Manning G S
Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ, USA.
Eur Phys J E Soft Matter. 2009 Dec;30(4):411-5. doi: 10.1140/epje/i2009-10540-5. Epub 2009 Dec 3.
The low-field transverse polarizability of the counterions condensed on an isolated charged rod is small. We show that it can be much larger if the rod is a member of an assembly of aligned rods. The polarization free energy of the assembly of rods in a transverse field is then similar to its polarization free energy in a field parallel to the rods. The polarization free energy of the assembly in a transverse field becomes lower than in a parallel field if the extent of the assembly (as measured, for example, by the diameter of a cylindrical assembly) is larger than the length of the individual rods. We suggest that this model may provide a reasonable explanation for the occurrence of "anomalous" birefringence in systems of interacting charged rodlike particles.
凝聚在孤立带电棒上的抗衡离子的低场横向极化率很小。我们表明，如果该棒是排列好的棒束的一部分，其极化率会大得多。那么，棒束在横向场中的极化自由能与其在平行于棒的场中的极化自由能相似。如果棒束的范围（例如，通过圆柱形棒束的直径来衡量）大于单个棒的长度，棒束在横向场中的极化自由能会低于在平行场中的极化自由能。我们认为，该模型可能为相互作用的带电棒状粒子系统中“异常”双折射的出现提供合理的解释。
