Journal
CHEMPHYSCHEM
Volume 13, Issue 18, Pages 4129-4133Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201200820
Keywords
nonlinearity; oscillations; reciprocating motion; interfaces; thin films
Funding
- Gloval COE Program [23111715]
- Grants-in-Aid for Scientific Research [22540391] Funding Source: KAKEN
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The mode change of a simple autonomous motor depending on the nature of a monolayer on water is investigated. A camphor disk is floated on a molecular layer of N-stearoyl-p-nitroaniline (C(18)ANA), which gives a surface-pressure (pi)-area per molecule (A) isotherm with a local maximum and a local minimum. The nature of the camphor motion changes depending on A, and in particular, reciprocating motion is observed at a lower A while cutting out its own trajectory of motion. The characteristic motion of a camphor disk depending on A is discussed in relation to the pi-A isotherm of C(18)ANA and the influence of the molecular interaction between molecules on the driving force of motion.
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