Year: 2012
Type: conference-paper
Abstract: We present a direct-write technique for assembly of microscale 3D colloidal crystals on substrates.We use a custombuilt high-resolution liquid manipulation system to dispense colloidal suspensions through a capillary tip.Using this system, we establish a liquid bridge between the capillary tip and a temperature-controlled substrate, initiating crystal growth upward from the substrate.We demonstrate construction of cone-shaped and tower structures by controlling the dynamic shape of the liquid meniscus during crystal precipitation.Interplay between lateral capillary forces and granular cohesion governs assembly.Finally, we show that confinement of the meniscus on microfabricated template features enables assembly of discrete particle clusters.
Authors: J. Beroz, M. Bedewy, A.J. Hart
Institution: University of Michigan
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2182874014