Meniscus-Guided Control of Supersaturation for the Crystallization of High Quality Metal Organic Framework Thin Films

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Herein, meniscus-guided crystallization is introduced as a means to grow high quality metal organic framework (MOF) thin films. A meniscus was formed between a target substrate and a coating blade, and by adjusting various parameters such as substrate temperature and coating speed, supersaturation was precisely controlled, through which the crystallization process was finely tuned. Consequently, a densely packed intergrown MOF thin film with thickness tunability down to 450 nm was demonstrated. The individual crystals exhibited monodispersity in size. Interestingly, the use of a microstructured coating blade resulted in the change of crystal shape, attributed to the supersaturation-induced kinetically driven crystallization proc-ess. Our film growth process is large-area scalable, uses a miniscule amount of solution, and has substrate versatility. Such an insight and demonstration of MOF thin-film growth via meniscus-guided crystallization will be highly useful for the development of various MOF thin-film-based devices in the future.
Publisher
AMER CHEMICAL SOC
Issue Date
2019-09
Language
English
Article Type
Article
Citation

CHEMISTRY OF MATERIALS, v.31, no.18, pp.7377 - 7385

ISSN
0897-4756
DOI
10.1021/acs.chemmater.9b01996
URI
http://hdl.handle.net/10203/267980
Appears in Collection
MS-Journal Papers(저널논문)
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