Surface Functionalization of Graphene Oxide with Polystyrene Sulfonic Acid Brushes to Fabricate Hierarchical Ag and Au Microstructures as SERS Substrates

Author:

Li Xuan1,Huang Kaige1,Zhou Yumeng1,Wang Wenqin1ORCID

Affiliation:

1. School of Materials Science and Chemical Engineering Ningbo University No. 818, Fenghua Road Ningbo 315211 P. R. China

Abstract

AbstractIn this work, we reported the spontaneous growth of Ag and Au microstructures on the surface of the graphene oxide‐grafted‐polystyrene sulfonic acid brushes (GO‐g‐PSSA) in Ag(NH3)2OH solution and HAuCl4 solution, respectively. The influences of reaction time and temperature on the morphology and size of Ag (Au) particles were investigated. By optimizing reaction conditions, Ag nanosheet‐assembled microstructures and sea urchin‐like Au microspheres were obtained. These hierarchical Ag (Au) microstructures with highly nanotextured topographies could provide many “hot spots” for surface‐enhanced Raman spectroscopy (SERS). The as‐prepared GO‐g‐PSSA/Ag (Au) composites exhibited excellent SERS performances using Rhodamine 6G (R6G) as the probe molecules and the detection limit of R6G was up to 10−12m.

Funder

Natural Science Foundation of Ningbo

Publisher

Wiley

Subject

General Chemistry

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