Understanding Depletion Forces beyond Entropy

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257_physrevlett_1999.pdf
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1999
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Rudhardt, Daniel
Roth, Roland
Dietrich, Siegfried
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Physical Review Letters. 1999, 83(19), pp. 3960-3963. Available under: doi: 10.1103/PhysRevLett.83.3960
Zusammenfassung

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.

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ISO 690BECHINGER, Clemens, Daniel RUDHARDT, Paul LEIDERER, Roland ROTH, Siegfried DIETRICH, 1999. Understanding Depletion Forces beyond Entropy. In: Physical Review Letters. 1999, 83(19), pp. 3960-3963. Available under: doi: 10.1103/PhysRevLett.83.3960
BibTex
@article{Bechinger1999Under-9422,
  year={1999},
  doi={10.1103/PhysRevLett.83.3960},
  title={Understanding Depletion Forces beyond Entropy},
  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}
}
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