• Article  

      Crystal/glass phase change in KSb5S8 studied through thermal analysis techniques 

      Chrissafis, K.; Kyratsi, Theodora; Paraskevopoulos, K. M.; Kanatzidis, M. G. (2004)
      The reversible crystal-glass and glass-crystal transitions discovered in KSb5S8 were studied in detail with nonisothermal scanning calorimetry techniques. When cooled, molten KSb5S8 becomes a metastable glass, which can ...
    • Conference Object  

      Direct observation of microscopic inhomogeneities in high-Tc superconductors using energy-dispersive diffraction of synchrotron-produced xrays 

      Skelton, Earl F.; Qadri, Syen B.; Osofsky, Michael S.; Drews, A. R.; Broussard, P. R.; Hu, J. Z.; Finger, L. W.; Vanderah, Terrell A.; Kaiser, D.; Peng, J. L.; Anlage, Steven M.; Greene, Richard L.; Giapintzakis, John (Affiliation: Naval Research Lab., Washington, DC,, USA, United StatesCorrespondence Address: Skelton, Earl F.Naval Research Lab., Washington, DC,, USAUnited States, 1995)
      Evidence of micron-sized structural inhomogeneities in several high transition temperature (T c) superconductors is presented. By illuminating samples with high energy, highly collimated x rays produced on a synchrotron ...
    • Article  

      Disorder-induced vortex phase transition in untwinned YBa2Cu3O7-δ crystal 

      Giller, D.; Giapintzakis, John; Shaulov, A.; Yeshurun, Y. (2000)
      Local magnetic measurements in an untwinned YBa2Cu3O7-δ crystal as a function of temperature, field and time reveal anomalies occurring along the same line BSS(T) in the field-temperature plane. We identify BSS(T) as a ...
    • Article  

      Hall effect in an untwinned single crystal of YBa2Cu3O7-x 

      Rice, J. P.; Giapintzakis, John; Ginsberg, D. M.; Mochel, J. M. (1991)
      The Hall coefficient RH for untwinned single-crystal YBa2Cu3O7-x has been measured for the first time. The crystal was produced by a technique not requiring the application of stress. The measurements are made above the ...
    • Article  

      Normal and defective perylene substitution sites in alkane crystals 

      Leontidis, Epameinondas; Heinz, H.; Palewska, K.; Wallenborn, E. -U; Suter, U. W. (2001)
      The substitution nature of perylene in polycrystalline solid alkane matrices was examined. Low temperature excitation-emission matrix spectroscopy was used to determine substitution sites in alkane matrices from hexane to ...
    • Article  

      Perchlorophenalenyl radical 

      Koutentis, Panayiotis Andreas; Chen, Y. Z.; Cao, Yun Zhen; Best, T. P.; Itkis, M. E.; Beer, L.; Oakley, R. T.; Cordes, A. W.; Brock, C. P.; Haddon, R. C. (2001)
      We report the preparation and solid-state characterization of the perchlorophenalenyl radical (1). The radical is initially obtained as a yellow-green solid by reduction of the perchlorophenalenium salt (12+). This solid ...
    • Article  

      Supramolecular features in the engineering of 3d metal complexes with phenyl-substituted imidazoles as ligands: the case of copper(ii)1 

      Kounavi, Konstantina A.; Kitos, Alexandros A.; Moushi, Eleni E.; Manos, Manolis J.; Papatriantafyllopoulou, Constantina; Tasiopoulos, Anastasios J.; Perlepes, Spyros P.; Nastopoulos, Vassilios (2015)
    • Article  

      Thin liquid crystal film for corrosion sensing 

      Kossivas, F.; Kyprianou, Andreas (2008)
      The anchoring energy of Liquid Crystals (LCs) is influenced by several parameters. Many scientists have exploited LCs anchoring in order to develop several LC based optical sensors. This paper proposes and proves a new ...