Issue 8, 2015

Ni/Au hybrid nanoparticle arrays as a highly efficient, cost-effective and stable SERS substrate

Abstract

A large-area cost-effective Ni/Au hybrid nanoparticle array is synthesized with a proposed versatile and simple process by depositing Au on the pre-prepared arrays of Ni particles with ultra-thin alumina membranes as shadow mask during the deposition. A highly efficient and stable surface enhancement Raman scattering (SERS) substrate could be obtained from utilizing the resulting regular pattern of Ni/Au NP arrays. As compared with the single Au NP arrays, a largely decreased Au evaporation thickness and much lesser Au is needed for achieving the same Raman enhancement factor for the Ni/Au NP arrays. Subsequent SERS spectra measurement of the crystal violet (CV) molecule detection indicate a good SERS-active sensitivity with a detection limit of 10−10 M concentration, a large Raman enhancement factor at 108 was obtained, excellent SERS signal reproducibility with a relative standard deviation (RSD) as low as 6–7% as well as a great long term stability at 10 months.

Graphical abstract: Ni/Au hybrid nanoparticle arrays as a highly efficient, cost-effective and stable SERS substrate

Supplementary files

Article information

Article type
Paper
Submitted
26 ဩ 2014
Accepted
15 ဒီ 2014
First published
15 ဒီ 2014

RSC Adv., 2015,5, 6172-6180

Ni/Au hybrid nanoparticle arrays as a highly efficient, cost-effective and stable SERS substrate

Q. Fu, K. M. Wong, Y. Zhou, M. Wu and Y. Lei, RSC Adv., 2015, 5, 6172 DOI: 10.1039/C4RA09312G

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