Colloidal porous gold nanoparticles
Colloidal porous gold nanoparticles
复制标题
胶体多孔金纳米颗粒
DOI：
10.1039/c8nr06149a
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发表时间：
2018-10-21
期刊：
影响因子：
6.7
通讯作者：
Wang, Jianfang
中科院分区：
文献类型：
--
作者：
Hu, Jinhui;Jiang, Ruibin;Wang, Jianfang
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 by the etching of PbS by the growth solution. The obtained porous Au nanoparticles display a SERS enhancement factor of (1.23 +/- 0.10) x 10(7) 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.
