Polyelectrolyte-Compression Forces between Spherical DNA Brushes
Soft Condensed Matter
2009-11-13 v1
Abstract
Optical tweezers are employed to measure the forces of interaction within a single pair of DNA-grafted colloids in dependence of the molecular weight of the DNA-chains, and the concentration and valence of the surrounding ionic medium. The resulting forces are short-range and set in as the surface-to-surface distance between the colloidal cores reaches the value of the brush height. The measured force-distance dependence is analyzed by means of a theoretical treatment based on the compression of the chains on the surface of the opposite-lying colloid. Quantitative agreement with the experiment is obtained for all parameter combinations.
Keywords
Cite
@article{arxiv.0710.0303,
title = {Polyelectrolyte-Compression Forces between Spherical DNA Brushes},
author = {Kati Kegler and Martin Konieczny and Gustavo Dominguez-Espinoza and Christof Gutsche and Matthias Salomo and Friedrich Kremer and Christos N. Likos},
journal= {arXiv preprint arXiv:0710.0303},
year = {2009}
}
Comments
4 pages, 4 figures, 1 table; manuscript submitted to Phys. Rev. Lett