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Colloidal porous gold nanoparticles

Abstract

Porous Au nanostructures have attracted much attention for their wide uses as catalysts, sensors, actuators and surface-enhanced Raman scattering (SERS) substrates. The synthesis of porous Au nanostructures has mainly relied on dealloying approaches, which generally involve high-temperature treatment to form alloys and subsequent harsh chemical etching. Herein we report on an ambient wet-chemistry method for the synthesis of colloidal porous Au nanoparticles. The synthesis takes advantage of the growth of Au on PbS nanocrystals accompanied with the etching of PbS by the growth solution. The obtained porous Au nanoparticles display a SERS enhancement factor of (1.23 ± 0.10) × 107 on the individual particles under off-resonance excitation and a catalytic activity that is several times those of previously reported porous Au particles and porous Au sheets. Our results will have high impact on many SERS-based analytical and biomedical applications and on the field of Au-based catalysis.

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Supplementary files

Publication details

The article was received on 31 Jul 2018, accepted on 13 Sep 2018 and first published on 14 Sep 2018


Article type: Communication
DOI: 10.1039/C8NR06149A
Citation: Nanoscale, 2018, Accepted Manuscript
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    Colloidal porous gold nanoparticles

    J. Hu, R. Jiang, H. Zhang, Y. Guo, J. Wang and J. Wang, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR06149A

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