaps (1.94 eV for α) and ultrahigh carrier mobilities (3.4 × 104 cm2 V-1 s-1 for α). In particular, the α-sumanene monolayer possesses a strong exciton binding energy of 0.73 eV, suggesting potential applications in optics.
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Affiliation(s)
- Xiaoran Shi
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, Dalian, 116024, P. R. China
| | - Weiwei Gao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, Dalian, 116024, P. R. China
| | - Hongsheng Liu
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, Dalian, 116024, P. R. China
| | - Zhen-Guo Fu
- Institute of Applied Physics and Computational Mathematics, Beijing, 100088, P. R. China
| | - Gang Zhang
- Institute of High Performance Computing, A*STAR, Singapore, 138632, Singapore
| | - Yong-Wei Zhang
- Institute of High Performance Computing, A*STAR, Singapore, 138632, Singapore
| | - Tao Liu
- State Key Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, P. R. China
| | - Jijun Zhao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, Dalian, 116024, P. R. China
| | - Junfeng Gao
- Key Laboratory of Materials Modification by Laser, Ion and Electron Beams, Dalian University of Technology, Ministry of Education, Dalian, 116024, P. R. China
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Sharma N, Dhankhar SS, Kumar S, Kumar TJD, Nagaraja CM. Rational Design of a 3D MnII-Metal-Organic Framework Based on a Nonmetallated Porphyrin Linker for Selective Capture of CO2and One-Pot Synthesis of Styrene Carbonates. Chemistry 2018; 24:16662-16669. [DOI: 10.1002/chem.201803842] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2018] [Indexed: 12/12/2022]
Affiliation(s)
- Nayuesh Sharma
- Department of Chemistry; Indian Institute of Technology Ropar; Rupnagar, Punjab 140001 India
| | - Sandeep Singh Dhankhar
- Department of Chemistry; Indian Institute of Technology Ropar; Rupnagar, Punjab 140001 India
| | - Sandeep Kumar
- Department of Chemistry; Indian Institute of Technology Ropar; Rupnagar, Punjab 140001 India
| | - T. J. Dhilip Kumar
- Department of Chemistry; Indian Institute of Technology Ropar; Rupnagar, Punjab 140001 India
| | - C. Mallaiah Nagaraja
- Department of Chemistry; Indian Institute of Technology Ropar; Rupnagar, Punjab 140001 India
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Artaud A, Magaud L, Ratter K, Gilles B, Guisset V, David P, Martinez JI, Martin-Gago JA, Chapelier C, Coraux J. Size-Selective Carbon Clusters as Obstacles to Graphene Growth on a Metal. NANO LETTERS 2018; 18:4812-4820. [PMID: 29975539 DOI: 10.1021/acs.nanolett.8b01379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Chemical vapor deposition (CVD) on metals is so far the best suited method to produce high-quality, large-area graphene. We discovered an unprecedentedly large family of small size-selective carbon clusters that form together with graphene during CVD. Using scanning tunneling microscopy (STM) and density functional theory (DFT), we unambiguously determine their atomic structure. For that purpose, we use grids based on a graphene moiré and a dilute atomic lattice that unambiguously reveal the binding geometry of the clusters. We find that the observed clusters bind in metastable configurations on the substrate, while the thermodynamically stable configurations are not observed. We argue that the clusters are formed under kinetic control and establish that the evolution of the smallest clusters is blocked. They are hence products of surface reactions in competition with graphene growth, rather than intermediary species to the formation of extended graphene, as often assumed in the literature. We expect such obstacles to the synthesis of perfect graphene to be ubiquitous on a variety of metallic surfaces.
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Affiliation(s)
- Alexandre Artaud
- Univ. Grenoble Alpes, CEA, INAC, PHELIQS , 38000 Grenoble , France
- Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut NEEL , 38000 Grenoble , France
| | - Laurence Magaud
- Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut NEEL , 38000 Grenoble , France
| | - Kitti Ratter
- Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut NEEL , 38000 Grenoble , France
- Univ. Grenoble Alpes, CNRS, Grenoble INP, SIMAP , 38000 Grenoble , France
| | - Bruno Gilles
- Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut NEEL , 38000 Grenoble , France
- Univ. Grenoble Alpes, CNRS, Grenoble INP, SIMAP , 38000 Grenoble , France
| | - Valérie Guisset
- Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut NEEL , 38000 Grenoble , France
| | - Philippe David
- Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut NEEL , 38000 Grenoble , France
| | - Jose Ignacio Martinez
- Materials Science Factory , Instituto de Ciencia de Materiales de Madrid-CSIC , C/Sor Juana Inés de la Cruz 3 , Madrid 28049 , Spain
| | - Jose Angel Martin-Gago
- Materials Science Factory , Instituto de Ciencia de Materiales de Madrid-CSIC , C/Sor Juana Inés de la Cruz 3 , Madrid 28049 , Spain
| | - Claude Chapelier
- Univ. Grenoble Alpes, CEA, INAC, PHELIQS , 38000 Grenoble , France
| | - Johann Coraux
- Univ. Grenoble Alpes, CNRS, Grenoble INP, Institut NEEL , 38000 Grenoble , France
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Du C, Hu X, Cheng Y, Gao J, Zhang YW, Su K, Li Z, Zhang N, Chang N, Zeng K. Synergetically understanding the interaction between nano/microspheres and peptide for controllable drug loading via experimental and theoretical approaches. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2018; 83:169-176. [DOI: 10.1016/j.msec.2017.10.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2017] [Revised: 10/02/2017] [Accepted: 10/04/2017] [Indexed: 12/28/2022]
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