研究者詳細 - 小田　勝

論文 - 小田　勝

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Versatile implementation in angle-resolved optical microscopy: its application to local spectrometry of microcavities with PIC-J-aggregates

Y. Obara, K. Saitoh, M. Oda, and T. Tani

International Journal of Spectroscopy 2011 1 - 6 Article ID 523017_1-6 2011年08月

Single molecule FRET detection in CdSe-QD donor and Cy5-labeled molecular chaperone acceptor complex by imaging microscopy

T. Tani, M. Oda, H. Sakai, D. Araki, Y. Itoh, A. Ohtaki, and M.Yohda

Journal of Luminescence 131 519 - 522 2011年03月

Anomalous reflection properties in high density limit fibril shaped PIC-J aggregates in microcavity structure

Y. Obara, K. Saitoh, M. Oda, and T. Tani

Physica Status Solidi C 8 595 - 597 2011年02月

Photoluminescence properties of CdSe/ZnS/TOPO nanocrystals in full- and half-microcavity structures

M. Oda, H. Kazita, Y. Obara, and T. Tani

Physica Status Solidi C 8 423 - 425 2011年02月

Single molecule and single quantum dot photodynamics by polarization-rotating modulation microscopy

T. Tani, H. Sakai, E. Usukura, T. Suzuki and M. Oda：

Phys. Procedia 3 1607 - 1613 2010年02月

Fabrication, characterization and its local reflection properties of a metal-mirror microcavity with high concentrated PIC J-aggregates

M. Oda, Y. Obara, K. Saito, K. Higashi, and T. Tani

Physics Procedia 3 1615 - 1620 2010年02月

Energy transfer in hybrid CdSe quantum dots vs. labelled molecular chaperone systems by imaging microscopy 査読有り

Tani T., Horiuchi H., Oda M., Usukura E., Sakai H., Ohtaki A., Yohda M.

Physica Status Solidi (C) Current Topics in Solid State Physics 6 ( 4 ) 912 - 915 2009年09月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

Resonant energy transfer in hybrid CdSe quantum dot (QD) conjugated with Cy5-labelled molecular chaperone systems is observed with single molecule imaging technique. Photonic QDs are the core-shell type nanocrystals covered with organic surfactants on the outermost surfaces, i.e. CdSe/ZnS/TOPO's, and prefoldin (PFD) is used as prototype molecular chaperons. PFD is a jellyfish-shaped hexameric co-chaperone of group II chaperonins, which recognize hydrophobic portion of denatured proteins and encapsulate them within its central cavity. So the CdSe/ZnS/TOPO QDs can also be captured be cause of its surface similarity to the denatured proteins. We have found one possible reaction pathway to get such artificial complex in aqueous solutions with keeping bioactivities of the proteins. Performance of the complex is evaluated by TIRF imaging microscopy. As the proteins are transparent in visible wavelength region, labeling dyes, Cy5, which also work as acceptors, are connected to detect their behaviors microscopically. Forster type energy transfer is observed from the QD donors to Cy5-labeled PFD acceptors in single molecule level, which can be a distinct evidence for the complex formation. © 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

DOI： 10.1002/pssc.200880644

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=70349423882&origin=inward

Strong exciton-photon coupling and its polarization dependence in a metal-mirror microcavity with oriented PIC J-aggregates 査読有り

Oda M., Hirata K., Inoue T., Obara Y., Fujimura T., Tani T.

Physica Status Solidi (C) Current Topics in Solid State Physics 6 ( 1 ) 288 - 291 2009年04月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

We present a study of strong exciton-photon coupling and its dependence on incident light polarization in a metal-metal mirror microcavity containing PIC J-aggregates. Rabisplitting energies between upper and lower polariton branches are estimated as 94 meV and 69 meV for s- and p-polarized incident light, respectively. These large values are due to large oscillator strength of Frenkel excitons in the PIC J-aggregates and strong confinement of light attributed to the metallic microcavity as well. As for the effective thickness of the active layer for s-polarized light, a good agreement is tained between L efffit = 201nm deduced from the experimental data and Leffcalc = 207 ran calculated from the summation of the measured thickness of active layer with the estimated penetration depths into silver mirrors. We also discuss the difference in the polarization dependences of Rabi-splitting energy, quantitatively. It is concluded mat the polarization dependence is mainly due to an alignment of the J-aggregates in the active layer and is not affected so much by anisotropy of the penetration depths into the silver mirrors. © 2009 WILEY-VCH Verlag GmbH & Co. KGaA.

DOI： 10.1002/pssc.200879879

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=63449106843&origin=inward

Synthesis, characterization, and its PL dynamics of colloidal type II CdTe/CdSe nanocrystals 査読有り

Oda M., Nishiyama A., Marumo G., Yamada S., Tanaka E., Tani T.

