Versatile Mesoporous Microblocks Prepared by Pattern‐Induced Cracking of Colloidal Films

Mesoporous microparticles have the potential to be used in various fields, such as energy generation, sensing, and the environmental field. Recently, the process of making homogeneous microparticles in an economical and environmentally friendly way has gained much attention. Herein, rectangular meso...

Full description

Saved in:
Bibliographic Details
Published in:Advanced materials (Weinheim) 2023-08, Vol.35 (32), p.e2300952-n/a
Main Authors: Lee, Yunchan, Jo, Min‐Gi, Kim, Jaekyoung, Kim, Ji Hoon, Kim, Jae Jung, Char, Kookheon, Yoon, Hyunsik
Format: Article
Language:English
Subjects:
Colloids
cracks
Materials science
mesoporous particles
microblocks
Microparticles
Notches
separation
Substrates
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Mesoporous microparticles have the potential to be used in various fields, such as energy generation, sensing, and the environmental field. Recently, the process of making homogeneous microparticles in an economical and environmentally friendly way has gained much attention. Herein, rectangular mesoporous microblocks of various designs are produced by manipulating the fragmentation of colloidal films consisting of micropyramids while controlling the notch angles of pyramidal edges. During calcination of the colloidal films, cracks are generated in the valleys of micropyramids acting as notches, and the angle of notches can be controlled by the prepattern underneath the micropyramids. By changing the location of notches with sharp angles, the shape of microblocks can be controlled with excellent uniformity. After detaching the microblocks from substrates, mesoporous microparticles of various sizes with multiple functions are easily produced. This study demonstrates anti‐counterfeiting functions by encoding the rotation angles of rectangular microblocks of various sizes. In addition, the mesoporous microparticles can be utilized for separating desired chemicals mixed with chemicals of different charges. The method of fabricating size‐tunable functionalized mesoporous microblocks can be a platform technology to prepare special films and catalysts and for environmental applications. Versatile mesoporous microblocks are fabricated through the controlling crack template, which is an economic and environmentally friendly process. Various sizes of rectangular microblocks demonstrate anticounterfeit functions by encoding the rotation angles with different colors. In addition, size‐tunable functionalized microblocks selectively separate chemicals and collect or eliminate them for environmental applications.
ISSN:0935-9648
1521-4095
DOI:10.1002/adma.202300952