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Synthesis of Cd(OH) 2 with Doughnut Microstructure and Its Controlled Growth Mechanism
Author(s) -
PENG Yin,
LIU Zhengyin,
YE Feng,
WEI Xianwen
Publication year - 2009
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200990047
Subject(s) - chemistry , microstructure , polyacrylamide , polymer , crystal growth , crystal (programming language) , chemical engineering , nanocrystal , hexagonal crystal system , nanotechnology , crystallography , polymer chemistry , organic chemistry , materials science , computer science , engineering , programming language
Doughnut‐like Cd(OH) 2 microstructure was obtained by a facile solution‐based method using polymer polyacrylamide (PAM) as a crystal growth modifier. Hexagonal flake‐like Cd(OH) 2 is the building‐block to assemble doughnut‐like microstructures. The block concaves from one side when PAM is present in the synthesis system. However, nano‐size Cd(OH) 2 doughnuts with a hole in the middle part were formed if carboxyl‐functionalized polyacrylamide (PAM‐COOH) was used as a crystal growth modifier. A possible mechanism for the Cd(OH) 2 microstructure formation based on typical oriented attachment process in the presence of polymer was discussed. Polymer‐directed crystal growth and mediated self‐assembly of nanocrystals may promise synthesis routes for variously ordered inorganic and inorganic‐organic hybrid materials with complex forms and special structures.