Synthesis, structure, and UV-enhanced gas sensing properties of Au-functionalized ZnS nanowires

Title
Synthesis, structure, and UV-enhanced gas sensing properties of Au-functionalized ZnS nanowires
Authors
이상민
Keywords
ZnS nanowire Gas sensor NO2 Au functionalization UV
Issue Date
2013
Publisher
SENSORS AND ACTUATORS B-CHEMICAL
Series/Report no.
SENSORS AND ACTUATORS B-CHEMICAL ; Vol188 Startpage 1270 Endpage 1276
Abstract
Au-functionalized ZnS nanowires were prepared for use as gas sensors. Scanning electron microscopy revealed the diameters and lengths of the nanowires ranging from 20 to 100 nm and from a few tens to a few hundreds of micrometers, respectively. X-ray diffraction and transmission electron microscopy revealed that ZnS nanowires and Au nanoparticles were monocrystalline and polycrystalline, respectively. The responses of multiple networked ZnS nanowire sensors to 1?5 ppm NO2 were increased 1.6- to 1.9-fold and 2.8- to 5.4-fold byAufunctionalizationand a combinationofAufunctionalizationand UVirradiation, respectively.Au-functionalized ZnS nanowire sensors showed responses of 168?313%to 1?5 ppm NO2 at 300 ?C in the dark. These values are comparable or superior to most semiconductor oxide onedimensional nanostructures-based sensors reported in the literature. Furthermore, Au-functionalized ZnS nanowire sensors showed far higher responses (291?884%) to 1?5 ppm NO2 at 300 ?C under UV illumination. The NO2 gas sensing mechanism of the Au-functionalized ZnS nanowire sensors under UV illumination is discussed.
URI
http://dx.doi.org/10.1016/j.snb.2013.07.076
http://dspace.inha.ac.kr/handle/10505/33427
ISSN
0925-4005
Appears in Collections:
College of Engineering(공과대학) > Electronic Engineering (전자공학) > Journal Papers, Reports(전자공학 논문, 보고서)
Files in This Item:
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