title: A facile synthesis of multi metal-doped rectangular ZnO nanocrystals using a nanocrystalline metal-organic framework template.
abstract: A multi metal (M: Fe, Co, and Ni)-doped rectangular ZnO nanocrystal (r-ZnO:M) was synthesised using nanocrystalline metal-organic framework-5 (n-MOF-5). After calcination in air, M-inserted n-MOF-5 led to r-ZnO:M of the wurtzite crystal structure with a small amount (<1%) of spinel ZnM2O4 phase. The inserted metal atoms of r-ZnO:M, replacing the Zn atoms of the wurtzite ZnO structure, were well-dispersed throughout the nanocrystal. Density functional theory calculations not only confirm the structural stability of wurtzite r-ZnO:M and negligible contribution of spinel ZnM2O4 but also elucidate the experimentally observed increase of visible light absorbance and appearance of ferromagnetism upon metal atom doping.
authors.affiliation: Department of Materials Science & Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701, Republic of Korea.
authors.forename: Dong Ki
authors.initials: DK
authors.lastname: Lee
authors.forename: Jung Hyo
authors.initials: JH
authors.lastname: Park
authors.forename: Ji Il
authors.initials: JI
authors.lastname: Choi
authors.forename: Yeob
authors.initials: Y
authors.lastname: Lee
authors.forename: Sang Jun
authors.initials: SJ
authors.lastname: Kim
authors.forename: Gyu-Heon
authors.initials: GH
authors.lastname: Lee
authors.forename: Yong-Hoon
authors.initials: YH
authors.lastname: Kim
authors.forename: Jeung Ku
authors.initials: JK
authors.lastname: Kang