Understanding Depletion Forces beyond Entropy

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BECHINGER, Clemens, Daniel RUDHARDT, Paul LEIDERER, Roland ROTH, Siegfried DIETRICH, 1999. Understanding Depletion Forces beyond Entropy. In: Physical Review Letters. 83(19), pp. 3960-3963

@article{Bechinger1999Under-9422, title={Understanding Depletion Forces beyond Entropy}, year={1999}, doi={10.1103/PhysRevLett.83.3960}, number={19}, volume={83}, journal={Physical Review Letters}, pages={3960--3963}, author={Bechinger, Clemens and Rudhardt, Daniel and Leiderer, Paul and Roth, Roland and Dietrich, Siegfried} }

Understanding Depletion Forces beyond Entropy deposit-license Bechinger, Clemens Rudhardt, Daniel Bechinger, Clemens Leiderer, Paul Dietrich, Siegfried Rudhardt, Daniel Roth, Roland 2011-03-24T17:56:22Z 2011-03-24T17:56:22Z eng application/pdf The effective interaction energy of a colloidal sphere in a suspension containing small amounts of nonionic polymers and a flat glass surface has been measured and calculated using total internal reflection microscopy and a novel approach within density functional theory, respectively. Quantitative agreement between experiment and theory demonstrates that the resulting repulsive part of the depletion forces cannot be interpreted entirely in terms of entropic arguments but that particularly at small distances (&100 nm) attractive dispersion forces have to be taken into account. Dietrich, Siegfried 1999 Leiderer, Paul First publ. in: Physical Review Letters 83 (1999), 19, pp. 3960-3963 Roth, Roland

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