Browsing by Author "Giannakopoulos, K."
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Structure and mechanical properties of low temperature magnetron sputtered nanocrystalline (nc-)Ti(N,C)/amorphous diamond like carbon (a-C:H) coatings
Tsotsos, C.; Baker, M. A.; Polychronopoulou, K.; Gibson, P. N.; Giannakopoulos, K.; Polycarpou, A. A.; Böbel, K.; Rebholz, Claus (2010)This paper reports on the structure and mechanical properties of 2μm thick nanocomposite (nc-) Ti(N,C)/amorphous diamond like carbon (a-C:H) coatings deposited on 100Cr6 steel substrates, using low temperature ( 200°C) DC ...
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Article
Synthesis and characterization of Cr-B-N coatings deposited by reactive arc evaporation
Polychronopoulou, K.; Neidhardt, J.; Rebholz, Claus; Baker, M. A.; O'Sullivan, M.; Reiter, A. E.; Gunnaes, A. E.; Giannakopoulos, K.; Mitterer, C. (2008)Nanocomposite Cr-B-N coatings were deposited from CrB0.2 compound targets by reactive arc evaporation using an Ar/N2 discharge at 500 °C and -20 V substrate bias. Elastic recoil detection (ERDA), x-ray photoelectron ...
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Article
Synthesis of nanoporous graphene oxide adsorbents by freeze-drying or microwave radiation: Characterization and hydrogen storage properties
Kostoglou, N.; Tzitzios, V.; Kontos, A. G.; Giannakopoulos, K.; Tampaxis, C.; Papavasiliou, A.; Charalambopoulou, Georgia; Steriotis, T.; Li, Y.; Liao, K.; Polychronopoulou, K.; Mitterer, C.; Rebholz, Claus (2015)In the present work, we synthesized and systematically characterized two novel graphene-based nanomaterials, a chemically reduced graphene oxide (GO) sponge and a microwave-exfoliated GO. Textural properties were determined ...
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Article
Tailoring MgO-based supported Rh catalysts for purification of gas streams from phenol
Polychronopoulou, Kyriaki; Giannakopoulos, K.; Efstathiou, Angelos M. (2012)The present work is focused on the sol-gel synthesis, characterization and catalytic performance evaluation of novel Mg-Ce-Zr-O-based mixed oxides supported Rh catalysts for the purification of H 2-rich gas streams from ...