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Title: Synergistic Integration of Chemo-Resistive and SERS Sensing for Label-Free Multiplex Gas Detection

Journal Article · · Advanced Materials
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [4]; ORCiD logo [5]; ORCiD logo [2]
  1. Korea Advanced Institute Science and Technology (KAIST), Daejeon (Korea, Republic of); Yale University, New Haven, CT (United States); Energy Sciences Institute, West Haven, CT (United States); OSTI
  2. Korea Advanced Institute Science and Technology (KAIST), Daejeon (Korea, Republic of)
  3. Korea Research Institute of Chemical Technology, Daejeon (Korea, Republic of); Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)
  4. Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)
  5. Yale University, New Haven, CT (United States); Energy Sciences Institute, West Haven, CT (United States)

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. In this report 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 SnO2 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.

Research Organization:
Massachusetts Institute of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Research Foundation of Korea (NRF)
Grant/Contract Number:
SC0002633
OSTI ID:
1976196
Journal Information:
Advanced Materials, Journal Name: Advanced Materials Journal Issue: 44 Vol. 33; ISSN 0935-9648
Publisher:
WileyCopyright Statement
Country of Publication:
United States
Language:
English

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