I just found out about a technology, touchscreens with Silver Nanowires, from Cambrios. Does anybody has any idea what is the science behind it?
I can understand that by making a foam, you allow light to pass. but, I don't know how many percent of the surface is covered with nanowires, so that they look invisible. I think even if only 10 percent of surface area is covered with silver nanowires, there should be some considerable reflection. But, their films look completely visible. Is there anything wrong with my intuition. Can you explain me?
Yes, it is possible to produce highly conductive, still highly transparent (90% for example) using very long metal nanowires. In microscopic view, there are several nanowires which are overlapped in the contact area and can form high electrical conductivity through percolation network. Moreover, the transparency could be highly enhanced by using very long and thin nanowires which make them almost invisible in macroscopic scale. Check our recent work for further information:
https://www.researchgate.net/publication/263393150_AgNi_CoreShell_Nanowire_Network_for_Robust_Transparent_Electrodes_Against_Oxidation_and_Sulfurization
Article Ag@Ni Core–Shell Nanowire Network for Robust Transparent Ele...
If you could send me the link of the product, I maybe able to give you some detailed information.
Morteza, its here : http://www.cambrios.com/
I want to know the physics behind the size effect that induces invisibility.
As I mentioned, the electrodes in this touchscreen are made of very low density (few layered nanowire structure) nanowire network. Therefore, the thin films is almost made of air with sparse conductive networks in the nanowire junctions providing electrical conduction. If we deposit such a thin film on a highly transparent poleymer, we could achieved a flexible, conductive and transparent conductors for display applications.
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