- 原著論文
論文発表：Fabrication of nanobullet structures composed of gold nanoparticles and titanium dioxide
柳谷伸一郎先生らの論文「Fabrication of nanobullet structures composed of gold nanoparticles and titanium dioxide」が掲載されました。
掲載誌等：Materials Science in Semiconductor Processing, 195, 109557, 2025.
DOI：10.1016/j.mssp.2025.109557
著者：Shin-ichiro Yanagiya, Akihiro Yamamoto, Satoshi Sugano and Retsuo Kawakami
DOI：10.1016/j.mssp.2025.109557
著者：Shin-ichiro Yanagiya, Akihiro Yamamoto, Satoshi Sugano and Retsuo Kawakami
要約：A nanobullet structure consisting of gold nanoparticles (AuNPs) at the apex and rod-shaped titanium dioxide in the main body was synthesized. Titanium oxide was vapor-phase-deposited by sputtering onto AuNPs (diameter of 40 nm) dispersed on a polymer substrate. Titanium dioxide nucleated preferentially on the AuNPs and grew via unidirectional solidification. A soft plastic film was selected as the substrate to isolate the nanobullet structures, which were mechanically separated by bending. High-resolution transmission electron microscopy and selected area diffraction analysis revealed that titanium dioxide exhibited an amorphous structure near the AuNPs, and anatase-type crystallites were observed after 100 nm of TiO2 growth. The amorphous phase appears because the anatase phase was unstable due to the strain introduced by the curvature of the AuNPs. Thermal treatment resulted in crystallization of TiO2 near the AuNPs.
