Entropic Colloidal Interactions in Concentrated DNA Solutions Export

@article{citeulike:941006, abstract = {We explore the entropic interactions between a pair of micron-sized colloidal spheres in DNA solutions. By confining the particles in a line-scanned optical tweezer; we directly measured the functional form of the interaction potential with sub- k B T resolution in samples where the spheres and the polymer coils were of comparable size. The potential is well described by the Asakura-Oosawa depletion model even in the semidilute regime where DNA coils overlap strongly. Its range and depth increase with increasing concentration in a manner consistent with a crossover from a dilute solution of Gaussian coils to the weakly fluctuating semidilute regime dominated by two-point collisions which is unique to semiflexible polymers.}, author = {Verma, Ritu and Crocker, J. C. and Lubensky, T. C. and Yodh, A. G.}, citeulike-article-id = {941006}, citeulike-linkout-0 = {http://dx.doi.org/10.1103/PhysRevLett.81.4004}, citeulike-linkout-1 = {http://link.aps.org/abstract/PRL/v81/i18/p4004_1}, citeulike-linkout-2 = {http://link.aps.org/pdf/PRL/v81/i18/p4004_1}, day = {2}, doi = {10.1103/PhysRevLett.81.4004}, journal = {Physical Review Letters}, keywords = {depletion, laser-tweezer, polymer}, month = {November}, number = {18}, pages = {4004+}, posted-at = {2007-09-27 05:35:16}, priority = {2}, publisher = {American Physical Society}, title = {Entropic Colloidal Interactions in Concentrated DNA Solutions}, url = {http://dx.doi.org/10.1103/PhysRevLett.81.4004}, volume = {81}, year = {1998} }

TY - JOUR ID - citeulike:941006 L3 - citeulike-article-id:941006 N2 - We explore the entropic interactions between a pair of micron-sized colloidal spheres in DNA solutions. By confining the particles in a line-scanned optical tweezer; we directly measured the functional form of the interaction potential with sub- k B T resolution in samples where the spheres and the polymer coils were of comparable size. The potential is well described by the Asakura-Oosawa depletion model even in the semidilute regime where DNA coils overlap strongly. Its range and depth increase with increasing concentration in a manner consistent with a crossover from a dilute solution of Gaussian coils to the weakly fluctuating semidilute regime dominated by two-point collisions which is unique to semiflexible polymers. IS - 18 JF - Physical Review Letters TI - Entropic Colloidal Interactions in Concentrated DNA Solutions PB - American Physical Society VL - 81 SP - 4004 KW - depletion KW - laser-tweezer KW - polymer AU - Verma, Ritu AU - Crocker, JC AU - Lubensky, TC AU - Yodh, AG PY - 1998/11/02/ UR - http://dx.doi.org/10.1103/PhysRevLett.81.4004 ER -