Hosono Eiji, Fujihara Shinobu, Kimura Toshio, Imai Hiroaki
Department of Applied Chemistry, Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan.
J Colloid Interface Sci. 2004 Apr 15;272(2):391-8. doi: 10.1016/j.jcis.2003.10.005.
Layered basic zinc acetate (LBZA), Zn(5)(OH)(8)(CH(3)COO)(2).2H(2)O, was deposited on glass substrates by a chemical bath deposition (CBD) method using methanolic solutions of zinc acetate dihydrate. The substrates were put into bottles filled with the solutions and sealed up and were kept at 60 degrees C in a drying oven. Immersion time necessary for the deposition of LBZA films was typically more than 28 h. This was a key to inducing heterogeneous nucleation of LBZA through control over a degree of supersaturation in the evolution of a unique, nest-like morphology. Hydration water contained by zinc acetate dihydrate was quantitatively enough to promote hydrolysis of zinc acetate. The LBZA films were transformed into nanocrystalline, porous ZnO films without morphological deformation by heating at 150 degrees C in air. A mechanism of the formation of the nest-like morphology was discussed based on nonaqueous solution reactions, nucleation, and crystal growth during the CBD process.
层状碱式醋酸锌（LBZA），即Zn(5)(OH)(8)(CH(3)COO)(2).2H(2)O，通过化学浴沉积（CBD）法，使用二水合醋酸锌的甲醇溶液，沉积在玻璃基板上。将基板放入装有溶液的瓶子中密封，并在干燥箱中于60摄氏度下保存。LBZA薄膜沉积所需的浸渍时间通常超过28小时。这是通过控制独特的巢状形态演变过程中的过饱和度程度来诱导LBZA异质成核的关键。二水合醋酸锌所含的结晶水在数量上足以促进醋酸锌的水解。通过在空气中150摄氏度加热，LBZA薄膜转变为纳米晶多孔ZnO薄膜，且形态无变形。基于CBD过程中的非水溶液反应、成核和晶体生长，讨论了巢状形态的形成机制。
