Sugai-Kuwahara Research Group

Department of Chemistry, Toho University

We are focusing on science at the nanoscale, especially structure-controlled nanomaterials for the unique physical and chemical properties. We develop the efficient analytical method to know the structure of 'one' nanoparticle, and investigate its physical properties.

We also investigate the dynamics occurred at liquid/solid interface, such as dye-sensitized solar cells, getting the maximum efficiency out of its device.

Recent publication

"Copper sulfide nanoribbon growth triggered by carbon nanotube aggregation via dialysis"
T. Tanaka, M. Kurihara, M. Kuwahara and S. Kuwahara
RSC Adv., 12, 31363 (2022). DOI: 10.1039/d2ra04832a

"Transient electron energy-loss spectroscopy of optically stimulated gold nanoparticles using picosecond pulsed electron beam"
M. Kuwahara, L. Mizuno, R. Yokoi, H. Morishita, T. Ishida, K. Saitoh, N Tanaka, S. Kuwahara and T. Agemura
Appl. Phys. Lett., 121, 143503 (2022). DOI: 10.1063/5.0108266

"Role of constituents for the chirality isolation of single-walled carbon nanotubes by the reversible phase transition of a thermoresponsive polymer"
E. Shimura, T. Tanaka, Y. Kuwahara, T. Saito, T. Sugai and S. Kuwahara
RSC Adv., 10, 24570 (2020). DOI: 10.1039/D0RA04357E

"Localized Surface Plasmon Resonance-Induced Welding of Gold Nanotriangles and the Local Plasmonic Properties for Multicolor Sensing and Light-Harvesting Applications"
S. Kuwahara, Y. Narita, L. Mizuno, H. Kurotsu, H. Yoshino, and M. Kuwahara
ACS Appl. Nano Mater., 3, 5172 (2020). DOI: 10.1021/acsanm.0c00608

"Quantum Yield Enhancement in Graphene Quantum Dots via Esterification with Benzyl Alcohol"
S. Tachi, H. Morita, M. Takahashi, Y. Okabayashi, T. Hosokai, T. Sugai and S. Kuwahara
Sci. Rep., 9, 14115 (2019). DOI: 10.1038/s41598-019-50666-3

"Aqueous synthesis of protectant-free copper nanocubes by a disproportionation reaction of Cu2O on synthetic saponite"
M. Miyagawa, M. Usui, Y. Imura, S. Kuwahara, T. Sugai and H. Tanaka
Chem. Commun., 54, 8454 (2018). DOI: 10.1039/C8CC03182G

"Selective extraction of semiconducting single-walled carbon nanotubes with a thermoresponsive polymer"
E. Shimura, T. Sugai and S. Kuwahara
Chem. Commun., 54, 3026 (2018). DOI: 10.1039/C8CC00748A

"Charge carrier kinetics in hematite with NiFeOx coating in aqueous solutions: Dependence on bias voltage"
W. Y. Sohn, J. E. Thorne, Y. Zhang, S. Kuwahara, Q. Shen, D. Wang and K. Katayama
J. Photochem. Photobio. A, 353, 344 (2018). DOI: 10.1016/j.jphotochem.2017.11.029