1,721,112 research outputs found
Recent progress in silicene growth on inert substrates
No full textIn this review, recent studies on silicene formation on inert surfaces like highly oriented pyrolytic graphite and graphene will be reported, i) providing an efficient and simple way to produce high quality and large-scale material on an inert and well-ordered surface, ii) opening a path towards controlled intercalation of silicon atoms through graphene layers and formation of silicene nanosheets for future applications in nanotechnology
X-ray absorption at Ge L3-edge as a tool toinvestigate Ge/Si(001) interfaces and heterostructures
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Exchange mechanisms at Ge/Si(100) interface from a multiple-scattering analysis of the Ge L3absorption edge
No full textWide band photodetectors based on Bi2Se3 Topological Insulator
No full textBi2Se3/n−Si heterojunctions have been successfully obtained by depositing BirSes films with thickness in the range 10 nm−100 nm on pre-patterned ndoped Si substrates by vapor solid deposition method. The samples present on/off ratio of the order of 105 and dark current in the range of 10nA. When illuminated with He-Ne radiation through the Bi 2 Se 3 layer, the unbiased detectors show very high linearity, responsivity as high as 60 mA/W and Detectivity in the range of 1011 Jones
Si(1-x)C(x) formation by reaction of Si(111) withacetylene:grwth mode, electronic, structure andluminescence investigation
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Studies of the adsorption of tetraphenylporphyrin molecules on graphite
No full textCombined scanning tunneling microscopy, reflection electron energy loss spectroscopy and X-ray photoelectron studies have been performed in situ under ultra high vacuum condition, on tetraphenylporphyrin molecules (H2TPP) vacuum sublimated on highly oriented pyrolitic graphite. The experimental studies were performed at room temperature, as a function of the amount of deposited porphyrins. The propensity of H2TPP to self-assembly on the graphite surface could be detected after a threshold of deposited material. In this case tetraphenylporphyrin molecules arranged according to a quasi-hexagonal lattice separated from their nearest neighbours by a minimum distance of about 1 nm. The formation of an additional incomplete layer, at a slightly higher coverage, was also detected where the quasi-hexagonal symmetry is retained. Finally, subsequent tetraphenylporphyrins depositions gave molecular aggregates randomly distributed on the graphite surface with subsequent loss of order. (c) 2007 Elsevier B.V. All rights reserved
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