Optical properties of two-dimensional zigzag and armchair graphyne nanoribbon semiconductor

被引：15
作者：
Asadpour, Mohamad [1 ]
Jafari, Mahmoud [1 ]
Asadpour, Milad [2 ]
Jafari, Maryam [3 ]
机构：
[1] KN Toosi Univ Technol, Dept Phys, Tehran, Iran
[2] Sardarjangal Higher Educ Inst, Rasht, Iran
[3] KN Toosi Univ Technol, Dept Ind Engn, Tehran, Iran
来源：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY | 2015年 / 139卷
关键词：
Graphyne nanoribbon; Optical band gap; Electron energy loss spectroscopy; Dielectric constant; Static refractive index; CARBON; GRAPHENE;
D O I：
10.1016/j.saa.2014.12.020
中图分类号：
O433 [光谱学];
学科分类号：
0703 ; 070302 ;
摘要：
Optical properties of zigzag and armchair graphyne nanoribbon (GNR) sheet were investigated. Effect of increasing the width of nanoribbon on optical properties and optical band gap in particular was also studied. Calculations were based on density functional theory (DFT) and the results showed that these structures were semiconductors with the optical band gap of about 1-3.5 eV; this value was higher than for the armchair than zigzag structures. With increasing the width of the ribbons, optical band gap decreased in both structures and maximum electron energy loss spectroscopy (EELS) and dielectric constant increased for the zigzag and armchair structures. Moreover, for the armchair structure, maximum optical reflectivity versus GNR width was a linear function, while it showed a teeth behavior for the zigzag structure. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：380 / 384
页数：5
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