Direct Chemical Synthesis of Plasmonic Black Colloidal Gold Superparticles with Broadband Absorption Properties

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Self-assembly of plasmonic metal nanoparticles can provide an opportunity of creating colloidal superparticles with fascinating optical properties arising from interparticle plasmonic coupling, but typically requires multiple steps involving solvent and/or ligand exchange. We developed a direct, one-step chemical synthesis of plasmonic black colloidal Au superparticles with broadband absorption in visible and near-infrared regions. During the synthesis, the Au superparticles were formed through self-assembly of in-situ-formed Au nanoparticles driven by solvophobic interactions between nanoparticles and solvent. These superparticles could be solution-processed to fabricate a thin film, which exhibited near-perfect absorption over a broad range from 400 nm to 2.5 mu m as well as the excellent antireflective property. Thanks to their broadband absorption property, the Au superparticles showed good performances for near-infrared surface-enhanced Raman spectroscopy and light-to-heat conversion.
Publisher
AMER CHEMICAL SOC
Issue Date
2018-09
Language
English
Article Type
Article
Keywords

ENHANCED RAMAN-SPECTROSCOPY; PHOTOTHERMAL THERAPY; CARBON NANOTUBES; CANCER-TREATMENT; SERS NANOTAGS; NEAR-FIELD; NANOPARTICLES; ABSORBER; SUPERSTRUCTURES; NANOSTRUCTURES

Citation

NANO LETTERS, v.18, no.9, pp.5927 - 5932

ISSN
1530-6984
DOI
10.1021/acs.nanolett.8b02629
URI
http://hdl.handle.net/10203/246150
Appears in Collection
MS-Journal Papers(저널논문)
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