Understanding depletion forces beyond entropy
凝聚态物理
2009-10-31 v1
摘要
The effective interaction energy of a colloidal sphere in a suspension containing small amounts of non-ionic polymers and a flat glass surface has been measured and calculated using total internal reflection microscopy (TIRM) and a novel approach within density functional theory (DFT), 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.
引用
@article{arxiv.cond-mat/9908350,
title = {Understanding depletion forces beyond entropy},
author = {C. Bechinger and D. Rudhardt and P. Leiderer and R. Roth and S. Dietrich},
journal= {arXiv preprint arXiv:cond-mat/9908350},
year = {2009}
}