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Gregory Leitus

Weizmann Institue of Science, Israel

Title: Magnetic characterization of the phase transformations during synthesis of the FeWO4 nanoparticles using WS2 nanotubess

Biography

Biography: Gregory Leitus

Abstract

With the aim to orienting WS2 nanotubes in molten polymer phases by application of a magnetic field, a new synthetic strategy was used to decorate the surface of WS2 nanotubes with FeWO4 nanoparticles. Nanoparticles FeWO4 were obtained by depositing amorphous iron oxide film onto surface of the WS2 nanotubes with subsequent high temperature annealing. Some different phases are forming during the process of phase transformations and they definitely manifest themselves by their different magnetic properties. The nanotubes could be oriented by moderate magnetic field (0.3 T) in low viscosity fluids like ethanol.

Recent Publications

  1. Levi R, Bitton O, Leitus G, Tenne R, Joselevich E, (2013) Field-effect transistors based on WS2 nanotubes with high current-carrying capacity, Nano Lett., 13:3736–3741.
  2. Tsverin Y, Popovitz-Biro R, Feldman Y, R. Tenne R, Komarneni M, Chakradhar Z, Sand A, Burghaus U, (2012) Synthesis and characterization of WS2 nanotube supported cobalt catalyst for hydrodesulfurization, Mater. Res. Bull., 47:1653–1660.
  3. Zak A, Ecker L.S, Efrati R, Drangai L, Fleischer N, Tenne R, (2011) Large-scale Synthesis of WS2 Multiwall Nanotubes and their Dispersion, an Update, Sensors & Transducers, 12:1-3.
  4. Yadgarov L, Choi C.L, Sedova A, Cohen A, Rosentsveig R, Bar-Elli O, Oron D, Dai H, Tenne R, (2014) Dependence of the absorption and optical surface plasmon scattering of MoS2 nanoparticles on aspect ratio, size, and media. ACS Nano, 8: pp. 3575–3583.
  5. Yadgarov L, Rosentsveig R, Leitus G, Albu-Yaron A, Moshkovich A, Perfilyev V, Vasic R, Frenkel A.I, Enyashin A.N, Seifert G, Rapoport L, Tenne R, (2012) Controlled Doping of MS2 (M=W, Mo) Nanotubes and Fullerene-like Nanoparticles, Angew. Chem. Int. Ed, 51: 1148 –1151.
  6. Singh G, Chan H, Udayabhaskararao T, Gelman E, Peddis D,  Baskin A,  Leitus G,  Kr´al P, Klajn R, (2015) Magnetic field-induced self-assembly of iron oxide nanocubes, Faraday Discuss., 181: 403–421.