Al doped CdZnTe film was prepared by radio frequency magnetron sputtering with aluminium induced crystallisation. Structural and electric properties of Al doped CdZnTe film were studied. Al doped CdZnTe film has a preferred [111] orientation with uniform pebble-like grain structure, and the leakage current is 2?3610 28 A. Current conduction mechanism in Al doped CdZnTe film has been investigated and analysed. Space charge limited current emission is found to be the dominant mechanism in Al doped CdZnTe film, which was associated with trapping process of Cd vacancies.

Magnesium and its alloys have shown great potential as promising biodegradable implantation materials. However, rapid biodegradation has limited them to clinical applications. To overcome this disadvantage, a Ca/P coating was formed on AZ31B magnesium alloy by micro-arc oxidation (MAO) in three different electrolytes with and without hydroxyapatite (HA). The surface properties were determined by scanning electron microscope (SEM), X-ray diffraction (XRD), and micro-hardness tester. Immersion tests, potentiodynamic polarization, and electrochemical impedance spectroscopy (EIS) tests were employed to evaluate the corrosion behavior of MAO coatings on AZ31B magnesium alloy in simulated body fluid (SBF). The results revealed that the pore size and the micro-hardness would be changed by the different electrolytes. The electrochemical corrosion tests show that the sample prepared in the electrolyte containing 4 g/L edetate calcium disodium (C 10 H 12 N 2 O 8 CaNa 2 Á 2H 2 O, EDTA-Ca), 1.5 g/L sodium hexametaphosphate (NaPO 3 ) 6 , 2 g/L sodium hydroxide (NaOH), and 15 g/L sodium metaaluminate (NaAlO 2 ) with 1.5 g/L HA has the smallest corrosion current density and the largest electrochemical impedance.