Navegação Ciências Exatas e da Terra por Autor "Giulian, Raquel"
Resultados 1-9 de 9
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Ion implantation in β-Ga2O3 : Physics and technology
(2021) [Artigo de periódico]Gallium oxide, and in particular its thermodynamically stable β-Ga2O3 phase, is within the most exciting materials in research and technology nowadays due to its unique properties. The very high breakdown electric field ... -
Ion irradiation-induced foams in antimonide binary alloys : a combination of small energy bandgap with giant surface-to-bulk ratio
(2020) [Artigo de periódico]This is a short review about the ion irradiation-induced foams in antimonide films. III–V semiconductors like InSb and GaSb can be transformed into solid foams with nanometric dimensions upon irradiation with swift heavy ... -
Latent ion tracks in amorphous silicon
(2013) [Artigo de periódico]We present experimental evidence for the formation of ion tracks in amorphous Si induced by swift heavy-ion irradiation. An underlying core-shell structure consistent with remnants of a high-density liquid structure was ... -
Lift-off protocols for thin films for use in EXAFS experiments
(2013) [Artigo de periódico]Lift-off protocols for thin films for improved extended X-ray absorption fine structure (EXAFS) measurements are presented. Using wet chemical etching of the substrate or the interlayer between the thin film and the ... -
Nano-porosity in GaSb induced by swift heavy ion irradiation
(2014) [Artigo de periódico]Nano-porous structures form in GaSb after ion irradiation with 185 MeV Au ions. The porous layer formation is governed by the dominant electronic energy loss at this energy regime. The porous layer morphology differs ... -
Nanoscale density fluctuations in swift heavy ion irradiated amorphous SiO2
(2011) [Artigo de periódico]We report on the observation of nanoscale density fluctuations in 2 μm thick amorphous SiO2 layers irradiated with 185 MeV Au ions. At high fluences, in excess of approximately 5 1012 ions=cm², where the surface is completely ... -
Orientation and morphology of Pt nanoparticles in γ-alumina processed via ion implantation and thermal annealing
(2020) [Artigo de periódico]Structure and chemistry of metal/metal-oxide interfaces are critical for many catalytic processes and sensing. Pristine interfaces of Pt and γ -Al2O3 were fabricated using high-energy ion implantation and thermal processing. ... -
Rotatable anisotropy driven training effects in exchange biased Co/CoO films
(2014) [Artigo de periódico]The training effect for exchange bias in field-cooled Co/CoO bilayers films is investigated. Previous experiments on the same system have shown that, starting from the ascending branch of the first hysteresis loop, coherent ... -
Tracks and voids in amorphous Ge induced by swift heavy-ion irradiation
(2013) [Artigo de periódico]Ion tracks formed in amorphous Ge by swift heavy-ion irradiation have been identified with experiment and modeling to yield unambiguous evidence of tracks in an amorphous semiconductor. Their underdense core and overdense ...
