Surface force apparatus for nanorheology under large shear strain.
We describe a surface force apparatus designed to probe the rheology of a nanoconfined medium under large shear amplitudes (up to 500 microm). The instrument can be operated in closed loop, controlling either the applied normal load or the thickness of the medium during shear experiments. Feedback control allows us to greatly extend the range of confinement/shear strain attainable with the surface force apparatus. The performances of the instrument are illustrated using hexadecane as the confined medium.
Bureau
Lionel
L
Institut des Nanosciences de Paris, UMR 7588 CNRS-Université Paris 6, 140 Rue de Lourmel, 75015 Paris, France. bureau@insp.jussieu.fr
D004548:Elasticity; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008422:Materials Testing / Q000295:instrumentation* / Q000379:methods; D036103:Nanotechnology / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results; D012212:Rheology / Q000295:instrumentation* / Q000379:methods; D012680:Sensitivity and Specificity; D033081:Shear Strength; D013314:Stress, Mechanical; D013500:Surface Tension; D014783:Viscosity