Doping of Fullerene-Like MoS2 Nanoparticles with Minute Amounts of Niobium

Rita Rosentsveig, Lena Yadgarov, Yishay (Isai) Feldman, Sana Shilstein, Ronit Popovitz-Biro, Bojana Visic, Anastasiya Sedova, Sidney R. Cohen, Yuanyuan Li, Anatoly I. Frenkel, Reshef Tenne

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

Inorganic fullerene-like closed-cage nanoparticles of MoS2 and WS2 (IF-MoS2; IF-WS2), are synthesized in substantial amounts and their properties are widely studied. Their superior tribological properties led to large scale commercial applications as solid lubricants in numerous products and technologies. Doping of these nanoparticles can be used to tune their physical properties. In the current work, niobium (Nb) doping of the nanoparticles is accomplished to an unprecedented low level (≤0.1 at%), which allows controlling the work function and the band gap. The Nb contributes a positive charge, which partially compensates the negative surface charge induced by the intrinsic defects (sulfur vacancies). The energy diagram and position of the Fermi level on the nanoparticles surface is determined by Kelvin probe microscopy and optical measurements. Some potential applications of these nanoparticles are briefly discussed.

Original languageEnglish
Article number1700165
JournalParticle and Particle Systems Characterization
Volume35
Issue number3
DOIs
StatePublished - Mar 2018
Externally publishedYes

Keywords

  • doping
  • fullerene-like
  • inorganic nanotubes
  • nanoparticles

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