公开(公告)号：US20190232557A1

公开(公告)日：2019-08-01

申请号：US16261535

申请日：2019-01-29

申请人： Massachusetts Institute of Technology

发明人： Anastasios John Hart ,  Justin Douglas Beroz ,  Alvin Thong Lip Tan

IPC分类号： B29C64/165 ,  C09D5/22 ,  C09D1/00 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B29C64/20 ,  B29C64/393 ,  B33Y70/00

CPC分类号： B29C64/165 ,  B29C64/20 ,  B29C64/393 ,  B33Y10/00 ,  B33Y30/00 ,  B33Y50/02 ,  B33Y70/00 ,  C09D1/00 ,  C09D5/22

摘要： Disclosed are methods for building colloidal solids by precipitation from a liquid bridge using a needle through which a colloidal particle suspension is dispensed onto a substrate in a temperature-controlled environment. The substrate can rest on a motion-controlled stage, and freeform shapes can be built by coordinating the motion of the stage with the rate of dispense of colloidal particle suspension. Aspects include a scaling law that governs the rate of assembly and a direct-write colloidal assembly process that combines self-assembly with direct-write 3D printing, and can be used to build exemplary freestanding structures using a diverse materials, such as polystyrene, silica and gold particles. Additionally, disclosed are methods for predicting and eliminating cracking by a geometric relationship between particle size and structure dimensions, enabling the production of macroscale, crack-free colloidal crystals.

公开(公告)号：US11597144B2

公开(公告)日：2023-03-07

申请号：US16261535

申请日：2019-01-29

申请人： Massachusetts Institute of Technology

发明人： Anastasios John Hart ,  Justin Douglas Beroz ,  Alvin Thong Lip Tan

IPC分类号： B29C64/165 ,  B33Y10/00 ,  B29C64/106 ,  C09D5/22 ,  C09D1/00 ,  B33Y70/00 ,  B33Y50/02 ,  B29C64/20 ,  B29C64/393 ,  B33Y30/00

摘要： Disclosed are methods for building colloidal solids by precipitation from a liquid bridge using a needle through which a colloidal particle suspension is dispensed onto a substrate in a temperature-controlled environment. The substrate can rest on a motion-controlled stage, and freeform shapes can be built by coordinating the motion of the stage with the rate of dispense of colloidal particle suspension. Aspects include a scaling law that governs the rate of assembly and a direct-write colloidal assembly process that combines self-assembly with direct-write 3D printing, and can be used to build exemplary freestanding structures using a diverse materials, such as polystyrene, silica and gold particles. Additionally, disclosed are methods for predicting and eliminating cracking by a geometric relationship between particle size and structure dimensions, enabling the production of macroscale, crack-free colloidal crystals.