Antibacterial silver-layers deposited by sputtering As metallic silver-nanostructures exhibit a high surface-to-volume-ratio, the concentration of microbiological effective silver ions at the nanoparticle surface, generated by atmospheric oxygen and humidity from the environment, is significant higher than for macroscopic, respective μ- structures. Applying nanosilver to textiles can improve the smell properties as shown in Figure 1, where a nonwoven was equipped with different loadings of nanosilver. The fact that a moderate concentration of approx. 300 ppm silver is sufficient in order to reduce the bad smell is due to the genuine advantage of the nanotechnology.
Dynamic wetting behaviour of household wipes by fluoroform nanolayers The dynamic wetting behaviour of non-wovens for household wipes can be a critical factor of the cleaning performance. As the wiping process is fast, the relevant time scales are far below one second. For this reason, it is a great challenge to influence the dynamic wetting behaviour within milliseconds. In Figure 3, the water contact angle for different wipes is shown as a function of time. It can be clearly seen, that a successive application of fluoroform nanolayers results in a reduction of the wetting velocity. The wetting behaviour can be influenced very sensitively and within a very small time scale by such layers.
Edited by: Andy
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