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Proceedings Paper

Bioapplication of plasmonic nanosheet
Author(s): K. Tamada; K. Michioka; X. Li; Y. Ikezoe; M. Saito; K. Otsuka
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Paper Abstract

In this paper, we present our recent progress to fabricate "plasmonic silver nanosheet" for highly sensitive biosensing devices. Uniformly sized silver nanoparticles (d = 4.8 nm ± 0.1 nm) are deposited on the substrate as a homogeneous nanosheet composed of two dimensional crystalline domains, in which the distance between silver cores is accurately controlled by the thickness of the capping organic molecules (myristate, alkanethiols). The silver nanosheet exhibits a significant shift of plasmon absorption band to the longer wavelength (ca. 50 nm) from the position in dispersion solution, while the peak width was rather reduced (sharpened) as an evidence of homogeneous coupling of local plasmons. We also found the unique coupling between propagating surface plasmon on gold thin film and localized surface plasmon on silver nanosheet. This flexible, transferable nanosheet, which can trap and transport bulk light at nano-interface, promises new application in the field of bio- and organic devices.

Paper Details

Date Published: 12 February 2009
PDF: 8 pages
Proc. SPIE 7213, Organic Photonic Materials and Devices XI, 72130E (12 February 2009); doi: 10.1117/12.814977
Show Author Affiliations
K. Tamada, Tohoku Univ. (Japan)
Tokyo Institute of Technology (Japan)
K. Michioka, Tohoku Univ. (Japan)
Tokyo Institute of Technology (Japan)
X. Li, Tokyo Institute of Technology (Japan)
Y. Ikezoe, RIKEN (Japan)
M. Saito, Tohoku Univ. (Japan)
Tokyo Institute of Technology (Japan)
K. Otsuka, Tohoku Univ. (Japan)
Tokyo Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 7213:
Organic Photonic Materials and Devices XI
Robert L. Nelson; François Kajzar; Toshikuni Kaino, Editor(s)

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