News Column

Findings on Science Discussed by A. Gambardella and Co-Researchers

May 23, 2014

By a News Reporter-Staff News Editor at Science Letter -- Researchers detail new data in Science. According to news reporting out of Bologna, Italy, by NewsRx editors, research stated, "Nanoparticles (NPs) embedded in a conductive or insulating matrix play a key role in memristors and in flash memory devices. However, the role of proximity to the interface of isolated NPs has never been directly observed nor fully understood."

Our news journalists obtained a quote from the research, "Here we show that a reversible local switching in tunnel conductivity can be achieved by applying an appropriate voltage pulse using the tip of a scanning tunnelling microscope on NPs embedded in a TiO2 matrix. The resistive switching occurs in the TiO2 matrix in correlation to the NPs that are in proximity of the surface and it is spatially confined to the single NP size. The tunnel conductivity is increased by more than one order of magnitude. The results are rationalized by a model that include the charge of NPs that work as a nano floating gate inducing local band bending that facilitates charge tunnelling and by the formation and redistribution of oxygen vacancies that concentrate in proximity of the charged NPs."

According to the news editors, the research concluded: "Our study demonstrates the switching in tunnel conductivity in single NP and provides useful information for the understanding mechanism or resistive switching."

For more information on this research see: Tunnel conductivity switching in a single nanoparticle-based nano floating gate memory. Scientific Reports, 2014;4():4196. (Nature Publishing Group -; Scientific Reports -

Our news journalists report that additional information may be obtained by contacting A. Gambardella, Consiglio Nazionale delle Ricerche-Istituto per lo studio dei Materiali Nanostrutturati (CNR- ISMN), via P Gobetti 101, 40129 Bologna, Italy. Additional authors for this research include M. Prezioso and M. Cavallini (see also Science).

Keywords for this news article include: Italy, Europe, Bologna, Science.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC

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Source: Science Letter

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