Open AccessAtmospheric Pressure Plasma-Synthesized Gold Nanoparticle/Carbon Nanotube Hybrids for Photothermal Conversion
Author(s) -
Daye Sun,
James R. McLaughlan,
Li Zhang,
Brian G. Falzon,
Davide Mariotti,
Paul Maguire,
Dan Sun
Publication year - 2019
Publication title -
langmuir
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.042
H-Index - 333
eISSN - 1520-5827
pISSN - 0743-7463
DOI - 10.1021/acs.langmuir.8b03945
Subject(s) - photothermal therapy , carbon nanotube , nucleation , colloidal gold , x ray photoelectron spectroscopy , nanoparticle , raman spectroscopy , photothermal effect , atmospheric pressure plasma , chemical engineering , atmospheric pressure , nanotechnology , aqueous solution , chemistry , raman scattering , materials science , surface modification , nanotube , plasma , organic chemistry , physics , oceanography , optics , quantum mechanics , geology , engineering
In this work, a room-temperature atmospheric pressure direct-current plasma has been deployed for the one-step synthesis of gold nanoparticle/carboxyl group-functionalized carbon nanotube (AuNP/CNT-COOH) nanohybrids in aqueous solution for the first time. Uniformly distributed AuNPs are formed on the surface of CNT-COOH, without the use of reducing agents or surfactants. The size of the AuNP can be tuned by changing the gold salt precursor concentration. UV-vis, ζ-potential, and X-ray photoelectron spectroscopy suggest that carboxyl surface functional groups on CNTs served as nucleation and growth sites for AuNPs and the multiple potential reaction pathways induced by the plasma chemistry have been elucidated in detail. The nanohybrids exhibit significantly enhanced Raman scattering and photothermal conversion efficiency that are essential for potential multimodal cancer treatment applications.
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