Search results for "nanocristalli"
showing 2 items of 2 documents
Location of holes in silicon-rich oxide as memory states
2002
The induced changes of the flatband voltage by the location of holes in a silicon-rich oxide (SRO) film sandwiched between two thin SiO 2 layers [used as gate dielectric in a metal-oxide-semiconductor (MOS) capacitor] can be used as the two states of a memory cell. The principle of operation is based on holes permanently trapped in the SRO layer and reversibly moved up and down, close to the metal and the semiconductor, in order to obtain the two logic states of the memory. The concept has been verified by suitable experiments on MOS structures. The device exhibits an excellent endurance behavior and, due to the low mobility of the holes at low field in the SRO layer, a much longer refresh …
Trattamenti a base di TiO2 nanocristallina ad azione protettiva indiretta fotocatalitica applicati ai beni architettonici
2009
The research is focused on the definition of a diagnostic program to verify a protective product for stone surfaces. The objective is, in particular, to verify the treatments efficacy of nanocrystalline TiO2 (Titania) with indirect photocatalytic protective action, in the form of thin films made through the sol-gel method, and applied to the stone materials of the Monumental Heritage, through a poly-methodological scientific research, that allow to assess the innovative behaviour towards the fundamental principles of conservation and restoration of the architectural-artistic heritage. To define the research’s program have collaborated Department of Geosciences of University of Padova, ISTM-…