Results 211 to 220 of about 1,944,847 (252)

Nanostructuring in semiconductors by swift heavy ions

2007 International Workshop on Physics of Semiconductor Devices, 2007
There have been enormous worldwide research efforts in semiconductor nanostructures in the last decade. The basic motivation behind the study of semiconductor nanostructures is that the quantum-confinement effect in such low dimensional systems allows devices with promising properties to be engineered.
O. P. Sinha, P. C. Srivastava, V. Ganesan   +2 more
openaire   +1 more source

Materials Engineering with Swift Heavy Ions

2011
High energy heavy ions are proving to be important tools in the efforts to modify the properties of materials in a controlled fashion to provide possibility of making them functional for specific applications in planned developments towards futuristic technologies. Presently, research in this field is mostly of exploratory kind.
D. K. Avasthi, G. K. Mehta
openaire   +1 more source

Electronic Sputtering with Swift Heavy Ions

2007
Swift heavy ions of energies where electronic processes dominate the slowing down process in matter induce sputtering mainly by inelastic effects, and not by elastic collision cascades. Given by the high energy input per incident ion, the measurements of sputtering yields include specific problems and require different techniques than for nuclear ...
Walter Assmann, Marcel Toulemonde, Christina Trautmann   +2 more
openaire   +1 more source

Modification of ceramic coatings by swift heavy ions

Surface and Coatings Technology, 2005
Abstract Throughout the last decade, swift heavy ions (SHI) of some MeV/amu kinetic energy have revealed to be an excellent tool for the “nano-modification” of materials. Besides the already existing ion-track technology, which makes use of the structural and property alterations of the material inside the tracks of spatially isolated single-ion ...
Wolfgang Bolse, Thunu Bolse, Christian Dais, Derejee Etissa-Debissa, Ammar Elsanousi, Ando Feyh, Melih Kalafat, Hartmut Paulus   +7 more
openaire   +1 more source

Radiation damage in UO2 by swift heavy ions

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1997
Abstract Specimens of sintered UO2, a high melting point ceramic with the fluorite structure, were irradiated with heavy ions (129Xe, 238U) with different fluences (5 × 1010 to 7 × 1013 ions/cm2) and energies (173 MeV for Xe ions to 2.713 GeV for U ions). The influence of the electronic energy loss on the mechanisms of damage formation was studied in
T. Wiss, Hj. Matzke, C. Trautmann, M. Toulemonde, S. Klaumünzer   +4 more
openaire   +1 more source

Swift Heavy Ion Irradiation on Quasicrystals

MRS Proceedings, 2003
ABSTRACTThe present level of understanding of the effects of irradiation of quasicrystalline targets with swift heavy ions has been reviewed here. The results of systematic deposition of large amount of energy densities (12 keV/nm < (dE/dx)e < 40 keV/nm) in Al-Cu-Fe based system are discussed in terms of resistivity measurements (in-situ ...
openaire   +1 more source

Swift heavy ion induced plastic deformation

Radiation Effects and Defects in Solids, 1993
Abstract Electronic energy loss, which dominates the slowing down of swift heavy ions in solids, leads to atomic rearrangements depending on the nature of the irradiated target. Amorphous materials are subject to structural changes similar to those observed in crystalline materials and undergo anisotropic plastic deformation.
A. Benyagoub, S. Klaumünzer
openaire   +1 more source

Swift heavy ion irradiation of SrTiO

2008
The irradiation of SrTiO3 single crystals with swift heavy ions leads to modifications of the surface. The details of the morphology of these modifications depend strongly on the angle of incidence and can be characterized by atomic force microscopy. At glancing angles, discontinuous chains of nanosized hillocks appear on the surface.
Akcöltekin, Ender, Akcöltekin, Sevilay, Osmani, Orkhan, Duvenbeck, Andreas, Lebius, Henning, Schleberger, Marika   +5 more
openaire   +1 more source

Swift heavy ion irradiation of diamond powder

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 2012
Abstract Sub-micrometer sized diamond powder was irradiated with 1.4 GeV uranium ions at fluences of 5 × 1012, 1 × 1013 and 8 × 1013 ions/cm2. The resulting structure of the irradiated diamond powder was investigated by synchrotron X-ray diffraction (XRD), Raman scattering and transmission electron microscopy.
Fuxiang Zhang, Maik Lang, Jiaming Zhang, Rodney C. Ewing   +3 more
openaire   +1 more source

Modifications of polycarbonate induced by swift heavy ions

Materials Science and Engineering: A, 2007
Abstract The effects of 80 MeV O6+ ions irradiation on polycarbonate (makrofol-DE) have been studied by different characterization techniques, viz. Fourier transform IR spectroscopy, Vickers’ microhardness tester, LCR meter, thermogravimetric analysis and differential scanning calorimetry.
N.L. Singh, Anjum Qureshi, F. Singh, D.K. Avasthi   +3 more
openaire   +1 more source