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Anomalous electron transport with “giant current density” at room temperature observed with nanogranular materials

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dc.contributor.author KOOPS, Hans W. P.
dc.date.accessioned 2019-10-26T09:25:46Z
dc.date.available 2019-10-26T09:25:46Z
dc.date.issued 2013
dc.identifier.citation KOOPS, Hans W. P. Anomalous electron transport with “giant current density” at room temperature observed with nanogranular materials. In: ICNBME-2013. International Conference on Nanotechnologies and Biomedical Engineering. German-Moldovan Workshop on Novel Nanomaterials for Electronic, Photonic and Biomedical Applications: proc. of the 2th intern. conf., April 18-20, 2013. Chişinău, 2013, pp. 39-42. ISBN 978-9975-62-343-8. en_US
dc.identifier.isbn 978-9975-62-343-8
dc.identifier.uri http://repository.utm.md/handle/5014/5370
dc.description.abstract Focused electron beam induced deposition is a novel bottom up nano-structurization technology. An electron beam of high power density is used to generate nano- structures with dimensions > 20 nm, but being composed from amorphous or nanogranular materials with crystals of 2 to 5 nm diameter embedded in a Fullerene matrix. Those compounds are generated in general by secondary or low energy electrons in layers of inorganic, organic, organometallic compounds absorbed to the sample. Those are converted into nanogranular materials by the electron beam following chemical and physical laws, as given by “Mother Nature”. Metals and amorphous mixtures of chemical compounds from metals are normal resistors, which can carry a current density J < 250kA/cm². Nanogranular composites like Au/C or Pt/C with metal nanocrystals embedded in a Fullerene matrix have hopping conduction with 0-dimensional Eigen-value characteristics and show ‘anomalous electron transport’ and can carry “Giant Current Densities” with values from > 1 MA/cm² to 0.1 GA/cm² without destruction of the materials. However the area connecting the nanogranular material with a metal with a 3-dimensional electron gas needs to be designed, that the flowing current is reduced to the current density values which the 3-D metal can support without segregation. The basis for a theoretical explanation of the phenomenon can be geometry quantization for Coulomb blockade, of electron surface orbitals around the nanocrystals, hopping conduction, and the limitation of the density of states for phonons in geometry confined non percolated granular materials with strong difference in mass and orientation. Several applications in electronics, signal generators, light sources, detectors, and solar energy harvesting are suggested. en_US
dc.language.iso en en_US
dc.publisher Tehnica UTM en_US
dc.rights Attribution-NonCommercial-NoDerivs 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/3.0/us/ *
dc.subject nanogranular materials en_US
dc.title Anomalous electron transport with “giant current density” at room temperature observed with nanogranular materials en_US
dc.type Article en_US


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