Mechanism study of metallic oxide nanorods fabricated by submerged photosynthesis of crystallites

2021 Fiscal Year Annual Research Report

• Project/Area Number: 20K15122
• Research Institution: Hokkaido University
• Principal Investigator: JEEM MELBERT 北海道大学, 電子科学研究所, 助教 (00815805)
• Project Period (FY): 2020-04-01 – 2022-03-31
• Keywords: ZnO / Nanorods / Simonkolleite / STEM-VEELS / DFT

Outline of Annual Research Achievements

When ZnO surface is immersed into NaCl aqueous solution, the growth orientation changed from nanorods to hexagonal platelets (simonkolleite) with composition formula Zn5(OH)8Cl2H2O. Conventionally, this is due to polarization mechanism of ZnO <001> to ZnO <110>. However, HRTEM observation revealed a lattice plane transformation of ZnO(002) to ZnO(110) in accordance with the UV irradiation time. With Zn5(OH)8Cl2H2O was still non-stoichiometric even after the pristine (110) surface in <001> direction was formed, multiple defects (O,Cl,H) effect was studied in detailed via STEM-VEELS and DFT calculations. The result showed intercalated Zn(OH)3Cl in simonkolleite structure responsible for energy transfer toward outmost ZnO surface layer, permitting the ZnO (002) to (110) plane transformation.

Research Products

• [Journal Article] The origin of opto-functional enhancement in ZnO/CuO nanoforest structure fabricated by submerged photosynthesis (2022)
  • Author(s): Takahashi Yuki、Jeem Melbert、Zhang Lihua、Watanabe Seiichi
  • Journal Title: Applied Materials Today Volume: 26 Pages: 101359～101359
  • DOI: 10.1016/j.apmt.2021.101359
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Fabrication of color-toned micro/nanopattern surface by submerged photosynthesis method (2022)
  • Author(s): Tsukamura Jumpei、Takahashi Yuki、Zhang Lihua、Jeem Melbert、Okamoto Kazumasa、Watanabe Seiichi
  • Journal Title: Microelectronic Engineering Volume: 256 Pages: 111727～111727
  • DOI: 10.1016/j.mee.2022.111727
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Photo- & radio-chromic iron-doped tungstic acids fabricated via submerged photosynthesis (2022)
  • Author(s): Murakami Shuntaro、Zhang Lihua、Jeem Melbert、Okamoto Kazumasa、Nakagawa Yuki、Shibayama Tamaki、Ohnuma Masato、Watanabe Seiichi
  • Journal Title: Optical Materials Volume: 124 Pages: 111966～111966
  • DOI: 10.1016/j.optmat.2021.111966
  • Peer Reviewed / Int'l Joint Research
• [Presentation] The origin of opto-functional enhancement in ZnO/CuO nanoforest structure fabricated by submerged photosynthesis (2022)
  • Author(s): Jeem Melbert, Takahashi Yuki, Zhang Lihua, Watanabe Seiichi
  • Organizer: The 69th JSAP Spring Meeting 2022
• [Presentation] Understanding opto-electrical emission and absorption behavior in corrosion by-product of zinc (2021)
  • Author(s): Jeem Melbert, Fujioka Masaya, Ono Madoka, Watanabe Seiichi, Nishii Junji
  • Organizer: MNC 2021
  • Int'l Joint Research
• [Presentation] Multi-defects effect for ZnO lattice reconfiguration during submerged photo-synthesis of crystallites (2021)
  • Author(s): Jeem Melbert, Fujioka Masaya, Ono Madoka, Watanabe Seiichi, Nishii Junji
  • Organizer: 令和3年度日本顕微鏡学会北海道支部学術講演会