期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 373, 期 -, 页码 27-33出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2011.09.039
关键词
ZnO; Nanoflakes; Stabilization; Polyethylenimine; Electrophoretic deposition; Thin films
资金
- Spanish Science and Innovation Ministry (MCI), Spain [MAT2009-14448-C02-01, MAT2010-16614, IPT-310000-2010-0012, IPT-120000-2010-33]
- CSIC
The parameters that control the stability of ZnO-nanoparticles suspensions and their deposition by electrophoretic deposition were studied, so as to organize the assembly and compaction of nanoparticles. The addition of cationic polyelectrolyte - Polyethylenimine (PEI) - with different molecular weights was investigated, in order to study their effectiveness and the influence of the molecular weight of the organic chain on suspensions dispersion. It was found that PEI with the highest molecular weight provided better dispersion conditions. Cathodic EPD was performed under previously optimized suspensions conditions and over electropolished stainless steel substrates. Experimental results showed that the EPD process in these conditions allows obtaining dense transparent ZnO thin films. Deposition times and intensities were optimized by analyzing the resulting thin films characteristics. Finally, the deposits were characterized by FE-SEM, AFM, and different spectroscopic techniques. (C) 2011 Elsevier Inc. All rights reserved.
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