Hollow single-crystal spinel nanocubes: the case of zinc cobalt oxide grown by a unique Kirkendall effect.
Small hollow nanocubes of the ternary spinel Zn x Co 1- x Co 2O 4 of ca. 18 nm dimension were prepared via a facile hydrothermal route. A growth mechanism is suggested in which solid single-crystal Co 3O 4 nanocubes are gradually converted to hollow single-crystal Zn x Co 1- x Co 2O 4 nanocubes with preservation of the spinel framework through differential diffusion of Zn (2+) and Co (2+) ions. With the cation exchange, the chemical composition and thus physical properties can be tailored.
Tian
Li
L
State Key Laboratory of Optoelectronic Materials and Technology, School of Chemistry and Chemical Engineering, Instrumental Analysis and Research Center, Sun Yat-Sen (Zhongshan) University, Guangzhou, People's Republic of China.
Yang
Xianfeng
X
Lu
Ping
P
Williams
Ian D
ID
Wang
Caihong
C
Ou
Shunying
S
Liang
Chaolun
C
Wu
Mingmei
M
D003035:Cobalt / Q000737:chemistry*; D003460:Crystallization; D015394:Molecular Structure; D049329:Nanostructures / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D017967:Zinc Compounds / Q000737:chemistry*
D010087:Oxides; D017967:Zinc Compounds; D003035:Cobalt; C060728:cobalt oxide