Programmable Local Orientation of Micropores by Mold-Assisted Ice Templating

Xiaohong Zhou, Liang Yin, Baisong Yang, Chuyang Chen, Wenhui Chen, Yu Xie, Xichen Yang, Jonathan T. Pham, Sheng Liu, Longjian Xue

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Pore geometry plays a crucial role in determining the properties and functions of porous materials. Various methods have been developed to prepare porous materials that have randomly distributed or well-aligned pores. However, a technique capable of fine regulation of local pore orientation is still highly desired but difficult to attain. A technique, termed mold-assisted ice templating (MIT), is reported to control and program the local orientation of micropores. MIT employs a copper mold of a particular shape (for instance a circle, square, hexagon, or star) and a cold finger to regulate the 3D orientation of a local temperature gradient, which directs the growth of ice crystals; this approach results in the formation of finely regulated patterns of lamellar pore structures. Moreover, the lamellar thickness and spacing can be tuned by controlling the solution concentration.

Original languageEnglish
Article number2000963
JournalSmall Methods
Volume5
Issue number2
DOIs
StatePublished - Feb 15 2021

Bibliographical note

Publisher Copyright:
© 2020 Wiley-VCH GmbH

Keywords

  • ice templates
  • local orientation
  • porous structures
  • temperature gradients

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science

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