@article{oai:u-ryukyu.repo.nii.ac.jp:02011219,
 author = {Atwa, Mohamed and Nakagawa, Tessui and Yonamine, Akira and Lloyd, David C. and Schreiber, Makoto and Miyazaki, Koji and Takeuchi, Tsunehiro and Okada, Yoshinori},
 issue = {067002-1},
 journal = {Applied Physics Express},
 month = {May},
 note = {We compare Bi_2Te_3 powders prepared by conventional ball milling to powders milled in supercritical carbon dioxide (scCO_2). We demonstrate that scCO_2 milling overcomes size-reduction limitations reported for conventional milling. XRD and TEM reveal nanograins with smaller average sizes (< 10 nm) and narrower grain size distributions in the scCO_2 milled case. scCO_2 milling also preserves the crystallinity and shows less oxidation than conventional milling. This is the first report of Bi_2Te_3 with a sub-10 nm grain size whilst conserving high quality crystallinity, made using a top-down approach. Our study offers a route for developing unprecedentedly fine bulk nanostructured Bi_2Te_3-based thermoelectric materials., 論文},
 title = {Top-down approach using supercritical carbon dioxide ball milling for producing sub-10 nm Bi_2 Te_3 grains},
 volume = {13},
 year = {2020}
}