Electronic Resource
s.l. ; Stafa-Zurich, Switzerland
Solid state phenomena
Vol. 124-126 (June 2007), p. 527-530
ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
This paper reviews novel techniques developed in our laboratory to deposit ceramicthin films from aqueous solutions. All the techniques are based on the heterogeneous nucleationand growth phenomenon; ceramic precipitates are prone to be formed preferentially onsubstrate/solution interfaces when the rate of the formation of the precipitates is appropriatelycontrolled. In “oxidative soak coating” method, metal ions with a lower valence state areoxidized in homogeneous solutions to those with a higher valence state; thereby coatings of SnO2,MnO2, CeO2, Co3O4 and Fe3O4 have been deposited. In “ligand decomposition” method, ligandsof an indium peroxo- complex are decomposed to promote spontaneous hydrolysis of the indiumion; thereby In2O3 coating has been deposited. In “enzyme-assisted precipitation” method,precipitant of metal ions is supplied by urease immobilized on a substrate to promote localdeposition of ceramics on the substrate, by which hydroxyapatite coating has been rapidlydeposited. The control of the rate of the precipitation reactions is the most important parameter.Some properties of the resultant coatings are also presented
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.124-126.527.pdf
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