2015年 第76回応用物理学会秋季学術講演会

講演情報

シンポジウム(口頭講演)

シンポジウム » English session: Asian Joint Symposium on Nanobiotechnology

[14a-3A-1~8] English session: Asian Joint Symposium on Nanobiotechnology

2015年9月14日(月) 09:00 〜 11:45 3A (国際会議室)

Chair:Eiichi Tamiya(Osaka Univ.),Atsushi Miura(Hokkaido Univ.)

10:30 〜 11:00

[14a-3A-5] Plasmonic nanostructures based on self-assembled nanoparticles for biosensing

〇Kuniharu Ijiro1 (1.Hokkaido Univ.)

キーワード:nanoparticle,plasmon,self-assembly

We have fabricated tunable plasmonic nanostructures, the gap distances of which can be controlled by the salt concentration, through the formation of gold nanoparticle self-assembled thin films on solid substrates and their transferral onto poly-acrylic acid gel. The extinction spectra shifted reversibly with volume change of the gel according to the degree of swelling. When the target molecules were injected onto this substrate as the gaps were opened (widened) and SERS was measured after the gaps were closed (narrowed), the signals became stronger than that observed without any gap control. In the case of hemoglobin, as hemoproteins, signal intensities increased 10 fold and over with this active gap control.