Forces of Interaction between DNA-Grafted Colloids: An Optical Tweezer Measurement

by: K Kegler, M Salomo, F Kremer

Physical Review Letters, Vol. 98, No. 5. (2007)

View FullText article

Scitation (AIP), APS Permanent Link, DOI

Reviews [Write a review of this article]

There are no reviews of this article

Find related articles from these CiteULike users

dchen

Find related articles with these CiteULike tags

2007, biology, colloids, opticaltweezer

摘要

Optical tweezers are employed to measure the forces of interaction between single DNA-grafted colloids. Parameters to be varied are the length of the DNA, the grafting density, and the ion concentration of the surrounding medium. From the measured force-separation dependence an interaction length at a given force is deduced. It shows in the mushroom regime a scaling with the grafting density which levels off for brushes. For the latter the transition from an osmotic to a salted brush can be traced in detail by varying the ion concentration in accordance with mean field theories.

@article{citeulike:2563086, abstract = {Optical tweezers are employed to measure the forces of interaction between single DNA-grafted colloids. Parameters to be varied are the length of the DNA, the grafting density, and the ion concentration of the surrounding medium. From the measured force-separation dependence an interaction length at a given force is deduced. It shows in the mushroom regime a scaling with the grafting density which levels off for brushes. For the latter the transition from an osmotic to a salted brush can be traced in detail by varying the ion concentration in accordance with mean field theories.}, author = {Kegler, K. and Salomo, M. and Kremer, F. }, citeulike-article-id = {2563086}, doi = {10.1103/PhysRevLett.98.058304}, journal = {Physical Review Letters}, keywords = {2007, biology, colloids, opticaltweezer}, number = {5}, posted-at = {2008-03-19 17:00:52}, priority = {2}, publisher = {APS}, title = {Forces of Interaction between DNA-Grafted Colloids: An Optical Tweezer Measurement}, url = {http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal\&id=PRLTAO000098000005058304000001\&idtype=cvips\&gifs=yes}, volume = {98}, year = {2007} }

RIS record

TY - JOUR ID - citeulike:2563086 L3 - citeulike-article-id:2563086 TI - Forces of Interaction between DNA-Grafted Colloids: An Optical Tweezer Measurement JF - Physical Review Letters VL - 98 IS - 5 PB - APS N2 - Optical tweezers are employed to measure the forces of interaction between single DNA-grafted colloids. Parameters to be varied are the length of the DNA, the grafting density, and the ion concentration of the surrounding medium. From the measured force-separation dependence an interaction length at a given force is deduced. It shows in the mushroom regime a scaling with the grafting density which levels off for brushes. For the latter the transition from an osmotic to a salted brush can be traced in detail by varying the ion concentration in accordance with mean field theories. KW - 2007 KW - biology KW - colloids KW - opticaltweezer AU - Kegler, K AU - Salomo, M AU - Kremer, F PY - 2007/// UR - http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=PRLTAO000098000005058304000001&idtype=cvips&gifs=yes ER -

RIS BibTeX