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1. (WO2018081129) PLATINUM AND TIN OXIDE CO-FUNCTIONALIZED SINGLED WALLED CARBON NANOTUBES (Pt/SnO2/SWNTs) AND THEIR SENSING PROPERTIES TOWARDS CARBON MONOXIDE AT ROOM TEMPERATURE

Pub. No.:    WO/2018/081129    International Application No.:    PCT/US2017/058098
Publication Date: Fri May 04 01:59:59 CEST 2018 International Filing Date: Wed Oct 25 01:59:59 CEST 2017
IPC: G01N 27/407
G01N 27/04
G01N 27/07
G01N 27/12
B82Y 15/00
Applicants: THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
Inventors: MYUNG, Nosang V.
SU, Heng C.
Title: PLATINUM AND TIN OXIDE CO-FUNCTIONALIZED SINGLED WALLED CARBON NANOTUBES (Pt/SnO2/SWNTs) AND THEIR SENSING PROPERTIES TOWARDS CARBON MONOXIDE AT ROOM TEMPERATURE
Abstract:
A method and system are disclosed of Pt and SnO2 co-functionalized on single-walled carbon nanotubes (SWNTs) assembled on microelectrodes by electrochemical deposition where Pt nanoparticle's morphology, size, and density were tuned by controlling electrodeposition potential and time. The method and system to obtain the optimum condition for Pt decorated SnO2/SWNTs (Pt/SnO2/SWNTs) were performed and also correlate with its CO sensing performance. Light dependent sensing performance was examined with red, green and UV LED light under room temperature. With the assistance of the UV LED light illumination, the sensitivity of Pt/SnO2/SWNTs was further enhanced to 2.1%/ppmv to 50 ppmv of CO and the detection limit can push down to 0.05 ppmv.