Knoben Wout, Besseling N A M, Cohen Stuart M A
Laboratory of Physical Chemistry and Colloid Science, Wageningen University, Dreijenplein 6, NL-6703 HB Wageningen, The Netherlands.
Phys Rev Lett. 2006 Aug 11;97(6):068301. doi: 10.1103/PhysRevLett.97.068301. Epub 2006 Aug 7.
This is the first report of experimental observations of depletion interactions in solutions of a (hydrogen-bonded) reversible supramolecular polymer. Depletion forces were measured directly by colloidal probe atomic force microscopy. The range of the depletion force is consistent with existing independent experimental data. The interaction can be tuned by adding monofunctional chain stoppers to the solution, a possibility which is unique to supramolecular polymers. The depletion force is shown to be strong enough to induce phase separation in a colloidal suspension.
这是关于（氢键连接的）可逆超分子聚合物溶液中耗尽相互作用的实验观察的首次报告。通过胶体探针原子力显微镜直接测量了耗尽力。耗尽力的范围与现有的独立实验数据一致。通过向溶液中添加单官能链终止剂可以调节这种相互作用，这是超分子聚合物所特有的可能性。结果表明，耗尽力足够强，能够在胶体悬浮液中诱导相分离。
