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Layer‐by‐layer Multilayer Films Self‐assembled from a Rare‐earth‐containing Poly‐oxometalate Na 9 [Eu(W 5 O 18 ) 2 ] and Poly (allylamine hydrochloride) and Their Photoluminescent Properties
Author(s) -
Wang YongHui,
Wang XinLong,
Hu ChangWen,
Wang EnBo,
Shi ChunShan
Publication year - 2002
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.20020200408
Subject(s) - allylamine , chemistry , bilayer , layer by layer , ellipsometry , scanning electron microscope , layer (electronics) , chemical engineering , aqueous solution , photoluminescence , polyoxometalate , polyelectrolyte , analytical chemistry (journal) , thin film , nanotechnology , materials science , polymer , organic chemistry , membrane , composite material , biochemistry , optoelectronics , engineering , catalysis
Ultrathin multilayer films of a rare‐earth‐containing polyoxometalate Na 9 [Eu(W 5 O 18 ) 2 ] (EW) and poly(allylamine hydrochloride) (PAH) have been prepared by layer‐by‐layer self‐assembly from dilute aqueous solutions. The fabrication process of the EW/PAH multilayer films was followed by UV‐vis spectroscopy and ellipsometry, which show that the deposition process is linear and highly reproducible from layer to layer. An average EW/PAH bilayer thickness of ca . 2.1 nm was determined by ellipsometry. In addition, the scanning electron microscopy (SEM) image of the EW/PAH film indicates that the film surface is relatively uniform and smooth. The photoluminescent properties of these films were also investigated by fluorescence spectroscopy.