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Synthesis of Segmented Silica Rods by Regulation of the Growth Temperature
Author(s) -
Datskos Panos,
Sharma Jaswinder
Publication year - 2014
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201308140
Subject(s) - rod , emulsion , incubation , materials science , colloid , atmospheric temperature range , chemical engineering , chemistry , thermodynamics , organic chemistry , biochemistry , physics , alternative medicine , medicine , pathology , engineering
The control of the diameter of colloidal structures is of fundamental interest and practical importance. We synthesized segmented silica rods by regulating the reaction temperature while the rods were growing. With higher growth temperatures, the segment diameter became smaller. Longer incubation times gave longer segments at the same temperature. Similarly, high temperature for the same incubation time gave longer segments. It appears that the correlation between temperature and diameter results from the relation between temperature and the size of the emulsion droplet, that is, the higher the temperature, the smaller the emulsion droplet.