dc.identifier.uri |
http://dx.doi.org/10.15488/13921 |
|
dc.identifier.uri |
https://www.repo.uni-hannover.de/handle/123456789/14035 |
|
dc.contributor.author |
Keppler, Nils Christian
|
|
dc.contributor.author |
Fricke, Johanna
|
|
dc.contributor.author |
Schaate, Andreas
|
|
dc.contributor.author |
Hannebauer, Adrian
|
|
dc.contributor.author |
Hindricks, Karen Deli Josephine
|
|
dc.contributor.author |
Zailskas, Saskia
|
|
dc.contributor.author |
Behrens, Peter
|
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dc.date.accessioned |
2023-06-23T06:48:31Z |
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dc.date.available |
2023-06-23T06:48:31Z |
|
dc.date.issued |
2022 |
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dc.identifier.citation |
Keppler, N.C.; Fricke, J.; Schaate, A.; Hannebauer, A.; Hindricks, K.D.J.; Zailskas, S. et al.: Seeding Layer Approach for the Synthesis of Co-ZIF-90 Thin Films of Optical Quality. In: Crystal Growth & Design 22 (2022), Nr. 12, S. 7008-7020. DOI: https://doi.org/10.1021/acs.cgd.2c00664 |
|
dc.description.abstract |
The growth of zeolitic imidazolate framework (ZIF) thin films is an interesting topic, since ZIFs have a high thermal and chemical stability compared to many other MOFs. A variety of functionalities can be introduced via the imidazole linker molecule. Here, we report on a new approach for the preparation of thin films of a novel ZIF material: Co-ZIF-90. The preparation of thin films is possible on silicon or glass when ZIF-8 seeding layers are deposited first. The resulting constructions are effectively MOF-on-MOF layer systems. The synthesis procedure has been optimized with regard to obtaining high-quality thin films of Co-ZIF-90 on ZIF-8 for optical applications. Notably, the preparation of Co-ZIF-90 thin films is possible only by using a mixture of two different cobalt precursor salts (acetate and nitrate). The thin films are characterized in detail. With regard to the use as an optical material, UV-vis absorption spectra of the MOF-on-MOF constructs were measured and the refractive index of Co-ZIF-90 was determined using ellipsometry. Furthermore, the refractive index of the Co-ZIF-90 film can be modulated reversibly by the adsorption and desorption of water via the gas phase. The kinetics of this fast process are on the time scale of 1 s. In addition to the preparation of thin films, we obtained Co-ZIF-90 as a powder sample and basically characterized the powder. The approach to use an easy-to-crystallize ZIF-8 film as a seeding layer for the growth of films of other ZIFs may be extended as a general concept for the deposition of crystalline ZIF layers in such cases, where a direct deposition is difficult or not possible. |
eng |
dc.language.iso |
eng |
|
dc.publisher |
Washington, DC : ACS Publ. |
|
dc.relation.ispartofseries |
Crystal Growth & Design 22 (2022), Nr. 12 |
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dc.rights |
CC BY-NC-ND 4.0 Unported |
|
dc.rights.uri |
https://creativecommons.org/licenses/by-nc-nd/4.0/ |
|
dc.subject |
Chemical stability |
eng |
dc.subject |
Cobalt compounds |
eng |
dc.subject |
Deposition |
eng |
dc.subject |
Film preparation |
eng |
dc.subject |
Refractive index |
eng |
dc.subject.ddc |
540 | Chemie
|
ger |
dc.title |
Seeding Layer Approach for the Synthesis of Co-ZIF-90 Thin Films of Optical Quality |
eng |
dc.type |
Article |
|
dc.type |
Text |
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dc.relation.essn |
1528-7505 |
|
dc.relation.issn |
1528-7483 |
|
dc.relation.doi |
https://doi.org/10.1021/acs.cgd.2c00664 |
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dc.bibliographicCitation.issue |
12 |
|
dc.bibliographicCitation.volume |
22 |
|
dc.bibliographicCitation.firstPage |
7008 |
|
dc.bibliographicCitation.lastPage |
7020 |
|
dc.description.version |
publishedVersion |
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tib.accessRights |
frei zug�nglich |
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