论文标题
排斥胶体球的2D晶体中的哑铃杂质诱导颗粒构成的位错
Dumbbell impurities in 2D crystals of repulsive colloidal spheres induce particle-bound dislocations
论文作者
论文摘要
杂质引起的缺陷对于晶体的性质起着至关重要的作用，但对具有各向异性形状的杂质知之甚少。在这里，我们研究了胶体哑铃如何变形并与流体界面处带电胶体球的六边形晶体相互作用。我们发现，哑铃长度的细微变化会导致从局部变形到粒子结合的脱位的过渡，并确定哑铃如何在排斥的六边形晶格内移动。我们的结果为通过粒子结合的位错提供了控制材料特性的新途径。
Impurity-induced defects play a crucial role for the properties of crystals, but little is known about impurities with anisotropic shape. Here, we study how colloidal dumbbells distort and interact with a hexagonal crystal of charged colloidal spheres at a fluid interface. We find that subtle changes in the dumbbell length induce a transition from a local distortion to a particle-bound dislocation, and determine how the dumbbell moves inside the repulsive hexagonal lattice. Our results provide new routes towards controlling material properties through particle-bound dislocations.
