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Silver nanoparticles (Ag NPs) were quick synthesized by electrochemical method combined with heat treatment using silver electrodes and trisodiumcitrate (TSC) as reducing agent. This method is highly productive, with simple equipment, which is easily deployed on an industrial scale. The size of the Ag NPs is controlled through the amperage and the concentration of TSC. The effect of the synthesis' conditions on optical properties of Ag NPs was surveyed. The Ag NPs were used to fabricate the Ag NPs-coated nonwoven fabrics. The bactericidal testing showed that Ag NPs-coated nonwoven fabrics were able to kill over 80% of E. coli and 96.9% of B. subtilis bacteria. These results can be considered as a new choice to prevent the spread of diseases caused by bacteria and viruses, thereby contributing to the protection of human health.

Hydrogen adsorption in WO 3 thin films is known to cause the change of color of the films. Due to its high sensitivity, chemical stability as well as biocompatibility, the WO 3 offers itself as an efficient hydrogen sensor, especially for detection of hydrogen in humid environments. In this paper we report the preparation and characterization of WO 3 electrochoromic thin films prepared on ITO substrates by thermal evaporation synthesis. These films show significant decreases in transparency from over 92% to as low as 2% at an applied bias of ¹0.7 V. Structure as well as the effect of annealing temperature on the structure and properties of the films are also studied. The changes of optical band gap and the role of hydrogen in coloration process are also discussed.

This paper presents how parallel computing could apply into genetic algorithm for adaptive array antenna. There are some constrains in this algorithm that prevent parallel computing to reduce the benefits in time cost. Therefore, instead of using normal model of parallel computing, we apply parallel genetic algorithm for adaptive array antenna to have an interesting result which benefits in the deep NULL.