Structure and spatial distribution of Ge nanocrystals subjected to fast neutron irradiation - Condensed Matter > Mesoscale and Nanoscale PhysicsReport as inadecuate




Structure and spatial distribution of Ge nanocrystals subjected to fast neutron irradiation - Condensed Matter > Mesoscale and Nanoscale Physics - Download this document for free, or read online. Document in PDF available to download.

Abstract: The influence of fast neutron irradiation on the structure and spatialdistribution of Ge nanocrystals NC embedded in an amorphous SiO2 matrix hasbeen studied. The investigation was conducted by means of laser RamanScattering RS, High Resolution Transmission Electron Microscopy HR-TEM andX-ray photoelectron spectroscopy XPS. The irradiation of NC-Ge samples by ahigh dose of fast neutrons lead to a partial destruction of the nanocrystals.Full reconstruction of crystallinity was achieved after annealing the radiationdamage at 800 deg. C, which resulted in full restoration of the RS spectrum.HR-TEM images show, however, that the spatial distributions of NC-Ge changed asa result of irradiation and annealing. A sharp decrease in NC distributiontowards the SiO2 surface has been observed. This was accompanied by XPSdetection of Ge oxides and elemental Ge within both the surface and subsurfaceregion.



Author: S. Levy, I. Shlimak, D. H. Dressler, J. Grinblat, Y.Gofer, T. Lu, A. N. Ionov

Source: https://arxiv.org/







Related documents