[22a-P01-1~10] 1.3 Novel technologies and interdisciplinary engineering

[22a-P01-4] Fabrication of Quantum Dots / TiO₂ Hybrid Photonic Crystal for Optical Biosensor Application in Visible Regioin

〇Shotaro Ueda¹, Daiki Kasawaki¹, Ryosuke Nishitsuji¹, Hirotaka Yamada¹, Kenji Sueyoshi^1,2, Hideaki Hisamoto¹, Tatsuro Endo¹ (1.Osaka Pref. Univ., 2.JST PRESTO)

Keywords:Photonic crytsal, Quantum dots, Label-free biosensor

Photonic crystal (PhC) is a dielectric material with a nanoscale periodic refractive index distribution. We have successfully applied the TiO₂ PhC to a sensor that can be measured with a simple optical set up and a visible region light source. However, the existing PhC sensors detect from the amount of wavelength shift, and the response mechanism needed to be improved for further sensitivity. In this study, based on the idea of combining luminescent material and PhC, we fabricated Quantum dots / TiO₂ hybrid PhC and applied to a sensor that can be determined fg/ml order of protein adsorption.