Insight the process of hydrazine gas adsorption on layered WS2: a first principle study
- Univ. of Louisville, KY (United States); Ming Yu, Associate Professor, University of Louisville
- Univ. of Louisville, KY (United States)
The process of hydrazine gas adsorption on layered WS2 has been systematically studied from first principle calculations. Our results demonstrate that this adsorption process is exothermic, and hydrazine molecules are physically adsorbed. The layer-dependent adsorption energy and interlayer separation induced by van der Waals interaction exerted by hydrazine molecules lead to the difficulty in desorbing hydrazine molecules from layered WS2 as the number of layers increases. The most interesting finding is the emergence of localized impurity states below the Fermi level upon the hydrazine adsorption, irrespective of the number of WS2 layers, resulting in a significant effect on the band structures and subsequently changing its electrical conductivity. Furthermore, a layer-dependent small charge transfer occurs between hydrazine and layered WS2, leading to a charge redistribution and considerable polarization in the adsorbed systems. The existence of defects and the humidity, on the other hand, influences the sensitivity of layered WS2 to the hydrazine adsorption. Here, obtained results show that a perfectly layered WS2 might be a promising candidate as an efficient nanosensor to detect such toxic gas in dry environment.
- Research Organization:
- Univ. of Louisville, KY (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- Grant/Contract Number:
- SC0019348
- OSTI ID:
- 1774537
- Alternate ID(s):
- OSTI ID: 23104690
- Journal Information:
- Nanotechnology, Journal Name: Nanotechnology Journal Issue: 49 Vol. 31; ISSN 0957-4484
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Similar Records
Mechanism of charge transfer and its impacts on Fermi-level pinning for gas molecules adsorbed on monolayer WS{sub 2}
Photocarrier generation from interlayer charge-transfer transitions in WS2-graphene heterostructures
Interlayer Interactions in Twisted WSe2/WS2 Bilayer Heterojunctions: Synthesis, Characterization, and Modeling
Journal Article
·
Sun Jun 07 00:00:00 EDT 2015
· Journal of Chemical Physics
·
OSTI ID:22415948
Photocarrier generation from interlayer charge-transfer transitions in WS2-graphene heterostructures
Journal Article
·
Thu Feb 01 19:00:00 EST 2018
· Science Advances
·
OSTI ID:1499923
Interlayer Interactions in Twisted WSe2/WS2 Bilayer Heterojunctions: Synthesis, Characterization, and Modeling
Journal Article
·
Wed Jun 15 20:00:00 EDT 2016
· ACS Nano
·
OSTI ID:1324084