title: Inorganic fullerene-like tungsten disulfide nanocoating for friction reduction of nickel-titanium alloys.
abstract: OBJECTIVE
  To fabricate a friction-reducing coating onto different nickel-titanium (NiTi) substrates using inorganic fullerene-like tungsten disulfide (IF-WS(2)) nanoparticles and to estimate in vitro friction reducing extent of the coating.
  
  
  METHODS
  Different NiTi substrates were coated with cobalt and IF-WS(2) nanoparticles film by the electrodeposition procedure. Coating composition analyses was made by scanning-electron microscopy, energy dispersive x-ray spectroscopy, x-ray powder diffractometry and x-ray photoelectron spectroscopy. Friction evaluation was carried out using standard tribological tests and an Instron system.
  
  
  RESULTS
  Stable and well-adhered cobalt + IF-WS(2) coating of the NiTi substrates was obtained. Friction tests presented up to 66% reduction of the friction coefficient.
  
  
  CONCLUSIONS
  NiTi alloy is widely used for many medical appliances; hence, this unique friction-reducing coating could be implemented to provide better manipulation and lower piercing rates.
authors: Department of Materials & Interfaces, Weizmann Institute, Rehovot 76100, Israel.
authors: Gili R
authors: GR
authors: Samorodnitzky-Naveh
authors: Meir
authors: M
authors: Redlich
authors: Lev
authors: L
authors: Rapoport
authors: Yishay
authors: Y
authors: Feldman
authors: Reshef
authors: R
authors: Tenne
mesh_terms: D037741:Fullerenes / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology; D053770:Nanowires / Q000737:chemistry* / Q000648:ultrastructure; D009532:Nickel / Q000737:chemistry*; D056951:Photoelectron Spectroscopy; D013052:Spectrometry, X-Ray Emission; D014025:Titanium / Q000737:chemistry*; D014414:Tungsten / Q000737:chemistry*
chemical_list: D037741:Fullerenes; C040654:titanium nickelide; D009532:Nickel; D014025:Titanium; D014414:Tungsten