Cash Caitlin E, Wang Jeremy, Martirossyan Maya M, Ludlow B Kemper, Baptista Alejandro E, Brown Nina M, Weissler Eli J, Abacousnac Jatin, Gerbode Sharon J
Department of Physics, Harvey Mudd College, Claremont, California 91711, USA.
Phys Rev Lett. 2018 Jan 5;120(1):018002. doi: 10.1103/PhysRevLett.120.018002.
We find that laser-induced local melting attracts and deforms grain boundaries in 2D colloidal crystals. When a melted region in contact with the edge of a crystal grain recrystallizes, it deforms the grain boundary-this attraction is driven by the multiplicity of deformed grain boundary configurations. Furthermore, the attraction provides a method to fabricate artificial colloidal crystal grains of arbitrary shape, enabling new experimental studies of grain boundary dynamics and ultimately hinting at a novel approach for fabricating materials with designer microstructures.
我们发现，激光诱导的局部熔化会吸引二维胶体晶体中的晶界并使其变形。当与晶粒边缘接触的熔化区域重新结晶时，它会使晶界变形——这种吸引力是由变形晶界构型的多样性驱动的。此外，这种吸引力提供了一种制造任意形状人工胶体晶粒的方法，使得能够对晶界动力学进行新的实验研究，并最终暗示了一种制造具有定制微观结构材料的新方法。
