Cracking of Colloidal Films to Generate Rectangular Fragments
- Authors
- Lee, Yunchan; Kim, Jaekyoung; Lee, Soojin; Wooh, Sanghyuk; Yoon, Hyunsik; Char, Kookheon
- Issue Date
- Apr-2022
- Publisher
- American Chemical Society
- Citation
- Langmuir, v.38, no.16, pp 4935 - 4941
- Pages
- 7
- Journal Title
- Langmuir
- Volume
- 38
- Number
- 16
- Start Page
- 4935
- End Page
- 4941
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/58005
- DOI
- 10.1021/acs.langmuir.2c00328
- ISSN
- 0743-7463
1520-5827
- Abstract
- Cracks are common in nature. Cracking is known as an irreversible and uncontrollable process. To control the cracking patterns, many researchers have proposed methods to prepare notches for stress localization on films. In this work, we investigate a method of controlling cracks by making microscale pyramid patterns that have notches between the pyramids. After preparing pyramid patterns consisting of colloidal particles with organic residue, we annealed them to induce volume shrinkage and cracking between the pyramids. We studied the effect of film thickness on cracking and the generation of rectangular fragments consisting of multiple pyramids. The area of rectangular fragments was in good agreement with the results of scaling analysis. The concept of controlling cracks by imprinting notches on a film and the relationship with the film thickness can guide the study of cracking phenomena. © 2022 American Chemical Society. All rights reserved.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > School of Chemical Engineering and Material Science > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/58005)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.