Detail publikace

Density Depletion at Solid-Liquid Interfaces: a Neutron Reflectivity Study

Maccarini, M, Steitz, R., Himmelmaus, F., Fick, M., Tatur, S., Wolff, M., Grunze, M., Janeček, J., Netz, R.R.

Originální název

Density Depletion at Solid-Liquid Interfaces: a Neutron Reflectivity Study

Typ

článek v časopise - ostatní, Jost

Jazyk

angličtina

Originální abstrakt

Neutron reflectivity experiments conducted on self-assembled monolayers (SAMs) against polar (water) and nonpolar (organic) liquid phases reveal further evidence for a density reduction at hydrophobic-hydrophilic interfaces. The density depletion is found at the interface between hydrophobic dodecanethiol (C12) and hexadecanethiol (C16) SAMs and water and also between hydrophilic SAMs (C12/C11OH) and nonpolar fluids. The results show that the density deficit of a fluid in the boundary layer is not unique to aqueous solid-liquid interfaces but is more general and correlated with the affinity of the liquid to the solid surface. In water the variation of pH has only minor influence, while different electrolytes taken from the Hofmeister series seem to increase the depletion. On hydrophobic SAMs an increase in density depletion with temperature was observed, in agreement with Monte Carlo simulations performed on corresponding model systems. The increase in the water density depletion layer is governed by two effects: the surface energy difference between water and the substrate and the chemical potential of the aqueous phase.

Klíčová slova

SELF-ASSEMBLED MONOLAYERS; UNITED-ATOM DESCRIPTION; SURFACE FREE-ENERGY; HYDROPHOBIC SURFACES; WATER-STRUCTURE; TRANSFERABLE POTENTIALS; ACTIVITY-COEFFICIENTS; COMPUTER-SIMULATION; PHASE-EQUILIBRIA; MONTE-CARLO

Autoři

Maccarini, M, Steitz, R., Himmelmaus, F., Fick, M., Tatur, S., Wolff, M., Grunze, M., Janeček, J., Netz, R.R.

Rok RIV

2007

Vydáno

16. 1. 2007

Nakladatel

ACS

Místo

Washington DC USA

ISSN

0743-7463

Periodikum

Langmuir

Ročník

23

Číslo

2

Stát

Spojené státy americké

Strany od

598

Strany do

608

Strany počet

11

BibTex

@article{BUT44263,
  author="Jiří {Janeček}",
  title="Density Depletion at Solid-Liquid Interfaces: a Neutron Reflectivity Study",
  journal="Langmuir",
  year="2007",
  volume="23",
  number="2",
  pages="598--608",
  issn="0743-7463"
}