Phototribology: Control of Friction by Light
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21230%2F21%3A00351652" target="_blank" >RIV/68407700:21230/21:00351652 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1021/acsami.1c13054" target="_blank" >https://doi.org/10.1021/acsami.1c13054</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/acsami.1c13054" target="_blank" >10.1021/acsami.1c13054</a>
Alternative languages
Result language
angličtina
Original language name
Phototribology: Control of Friction by Light
Original language description
In dry sliding, the coefficient of friction depends on the material pair and contact conditions. If the material and operating conditions remain unchanged, the coefficient of friction is constant. Obviously, we can tune friction by surface treatments, but it is a nonreversible process. Here, we report active control of friction forces on TiO2 thin films under UV light. It is reversible and stable and can be tuned/controlled with the light wavelength. The analysis of atomic force microscopy signals by wavelet spectrograms reveals different mechanisms acting in the darkness and under UV. Ab initio simulations on UV light-exposed TiO2 show a lower atomic orbital overlapping on the surface, which leads to a friction reduction of up to 60%. We suggest that photocontrol of friction is due to the modification of atomic orbital interactions from both surfaces at the sliding interface.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/EF16_026%2F0008396" target="_blank" >EF16_026/0008396: Novel nanostructures for engineering applications enabled by emerging techniques supported by advanced simulations</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
ACS Applied Materials & Interfaces
ISSN
1944-8244
e-ISSN
1944-8252
Volume of the periodical
13
Issue of the periodical within the volume
36
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
43746-43754
UT code for WoS article
000697282300135
EID of the result in the Scopus database
2-s2.0-85115619605