« Previous AbstractThe Multifunctional Roles of Polyphenols in Plant-Herbivore Interactions    Next AbstractDevelopment of rapid and non-destructive electric nose (E-nose) system for shelf life evaluation of different edible seeds »

ACS Appl Mater Interfaces

Title:		Highly Selective Ethyl Mercaptan Sensing Using a MoSe(2)/SnO(2) Composite at Room Temperature
Author(s):		Singh S; Deb J; Singh JV; Sarkar U; Sharma S;
Address:		"Department of Physics, Guru Nanak Dev University, Amritsar, Punjab 143005, India. Department of Physics, Assam University, Silchar 788011, India. Department of Pharmaceutical Sciences, Guru Nanak Dev University, Amritsar, Punjab 143005, India"
Journal Title:		ACS Appl Mater Interfaces
Year:		2022
Volume:		20220513
Issue:
Page Number:		-
DOI:		10.1021/acsami.1c25112
ISSN/ISBN:		1944-8252 (Electronic) 1944-8244 (Linking)
Abstract:		"Volatile organic sulfur compounds (VOSCs) serve not only as biomarkers for dental diseases such as halitosis but also as a tracer for monitoring air quality. Room-temperature selective detection and superior sensitivity against VOSCs at a sub-ppm level has remained a challenging task. Here, we propose a heterostructure-based design using a MoSe(2)/SnO(2) composite for achieving sensitive and selective detection of ethyl mercaptan at room temperature. The composite was synthesized via a facile two-step method. A composite-based device has shown detection down to 1 ppm of ethyl mercaptan over a wider range of relative humidity (40-90%). Notably, the composite has shown adsorption selectivity toward ethyl mercaptan compared to hydrogen sulfide and other reducing or oxidizing analytes. Moreover, a density functional theory (DFT) study has been performed to understand the adsorption selectivity, charge transfer, and modification in the electronic properties after molecule adsorption on the host surface. Simulations predicted the lowest negative adsorption energy for ethyl mercaptan, implying the chemisorption (-142.029 kJ mol(-1)) process of adsorption. The device thus-obtained has also shown a stable response even at an extreme relative humidity level of 90%. The obtained results and superior signal-to-noise ratio indicate that a MoSe(2)/SnO(2)-based sensor may be a promising candidate for highly selective and sensitive detection of ethyl mercaptan even below 1 ppm"
Keywords:		MoSe2/SnO2 composite ethyl mercaptan (EM) sensor heterostructures relative humidity (RH) selectivity;
Notes:		"PublisherSingh, Sukhwinder Deb, Jyotirmoy Singh, Jatinder Vir Sarkar, Utpal Sharma, Sandeep eng 2022/05/14 ACS Appl Mater Interfaces. 2022 May 13. doi: 10.1021/acsami.1c25112"