Nano Archive

Preparation and wettability of Zn-Al layered double hydroxide film directly grown on highly porous anodic alumina oxide template

Yang, Feng and Xie, Bo Yu and Sun, Jing Zhi and Jin, Jia Ke and Wang, Mang (2008) Preparation and wettability of Zn-Al layered double hydroxide film directly grown on highly porous anodic alumina oxide template. Materials Letters, 62 (8-9). 1302 - 1304.

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Official URL: http://www.sciencedirect.com/science/article/B6TX9...

Abstract

Zinc–aluminum layered double hydroxide (Zn–Al LDH) thin films were prepared by direct precipitation on the surface of porous anodic alumina oxide (AAO) template. The Zn–Al LDH was assigned to Zn6All2(OH)16CO3·nH2O according to the XRD and EDX data. The nano-pores provided channels and the nano-sized wall-edges for supplying Al3+and highly active reaction sites, thereby the Zn–Al LDH films can be grown more efficiently on porous AAO membrane than those on flat bulk alumina oxide surface. The water contact angle (CA) of the as-prepared Zn–Al LDH films was measured to be 122°, indicating a hydrophobic surface, but after calcination at 600 °C for 2 h, the water CA became 65°, suggesting a hydrophilic surface. Comparative analyses of the surface morphological characteristics and elements with respect to the as-prepared and calcined films implied a thermal induced reconstruction of the Zn–Al LDH structure, which was ascribed to the changes of surface wettability.

Item Type:Article
Uncontrolled Keywords:Layered double hydroxide; Thin films; Surfaces; Wettability
Subjects:Material Science > Nanofabrication processes and tools
Material Science > Nanostructured materials
ID Code:6666
Deposited By:SPI
Deposited On:10 Feb 2010 09:10
Last Modified:10 Feb 2010 09:10

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