Demonstration of a Sensitive and Stable Chemical Gas Sensor Based on Covalently Functionalized MoS₂

Evans, Jake M. and Lee, Kyra S. and Yan, Ellen X. and Thompson, Annelise C. and Morla, Maureen B. and Meier, Madeline C. and Ifkovits, Zachary P. and Carim, Azhar I. and Lewis, Nathan S. (2022) Demonstration of a Sensitive and Stable Chemical Gas Sensor Based on Covalently Functionalized MoS₂. ACS Materials Letters, 4 (8). pp. 1475-1480. ISSN 2639-4979. doi:10.1021/acsmaterialslett.2c00372. https://resolver.caltech.edu/CaltechAUTHORS:20220714-369435000

PDF - Supplemental Material
See Usage Policy.
2MB

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20220714-369435000

Abstract

Chemically exfoliated MoS₂ was covalently functionalized and characterized as a chemically sensitive vapor sensor using changes in dc electrical resistance to detect a variety of volatile organic compounds (VOCs). Regardless of the polarity of the functionality introduced to the surface, sensors derived from functionalized MoS₂ showed high sensitivity for polar and nonpolar VOCs. Additionally, MoS₂ functionalized with trifluoromethyl benzyl bromide exhibited a very high sensitivity to polar and nonpolar organic vapors relative to the electrical resistance response of 2H MoS₂, 1T′ MoS₂, or carbon black/polymer composite chemiresistive vapor sensors. Chemically functionalized MoS₂ sensors retained >70% of their initial responsiveness to test analytes after at least 72 h in air.

Item Type:

Article

Related URLs:

URL	URL Type	Description
https://doi.org/10.1021/acsmaterialslett.2c00372	DOI	Article

ORCID:

Author	ORCID
Evans, Jake M.	0000-0002-8721-5316
Yan, Ellen X.	0000-0003-3252-790X
Thompson, Annelise C.	0000-0003-2414-7050
Morla, Maureen B.	0000-0002-2520-9543
Meier, Madeline C.	0000-0003-1608-0810
Ifkovits, Zachary P.	0000-0003-2538-0794
Carim, Azhar I.	0000-0003-3630-6872
Lewis, Nathan S.	0000-0001-5245-0538

Additional Information:

© 2022 American Chemical Society. Received: April 26, 2022; Accepted: June 21, 2022; Published: July 13, 2022. This work was supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences under award no. DE-FG02-03-ER15483. XPS data and vapor sensor measurements were obtained using the facilities and support of the Molecular Materials Resource Center of the Beckman Institute of the California Institute of Technology. M.C.M. acknowledges Graduate Research Fellowship from the National Science Foundation. M.C.M. also acknowledges the Resnick Sustainability Institute at Caltech for fellowship support. Author Contributions: J.M.E., K.S.L., and E.X.Y. contributed equally to this work. The authors declare no competing financial interest.

Group:

Resnick Sustainability Institute

Funders:

Funding Agency	Grant Number
Department of Energy (DOE)	DE-FG02-03-ER15483
NSF Graduate Research Fellowship	UNSPECIFIED
Resnick Sustainability Institute	UNSPECIFIED

Subject Keywords:

Electron density, Functional groups, Functionalization, Sensors, Volatile organic compounds

Issue or Number:

DOI:

10.1021/acsmaterialslett.2c00372

Record Number:

CaltechAUTHORS:20220714-369435000

Persistent URL:

https://resolver.caltech.edu/CaltechAUTHORS:20220714-369435000

Official Citation:

Demonstration of a Sensitive and Stable Chemical Gas Sensor Based on Covalently Functionalized MoS2. Jake M. Evans, Kyra S. Lee, Ellen X. Yan, Annelise C. Thompson, Maureen B. Morla, Madeline C. Meier, Zachary P. Ifkovits, Azhar I. Carim, and Nathan S. Lewis. ACS Materials Letters 2022 4 (8), 1475-1480; DOI: 10.1021/acsmaterialslett.2c00372

Usage Policy:

No commercial reproduction, distribution, display or performance rights in this work are provided.

ID Code:

115555

Collection:

CaltechAUTHORS

Deposited By:

George Porter

Deposited On:

14 Jul 2022 23:13

Last Modified:

15 Aug 2022 22:18

Repository Staff Only: item control page