Choi, Myung Sik Na, Han Gil Shim, Gyu Sam Cho, Jae Hee Kim, Min Young Kim, Sang-il Baek, Seung-Hyub Jin, Changhyun Lee, Kyu Hyoung 2024-01-19T14:33:40Z 2024-01-19T14:33:40Z 2022-01-10 2021-05-15 0272-8842 https://pubs.kist.re.kr/handle/201004/116989 The urchin-like nanoparticles of semiconducting oxides have been attracting considerable attention as they can significantly improve reactivity owing to their enlarged surface areas. Herein, we report a simple and scalable synthesis method of ZnO nanomaterials via a microwave-assisted drying process. Commercial ZnO powders (-300 nm) and expanded graphite were used as starting materials to prepare urchin-like ZnO nanoparticles with nanoscale legs (diameter -20 nm) by triggering the rapid phase transformation, which was induced by a repeated microwave irradiation in an alumina crucible for a few minutes. The possible mechanisms to trigger this morphological and dimensional change are described in detail. The high-yield production and superior reproducibility completed in shortened processing times enable this synthetic route to be widely applicable for the massive production of nanostructured oxide particles. English ELSEVIER SCI LTD Simple and scalable synthesis of urchin-like ZnO nanoparticles via a microwave-assisted drying process Article 10.1016/j.ceramint.2021.02.045 1 CERAMICS INTERNATIONAL, v.47, no.10, pp.14621 - 14629 CERAMICS INTERNATIONAL 47 10 14621 14629 scie scopus 000638270900005 2-s2.0-85100827582 Materials Science, Ceramics Materials Science Article ZnO Expandable graphite Nanoparticles Microwave Drying process