A5038461553- Force Microscopy Techniques and Applications
- Minerals Flotation and Separation Techniques
- Electrostatics and Colloid Interactions
- Mechanical and Optical Resonators
- Material Dynamics and Properties
- Pickering emulsions and particle stabilization
- Adhesion, Friction, and Surface Interactions
- Electrohydrodynamics and Fluid Dynamics
- Microfluidic and Bio-sensing Technologies
- Surfactants and Colloidal Systems
- Characterization and Applications of Magnetic Nanoparticles
- Fluid Dynamics and Mixing
- Liquid Crystal Research Advancements
- Surface Modification and Superhydrophobicity
- Rheology and Fluid Dynamics Studies
- Enhanced Oil Recovery Techniques
- Experimental and Theoretical Physics Studies
- Fluid Dynamics and Thin Films
- Analytical Chemistry and Sensors
- Spectroscopy and Quantum Chemical Studies
- Quantum Electrodynamics and Casimir Effect
- Electrowetting and Microfluidic Technologies
- Rare-earth and actinide compounds
- Recycling and Waste Management Techniques
- Drilling and Well Engineering
Monash University
2019-2023
Deakin University
2010-2016
University of South Australia
2002-2011
Central Queensland University
2006-2007
The University of Melbourne
2006-2007
National University of Singapore
2007
Frumkin Institute of Physical Chemistry and Electrochemistry
2005-2006
Max Planck Institute for Polymer Research
2001-2006
Chinese Academy of Sciences
2006
Lanzhou Institute of Chemical Physics
2006
The force as a function of separation has been measured between two molecularly smooth surfaces immersed in the liquid octamethylcyclotetrasiloxane (OMCTS) whose molecules are quasispherical diameter ∼1.0 nm. is an oscillatory distance, varying attraction and repulsion, with periodicity equal to size within experimental resolution ∼0.1 oscillations decay rapidly distance: their measurable range 6–10 molecular diameters magnitude exceeds that conventional van der Waals forces at small...
We present measurements of the thickness as a function time liquid films they are squeezed between molecularly smooth mica surfaces. Three Newtonian, nonpolar liquids have been studied: octamethylcyclotetrasiloxane, n-tetradecane, and n-hexadecane. The film thicknesses determined with an accuracy 0.2 nm drain from ∼1 μm to few molecular layers. Results in excellent agreement Reynolds theory lubrication for above 50 nm. For thinner drainage is slower than theoretical prediction, which can be...
A descriptive account is given of the surface forces acting between two solids. Different contributions to force are outlined, with particular attention paid underlying mechanisms, and how they affected by nature medium surfaces. This followed a discussion areas ceramic science engineering in which play role.
Simultaneous measurements of surface force and charge demonstrate strong attraction due to the spontaneous transfer electrical from one smooth insulator (mica) another (silica) as a result simple, nonsliding contact in dry nitrogen. The measured densities are 5 20 millicoulombs per square meter after contact. work required separate charged surfaces is typically 6 9 joules meter, comparable fracture energies ionic-covalent materials. Observation partial gas discharges when approximately 1...
Measurements have been made of the solvation forces between mica surfaces in even-numbered n-alkanes from hexane to hexadecane. In all cases force law is qualitatively very similar, characterized by a decaying oscillatory function distance, as occurs for simple isotropic liquids. The spacing successive minima does not increase with carbon number, and comparable width linear alkane molecule rather than its length or any average diameter. This suggests that alkanes some tendency towards...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDouble-layer and solvation forces measured in a molten salt its mixtures with waterR. G. Horn, D. F. Evans, B. W. NinhamCite this: J. Phys. Chem. 1988, 92, 12, 3531–3537Publication Date (Print):June 1, 1988Publication History Published online1 May 2002Published inissue 1 June 1988https://pubs.acs.org/doi/10.1021/j100323a042https://doi.org/10.1021/j100323a042research-articleACS PublicationsRequest reuse permissionsArticle...
Refractive indices have been measured throughout the nematic phase of 4-n-pentyl-4'cyanobiphenyl (5CB) and smectic A phases 4-n-octyl-4'-cyanobiphenyl (8CB). The Vuks Neugebauer methods calculating order parameter are compared. Without knowledge molecular polarisabilities it is only possible to calculate a quantity proportional parameter, within this limitation found that two give identical results. scaled using extrapolation method suggested by Haller [14]. Using suitable average refractive...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular organization and viscosity of a thin film molten polymer between two surfaces as probed by force measurementsR. G. Horn J. N. IsraelachviliCite this: Macromolecules 1988, 21, 9, 2836–2841Publication Date (Print):September 1, 1988Publication History Published online1 May 2002Published inissue 1 September 1988https://pubs.acs.org/doi/10.1021/ma00187a032https://doi.org/10.1021/ma00187a032research-articleACS PublicationsRequest reuse...
On peut obtenir des renseignements sur la structure d'un film de cristal liquide qui sépare deux surfaces solides en mesurant les variations, fonction leur séparation, force s'exerce entre elles.Ici, ces mesures sont faites utilisant mica moléculairement planes séparées par un liquide, le 4'-n-pentyl 4-cyanobiphényle (5CB).L'orientation du 5CB est soit planaire homéotrope.La déterminée mesure flexion ressort supporte une feuilles mica, et technique optique simultanément utilisée pour mesurer...
Film thinning experiments have been conducted with aqueous films between two air phases in a thin film pressure balance. The are free of added surfactant but simple NaCl electrolyte is some experiments. Initially the begin comparatively large volume water cylindrical capillary tube few millimeters diameter, and by withdrawing from center bounding menisci drawn together at prescribed rate. This models bubbles approaching controlled speed. In pure water, results show three regimes behavior...
The plausibility of the entropic repulsion electrical double layers acting to stabilize an equilibrium thickness intergranular glass films in polycrystalline ceramics is explored. Estimates screening length, surface potential, and charge required provide a repulsive force sufficiently large balance attractive van der Waals capillary forces for observable thicknesses film are calculated do not appear be beyond possibility. However, it has yet established whether crystalline particles...
An atomic force microscope was used to measure the forces acting between two polystyrene latex spheres in aqueous media. The results show an electrostatic repulsion at large separations which is overtaken by attractive "hook" that pulls into contact from a considerable range (20−400 nm), much larger than could be expected for van der Waals attraction. of operation this attraction varies one experiment another and not correlated with electrolyte concentration. However, found decrease...
We report resistivity, $\ensuremath{\rho}(T)$, and specific-heat, $C(T)$, results on near stoichiometric $\mathrm{CeCu}{}_{2}{\mathrm{Si}}_{2}$ samples, in the vicinity of a quantum critical point (QCP). The latter is defined by ${T}_{A}\ensuremath{\rightarrow}0$, where ${T}_{A}\ensuremath{\lesssim}0.8\mathrm{K}$ marks transition into spin-density--wave-type ``phase $A$'' which competes with heavy-fermion superconductivity below ${T}_{c}\ensuremath{\approx}0.65\mathrm{K}$. Upon approaching...