Glass nanopillar arrays with nanogap-rich silver nanoislands for highly intense surface enhanced Raman scattering

Young-Jae Oh; Ki-Hun Jeong

doi:10.1002/adma.201104696

Glass nanopillar arrays with nanogap-rich silver nanoislands for highly intense surface enhanced Raman scattering

Adv Mater. 2012 May 2;24(17):2234-7. doi: 10.1002/adma.201104696. Epub 2012 Mar 27.

Authors

Young-Jae Oh¹, Ki-Hun Jeong

Affiliation

¹ Department of Bio and Brain Engineering, KAIST Institute for Optical Science and Technology, Korea Advanced Institute of Science and Technology (KAIST), Yuseong-gu, Daejeon, Korea.

PMID: 22454295
DOI: 10.1002/adma.201104696

Abstract

The enhancement of surface enhanced Raman scattering (SERS) with nanogap-rich silver nanoislands surrounding glass nanopillars at wafer level is reported. High-density hot spots are generated by increasing the number of nanogap-rich nanoislands within a detection volume. The SERS substrate shows a high enhancement factor of over 10(7) with excellent signal uniformity (∼7.8%) and it enables the label-free detection of aqueous DNA base molecules at nanomolar level.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

DNA / chemistry
Glass
Nanostructures / chemistry*
Nanostructures / ultrastructure
Nanotechnology
Silver / chemistry*
Spectrum Analysis, Raman*

Substances

Silver
DNA