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Gold nanocone array directly grown on nickel foam for improved SERS detection of aromatic dye

Abstract

An efficient SERS substrate composed of gold nanocone array with abundant sharp tips directly grown on 3D porous Ni foam (AuNCA@Ni foam) was developed for sensitive detection of aromatic dye. The AuNCA@Ni foam was prepared by a facile galvanic replacement reaction between Ni foam and HAuCl4 in the presence of cetyltrimethylammonium bromide (CTAB). The concentration of CTAB played an important role in determining the morphology of the product. Without CTAB, or replacing CTAB with other surfactants, no AuNCA could be obtained. Thanks to the abundant uniform sharp tips and 3D porous structure, the AuNCA@Ni foam displayed much stronger SERS enhancement ability and higher reproducibility for aromatic dye detection compared with those of substrates prepared in the absence of CTAB or in the presence of other surfactants. Moreover, the AuNCA@Ni foam with robust integrated structure also avoided the tedious operation of assembly and centrifugation. The SERS application of AuNCA@Ni foam was tested by the detection of aromatic dye crystal violet (CV) and Nile blue (NB), which achieved the detection limit (LOD) of 0.03 nM and 0.5 nM in standard solution respectively, and LOD of 3 nM for determining CV in real water sample.

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Supplementary files

Publication details

The article was received on 14 Apr 2018, accepted on 10 Jun 2018 and first published on 11 Jun 2018


Article type: Paper
DOI: 10.1039/C8AY00840J
Citation: Anal. Methods, 2018, Accepted Manuscript
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    Gold nanocone array directly grown on nickel foam for improved SERS detection of aromatic dye

    F. Xu, H. Lai and H. Xu, Anal. Methods, 2018, Accepted Manuscript , DOI: 10.1039/C8AY00840J

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