The effect of platinum precursor concentrations on chlorine sensing characteristics of platinum nanoparticles?loaded single walled carbon nanotubes

Title
The effect of platinum precursor concentrations on chlorine sensing characteristics of platinum nanoparticles?loaded single walled carbon nanotubes
Authors
변영태최선우
Keywords
Single-walled carbon nanotubes; Platinum nanoparticles; Geometric configuration; Cl2 sensors; Sensing mechanism
Issue Date
2018-03
Publisher
Applied surface science
Citation
VOL 433-486
Abstract
The correlation between platinum (Pt) functionalization and chlorine (Cl2) sensing capability in single-walled carbon nanotubes (SWCNTs) was investigated. Utilizing a photoreduction technique via ultraviolet (UV) irradiation, the Pt nanoparticles (NPs) with various diameters of 7– 80 nm, which were controlled by Pt precursor concentrations, were successfully functionalized on the sidewalls of SWCNTs. The discrete Pt NP− loaded SWCNTs exhibited significantly enhanced response value (− (ΔR/R0) × 100 = 33.8%) for 1 ppm Cl2 at room temperature (25 °C) compared with that (no response) of pure SWCNTs. On the other hand, in case of continuous Pt NP– loaded SWCNTs, Cl2 sensing capabilities were significantly degraded. The Cl2 sensing capabilities of fabricated sensors tended to correlate with geometric configurations of the catalytic Pt NPs on the sidewalls of SWCNTs, due to differences in the electron pathway.
URI
http://pubs.kist.re.kr/handle/201004/67653
ISSN
0169-4332
Appears in Collections:
KIST Publication > Article
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