Surface enhanced Raman scattering of nanoporous gold: Smaller pore sizes stronger enhancements

L. H. Qian, X. Q. Yan, T. Fujita, A. Inoue, M. W. Chen

研究成果: Article査読

328 被引用数 (Scopus)

抄録

The authors report the surface enhanced Raman scattering (SERS) of nanoporous gold with nanopore sizes ranging from 5 to 700 nm. Their comprehensive investigations prove that the strongest SERS enhancement of nanoporous gold takes place from the samples with an ultrafine nanopore size of ∼5-10 nm. Both the enhancement factor and detection limit of the ultrafine nanoporous substrate are one to two orders of magnitude better than those of coarsened nonporous gold with smooth surfaces. Moreover, careful microstructure characterization reveals that the anomalous SERS enhancement of the annealed nanoporous gold arises from rough surfaces with characteristic surface irregularities.

本文言語English
論文番号153120
ジャーナルApplied Physics Letters
90
15
DOI
出版ステータスPublished - 2007
外部発表はい

ASJC Scopus subject areas

  • 物理学および天文学(その他)

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