Direct synthesis of monolayer gold nanoparticles on epoxy based photoresist by photoreduction and application to surface-enhanced Raman sensing

Yi Jui Chen, Wen Huei Chang, Chia Ying Li, Yi Chun Chiu, Chih Chia Huang, Chun Hung Lin

Research output: Contribution to journalArticlepeer-review

Abstract

The photoreduction method is a potential method in terms of simplification, speed and cost of the process. This paper presents a simple and novel method for the direct synthesis of a gold nanoparticle monolayer with a droplet of gold precursor on the surface of SU-8 under UV exposure. Photoreduction ability on different polymer surfaces with various photoinitiator concentrations was investigated. The horizontal and vertical distributions of reduced nanoparticles were examined by using a scanning electron microscope and a transmission electron microscope, and crystalline property was verified through energy dispersive X-ray spectroscopy. The influence of SU-8 initial curing time and reduction repetition times on nanoparticle sizes and densities was investigated. The same photoreduction process is applicable to the surface of SU-8 nanostructures. The use of SU-8 nanopillars as a photoreduction substrate can provide a high specific surface area for improving the density of hot spots in the application of surface-enhanced Raman spectroscopy.

Original languageEnglish
Article number109211
JournalMaterials and Design
Volume197
DOIs
Publication statusPublished - 2021 Jan 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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