 
Summary: PROOF COPY 502144JCP
PROOF
COPY
502144JCP
Curvature dependent surface tension from a simulation of a cavity
in a LennardJones liquid close to coexistence
M. P. Moody and P. Attard
Ian Wark Research Institute, University of South Australia, Mawson Lakes, South Australia 5095
Received 17 July 2001; accepted 4 September 2001
Monte Carlo simulations have been used to calculate the surface tension of a planar liquidvapor
interface of a LennardJones fluid using a new cylindrical truncation correction procedure. A bubble
was mimicked by simulating a LennardJones liquid close to coexistence containing a single
immobile hardsphere cavity. From the density profile of this system the curvature dependent
surface tension has been estimated via calculation of the Helmholtz free energy of the system and
separately using a large cavity contact density expansion. Evidence is presented that the Tolman
length becomes increasingly negative as the critical temperature is approached and possibly changes
sign. © 2001 American Institute of Physics. DOI: 10.1063/1.1413514
I. INTRODUCTION
The dependence of surface tension on radius of curva
ture is fundamental to the study of the properties of small
