• Conference Object  

      N-to-p transition on K2Bi8-xSbxSe 13 series 

      Kyratsi, Theodora; Hatzikraniotis, E.; Tsiappos, A.; Paraskevopoulos, K. M.; Kanatzidis, M. G. (Affiliation: Department of Mechanical and Manufacturing Engineering, University of Cyprus, 1678 Nicosia, CyprusAffiliation: Department of Chemistry, Michigan State University, East Lansing, MI 48824, United StatesAffiliation: Department of Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, GreeceCorrespondence Address: Kyratsi, Th.Department of Mechanical and Manufacturing Engineering, University of Cyprus, 1678 Nicosia, Cyprus, 2006)
      β-K2Bi8Se13 and its solid solutions have been found to be interesting for thermoelectric investigations mainly due to their low thermal conductivity and highly anisotropic electrical properties. Solid solution series of ...
    • Article  

      Nanoparticles-enabled low temperature growth of carbon nanofibers and their properties for supercapacitors 

      Andersson, R.; Saleem, A. M.; Savva, I.; Krasia-Christoforou, T.; Enoksson, P.; Desmaris, V. (2018)
    • Article  

      Nanoporous activated carbon cloth as a versatile material for hydrogen adsorption, selective gas separation and electrochemical energy storage 

      Kostoglou, N.; Koczwara, C.; Prehal, C.; Terziyska, V.; Babic, B.; Matovic, B.; Constantinides, G.; Tampaxis, C.; Charalambopoulou, Georgia; Steriotis, T.; Hinder, S.; Baker, M. A.; Polychronopoulou, K.; Doumanidis, C. C.; Paris, O.; Mitterer, C.; Rebholz, Claus (2017)
      The efficient storage of energy combined with a minimum carbon footprint is still considered one of the major challenges towards the transition to a progressive, sustainable and environmental friendly society on a global ...
    • Article  

      Nanoporous spongy graphene: Potential applications for hydrogen adsorption and selective gas separation 

      Kostoglou, Nikolaos; Constantinides, G.; Charalambopoulou, Georgia; Steriotis, Theodore; Polychronopoulou, Kyriaki; Li, Yuanqing; Liao, Kin; Ryzhkov, Vladislav; Mitterer, Christian; Rebholz, Claus (2015)
      In the present work, a nanoporous (pore width 0.7nm) graphene-based sponge-like material with large surface area ( 350m2/g) was synthesized by wet chemical reduction of graphene oxide in combination with freeze-drying. ...
    • Article  

      Nanostructural studies of PVD TiAlB coatings 

      Monclus, M. A.; Baker, M. A.; Rebholz, Claus; Stolojan, V.; Gibson, P. N.; Leyland, A.; Matthews, A. (2006)
      TiAlB coatings with different compositions were deposited by co-sputtering from TiAl and TiB2 targets onto AISI316 stainless steel substrates at a temperature of 170 °C. The stoichiometry and nanostructure have been studied ...
    • Article  

      Nanostructure and doping stimulated phase separation in high-ZT Mg2Si0.55Sn0.4Ge0.05 compounds 

      Polymeris, G. S.; Vlachos, N.; Khan, A. U.; Hatzikraniotis, E.; Lioutas, C. B.; Delimitis, A.; Pavlidou, E.; Paraskevopoulos, K. M.; Kyratsi, Theodora (2015)
      A study was attempted on the structural properties across all relevant length-scales for Mg2(Si,Sn,Ge)-type solid solutions of the formula Mg2Si0.55- ySn0.40Ge0.05(Bi,Sb)y. The study focuses on three families of samples, ...
    • Article  

      Nanostructure, mechanical and tribological properties of reactive magnetron sputtered TiCx coatings 

      Polychronopoulou, K.; Rebholz, Claus; Baker, M. A.; Theodorou, L.; Demas, N. G.; Hinder, S. J.; Polycarpou, A. A.; Doumanidis, C. C.; Böbel, K. (2008)
      This study describes the correlation between microstructure, mechanical and tribological properties of TiCx coatings (with x being in the range of 0–1.4), deposited by reactive magnetron sputtering from a Ti target in ...
    • Article  

      Nanostructure, mechanical and tribological properties of reactive magnetron sputtered TiCx coatings 

      Polychronopoulou, K.; Rebholz, Claus; Baker, M. A.; Theodorou, L.; Demas, N. G.; Hinder, S. J.; Polycarpou, A. A.; Doumanidis, C. C.; Böbel, K. (2008)
      This study describes the correlation between microstructure, mechanical and tribological properties of TiCx coatings (with x being in the range of 0-1.4), deposited by reactive magnetron sputtering from a Ti target in ...
    • Article  

      The nanostructure, wear and corrosion performance of arc-evaporated CrBxNy nanocomposite coatings 

