Publications (2)4.71 Total impact
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Article: The formation of Ti–O tetrahedra and band gap reduction in SiO2 via pulsed ion implantation
Journal of Applied Physics 01/2013; 113(94):7-902. · 2.17 Impact Factor -
Article: Structural ordering in a silica glass matrix under Mn-ion implantation.
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ABSTRACT: Mn(+)-implanted, amorphous SiO(2) samples were synthesized using pulsed-ion implantation without thermal annealing. The crystal and electronic structures have been studied using x-ray diffraction and synchrotron-based soft x-ray absorption and emission spectroscopy at the Si and Mn L(2,3) edges. We find a combination of small MnO clusters and Si crystallites at shallow depths while tetrahedral Mn coordination is found deeper in the host target. Through a combination of techniques, we find that the implantation process simultaneously decreases the long-range order in the near-surface region and increases order deeper in the SiO(2) host. Our results suggest Mn substitution into Si sites at deep levels catalyzes the formation of α-quartz, providing insight into the complex interactions that determine the local structure around the impurities as well as the overall changes to the crystallinity of implanted SiO(2).Journal of Physics Condensed Matter 04/2012; 24(18):185402. · 2.55 Impact Factor
