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Aqueous Synthesis of Y 2 O 2 S:Eu/Silica Core‐Shell Particles
Author(s) -
Chung ChauChyun,
Jean JauHo
Publication year - 2005
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.1551-2916.2005.00290.x
Subject(s) - aqueous solution , polyethylenimine , coating , phosphor , materials science , layer (electronics) , sodium silicate , chemical engineering , bilayer , layer by layer , silicate , cationic polymerization , polymer , polyelectrolyte , chemistry , polymer chemistry , composite material , organic chemistry , membrane , transfection , biochemistry , optoelectronics , engineering , gene
A layer‐by‐layer method is used to coat silica on the red phosphor powders of Y 2 O 2 S:Eu in aqueous solutions. A cationic polymer of polyethylenimine (PEI) is used to form the first‐layer coating, and the precipitating sodium silicate solution, to form negatively charged silica film on the PEI‐coated phosphor powder as the second‐layer coating. Repetition of the above coating process in aqueous solutions, a uniform, multiple silica/PEI bilayer coating on phosphor powder is formed.