Supramolecular Gelation of Cadmium Oleate in the Synthesis of Nanocrystals for Applications in Photonics and Optoelectronics
| Author(s) | Welsch, Tory A. | |
| Author(s) | Cleveland, Jill M. | |
| Author(s) | Thomas, Jessica A. | |
| Author(s) | Schyns, ZoƩ Odile Georgette | |
| Author(s) | Korley, LaShanda T. J. | |
| Author(s) | Doty, Matthew F. | |
| Date Accessioned | 2024-08-05T17:43:08Z | |
| Date Available | 2024-08-05T17:43:08Z | |
| Publication Date | 2024-05-22 | |
| Description | This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Nano Materials, copyright Ā© 2024 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acsanm.4c01839. This article will be embargoed until 05/22/2025. | |
| Abstract | Cadmium oleate is widely used as a cation precursor in the synthesis of cadmium chalcogenide nanocrystal quantum dots (QDs) for a broad range of photonic and optoelectronic applications. Cd oleate can noncovalently assemble to form a supramolecular coordination gel, or metallogel, in solvents commonly used to disperse oleate-capped QDs. The gelation severely impedes the purification of oleate-capped QDs from excess Cd oleate, resulting in a gelled product that cannot be reliably characterized or used in further synthesis reactions. Here, we investigate the Cd oleate gel to gain insights into its viscoelastic properties and behavior under conditions relevant to QD synthesis, purification, and storage. We then examine how to effectively mitigate gelation by adding oleylamine as an additional ligand to disrupt noncovalent assembly. We synthesize PbS/CdS core/shell QDs via cation exchange as a case study to illustrate gelation of the reaction product and further demonstrate how this issue can be resolved through a better understanding of the supramolecular gel. | |
| Sponsor | The authors acknowledge support from the Delaware Energy Institute. T.A.W. and J.M.C. acknowledge support from the Delaware Space Grant College and Fellowship program (NASA Grant 80NSSC20M0045). M.F.D. and L.T.J.K. acknowledge partial support from the NSF through the University of Delaware Materials Research Science and Engineering Center (MRSEC), DMR-2011824, including partial support of this project through the MRSEC-affiliated Partnership for Research and Education (PREM) in Soft Matter Research & Technology and Quantum Confinement Materials Design (SMaRT QD), DMR-2122158. | |
| Citation | Welsch, Tory A., Jill M. Cleveland, Jessica A. Thomas, ZoĆ© Odile Georgette Schyns, LaShanda T. J. Korley, and Matthew F. Doty. āSupramolecular Gelation of Cadmium Oleate in the Synthesis of Nanocrystals for Applications in Photonics and Optoelectronics.ā ACS Applied Nano Materials 7, no. 11 (June 14, 2024): 13319ā27. https://doi.org/10.1021/acsanm.4c01839. | |
| ISSN | 2574-0970 | |
| URL | https://udspace.udel.edu/handle/19716/34642 | |
| Language | en_US | |
| Publisher | ACS Applied Nano Materials | |
| Keywords | quantum dots | |
| Keywords | nanocrystals | |
| Keywords | material synthesis | |
| Keywords | metallogel | |
| Keywords | supramolecular assembly | |
| Keywords | impurity mitigation | |
| Title | Supramolecular Gelation of Cadmium Oleate in the Synthesis of Nanocrystals for Applications in Photonics and Optoelectronics | |
| Type | Article |
Files
Original bundle
1 - 1 of 1
No Thumbnail Available
- Name:
- Supramolecular Gelation of Cadmium Oleate in the Synthesis of Nanocrystals for Applications in Photonics and Optoelectronics.pdf
- Size:
- 2.03 MB
- Format:
- Adobe Portable Document Format
- Description:
- Main article
License bundle
1 - 1 of 1
No Thumbnail Available
- Name:
- license.txt
- Size:
- 2.22 KB
- Format:
- Item-specific license agreed upon to submission
- Description: