Electrochemical impedance spectroscopy and gravimetric methods were carried out to analyze water uptake of thin polyurethane films separately filled with either hydrophobic or hydrophilic nano-silica. Correspondingly the impedance spectra and gravimetric data were interpreted in terms of movement of water within the coating and/or to the coating/metal interface. Although the obtained results fr...

In this review we present a unified approach for single cell dielectric spectroscopy. Impedance spectroscopy and dielectrophoretic cell sorting, current microtechnologies applied in electrical analysis of single cells are discussed based on their closely related physical principles. In addition, examples of microfluidic devices will be presented: a microfabricated flow cytometer for single cell...

A microwave-assisted sol-gel method was used to synthesize (N, Fe)-codoped activated carbon (AC)/TiO2 photocatalyst for enhanced optical absorption in the visible light region. The prepared samples were characterized via X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, Brunauer-Emmett-Teller analysis, ultraviolet-visible...

scanning impedance microscopy (sim) is one of the novel scanning probe microscopy (spm) techniques, which has been developed to taking image from sample surface, providing quantitative information with high lateral resolution on the interface capacitance, and investigating the local capacitance–voltage (c–v) behavior of the interface and ac transport properties. the sim is an ordinary afm equip...

The structure, conductivity, melting points and caloric effects of the (Li2CO3?Na2CO3?K2CO3)eut melt/MgO nanopowder heterogeneous system with MgO concentration up to 70 vol. % have been investigated. A wide variety methods (DSC, XRD, BET, high resolution scanning electron microscope, AC impedance method, IR Raman spectroscopy) were used evaluate samples research. It is revealed that at values e...

This article explains a novel synthesis for producing titanium dioxide (TiO2) nanoparticles by sol-gel technique using tetraisopropoxide as source. The synthesized were analyzed many measurements like X-ray diffraction (XRD), HRTEM, absorption UV spectroscopy, FTIR, and ac impedance spectroscopy. peaks used to calculate the crystallite size lattice strain Williamson–Hall method. Crystallite cal...