Micro-rheology on (polymer-grafted) colloids using optical tweezers

被引：18
|
作者：
Gutsche, C. [1 ]
Elmahdy, M. M. [1 ,2 ]
Kegler, K. [1 ]
Semenov, I. [1 ]
Stangner, T. [1 ]
Otto, O. [1 ,3 ]
Ueberschaer, O. [1 ]
Keyser, U. F. [3 ]
Krueger, M. [4 ,5 ,6 ]
Rauscher, M. [4 ,5 ]
Weeber, R. [7 ]
Harting, J. [7 ,8 ]
Kim, Y. W. [9 ,10 ,11 ]
Lobaskin, V. [11 ,12 ]
Netz, R. R. [10 ,11 ]
Kremer, F. [1 ]
机构：
[1] Univ Leipzig, Inst Expt Phys 1, D-04103 Leipzig, Germany
[2] Mansoura Univ, Dept Phys, Mansoura 35516, Egypt
[3] Univ Cambridge, Cavendish Lab, Cambridge CB3 0HE, England
[4] Max Planck Inst Met Res, D-70569 Stuttgart, Germany
[5] Univ Stuttgart, Inst Theoret & Angew Phys, D-70569 Stuttgart, Germany
[6] Fachbereich Phys, D-78464 Constance, Germany
[7] Univ Stuttgart, Inst Comp Phys, D-70569 Stuttgart, Germany
[8] TU Eindhoven, Dept Appl Phys, NL-5600 MD Eindhoven, Netherlands
[9] Korea Inst Adv Study, Sch Phys, Seoul 130722, South Korea
[10] Univ Calif Santa Barbara, Mat Res Lab, Santa Barbara, CA 93106 USA
[11] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany
[12] Univ Coll Dublin, Sch Phys, Dublin 4, Ireland
来源：
JOURNAL OF PHYSICS-CONDENSED MATTER | 2011年 / 23卷 / 18期
基金：
英国工程与自然科学研究理事会;
关键词：
DILUTE POLYDISPERSE SYSTEM; INTERACTION POTENTIALS; INTERACTING SPHERES; DNA; SEDIMENTATION; PARTICLES; FORCES; BRUSHES; ENERGY; MODEL;
D O I：
10.1088/0953-8984/23/18/184114
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Optical tweezers are experimental tools with extraordinary resolution in positioning (+/- 1 nm) a micron-sized colloid and in the measurement of forces (+/- 50 fN) acting on it-without any mechanical contact. This enables one to carry out a multitude of novel experiments in nano- and microfluidics, of which the following will be presented in this review: (i) forces within single pairs of colloids in media of varying concentration and valency of the surrounding ionic solution, (ii) measurements of the electrophoretic mobility of single colloids in different solvents (concentration, valency of the ionic solution and pH), (iii) similar experiments as in (i) with DNA-grafted colloids, (iv) the nonlinear response of single DNA-grafted colloids in shear flow and (v) the drag force on single colloids pulled through a polymer solution. The experiments will be described in detail and their analysis discussed.
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页数：17
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