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Title: Atomistic simulation of frictional anisotropy on quasicrystal approximant surfaces

Journal Article · · Physical Review B
 [1];  [1];  [2];  [3];  [3];  [3]
  1. Univ. of California Merced, Merced, CA (United States). Dept. of Mechanical Engineering
  2. Ames Lab. and Iowa State Univ., Ames, IA (United States). Dept. of Chemistry and Materials Science and Engineering
  3. University of South Florida, Tampa, FL (United States). Dept. of Physics

J. Y. Park et al. [Science 309, 1354 (2005)] have reported eight times greater atomic-scale friction in the periodic than in the quasiperiodic direction on the twofold face of a decagonal Al-Ni-Co quasicrystal. Here we present results of molecular-dynamics simulations intended to elucidate mechanisms behind this giant frictional anisotropy. Simulations of a bare atomic-force-microscope tip on several model substrates and under a variety of conditions failed to reproduce experimental results. On the other hand, including the experimental passivation of the tip with chains of hexadecane thiol, we reproduce qualitatively the experimental anisotropy in friction, finding evidence for entrainment of the organic chains in surface furrows parallel to the periodic direction.

Research Organization:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
Grant/Contract Number:
AC02-07CH11358; CHE 1531590; CMMI-1362565
OSTI ID:
1326826
Alternate ID(s):
OSTI ID: 1259347
Report Number(s):
IS-J-9046; PRBMDO
Journal Information:
Physical Review B, Vol. 93, Issue 23; ISSN 2469-9950
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 4 works
Citation information provided by
Web of Science

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Cited By (2)

Frictional Anisotropy of Al, Pt, and Pd Nanoparticles on a Graphene Substrate journal September 2019
Dodecagonal quasicrystal silicene: preparation, mechanical property, and friction behaviour journal January 2020

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