Now showing items 1-10 of 10

    • The effect of gadolinium doping on the structural, magnetic and photoluminescence properties of electrospun bismuth ferrite nanofibers 

      George Philip G.; Senthamizhan, A.; Srinivasan Natarajan, T.; Chandrasekaran G.; Annal Therese H. (Elsevier Ltd, 2015)
      Gadolinium (Gd) doped Bismuth ferrite (BFO) nanofibers (Bi1-xGdxFeO3 (x=0.0, 0.05, 0.10, 0.15 and 0.20)) were synthesized via electrospinning. Scanning Electron Microscope (SEM) analysis showed that the diameter of the ...
    • Effects of silicon and germanium adsorbed on graphene 

      Aktürk, E.; Ataca, C.; Çıracı, Salim (A I P Publishing LLC, 2010)
      Based on the first-principles plane wave calculations, we studied the adsorption of Si and Geon graphene. We found that these atoms are bound to graphene at the bridge site with a significant binding energy, while many ...
    • Electronic and magnetic properties of zinc blende half-metal superlattices 

      Fong, C. Y.; Qian, M. C.; Pask, J. E.; Yang, L. H.; Dag, S. (A I P Publishing LLC, 2004)
      Zinc blende half-metallic compounds such as CrAs, with large magnetic moments and high Curie temperatures, are promising materials for spintronic applications. We explore layered materials, consisting of alternating ...
    • Energetics and Electronic Structures of Individual Atoms Adsorbed on Carbon Nanotubes 

      Durgun, Engin; Dag, S.; Çıracı, Salim; Gülseren, O. (American Chemical Society, 2004)
      The adsorption of individual atoms on the semiconducting and metallic single-walled carbon nanotubes (SWNT) has been investigated by using the first principles pseudopotential plane wave method within density functional ...
    • Half-metallic silicon nanowires: First-principles calculations 

      Durgun, Engin; Çakır, D.; Akman, N.; Çıracı, Salim (American Physical Society, 2007)
      From first-principles calculations, we predict that specific transition metal (TM) atom-adsorbed silicon nanowires have a half-metallic ground state. They are insulators for one spin direction, but show metallic properties ...
    • Highly monodisperse low-magnetization magnetite nanocubes as simultaneous T1–T2 MRI contrast agents 

      Sharma, V. K.; Alipour, A.; Soran-Erdem, Z.; Aykut, Z. G.; Demir, Hilmi Volkan (Royal Society of Chemistry, 2015)
      We report the first study of highly monodisperse and crystalline iron oxide nanocubes with sub-nm controlled size distribution (9.7 ± 0.5 nm in size) that achieve simultaneous contrast enhancement in both T<inf>1</inf>- ...
    • Interaction of adatoms and molecules with single-layer arsenene phases 

      Ersan, F.; Aktürk, E.; Çıracı, Salim (American Chemical Society, 2016-06)
      Recent studies have shown that arsenic can form single-layer phases in buckled honeycomb as well as symmetric washboard structures, named as arsenene. These structures are stable even in freestanding form and are nonmagnetic ...
    • Magnetization of graphane by dehydrogenation 

      Şahin, H.; Ataca, C.; Çıracı, Salim (AIP Publishing, 2009)
      Using first principles calculations, we show that each hydrogen vacancy created at graphane surface results in a local unpaired spin. For domains of hydrogen vacancies the situation is, however, complex and depends on the ...
    • Oscillatory exchange coupling in magnetic molecules 

      Sevincli, H.; Senger, R. T.; Durgun, Engin; Çıracı, Salim (IOP Publishing, 2007)
      Recently, first-principles calculations based on the spin-dependent density functional theory (DFT) have revealed that the magnetic ground state of a finite linear carbon chain capped by two transition metal (TM) atoms ...
    • Spintronic properties of zigzag-edged triangular graphene flakes 

      Şahin, H.; Senger, R. T.; Çıracı, Salim (AIP Publishing LLC, 2010)
      We investigate quantum transport properties of triangular graphene flakes with zigzag edges by using first principles calculations. Triangular graphene flakes have large magnetic moments which vary with the number of ...