Optical measurements of electrophoretic suspension kinetics

Siderov, V . and Yordanov, R. and Yordanova, I. and Boyadjiev, Stefan Ivanov and Vala, M. (2013) Optical measurements of electrophoretic suspension kinetics. BULGARIAN CHEMICAL COMMUNICATIONS, 45. pp. 181-184. ISSN 0861-9808

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Abstract

Electrophoretic deposition (EPD) was originally used for formation of coatings, e. g. in the automotive industry. Recently EPD is successfully utili zed for thin film preparation with an app lication in the optics and electronics. This paper investigates the process of the suspension formation and aggregation by ultraviolet and visible spectroscopy (UV- VIS) spectroscopy and Dynamic Light Scattering (DLS) methods. The suspensions were formed by a precipitation of solution of poly[2-methoxy-5-(3 ′ ,7 ′ -dimethyloctyloxy)-1,4-phenylenevinylene] in toluene using acetonitrile as a precipitator. It could be concluded that the progressive suspension particle growth observed by DLS affects regularly the first derivative of the UV-VIS spectra. By a comparison of the results obtained by both methods it could be seen that UV-VIS spectroscopy combined with the spline method could be successfully used for an estimation of electrophoretic suspensions.

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