Chemical and physical origins of friction on surfaces with atomic steps

Zhe Chen, Arash Khajeh, Ashlie Martini, Seong H. Kim

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Friction occurs through a complex set of processes that act together to resist relative motion. However, despite this complexity, friction is typically described using a simple phenomenological expression that relates normal and lateral forces via a coefficient, the friction coefficient. This one parameter encompasses multiple, sometimes competing, effects. To better understand the origins of friction, here, we study a chemically and topographically well-defined interface between silica and graphite with a single-layer graphene step edge. We identify the separate contributions of physical and chemical processes to friction and show that a single friction coefficient can be separated into two terms corresponding to these effects. The findings provide insight into the chemical and topographic origins of friction and suggest means of tuning surfaces by leveraging competing frictional processes.

Original languageEnglish (US)
Article numbereaaw0513
JournalScience Advances
Volume5
Issue number8
DOIs
StatePublished - Aug 9 2019

Fingerprint

friction
coefficient of friction
graphene
graphite
tuning
silicon dioxide
coefficients

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)
  • General

Cite this

Chen, Zhe ; Khajeh, Arash ; Martini, Ashlie ; Kim, Seong H. / Chemical and physical origins of friction on surfaces with atomic steps. In: Science Advances. 2019 ; Vol. 5, No. 8.
@article{bfbcda9521404a729d9ea6d7c1419f77,
title = "Chemical and physical origins of friction on surfaces with atomic steps",
abstract = "Friction occurs through a complex set of processes that act together to resist relative motion. However, despite this complexity, friction is typically described using a simple phenomenological expression that relates normal and lateral forces via a coefficient, the friction coefficient. This one parameter encompasses multiple, sometimes competing, effects. To better understand the origins of friction, here, we study a chemically and topographically well-defined interface between silica and graphite with a single-layer graphene step edge. We identify the separate contributions of physical and chemical processes to friction and show that a single friction coefficient can be separated into two terms corresponding to these effects. The findings provide insight into the chemical and topographic origins of friction and suggest means of tuning surfaces by leveraging competing frictional processes.",
author = "Zhe Chen and Arash Khajeh and Ashlie Martini and Kim, {Seong H.}",
year = "2019",
month = "8",
day = "9",
doi = "10.1126/sciadv.aaw0513",
language = "English (US)",
volume = "5",
journal = "Indian Journal of Pure and Applied Physics",
issn = "0019-5596",
publisher = "National Institute of Science Communication and Information Resources (NISCAIR)",
number = "8",

}

Chemical and physical origins of friction on surfaces with atomic steps. / Chen, Zhe; Khajeh, Arash; Martini, Ashlie; Kim, Seong H.

In: Science Advances, Vol. 5, No. 8, eaaw0513, 09.08.2019.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Chemical and physical origins of friction on surfaces with atomic steps

AU - Chen, Zhe

AU - Khajeh, Arash

AU - Martini, Ashlie

AU - Kim, Seong H.

PY - 2019/8/9

Y1 - 2019/8/9

N2 - Friction occurs through a complex set of processes that act together to resist relative motion. However, despite this complexity, friction is typically described using a simple phenomenological expression that relates normal and lateral forces via a coefficient, the friction coefficient. This one parameter encompasses multiple, sometimes competing, effects. To better understand the origins of friction, here, we study a chemically and topographically well-defined interface between silica and graphite with a single-layer graphene step edge. We identify the separate contributions of physical and chemical processes to friction and show that a single friction coefficient can be separated into two terms corresponding to these effects. The findings provide insight into the chemical and topographic origins of friction and suggest means of tuning surfaces by leveraging competing frictional processes.

AB - Friction occurs through a complex set of processes that act together to resist relative motion. However, despite this complexity, friction is typically described using a simple phenomenological expression that relates normal and lateral forces via a coefficient, the friction coefficient. This one parameter encompasses multiple, sometimes competing, effects. To better understand the origins of friction, here, we study a chemically and topographically well-defined interface between silica and graphite with a single-layer graphene step edge. We identify the separate contributions of physical and chemical processes to friction and show that a single friction coefficient can be separated into two terms corresponding to these effects. The findings provide insight into the chemical and topographic origins of friction and suggest means of tuning surfaces by leveraging competing frictional processes.

UR - http://www.scopus.com/inward/record.url?scp=85070996583&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85070996583&partnerID=8YFLogxK

U2 - 10.1126/sciadv.aaw0513

DO - 10.1126/sciadv.aaw0513

M3 - Article

C2 - 31448329

AN - SCOPUS:85070996583

VL - 5

JO - Indian Journal of Pure and Applied Physics

JF - Indian Journal of Pure and Applied Physics

SN - 0019-5596

IS - 8

M1 - eaaw0513

ER -