Dreyfus R, Lacoste D, Bibette J, Baudry J
Center for Soft Matter Research, 4 Washington Place, New York University, New York, NY 10003, USA.
Eur Phys J E Soft Matter. 2009 Feb;28(2):113-23. doi: 10.1140/epje/i2008-10414-4.
In 1994 Leal Calderon et al. (Phys. Rev. Lett. 72, 2959 (1994)) introduced the magnetic chaining technique to directly probe the force-distance profile between colloidal particles. In this paper, we revisit this approach in two ways. First, we describe a new experimental design which allows us to utilize sample volumes as low as a few microliters, involving femtomoles of surface active macromolecules. Secondly, we extensively describe the characterization and preparation of the magnetic colloids, and we give a quantitative evaluation of performance and resolution of the technique in terms of force and interparticle separation.
1994年，莱亚尔·卡尔德隆等人（《物理评论快报》第72卷，第2959页（1994年））引入了磁链技术，以直接探测胶体颗粒之间的力-距离曲线。在本文中，我们通过两种方式重新审视这种方法。首先，我们描述了一种新的实验设计，它使我们能够利用低至几微升的样品体积，其中包含飞摩尔的表面活性大分子。其次，我们广泛描述了磁性胶体的表征和制备，并从力和颗粒间间距方面对该技术的性能和分辨率进行了定量评估。
