Salt-Induced Self-assembly of Au Nanoparticles and Sedimentation Enables Plasmonic Black Au film with Broadband Absorption Properties

doi:10.7503/cjcu20200181

Abstract

Abstract: Plasmonic black gold film from Au NPs was prepared via salt-induced self-assembly and sedimentation method. That were accomplished by addition of inorganic salt into Au colloids to induce the self-assembly of Au NPs and subsequent sedimentation of the resultant Au NP assembly into black Au film. The as-prepared black Au film shows strong absorption capability(>80%) in a broadband range of 400-1600 nm, reaching 94% in the visible range of 400-800 nm. Consequently, it shows high light-heat conversion capability and broadband high surface-enhanced Raman scattering(SERS) activity. These results, thus, offer a facile preparation strategy for plasmon black Au, which shows great potential in seawater desalination, quick SERS detection, and beyond.

Key words: Black gold, Plasmon, Broadband absorption, Light-heat conversion, Surface-enhanced Raman scattering

CLC Number:

O643

TrendMD:

ZHANG Mengyao, YU Renpeng, HAN Mei, LIU Jianfang, LI Moxia, HU Jiawen, TIAN Zhongqun. Salt-Induced Self-assembly of Au Nanoparticles and Sedimentation Enables Plasmonic Black Au film with Broadband Absorption Properties[J]. Chem. J. Chinese Universities, 2020, 41(8): 1903.

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