Stability of rolled-up GaAs nanotubes.

Abstract:

:This work presents a theoretical study of gallium arsenide (GaAs) nanotubes obtained from the (100), (110) and (111) crystal planes of zincblende structure in order to evaluate the electronic properties. The DFT/B3LYP/6-31G method was used to predict structures and stabilities. It was found that nanotubes from the (110) crystal plane tended to be the most stable. The results for average diameter and bond length obtained for optimized nanotube geometries show that nanotubes constructed from the (100) plane have a hyperbolic format, while (110) or (111) nanotubes have a conical format. This difference in relation to geometry introduces regions with different charge concentrations along the tube. From the calculated values for the gap it follows that increasing the number of atoms per layer causes a displacement of the frontier orbitals with a reduction in the gap, yielding characteristics of a semiconductor material.

journal_name

J Mol Model

authors

Silva JCF,Dos Santos JD,Taft CA,Martins JBL,Longo E

doi

10.1007/s00894-017-3371-3

subject

Has Abstract

pub_date

2017-07-01 00:00:00

pages

204

issue

7

eissn

1610-2940

issn

0948-5023

pii

10.1007/s00894-017-3371-3

journal_volume

23

pub_type

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