Light-Induced Surface Tension Gradients for Hierarchical Assembly of Particles from Liquid Metals.

ABSTRACT: Achieving control over the motion of dissolved particles in liquid metals is of importance for the meticulous realization of hierarchical particle assemblies in a variety of nanofabrication processes. Brownian forces can impede the motion of such particles, impacting the degree of perfection that can be realized in assembled structures. Here, we show that light-induced Marangoni flow in liquid metals (i.e., liquid-gallium) with Laguerre-Gaussian (LG_pl) lasers as heating sources is an effective approach to overcome Brownian forces on particles, giving rise to predictable assemblies with a high degree of order. We show that by carefully engineering surface tension gradients in liquid-gallium using non-Gaussian LG_pl lasers, the Marangoni and convective flow that develops

SUBMITTER: Liang J 

PROVIDER: S-EPMC9951180 | biostudies-literature | 2023 Feb

REPOSITORIES: biostudies-literature