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      Structure and nanotribology of thermally deposited gold nanoparticles on graphite

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      Author
      Cihan, Ebru
      Özoğul, Alper
      Baykara, Mehmet Z.
      Date
      2015
      Source Title
      Applied Surface Science
      Print ISSN
      0169-4332
      Publisher
      Elsevier
      Volume
      354
      Pages
      429 - 436
      Language
      English
      Type
      Conference Paper
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      Abstract
      We present experiments involving the structural and frictional characterization of gold nanoparticles (AuNP) thermally deposited on highly oriented pyrolytic graphite (HOPG). The effect of thermal deposition amount, as well as post-deposition annealing on the morphology and distribution of gold on HOPG is studied via scanning electron microscopy (SEM) measurements, while transmission electron microscopy (TEM) is utilized to confirm the crystalline character of the nanoparticles. Lateral force measurements conducted via atomic force microscopy (AFM) under ambient conditions are employed to investigate the nanotribological properties of the gold nanoparticles as a function of normal load. Finally, the increase in lateral force experienced at the edges of the nanoparticles is studied as a function of normal load, as well as nanoparticle height. As a whole, our results constitute a comprehensive structural and frictional characterization of the AuNP/HOPG material system, forming the basis for nanotribology experiments involving the lateral manipulation of thermally deposited AuNPs on HOPG via AFM under ambient conditions.
      Keywords
      Atomic force microscopy
      Friction
      Friction force microscopy
      Nanoparticle
      Nanotribology
      Permalink
      http://hdl.handle.net/11693/28341
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.apsusc.2015.04.099
      Collections
      • Department of Mechanical Engineering 274
      • Institute of Materials Science and Nanotechnology (UNAM) 1841
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