Modulation of Gas Adsorption on SnS by strain

Fafei Hu, Huaiyu Ye, Hongyu Tang, Xianping Chen

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

1 Citation (Scopus)

Abstract

SnS monolayer has sparked intensive attention due to its unique electronic and optical properties. We systemically investigate the electronic properties of SnS by first-principles calculation. Our results show that the monolayer possesses indirect bandgap. We further perform mechanical strain to adjust the electronic structure of SnS, corresponding results display an indirect-direct transition of band gap when subjected to proper external strain. Interestingly, the bandgap can be linearly increase under tensile strain from 0% to 7%, while the bandgap reduced under compressive strain. For biaxial strain, the band gap changes more remarkable compared with that under uniaxial strain (zigzag x or armchair y direction). Furthermore, we demonstrate that the gas molecules (CO2, H2S, C2H4 and NO2) adsorption property on SnS monolayer can be modulated through biaxial strain. Especially, the NO2 adsorption is further enhanced on the SnS monolayer under biaxial tensile strain. These results may provide guidance for fabricating SnS-based strained gas sensor.

Original languageEnglish
Title of host publicationProceedings - 2018 19th International Conference on Electronic Packaging Technology, ICEPT 2018
EditorsF. Xiao, J. Wang, L. Chen, T. Ye
Place of PublicationPiscataway, NJ
PublisherIEEE
Pages941-943
Number of pages3
ISBN (Electronic)978-1-5386-6386-8
ISBN (Print)978-1-5386-6387-5
DOIs
Publication statusPublished - 2 Oct 2018
EventICEPT 2018: 19th International Conference on Electronic Packaging Technology - Shanghai, China
Duration: 8 Aug 201811 Aug 2018
Conference number: 19

Conference

ConferenceICEPT 2018
CountryChina
CityShanghai
Period8/08/1811/08/18

Keywords

  • first-principle
  • gas sensors
  • SnS
  • strain

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