@article {2614,
	title = {Wall-colloid interaction in nematic solvents: external field effects},
	journal = {Journal of Physics-Condensed Matter},
	volume = {21},
	number = {24},
	year = {2009},
	note = {ISI Document Delivery No.: 453AETimes Cited: 1Cited Reference Count: 21Sokolovska, T. G. Patey, G. N.},
	month = {Jun},
	pages = {5},
	type = {Article},
	abstract = {We propose a molecular theory of colloid-wall interactions in nematic media that predicts a new effective force acting on colloidal particles in the presence of an external field. In contrast to the so-called {\textquoteright}image{\textquoteright} interaction that is always repulsive at long distances, the force identified here can be attractive or repulsive, depending on the type of anchoring at the wall and colloidal surfaces. The effective force on a colloidal particle decreases with distance s from the wall as exp(-s/xi), where xi is a magnetic (electric) coherence length. At weak fields the force is proportional to (Sigma/xi)(3) for {\textquoteright}quadrupolar{\textquoteright} colloids and to (Sigma/xi)(2) for {\textquoteright}dipoles{\textquoteright}, where Sigma is the colloidal diameter. A brief discussion of recent experiments in the light of our findings is presented.},
	keywords = {FORCES, LIQUID-CRYSTALS, PARTICLES, TOPOLOGICAL DEFECTS},
	isbn = {0953-8984},
	url = {<Go to ISI>://000266581500006},
	author = {Sokolovska, T. G. and Patey, G. N.}
}
@article {2256,
	title = {Bridging the gap between phenomenology and microscopic theory: Asymptotes in nematic colloids},
	journal = {Physical Review E},
	volume = {77},
	number = {4},
	year = {2008},
	note = {ISI Document Delivery No.: 295EDTimes Cited: 3Cited Reference Count: 28Sokolovska, T. G. Sokolovskii, R. O. Patey, G. N.Part 1},
	month = {Apr},
	pages = {10},
	type = {Article},
	abstract = {The Ornstein-Zernike equation is applied to nematic colloids with up-down symmetry to determine how the electrostatic analogy and other phenomenological results appear in molecular theory. In contrast to phenomenological approaches, the molecular theory does not assume particular boundary conditions (anchoring) at colloidal surfaces. For our molecular parameters the resulting anchoring appears to be realistic, neither rigid nor infinitely weak. For this case, the effective force between a colloidal pair at large separation remains essentially constant over the entire region of nematic stability. We show that a simple van der Waals approximation gives a potential of mean force that in some important aspects is similar to the phenomenological results obtained in the limit of weak anchoring; at large separations the potential varies as Sigma(8), where Sigma is the colloidal diameter. In contrast, the more sophisticated mean spherical approximation yields a Sigma(6) dependence consistent with phenomenological calculations employing rigid boundary conditions. We show that taking proper account of the correlation (or magnetic coherence) length xi inherent in the nematic sample is essential in an analysis of the Sigma dependence. At infinite xi the leading Sigma dependence is Sigma(6), but this shifts to Sigma(8) when xi is finite. The correlation length also influences the orientational behavior of the effective interaction. The so-called quadrupole interaction that determines the long-range behavior at infinite xi transforms into a superposition of screened "multipoles" when xi is finite. The basic approach employed in this paper can be readily applied to a broad range of physically interesting systems. These include patterned and nonspherical colloids, colloids trapped at interfaces, and nematic fluids in confined geometries such as droplets.},
	keywords = {ELASTIC-CONSTANTS, FIELD, FORCES, LIQUID-CRYSTALS, PARTICLES, PHASE, STATISTICAL-THEORY, TOPOLOGICAL DEFECTS},
	isbn = {1539-3755},
	url = {<Go to ISI>://000255456900069},
	author = {Sokolovska, T. G. and Sokolovskii, R. O. and Patey, G. N.}
}
@article {1567,
	title = {Colloidal interactions in nematic fluids},
	journal = {Physical Review E},
	volume = {73},
	number = {2},
	year = {2006},
	note = {ISI Document Delivery No.: 017AUTimes Cited: 4Cited Reference Count: 26Part 1},
