Phys.org November 8, 2024
Bubble printing is a patterning method in which particles are accumulated by the convection of bubbles generated by laser focusing that enables the high-speed, high-precision patterning of various micro/nanoparticles. It is used for metallic particles and organic particles for patterning solid particles and not on the patterning of liquid particles. Researchers in Japan fabricated liquid metal wiring patterns using a bubble printing method in which eutectic gallium‒indium alloy (EGaIn) colloidal particles were fixed on a glass substrate by generating microbubbles by focusing a femtosecond laser beam on the EGaIn colloidal particles. They made the wiring conductive by replacing gallium oxide with silver via galvanic replacement. Fine continuous lines of liquid metal colloids were drawn by reducing the laser power forming liquid metal wiring. They confirmed that the conductivity remained consistent even when the glass substrate was bent to a curvature… read more. Open Access TECHNICAL ARTICLE
Working principle and optical system of bubble printing. Working principle… Credit: Nanomaterials,14(20), 1665, 17 October 2024