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Sensing Nitrogen Mustard Gas Simulant at the ppb Scale via Selective Dual-Site Activation at Au/Mn 3 O 4 Interfaces.

Sensing Nitrogen Mustard Gas Simulant at the ppb Scale via Selective Dual-Site Activation at Au/Mn 3 O 4 Interfaces.

Authors :
Bigiani L
Zappa D
Barreca D
Gasparotto A
Sada C
Tabacchi G
Fois E
Comini E
Maccato C
Source :
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2019 Jul 03; Vol. 11 (26), pp. 23692-23700. Date of Electronic Publication: 2019 Jun 21.
Publication Year :
2019

Abstract

The efficient detection of chemical warfare agents (CWAs), putting at stake human life and global safety, is of paramount importance in the development of reliable sensing devices for safety applications. Herein, we present the fabrication of Mn <subscript>3</subscript> O <subscript>4</subscript> -based nanocomposites containing noble metal particles for the gas-phase detection of a simulant of vesicant nitrogen mustard, i.e., di(propylene glycol) monomethyl ether (DPGME). The target materials were fabricated by chemical vapor deposition of manganese oxide on Al <subscript>2</subscript> O <subscript>3</subscript> substrates and subsequent functionalization with silver or gold via radio frequency sputtering. The obtained high purity composites, characterized by an intimate metal/oxide contact, yielded an outstanding efficiency in the detection of DPGME. In particular, sensing of the latter analyte with an ultralow detection limit of 0.6 ppb could be performed selectively with respect to other CWA simulants. In addition, the tuneability of selectivity patterns as a function of metal nanoparticle nature paves the way to the development of efficient and selective devices for practical end uses.

Details

Language :
English
ISSN :
1944-8252
Volume :
11
Issue :
26
Database :
MEDLINE
Journal :
ACS applied materials & interfaces
Publication Type :
Academic Journal
Accession number :
31252461
Full Text :
https://doi.org/10.1021/acsami.9b04875