	month = {Feb},
	pages = {4},
	type = {Article},
	abstract = {Microscopic theory is used to obtain effective interactions between colloidal particles in nematic fluids subjected to an external orienting field. It is shown that the field can dramatically change the effective intercolloidal interactions without altering the symmetry of the director configuration around a single particle. Our calculations suggest that a rich variety of colloidal structures can be promoted by varying the external field.},
	keywords = {FORCES, PHASE, TOPOLOGICAL DEFECTS},
	isbn = {1539-3755},
	url = {<Go to ISI>://000235667300009},
	author = {Sokolovska, T. G. and Sokolovskii, R. O. and Patey, G. N.}
}
@article {1412,
	title = {Nanoscopic liquid bridges between chemically patterned atomistic walls},
	journal = {Journal of Physical Chemistry B},
	volume = {110},
	number = {8},
	year = {2006},
	note = {ISI Document Delivery No.: 020WQTimes Cited: 6Cited Reference Count: 38},
	month = {Mar},
	pages = {3764-3772},
	type = {Article},
	abstract = {A binary liquid mixture, containing the Lennard-Jones molecules A and B, in equilibrium with a bulk liquid reservoir near the point of phase separation, confined between atomistic chemically patterned walls, is studied by grand canonical Monte Carlo simulations. In the bulk, the B-rich phase is stable and the A-rich phase is metastable. The walls bear patches attractive to A; when the walls are close, A-rich liquid bridges condense between the patches. The normal and lateral forces on the walls are measured as a function of the wall separation and of the lateral displacement between the patches on opposite walls. When there are one or two molecular layers in the bridge and the wall lattice constant is close to that of crystalline A, the normal and lateral forces depend strongly on the registry of the wall lattices, varying in an oscillatory manner.},
	keywords = {BEHAVIOR, capillary, CONDENSATION, FILMS, FLUIDS, FORCES, INDUCED PHASE-TRANSITIONS, MOLECULARLY THIN-LAYERS, PORES, SHEAR, STRUCTURED WALLS},
	isbn = {1520-6106},
	url = {<Go to ISI>://000235944300039},
	author = {Hemming, C. J. and Patey, G. N.}
}
@article {4479,
	title = {A Monte Carlo study of model electrorheological fluids},
	journal = {Journal of Chemical Physics},
	volume = {111},
	number = {7},
	year = {1999},
	note = {ISI Document Delivery No.: 222GBTimes Cited: 4Cited Reference Count: 26},
	month = {Aug},
	pages = {3278-3287},
	type = {Article},
	abstract = {Monte Carlo results for both spherical and nonspherical electrorheological (ER) particles are described. The ER particles are modeled as hard spheres or hard ellipsoids of revolution with much smaller charged hard spheres (ions) constrained to their inner surface. NVT Monte Carlo calculations show that these models display the strong polarization and chain formation characteristic of ER fluids. Both prolate and oblate ER particles align with their longest axis directed along the applied field allowing for larger induced dipole moments than those obtained for spherical ER particles of equal volume. In all cases it is found that chaining occurs at relatively high fields where the induced dipole moments are approaching their maximum value. An interesting feature of nonspherical ER particles is the field-induced orientational order. It is found that even slightly nonspherical ER particles are highly ordered by fields which are weaker than those required to induce chain formation. Very weak fields are sufficient to generate strong orientational order in prolate ER particles with moderate aspect ratios. Further, field-ordered oblate ER particles tend to align their symmetry (short) axes to form a biaxial phase at high densities. The field-induced, liquid-crystal-like behavior of nonspherical ER particles is discussed in detail. (C) 1999 American Institute of Physics. [S0021-9606(99)51131-8].},
	keywords = {COMPUTER-SIMULATION, FIELD, FORCES, POINT-DIPOLE LIMIT, SHEAR RATE RESPONSE, SUSPENSIONS},
	isbn = {0021-9606},
	url = {<Go to ISI>://000081774700051},
	author = {Blair, M. J. and Patey, G. N.}
}
@article {3833,
