Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 5038-5047 |
| Seitenumfang | 10 |
| Fachzeitschrift | NANOSCALE |
| Jahrgang | 12 |
| Ausgabenummer | 8 |
| Publikationsstatus | Veröffentlicht - 28 Feb. 2020 |
Abstract
Over the past decades, cation exchange reactions applied to nanoparticles have opened up synthetic pathways to nanocrystals, which were not accessible by other means before. The limitation of cation exchange on the macroscopic scale of bulk materials is given by the limited ion diffusion within the crystal structure. Lyogels or aerogels are macroscopic, highly voluminous, porous materials composed of interconnected nanoscopic building blocks and hence represent a type of bridge between the macroscopic and the nanoscopic world. To demonstrate the feasibility of cation exchange on such macroscopic nanomaterials, the cation exchange on CdSe/CdS core/shell and CdS nanorod based lyogels to Cu2-xSe/Cu2-xS and Cu2-xS and the reversible exchange back to CdSe/CdS and CdS lyogels is presented. These copper-based lyogels can also be used as an intermediate state on the way to other metal chalcogenide-based macroscopic structures. By reversed cation exchange back to cadmium an additional proof is given, that the crystal structures remain unchanged. It is shown that cation exchange reactions can also be transferred to macroscopic objects like aerogels or lyogels. This procedure additionally allows the access of aerogels which cannot be synthesized via direct destabilization of the respective colloidal solutions.
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in: NANOSCALE, Jahrgang 12, Nr. 8, 28.02.2020, S. 5038-5047.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Reversible cation exchange on macroscopic CdSe/CdS and CdS nanorod based gel networks
AU - Lübkemann, Franziska
AU - Rusch, Pascal
AU - Getschmann, Sven
AU - Schremmer, Björn
AU - Schäfer, Malte
AU - Schulz, Marcel
AU - Hoppe, Bastian
AU - Behrens, Peter
AU - Bigall, Nadja C.
AU - Dorfs, Dirk
N1 - Funding Information: The authors (N. C. B., F. L.) are grateful for financial support from the German Federal Ministry of Education and Research (BMBF) within the framework of the program NanoMatFutur, support code 03X5525. Furthermore, the project leading to these results has in part received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 Research and Innovation Program (grant agreement no 714429). The author N. C. B. thanks the DFG (research grant BI 1708/4-1). The project has in parts been funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany’s Excellence Strategy within the Cluster of Excellence PhoenixD (EXC2122). The author D. D. thanks the DFG (research grant 1580/5-1). The authors thank Prof. Caro and Prof. Feldhoff for access to a scanning electron microscope and powder X-ray diffraction measurements, as well as the Laboratorium of Nano-and Quantum Engineering for support. M. S. and M. S. thank the Hannover School for Nanotechnology for financial support.
PY - 2020/2/28
Y1 - 2020/2/28
N2 - Over the past decades, cation exchange reactions applied to nanoparticles have opened up synthetic pathways to nanocrystals, which were not accessible by other means before. The limitation of cation exchange on the macroscopic scale of bulk materials is given by the limited ion diffusion within the crystal structure. Lyogels or aerogels are macroscopic, highly voluminous, porous materials composed of interconnected nanoscopic building blocks and hence represent a type of bridge between the macroscopic and the nanoscopic world. To demonstrate the feasibility of cation exchange on such macroscopic nanomaterials, the cation exchange on CdSe/CdS core/shell and CdS nanorod based lyogels to Cu2-xSe/Cu2-xS and Cu2-xS and the reversible exchange back to CdSe/CdS and CdS lyogels is presented. These copper-based lyogels can also be used as an intermediate state on the way to other metal chalcogenide-based macroscopic structures. By reversed cation exchange back to cadmium an additional proof is given, that the crystal structures remain unchanged. It is shown that cation exchange reactions can also be transferred to macroscopic objects like aerogels or lyogels. This procedure additionally allows the access of aerogels which cannot be synthesized via direct destabilization of the respective colloidal solutions.
AB - Over the past decades, cation exchange reactions applied to nanoparticles have opened up synthetic pathways to nanocrystals, which were not accessible by other means before. The limitation of cation exchange on the macroscopic scale of bulk materials is given by the limited ion diffusion within the crystal structure. Lyogels or aerogels are macroscopic, highly voluminous, porous materials composed of interconnected nanoscopic building blocks and hence represent a type of bridge between the macroscopic and the nanoscopic world. To demonstrate the feasibility of cation exchange on such macroscopic nanomaterials, the cation exchange on CdSe/CdS core/shell and CdS nanorod based lyogels to Cu2-xSe/Cu2-xS and Cu2-xS and the reversible exchange back to CdSe/CdS and CdS lyogels is presented. These copper-based lyogels can also be used as an intermediate state on the way to other metal chalcogenide-based macroscopic structures. By reversed cation exchange back to cadmium an additional proof is given, that the crystal structures remain unchanged. It is shown that cation exchange reactions can also be transferred to macroscopic objects like aerogels or lyogels. This procedure additionally allows the access of aerogels which cannot be synthesized via direct destabilization of the respective colloidal solutions.
UR - http://www.scopus.com/inward/record.url?scp=85081153622&partnerID=8YFLogxK
U2 - 10.1039/c9nr09875e
DO - 10.1039/c9nr09875e
M3 - Article
C2 - 32067005
AN - SCOPUS:85081153622
VL - 12
SP - 5038
EP - 5047
JO - NANOSCALE
JF - NANOSCALE
SN - 2040-3364
IS - 8
ER -