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Synergistic Integration of Chemo-Resistive and SERS Sensing for Label-Free Multiplex Gas Detection.
- Source :
-
Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2021 Nov; Vol. 33 (44), pp. e2105199. Date of Electronic Publication: 2021 Sep 27. - Publication Year :
- 2021
-
Abstract
- Practical sensing applications such as real-time safety alerts and clinical diagnoses require sensor devices to differentiate between various target molecules with high sensitivity and selectivity, yet conventional devices such as oxide-based chemo-resistive sensors and metal-based surface-enhanced Raman spectroscopy (SERS) sensors usually do not satisfy such requirements. Here, a label-free, chemo-resistive/SERS multimodal sensor based on a systematically assembled 3D cross-point multifunctional nanoarchitecture (3D-CMA), which has unusually strong enhancements in both "chemo-resistive" and "SERS" sensing characteristics is introduced. 3D-CMA combines several sensing mechanisms and sensing elements via 3D integration of semiconducting SnO <subscript>2</subscript> nanowire frameworks and dual-functioning Au metallic nanoparticles. It is shown that the multimodal sensor can successfully estimate mixed-gas compositions selectively and quantitatively at the sub-100 ppm level, even for mixtures of gaseous aromatic compounds (nitrobenzene and toluene) with very similar molecular structures. This is enabled by combined chemo-resistive and SERS multimodal sensing providing complementary information.<br /> (© 2021 Wiley-VCH GmbH.)
Details
- Language :
- English
- ISSN :
- 1521-4095
- Volume :
- 33
- Issue :
- 44
- Database :
- MEDLINE
- Journal :
- Advanced materials (Deerfield Beach, Fla.)
- Publication Type :
- Academic Journal
- Accession number :
- 34569647
- Full Text :
- https://doi.org/10.1002/adma.202105199