Physica Status Solidi (C) Current Topics in Solid State Physics 6 ( 1 ) 61 - 64 2009年04月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

We describe our improved synthesis and optical properties of high quality type II CdTe/CdSe nanocrystals (NCs). Specifically, clear shell-thickness dependences have been observed in the absorption and photoluminescence (PL) spectra and FL decay profiles as well The magnitude of the lowest absorotion band decreases drastically with large redshift as the shell thickness increases. The origin will be discussed on the bases of the model where the spatial configuration of the lowest electron-hole pair in the NCs changes from that of type I to type II as the shell thickness increases. As for the PL lifetime of the lowest electron-hole excitations, substantial increase is observed with increasing shell thickness. This can also be understood by considering the spatial configuration; spatial overlap between electron and hole wavefunctions decreases with increasing shell thickness, thus the lifetime increases, As for the NCs with extremely thin shell (∼1 ML; 1 ML = 0.35 nm), the PL lifetime seems much longer than expected. This suggests that the thin shells seem imperfect and work rather a kind of trap sites than layers. © 2009 WILEY-VCH Verlag GmbH & Co. KGaA.

DOI： 10.1002/pssc.200879878

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=63449135740&origin=inward

Strong exciton-photon coupling and its polarization dependence in a metal-mirror microcavity containing oriented PIC J-aggregates

M. Oda, K. Hirata, T. Inoue, Y. Obara, T. Fujimura, and T. Tani

Physica Status Solidi 6 288 - 291 2009年01月

Synthesis, characterization, and its PL dynamics of colloidal type II CdTe/CdSe nanocrystals

M. Oda, A. Nishiyama, G. Marumo, S. Yamada, E. Tanaka, and T. Tani

Physica Status Solidi 6 61 - 64 2009年01月

FRET-structure with non-radiative acceptor provided by dye-linker-glass surface complex and single molecule photodynamics by TIRFM-polarized imaging

T. Tani, K. Mashimo, T. Suzuki, H. Horiuchi and M. Oda

Journal of Luminescence 128 757 - 760 2008年05月

Complex formation of CdSe/ZnS/TOPO nanocrystal vs. molecular chaperone in aqueous solution by hydrophobic interaction

H. Horiuchi, N. Iwami, F. Tachibana, A. Ohtaki, R. Iizuka, M. Oda, M. Yohda and T. Tani

Journal of Luminescence 127 192 - 197 2007年11月

Photoluminescence behaviors of single CdSe/ZnS/TOPO nanocrystals: Adsorption effects of water molecules onto nanocrystal surfaces

M. Oda, A. Hasegawa, N. Iwami, K. Nishiura, N. Ando, A. Nishiyama, H. Horiuchi and T. Tani

Journal of Luminescence 127 198 - 203 2007年11月

Reversible photobluing of CdSe/ZnS/TOPO nanocrystals

M. Oda, A. Hasegawa, N. Iwami, K. Nishiura, N. Ando, A. Nishiyama, H. Horiuchi and T. Tani

Colloids and Surfaces B: Biointerfaces 56 241 - 245 2007年04月

Photobrightening of CdSe/ZnS/TOPO nanocrystals

M. Oda, J. Tsukamoto, A. Hasegawa, N. Iwami, K. Nishiura, I. Hagiwara, N. Ando, H. Horiuchi and T. Tani

Journal of Luminescence 122-123 762 - 765 2007年01月

Anisotropic observation of absorption and fluorescence transition dipoles in exciton-polariton properties of PIC J-aggregates

T. Tani, M. Oda, T. Hayashi, H. Ohno and K. Hirata

Journal of Luminescence 122-123 244 - 246 2007年01月

Magneto-optical Imaging Using Polarization Modulation Method

T. Ishibashi, Z. Kuang, S. Yufune, T. Kawata, M. Oda, T. Tani, Y. Iimura, and K. Sato

Journal of Applied Physics 100 093903_1 - 093903_6 2006年11月

Real Time Magneto-optical Imaging using Liquid Crystal Modulator

T. Ishibashi, S. Yufune, T. Kawata, M. Oda, T. Tani, Y. Iimura, Y. Konishi, K. Akahane and K. Sato

Journal of the magnetic society of Japan 30 578 - 580 2006年11月

Photoluminescence of CdSe/ZnS/TOPO nanocrystals expanded on silica glass substrates: Adsorption and desorption effects of polar molecules on nanocrystal surfaces

M. Oda, J. Tsukamoto, A. Hasegawa, N. Iwami, K. Nishiura, I. Hagiwara, N. Ando, H. Horiuchi and T. Tani

Journal of Luminescence 119-120 570 - 575 2006年07月

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