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Synthesis and Crystallization of Monodisperse Spherical Colloids of Amorphous Selenium
Author(s) -
Jeong U.,
Xia Y.
Publication year - 2005
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200400498
Subject(s) - dispersity , materials science , ethylene glycol , hydrazine (antidepressant) , amorphous solid , crystallization , colloid , selenium , chemical engineering , molar ratio , crystallography , organic chemistry , polymer chemistry , chromatography , metallurgy , catalysis , chemistry , engineering
Monodisperse amorphous‐selenium spherical colloids (see Figure) have been synthesized in large quantities by reducing selenious acid with hydrazine in ethylene glycol. The diameters of these colloids could be controlled in the range of 90–420 nm by adjusting the molar ratio between selenious acid and hydrazine. The as‐obtained colloids could be readily crystallized into long‐range‐ordered three‐dimensional lattices with well‐defined Bragg‐diffraction peaks.