Hilner, Emelie; Zakharov, Alexei A.; Schulte, Karina; Kratzer, Peter; Andersen, Jesper N.; Lundgren, Edvin; Mikkelsen, Anders:
Ordering of the nanoscale step morphology as a mechanism for droplet self-propulsion
2009
In: Nano Letters, Band 9 (2009), S. 2710 - 2714
Artikel/Aufsatz in Zeitschrift2009Physik
Titel:
Ordering of the nanoscale step morphology as a mechanism for droplet self-propulsion
Autor(in):
Hilner, Emelie; Zakharov, Alexei A.; Schulte, Karina; Kratzer, PeterLSF; Andersen, Jesper N.; Lundgren, Edvin; Mikkelsen, Anders
Erscheinungsjahr
2009
DOI:
Erschienen in:
Titel:
Nano Letters
in:
Band 9 (2009), S. 2710 - 2714

Abstract:

We establish a new mechanism for self-propelled motion of droplets, in which ordering of the nanoscale step morphology by sublimation beneath the droplets themselves acts to drive them perpendicular and up the surface steps. The mechanism is demonstrated and explored for Ga droplets on GaP(111)B, using several experimental techniques allowing studies of the structure and dynamics from micrometers to the atomic scale. We argue that the simple assumptions underlying the propulsion mechanism make it relevant for a wide variety of materials systems.