RT Journal Article
T1 Size effects on water adsorbed on hydrophobic probes at the nanometric scale
A1 Gordillo, M.C.
A1 Calero, C.
A1 Martí, J.
K1 Hydrophobic probes
AB Molecular dynamics simulations of liquid water at ambient conditions, adsorbed at the external walls of (n,n) single-walled armchair carbon nanotubes have been performed for n = 5, 9, 12. The comparison with the case of water adsorbed on graphene has also been included. The analysis of Helmholtz free energies reveals qualitatively different ranges of thermodynamical stability, eventually starting at a given threshold surface density. We observed that, in the framework of the force field considered here, water does not wet graphene nor (12,12) tubes, but it can coat thinner tubes such as (9,9) and (5,5), which indicates that the width of the carbon nanotube plays a role on wetting. On the other hand, density profiles, orientational distributions of water, and hydrogen-bond populations indicate significant changes of structure of water for the different surfaces. Further, we computed self-diffusion of water and spectral densities of water and carbon molecules, which again revealed different qualitative behavior of interfacial water depending on the size of the nanotube. The crossover size corresponds to tube diameters of around 1 nm.
PB American Physical Society
SN 0021-9606
YR 2013
FD 2013
LK http://hdl.handle.net/10433/890
UL http://hdl.handle.net/10433/890
LA en
NO The Journal of Chemical Physics, 2013;138(21):214702
NO Universidad Pablo de Olavide. Departamento de Sistemas Físicos, Químicos y Naturales
DS RIO
RD May 9, 2026