Determination of chemisorbed metals on planar fused-silica surfaces using thermal lens spectrometryстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Thermal lens spectrometry was used to determine the surface concentrations of metals on planar fused-silica surfaces modified with the use of vanadium(V) oxochloride, tin(IV) tetrachloride, and titanium(IV) oxochloride after complexation reactions with 4-(2-pyridylazo)resorcinol and 2-thiazolylazopyrocatechol from aqueous solutions. The surface concentrations of vanadium and titanium found from thermal lens experiments (8 x 10(-11) and 6 x 10(-10) mol/cm(2), respectively) correlate well with those theoretically calculated based on monolayer and bilayer approximations for metal-containing groups, respectively. The coverage uniformity and the concentration of a chemisorbed substance on a glass surface were evaluated.