	title = {Linewidths and shifts of very low temperature CO in He: A challenge for theory or experiment?},
	journal = {Journal of Chemical Physics},
	volume = {105},
	number = {10},
	year = {1996},
	note = {ISI Document Delivery No.: VF657Times Cited: 35Cited Reference Count: 42},
	month = {Sep},
	pages = {4005-4014},
	type = {Article},
	abstract = {The pressure broadening and shifting coefficients for pure rotational transitions of CO in a He bath gas at very low temperatures are calculated from the best available potential energy surfaces, and compared with very recent measurements by M. M. Beaky, T. M. Goyette, and F. C. De Lucia [J. Chem. Phys. 105, 3994 (1996)]. The results obtained for two recent empirical potentials determined from fits to Van der Waals spectra, and for a recent high quality purely ab initio surface, are consistent with one another. The best of the spectroscopic potentials also yields good agreement with high temperature virial coefficients and transport properties. Predictions from all three of these potentials agree with linebroadening and shifting measurements at temperatures above similar to 20 K, but are in substantial disagreement with the measurements at temperatures below 4 K. At present, the source of this discrepancy is not known. (C) 1996 American Institute of Physics.},
	keywords = {CARBON-MONOXIDE, FORCES, INFRARED-SPECTRUM, INTERMOLECULAR, MOLECULES, POTENTIAL-ENERGY SURFACE, PRESSURE-BROADENING PARAMETERS, ROTATIONAL-EXCITATION, SCATTERING, SPECTROSCOPY, TRIATOMIC-MOLECULES, VANDERWAALS},
	isbn = {0021-9606},
	url = {<Go to ISI>://A1996VF65700013},
	author = {Thachuk, M. and Chuaqui, C. E. and LeRoy, R. J.}
}
@article {2718,
	title = {CAVITATION OF A LENNARD-JONES FLUID BETWEEN HARD WALLS, AND THE POSSIBLE RELEVANCE TO THE ATTRACTION MEASURED BETWEEN HYDROPHOBIC SURFACES},
	journal = {Journal of Chemical Physics},
	volume = {98},
	number = {9},
	year = {1993},
	note = {ISI Document Delivery No.: LA763Times Cited: 106Cited Reference Count: 26},
	month = {May},
	pages = {7236-7244},
	type = {Article},
	abstract = {A Lennard-Jones fluid confined between two planar hard walls is simulated using grand canonical Monte Carlo, and capillary evaporation is found for liquid subcritical bulk states. General methods are given for simulating a metastable fluid beyond coexistence. For the systems studied, the liquid and the gas phases coexist in equilibrium at a separation of approximately 5 diam, the spinodal cavitation separation is at approximately 4 diam, and the spinodal condensation separation is at greater-than-or-similar-to 15 diam. The interaction pressure between the walls is found to be attractive and increases rapidly as the spinodal separation is approached. On the equilibrium liquid branch, the net pressure still appears significantly larger than the van der Waals attraction at separations of approximately 10 diam. A simple analytic theory is given, which relates the force to the approach of the separation-induced phase transition. It is suggested that this is the microscopic origin of the measured attractions between hydrophobic surfaces in water.},
	keywords = {ADSORPTION, AQUEOUS-ELECTROLYTE SOLUTIONS, FILMS, FORCES, MONTE-CARLO, PHASE-EQUILIBRIA, SLIT},
	isbn = {0021-9606},
	url = {<Go to ISI>://A1993LA76300069},
	author = {Berard, D. R. and Attard, P. and Patey, G. N.}
}
@article {7169,
	title = {LONG-RANGE ATTRACTIONS BETWEEN SOLUTES IN NEAR-CRITICAL FLUIDS},
	journal = {Physical Review A},
	volume = {45},
	number = {10},
	year = {1992},
	note = {ISI Document Delivery No.: HV267Times Cited: 32Cited Reference Count: 18},
	month = {May},
	pages = {7621-7623},
	type = {Note},
	abstract = {The Ornstein-Zernike equation is used to analyze adsorption at, and the forces between, solutes and walls in near-critical fluids. The density profile is shown to decay exponentially with the bulk correlation length. The forces between solutes and between walls are also exponentially long ranged with the bulk correlation length, and are always attractive for identical solutes.},
	keywords = {FORCES},
	isbn = {1050-2947},
	url = {<Go to ISI>://A1992HV26700076},
	author = {Attard, P. and Ursenbach, C. P. and Patey, G. N.}
}
