Direct-Write Freeform Colloidal Assembly

Advanced Materials
Alvin T L TanA John Hart

Abstract

Colloidal assembly is an attractive means to control material properties via hierarchy of particle composition, size, ordering, and macroscopic form. However, despite well-established methods for assembling colloidal crystals as films and patterns on substrates, and within microscale confinements such as droplets or microwells, it has not been possible to build freeform colloidal crystal structures. Direct-write colloidal assembly, a process combining the bottom-up principle of colloidal self-assembly with the versatility of direct-write 3D printing, is introduced in the present study. By this method, centimeter-scale, free-standing colloidal structures are built from a variety of materials. A scaling law that governs the rate of assembly is derived; macroscale structural color is tailored via the size and crystalline ordering of polystyrene particles, and several freestanding structures are built from silica and gold particles. Owing to the diversity of colloidal building blocks and the means to control their interactions, direct-write colloidal assembly could therefore enable novel composites, photonics, electronics, and other materials and devices.

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Citations

Dec 31, 2019·Small·Alvin T L TanA John Hart
Mar 5, 2020·Advanced Materials·Brian ElderYong Lin Kong
Mar 19, 2020·Small·Wei HongXudong Chen
Apr 6, 2019·Annual Review of Chemical and Biomolecular Engineering·Cheng ZhuChristopher M Spadaccini
Jun 30, 2019·Science·Matthew R BegleyTyler R Ray
Jan 17, 2020·Advanced Materials·Jinghan ZhuChad A Mirkin
Feb 2, 2021·Science Advances·D GiuntiniG A Schneider
Mar 26, 2021·Nature·Peter J SantosRobert J Macfarlane
Oct 31, 2020·ACS Applied Materials & Interfaces·Shenglong ShangShu Yang
Aug 28, 2021·Micromachines·Soheila Shabaniverki, Jaime J Juárez
Sep 4, 2021·Nano Letters·Robert J Macfarlane
Oct 19, 2021·Nano Letters·Hemant Kumar RautJoel K W Yang
Nov 25, 2021·Science Advances·Jong Bin KimShin-Hyun Kim
Nov 2, 2021·Advanced Materials·Yu ZhangYanlin Song

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