TY  - JOUR
AU  - Yang, C.
AU  - Tartaglino, U.
AU  - Persson, B. N. J.
TI  - Nanodroplets on rough hydrophilic and hydrophobic surfaces
JO  - The European physical journal / E
VL  - 25
SN  - 1292-8941
CY  - Berlin
PB  - Springer
M1  - PreJuSER-2771
SP  - 139 - 152
PY  - 2008
N1  - Record converted from VDB: 12.11.2012
AB  - We present results of Molecular Dynamics (MD) calculations on the behavior of liquid nanodroplets on rough hydrophobic and hydrophilic solid surfaces. On hydrophobic surfaces, the contact angle for nanodroplets depends strongly on the root-mean-square roughness amplitude, but it is nearly independent of the fractal dimension of the surface. Since increasing the fractal dimension increases the short-wavelength roughness, while the long-wavelength roughness is almost unchanged, we conclude that for hydrophobic interactions the short-wavelength (atomistic) roughness is not very important. We show that the nanodroplet is in a Cassie-like state. For rough hydrophobic surfaces, there is no contact angle hysteresis due to strong thermal fluctuations, which occur at the liquid-solid interface on the nanoscale. On hydrophilic surfaces, however, there is strong contact angle hysteresis due to higher energy barrier. These findings may be very important for the development of artificially biomimetic superhydrophobic surfaces.
KW  - Biomimetics
KW  - Biophysics: methods
KW  - Computer Simulation
KW  - Equipment Design
KW  - Fractals
KW  - Models, Statistical
KW  - Models, Theoretical
KW  - Nanoparticles: chemistry
KW  - Nanotechnology: methods
KW  - Probability
KW  - Surface Properties
KW  - Wettability
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:18311474
UR  - <Go to ISI:>//WOS:000254406200003
DO  - DOI:10.1140/epje/i2007-10271-7
UR  - https://juser.fz-juelich.de/record/2771
ER  -