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Morphology Control of CdSe Submicrostructures with High Hierarchy in Solution
Author(s) -
Li Benxia,
Jing Meng,
Rong Guoxin,
Xu Yang,
Xie Yi
Publication year - 2006
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200600412
Subject(s) - chemistry , ammonia , aqueous solution , morphology (biology) , phase (matter) , chemical engineering , rod , nanotechnology , organic chemistry , alternative medicine , materials science , pathology , engineering , biology , medicine , genetics
A series of CdSe submicrostructures, including rods, fringy structures, and fasciculate tubes with high hierarchy, have been selectively prepared by a facile one‐step solution‐based strategy without using any organic surfactants, simply by changing the feeding quantity of aqueous ammonia (25 % NH 3 ). The growth mechanism based on kinetic control is discussed for the selective formation of the CdSe submicrostructures with special morphologies. In the present reaction system, ammonia plays a dual role: providing an alkaline medium for the formation of Se 2– and acting as a coordinating agent for cadmium cations in either the solution or the solid phase. The feeding quantity of aqueous ammonia greatly influences the rate of formation of the Se 2– anion, and thus determines the final morphology of CdSe crystals. Compared with previous methods of preparing CdSe structures, this concise and novel one‐step route has special advantages, suggesting a new path for convenient synthesis of CdSe materials with novel morphology. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)