SERS hotspots growth by mild annealing on Au film over nanospheres, a natural lithography approach

A. Purwidyantri, C. H. Hsu, B. A. Prabowo, C. M. Yang, C. S. Lai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)
15 Downloads (Pure)

Abstract

Surface-enhanced Raman scattering (SERS) detection is a remarkably powerful optical sensing platform employing electromagnetic field amplification in hotspots area produced by nanoparticles. In this study, natural lithography was performed where a 5 nm Au was evaporated on an ITO substrate covered by periodic polystyrene (PS) nanospheres (d = 100 nm), called as Au Film over Nanospheres (AuFoN). The substrates went through a rapid thermal annealing (RTA) at 150°C. This temperature was preferred to maintain PS nanospheres from total structural damage while variance in RTA duration at 1, 3 and 5 minutes were applied to investigate the SERS output signal on the treated surfaces. A scanning electron microscopy (SEM) characterization shows the morphological changes of the substrate along with longer RTA duration. Up to 5 minutes of RTA, the periodic trace of PS nanospheres is well-preserved. Based on the atomic force microscope (AFM) screening, the longer RTA process produced higher surface roughness and generated more SERS hotspots. The maximum enhancement factor of SERS signal was obtained by 5 minutes RTA treatment given by the value of 3.16 x 103. The strong electromagnetic field was shown to be around the spherical line of the nanospheres according to the Finite-Difference Time-Domain method (FDTD) computation.

Original languageEnglish
Title of host publication3rd International Symposium on Green Technology for Value Chains, GreenVC 2018
Number of pages9
Volume277
Edition1
DOIs
Publication statusPublished - 11 Jun 2019
Externally publishedYes
Event3rd International Symposium on Green Technology for Value Chains, GreenVC 2018 - Bumi Serpong Damai (BSD) City - South Tangerang, Indonesia
Duration: 01 Nov 201802 Nov 2018

Publication series

NameIOP Conference Series: Earth and Environmental Science
ISSN (Print)1755-1307

Conference

Conference3rd International Symposium on Green Technology for Value Chains, GreenVC 2018
Country/TerritoryIndonesia
CityBumi Serpong Damai (BSD) City - South Tangerang
Period01/11/201802/11/2018

Bibliographical note

Funding Information:
The authors thank Chang Gung Memorial Hospital (CGMH) Taiwan, for the financial support under contract no. of CMRPD2G0102; Ministry of Science and Technology (MOST) Taiwan under the contract number of MOST 107-2911-I-182-502 and MOST 107-2218-E-182-006; Kurita Water and Environment Foundation (KWEF) Japan and Asian Institute of Technology (AIT) Thailand for Kurita-AIT Research Grant 2018; and the Indonesian Institute of Sciences.

Publisher Copyright:
© Published under licence by IOP Publishing Ltd.

ASJC Scopus subject areas

  • General Environmental Science
  • General Earth and Planetary Sciences

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