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Growth of ZnO Films with Controlled Morphology by Aqueous Solution Method
Author(s) -
Liu Xiaoxin,
Jin Zhengguo,
Bu Shaojing,
Zhao Juan,
Liu Zhifeng
Publication year - 2006
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2005.00881.x
Subject(s) - transmission electron microscopy , scanning electron microscope , materials science , aqueous solution , chemical engineering , adsorption , morphology (biology) , zinc , ionic bonding , layer (electronics) , ionic strength , nanotechnology , chemistry , ion , composite material , organic chemistry , metallurgy , biology , engineering , genetics
A novel method based on utilizing varied ionic strength and specific adsorption was developed to prepare c ‐oriented zinc oxide (ZnO) films with controlled morphology in aqueous solution. Structure and morphology of the films were investigated by using X‐ray diffraction, scanning electron microscopy, field emission scanning electron microscopy, and high‐resolution transmission electron microscopy methods. A layer‐by‐layer growth manner of ZnO rod crystals was observed. The diameter of the ZnO rods can be controlled through the incorporation of the cost‐effective strong electrolyte NaCl. The reason for the variation of ZnO‐film morphology is that the enhanced ionic strength because of the addition of NaCl promotes not only the related reactants' concentration but also the specific adsorption of organic groups. Furthermore, acetyleacetone used as an assistant can play an important role in specific adsorption, leading to the formation of pyramid crystals through mild secondary growth.