      Polychronopoulou, K.; Baker, M. A.; Rebholz, Claus; Neidhardt, J.; O'Sullivan, M.; Reiter, A. E.; Kanakis, K.; Leyland, A.; Matthews, A.; Mitterer, C. (2009)
      The composition, nanostructure, tribological and corrosion behaviour of reactive arc evaporated CrBxNy coatings have been studied and compared to CrN. The CrBxNy coatings were deposited on a commercial Oerlikon Balzers RCS ...
    • Article  

      Natural convection in ventilated building facades using LES 

      Grigoriadis, D. G. E. (2018)
      Understanding the buoyancy-driven flow in gas gap enclosures can provide significant physical insight into a variety of technological applications ranging from cooling of electronic equipment to energy related components ...
    • Article  

      Near critical behavior in the two-dimensional spin-gap system SrCu2(BO3)2 

      Zorko, A.; Arčon, D.; Lappas, A.; Giapintzakis, John (2002)
      The temperature dependence of the powdered X-band ESR spectra has been measured in a two-dimensional spin-gap system SrCu2(BO3)2 in the temperature range between 5 and 300 K. The spectra are composed of two overlapping ...
    • Article  

      Near-monodisperse sodium polymethacrylates: Characterization by linear salt gradient anion-exchange chromatography 

      Freydank, A.; Krasia-Christoforou, T.; Tiddy, G. J. T.; Patrickios, C. S. (2000)
      A family of six near-monodisperse homopolymers of sodium methacrylate (Mn = 1100, 3200, 5500, 7200, 14100, and 21000) is characterized by linear salt gradient anion-exchange chromatography. Although the retention times ...
    • Article  

      Negative giant longitudinal magnetoresistance in NiMnSb InSb: Interface effect 

      Gardelis, S.; Androulakis, J.; Viskadourakis, Z.; Papadopoulou, E. L.; Giapintzakis, John; Rai, S.; Lodha, G. S.; Roy, S. B. (2006)
      We report on the electrical and magnetotransport properties of the contact formed between n -type degenerate InSb (100) substrates and polycrystalline NiMnSb thin films grown using pulsed laser deposition. Negative giant ...
    • Article  

      The nitridation of ZnO nanowires 

      Zervos, Matthew; Karipi, C.; Othonos, A. (2012)
      ZnO nanowires (NWs) with diameters of 50 to 250 nm and lengths of several micrometres have been grown by reactive vapour transport via the reaction of Zn with oxygen on 1 nm Au/Si(001) at 550°C under an inert flow of Ar. ...
    • Article  

      Non-equilibrium microscale thermomechanical modeling of bimetallic particulate fractal structures during ball milling fabrication 

      Aureli, M.; Doumanidis, C. C.; Gunduz, I. E.; Hussien, A. G. S.; Liao, Y.; Jaffar, S. M.; Rebholz, Claus; Doumanidis, C. C. (2017)
      Nanostructured bimetallic reactive multilayers can be conveniently produced by ball milling of elemental powders. This research explores the non-equilibrium microscale conductive thermal transport in ball-milled particulate ...
    • Conference Object  

      Non-uniform finite segment representation and reduction of a cantilever beam model 

      Louca, Loucas S. (Dime University of Genoa, 2016)
      The cantilever beam is a component widely used in numerous engineering systems with its geometric and material properties varying depending on the application. Calculating the dynamic behavior of a cantilever beam is a ...
    • Article  

      Nonlinear Distortion and Attenuation of Intense Acoustic Waves in Lossy Media Obeying a Frequency Power Law 

      S, S. Kashcheeva; Sapozhnikov, Oleg; Khokhlova, V.; AVERKIOU, MICHALAKIS A.; Crum, Lawrence (2000)
      Nonlinear propagation of a periodic wave and a single pulse with a shack front through a lossy medium is studied theoretically. The medium is characterized by the frequency dependence of the attenuation coefficient obeying ...
    • Article  

      Nonlinear distortion of short pulses radiated by plane and focused circular pistons 

      Averkiou, Michalakis A.; Hamilton, Mark F. (1997)
      Detailed measurements of finite-amplitude pulses radiated by plane and focused circular pistons in water are presented. Comparisons of time waveforms and frequency spectra, both on and off axis, are made with numerical ...
    • Article  

      Nonlinear imaging 

      Burns, P. N.; Simpson, D. Hope; Averkiou, Michalakis A. (2000)
    • Article  

      Nonlinear pulsed ultrasound beams radiated by rectangular focused diagnostic transducers 

      Khokhlova, V. A.; Ponomarev, A. E.; AVERKIOU, MICHALAKIS A.; Crum, L. A. (2006)
      A numerical model for simulating nonlinear pulsed beams radiated by rectangular focused transducers, which are typical of diagnostic ultrasound systems, is presented. The model is based on a KZK-type nonlinear evolution ...