Colorimetric plasmon sensors with multilayered metallic nanoparticle sheets

Shuhei Shinohara, Daisuke Tanaka, Koichi Okamoto, Kaoru Tamada

研究成果: Contribution to journalArticle査読

20 被引用数 (Scopus)

抄録

Colorimetric plasmon sensors for naked-eye detection of molecular recognition events have been proposed. Here, 3-layered Ag nanoparticle (NP) sheets on a Au substrate fabricated using the Langmuir-Schaefer method were utilized as the detection substrates. A drastic color change was observed following the binding of Au NPs via avidin-biotin interactions at less than 30% surface coverage. The color change was attributed not only to the localized surface plasmon resonance (LSPR) of the adsorbed Au NPs but also to the multiple light trapping effect derived from the stratified Au and Ag NPs, as predicted by a finite-difference time-domain (FDTD) simulation. This plasmonic multi-color has great potential in the development of simple and highly sensitive diagnostic systems.

本文言語英語
ページ(範囲)18606-18612
ページ数7
ジャーナルPhysical Chemistry Chemical Physics
17
28
DOI
出版ステータス出版済み - 7 28 2015

All Science Journal Classification (ASJC) codes

  • 物理学および天文学(全般)
  • 物理化学および理論化学

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