Choi, Sun-Woo Byun, Young Tae 2024-01-19T23:04:26Z 2024-01-19T23:04:26Z 2021-09-03 2018-03-01 0169-4332 https://pubs.kist.re.kr/handle/201004/121622 The correlation between platinum (Pt) functionalization and chlorine (Cl-2) 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 (-(Delta R/R-0) x 100 = 33.8%) for 1 ppm Cl-2 at room temperature (25 degrees C) compared with that (no response) of pure SWCNTs. On the other hand, in case of continuous Pt NP-loaded SWCNTs, Cl-2 sensing capabilities were significantly degraded. The Cl-2 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. (C) 2017 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV IMPRINTED ELECTROCHEMICAL SENSOR GRAPHENE OXIDE NANOMATERIAL GOLD NANOPARTICLES SELECTIVE DETERMINATION VOLTAMMETRIC SENSOR GAS SENSORS MECHANISM NANOWIRES NITROGEN TYROSINE The effect of platinum precursor concentrations on chlorine sensing characteristics of platinum nanoparticles-loaded single walled carbon nanotubes Article 10.1016/j.apsusc.2017.09.245 1 APPLIED SURFACE SCIENCE, v.433, pp.480 - 486 APPLIED SURFACE SCIENCE 433 480 486 scie scopus 000418883800062 2-s2.0-85031713835 Chemistry, Physical Materials Science, Coatings & Films Physics, Applied Physics, Condensed Matter Chemistry Materials Science Physics Article IMPRINTED ELECTROCHEMICAL SENSOR GRAPHENE OXIDE NANOMATERIAL GOLD NANOPARTICLES SELECTIVE DETERMINATION VOLTAMMETRIC SENSOR GAS SENSORS MECHANISM NANOWIRES NITROGEN TYROSINE Single-walled carbon nanotubes Platinum nanoparticles Geometric configuration Cl-2 sensors Sensing mechanism