Results 251 to 260 of about 302,537 (306)

Ion irradiation effects in silicon nanowires

MRS Proceedings, 2011
ABSTRACTIon irradiation effects in nanowires are of increasing interest due to potential applications of the wires as e.g. current-carrying elements in transistors or as efficient light emitters. Although several experiments have already demonstrated such functionalities, very few theoretical studies on the fundamental mechanisms of ion irradiation ...
Holmström Eero Kristian, Nordlund Kai, Hoilijoki Sanni   +2 more
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Structure and bonding in ion irradiated polystyrene

Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 1990
Abstract In this paper we report the Raman spectra of polystyrene films irradiated with 240 keV Ar+ ions at fluences between 1015 and 4 × 1016 cm−2. The presence of two broad bands ID, and IG at 1380 and 1560 cm−1 clearly indicates that ion bombardment induces a transition from the original molecular solid to hydrogenated amorphous carbon.
FOTI, G, REITANO, Riccardo
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Vibrational spectroscopy of ion-irradiated pentacene

Infrared Physics & Technology, 1994
Abstract In this paper we present a study of the evolution of the IR and Raman spectrum of pentacene before, during and after irradiation with energetic ion beams, demonstrating the complex chemistry induced by incoming ions. The formation of a “new” aromatic network has been evidenced. Dehydrogenation occurs and the evolution towards what we call an
CANNIA R, STRAZZULLA G, COMPAGNINI, Giuseppe Romano, BARATTA GA   +3 more
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Increases in giant magnetoresistance by ion irradiation

Physical Review B, 1994
We have studied the effect of 500-keV Xe[sup +] irradiation on the structure, magnetotransport, and magnetic properties of sputtered Fe/Cr multilayers. Initially, with increasing dosage the giant magnetoresistance (GMR) increases with a concomitant increase in the interfacial roughness as indicated by changes in the low-angle x-ray-diffraction spectra.
, Kelly, , Schuller, , Korenivski, , Rao, , Larsen, , Bottiger, , Gyorgy, , van Dover RB   +7 more
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Tailoring magnetism by light-ion irradiation

Journal of Physics D: Applied Physics, 2004
Owing to their reduced dimensions, the magnetic properties of ultrathin magnetic films and multilayers, e.g. magnetic anisotropies and exchange coupling, often depend strongly on the surface and interface structure. In addition, chemical composition, crystallinity, grain sizes and their distribution govern the magnetic behaviour.
Fassbender, J., Ravelosona, D., Samson, Y.   +2 more
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Ion Irradiation on Phase Change Materials

MRS Proceedings, 2011
ABSTRACTIon irradiation with 130 keV Ge+ or 120 keV Sb+ has modified, by thermal spike effect, the local atomic arrangement in the structure of as-deposited sputtered amorphous GeTe and Ge2Sb2Te5 thin films. The changes in the local order have been analyzed by Raman and EXAFS spectroscopy.
E Rimini, E Carria, A Mio, M Miritello, S Gibilisco, C Bongiorno, G D'Arrigo, C Spinella, F D'Acapito, M Grimaldi   +9 more
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Vibrational spectroscopy of ion-irradiated ices

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2001
In the last 20 years we have studied some effects induced by fast ions (E approximately keV-MeV) impinging on solid materials (mainly ices) with a view to their astrophysical relevance. The main techniques used have been infrared and Raman spectroscopy.
G, Strazzulla, G A, Baratta, M E, Palumbo   +2 more
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Irradiation response of Nd2Zr2O7 under heavy ions irradiation

Journal of the European Ceramic Society, 2018
Abstract This paper studied the irradiation behavior of Nd2Zr2O7 ceramics under 2.0 MeV Xe20+ irradiation to high fluences from 4.08 × 1013 ions/cm2 to 5.28 × 1016 ions/cm2. Phase transformation, from pyrochlore to fluorite and finally to amorphization, have been discovered.
Qi Qing, Xiaoyan Shu, Dadong Shao, Haibin Zhang, Fangting Chi, Xirui Lu   +5 more
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Ion-chain interaction in keV ion-beam-irradiated polystyrene

Applied Physics Letters, 1987
Molecular weight distribution has been measured in monodisperse polystyrene film (MW=9 000 amu) after ion bombardment, in the ion fluence range 1011–1013 ions/cm2. The chosen beams are 100 keV He, 200 keV Ne, and 400 keV Ar. The experimental data have been interpreted in terms of a simple statistical model for cross-links.
CALCAGNO, Lucia, FOTI G, LICCIARDELLO, Antonino, PUGLISI O.   +3 more
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Irradiation Effects in Ices by Energetic Ions

1989
It has been shown that the irradiation of ices leads to “giant” erosion yields, in some specific conditions (1,2). In order to understand the physical processes involved, we have performed direct in-situ measurements of the erosion during irradiation, by means of infrared spectrometry of the ices.
Benit, J., Bibring, J.P., Rocard, F.
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