UV Enhanced NO2 Sensing Properties of Pt Functionalized Ga2O3 Nanorods

Title
UV Enhanced NO2 Sensing Properties of Pt Functionalized Ga2O3 Nanorods
Authors
이종무
Keywords
Ga2O3, Nanorod, Gas sensor, UV, Functionalization
Issue Date
2013
Publisher
BULLETIN OF THE KOREAN CHEMICAL SOCIETY
Series/Report no.
BULLETIN OF THE KOREAN CHEMICAL SOCIETY; vol.34 no.6 startpage 1632 endpage 1636
Abstract
Ga2O3 one-dimensional (1D) nanostructures were synthesized by using a thermal evaporation technique. The morphology, crystal structure, and sensing properties of the Ga2O3 nanostructures functionalized with Pt to NO2 gas at room temperature under UV irradiation were examined. The diameters of the 1D nanostructures ranged from a few tens to a few hundreds of nanometers and the lengths ranged up to a few hundreds of micrometers. Pt nanoparticles with diameters of a few tens of nanometers were distributed around a Ga2O3 nanorod. The responses of the nanorods gas sensors fabricated from multiple networked Ga2O3 nanorods were improved 3-4 fold at NO2 concentrations ranging from 1 to 5 ppm by Pt functionalization. The Pt-functionalized Ga2O3 nanorod gas sensors showed a remarkably enhanced response at room temperature under ultraviolet (UV) light illumination. In addition, the mechanisms via which the gas sensing properties of Ga2O3 nanorods are enhanced by Pt functionalization and UV irradiation are discussed.
URI
http://dx.doi.org/10.5012/bkcs.2013.34.6.1632
http://dspace.inha.ac.kr/handle/10505/32792
ISSN
0253-2964
Appears in Collections:
College of Engineering(공과대학) > Materials Science & Engineering (신소재공학) > Local Access Journal, Reports (신소재공학 논문, 보고서)

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