Effects of shape and size on field enhancement of Au nanoparticles on SERS-active substrates

Hui Wen Cheng*, Yiming Li, Jung Yen Yang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

In this work, we study surface enhanced Raman spectroscopy (SERS) active substrates with low background for the detection of Rhodamine 6G. In our experimental evaluations, the surface enhanced Raman scattering signals from the surface substrates with a duration of 12-hour treatment and without treatment are obtained. Through three-dimensional (3D) finite-difference time-domain (FDTD) numerical simulation, we find that the structures with vertical variations of surface have larger field enhancement than that of horizontal variations which implies a strong positive effect on the local field enhancement. Moreover, the field enhancements are sensitive to the diameter and the shape of Au nanoparticles. We further find the 35-nm cubic shape of Au nanoparticle shows relatively larger electric field enhancement than that of spherical one.

Original languageEnglish
Title of host publication2010 10th IEEE Conference on Nanotechnology, NANO 2010
Pages732-735
Number of pages4
DOIs
StatePublished - 2010
Event2010 10th IEEE Conference on Nanotechnology, NANO 2010 - Ilsan, Gyeonggi-Do, Korea, Republic of
Duration: 17 Aug 201020 Aug 2010

Publication series

Name2010 10th IEEE Conference on Nanotechnology, NANO 2010

Conference

Conference2010 10th IEEE Conference on Nanotechnology, NANO 2010
CountryKorea, Republic of
CityIlsan, Gyeonggi-Do
Period17/08/1020/08/10

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