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Electrochemical Synthesis of Flower-Like Gold Nanoparticles for SERS Application

  • Ngan Truc-Quynh LuongEmail author
  • Dao Tran Cao
  • Cao Tuan Anh
  • Kieu Ngoc Minh
  • Nguyen Ngoc Hai
  • Le Van Vu
Article

Abstract

Surface-enhanced Raman spectroscopy (SERS) is a technique that is increasingly used in the identification and quantification of organic molecules at very low concentrations. In this analytical technique SERS-active substrates play a crucial role. Beside silver, gold is also widely used as a material for making SERS substrates. In this report we present a simple method for synthesizing arrays of flower-like gold nanoparticles (also referred to as gold nanoflowers—AuNFs), which can be used as SERS substrates. The AuNFs have been electrodeposited on a silicon surface coated with silver nanoparticles, which served as seeds for the growth of AuNFs. As a result, AuNFs were formed on the silicon surface with relatively dense density and with fairly uniform distribution. Arrays of AuNFs, as SERS substrates, were tested with a rhodamine B (RhB) molecular probe. The results showed that these AuNFs allow the detection of RhB down to a concentration of 1 ppb, a relatively low concentration. This demonstrates the applicability of fabricated AuNFs as a highly active SERS substrate.

Keywords

Gold nanoflowers electrodeposition surface-enhanced Raman spectroscopy rhodamine B 

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Notes

Acknowledgments

This work was supported financially by the Ministry of Science and Technology of Vietnam under Project 01/2018/DTDL.CN-XNT.

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Institute of Materials ScienceVietnam Academy of Science and TechnologyHanoiVietnam
  2. 2.Graduate University of Science and TechnologyVietnam Academy of Science and TechnologyHanoiVietnam
  3. 3.Tan Trao UniversityTrung Mon Commune, Yen Son DistrictVietnam
  4. 4.Quang Ninh Department of Education and TrainingHalongVietnam
  5. 5.University of ScienceHanoiVietnam

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