Hierarchically nanostructured rutile arrays: acid vapor oxidation growth and tunable morphologies.
A general acid vapor oxidation (AVO) strategy has been developed to grow highly oriented hierarchically structured rutile TiO(2) nanoarrays with tunable morphologies from titanium thin films. This is a simple one-pot synthesis approach involving the reaction of a titanium surface with the vapor generated from a hydrochloric acid solution in a Teflon lined autoclave. To the best of our knowledge, this is the first successful attempt to grow ordered tree-like titania nanoarrays. A possible formation mechanism for the interesting architectures has been proposed based on series of time-dependent experiments. By adjusting the initial HCl concentration, films of different rutile structures including nanotrees, dendritic nanobundles, and nanorods can be selectively obtained. Subsequently, the surface morphologies and wettability can be readily tuned.
Yang
Xianfeng
X
MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen (Zhongshan) University, Guangzhou, 510275, PR China.
Zhuang
Jianle
J
Li
Xiuyan
X
Chen
Dihu
D
Ouyang
Gangfeng
G
Mao
Zhongquan
Z
Han
Yaxiong
Y
He
Zhenhui
Z
Liang
Chaolun
C
Wu
Mingmei
M
Yu
Jimmy C
JC
D003460:Crystallization / Q000379:methods*; D005740:Gases / Q000737:chemistry; D006851:Hydrochloric Acid / Q000737:chemistry*; D046911:Macromolecular Substances / Q000737:chemistry; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D036103:Nanotechnology / Q000379:methods*; D010316:Particle Size; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*
D005740:Gases; D046911:Macromolecular Substances; C009495:titanium dioxide; D014025:Titanium; D006851:Hydrochloric Acid