Tom J. Tate

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The use of ion-implantation to encourage osseointegration has been investigated using an in vitro model cell culture system and surface analysis. Polished titanium discs were implanted with calcium, potassium and argon ions. The adhesion of bone-derived cells was measured using radioactively labeled cells and the morphology examined using scanning electron(More)
Magnesium diboride, MgB2, has a relatively high superconducting transition temperature, placing it between the families of low- and high-temperature (copper oxide based) superconductors. Supercurrent flow in MgB2 is unhindered by grain boundaries, making it potentially attractive for technological applications in the temperature range 20-30 K. But in the(More)
A 545 nm thick low-k dielectric film was implanted at room temperature with 50 keV 63Cuþ to a dose of 1:0 10 atoms/ cm. The film is a SiOx-based material and doped with about 8 at.% of flourine. Analyses by secondary-ion mass spectrometry show that Cu is fast diffuser in the low-k film, and after the RTA anneals Cu has redistributed within the film and some(More)
A relatively high critical temperature, Tc, approaching 40 K, places the recently-discovered [1] superconductor magnesium diboride (MgB2) intermediate between the families of lowand copper-oxide-based high-temperature superconductors (HTS). Supercurrent flow in MgB2 is unhindered by grain boundaries [2, 3], unlike the HTS materials. Thus, long(More)
The luminescence of amorphous silicon layers either implanted with Er or co-implanted with Er and O has been studied by photoluminescence (PL) and cathodoluminescence (CL) in the scanning electron microscope. Annealing in nitrogen causes the formation of oxide species and Er-Si complexes or precipitates as well as spectral changes in the visible and(More)
The luminescence properties of erbium oxide grown on crystalline and amorphous silicon substrates were studied by means of photoand cathodoluminescence techniques. Differences in the luminescence spectra for samples grown on the two types of substrates used are explained in terms of the different types of erbium centers formed by taking into account the(More)
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