Department of Physics, Brandeis University, Waltham, Massachusetts 02454, USA.
Phys Rev Lett. 2010 Jun 25;104(25):258102. doi: 10.1103/PhysRevLett.104.258102. Epub 2010 Jun 22.
We discuss dynamical simulations and free energy calculations on patchy spheres with chiral pair interactions that spontaneously assemble into filamentous bundles. The chirality frustrates long-range crystal order by introducing twist between interacting subunits. For some ranges of system parameters this constraint leads to bundles with a finite diameter, and in other cases frustration is relieved by the formation of defects. While some self-limited structures can be modeled as twisted filaments arranged with local hexagonal symmetry, other structures are surprisingly complex.
我们讨论了带有手性配对相互作用的嵌段球体的动力学模拟和自由能计算，这些球体自发组装成丝状束。手性通过在相互作用的亚基之间引入扭曲，阻碍了长程晶体有序。对于某些系统参数范围，这种约束导致束的直径有限，而在其他情况下，通过形成缺陷来缓解挫折。虽然一些自限结构可以建模为具有局部六边形对称性排列的扭曲细丝，但其他结构却出人意料地复杂。
