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This research was focused on the edge emission of undoped CdS and ZnSe monocrystals. The results of the research showed that the pulse cathodoluminescence spectra at a temperature of 15 K consist of the short-wave and long-wave series of edge emission bands with the equidistant structure. We also investigated the temperature dependence of the edge emission in the interval of 15–80 К and the afterglow...
The structural and optical properties of annealed CdS are studied in this work. The CdS films are deposited on ITO coated glasses by sputtering at different substrate temperatures and subsequently annealed in an O2/N2 ambient. It has been observed from XRD diffraction that the films show a trend of conversion from poly crystalline to amorphous or mixed phases after annealing. The films fabricated...
A flexible substrate electrochemical biosensor was successfully printed on a polyethylene terephthalate (PET) film with silver (Ag) electrodes using silver nanoparticle based ink. The electrochemical impedance spectroscopy (EIS) response of the printed sensor for detecting low concentrations of bio/chemical species revealed a very high sensitivity at pico molar (pM) concentration levels of D-Proline,...
This paper investigates the use of a photoconductive polymer to optically tune a microwave device or antenna. The dielectric properties of a composite (Polymer + Cadmium Sulphide) photoconductive polymer are extracted using microwave reflection measurements on a coplanar waveguide test structure. The material under test was overlaid on an interdigitated capacitor that was fabricated on a transparent...
An impedance based electrochemical biosensor was designed and fabricated for the detection of various chemical and biological species, with glass as substrate material and gold electrodes. A flow cell with inlet and outlet ports for the micro fluidic chamber was designed and fabricated using an acrylic material with a reservoir volume of 78 ??l. The feasibility of the fabricated sensor for detecting...
Cadmium sulphide (CdS) thin films were prepared on glass substrates by chemical bath deposition (CBD) from a bath containing cadmium sulphate, thiourea and ammonium hydroxide. The structural analysis was performed by XRD, AFM and FE-SEM. The deposited CdS thin film was a cubic phase with small nanocrystalline grains. The EDAX analysis showed the Cd to S atomic ratio of 1:0.96. The optical band gap...
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