UV-Enhanced NO2 Gas Sensing Properties of SnO2-Core/ZnO-Shell Nanowires at Room Temperature

Title
UV-Enhanced NO2 Gas Sensing Properties of SnO2-Core/ZnO-Shell Nanowires at Room Temperature
Authors
이종무
Keywords
SnO2, ZnO, core/shell nanowires, gas sensor, UV irradiation
Issue Date
2013
Publisher
ACS APPLIED MATERIALS & INTERFACES
Series/Report no.
ACS APPLIED MATERIALS & INTERFACES; vol.5 startpage 4285 endpage 4292
Abstract
SnO2-core/ZnO-shell nanowires were synthesized using a two-step process: the synthesis of SnO2 nanowires by the thermal evaporation of Sn powders followed by the atomic layer deposition of ZnO. The room temperature NO2 gas sensing properties of the nanowires under ultraviolet (UV) illumination were examined. The cores and shells of the nanowires were primitive tetragonalstructured single crystal SnO2 and wurtzite-structured single crystal ZnO, respectively. The responses of multiple networked SnO2 nanowire sensors were increased 2?3-fold at NO2 concentrations ranging from 1 to 5 ppm by encapsulating the nanowires with ZnO. The SnO2-core/ZnO-shell nanowire sensors showed a remarkably enhanced response under UV illumination. The sensing mechanism of the core/shell nanowires under UV illumination is also discussed.
URI
dx.doi.org/10.1021/am400500a
http://dspace.inha.ac.kr/handle/10505/32789
ISSN
1944-8244
Appears in Collections:
College of Engineering(공과대학) > Materials Science & Engineering (신소재공학) > Local Access Journal, Reports (신소재공학 논문, 보고서)

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse