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Silver nanostructure arrays abundant in sub-5nm gaps as highly Raman-enhancing substrates
- Source :
-
Applied Surface Science . Feb2012, Vol. 258 Issue 8, p3519-3523. 5p. - Publication Year :
- 2012
-
Abstract
- Abstract: Two types of highly Raman-enhancing arrays substrates were fabricated using anodic aluminum oxide (AAO) templates by controlling the AAO template temperature and evaporated silver thickness during e-beam evaporating: complex patterned Ag nanoparticle arrays abundant in sub-5nm gaps (type I); hexagonal Ag nanopore arrays (type II). The surface enhanced Raman scattering (SERS) enhancement factors (EF) of both substrates are estimated experimentally to exceed 105, especially that of type I reaches 107 due to the existence of numerous sub-5nm gaps. The simulation using finite-difference time-domain (FDTD) method confirmed that gap effect has significantly improved the substrates’ SERS activity. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 01694332
- Volume :
- 258
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Applied Surface Science
- Publication Type :
- Academic Journal
- Accession number :
- 71334193
- Full Text :
- https://doi.org/10.1016/j.apsusc.2011.11.106