Details
| Original language | English |
|---|---|
| Article number | 2300554 |
| Number of pages | 11 |
| Journal | Small Structures |
| Volume | 5 |
| Issue number | 7 |
| Publication status | Published - 8 Jul 2024 |
Abstract
Cadmium chalcogenide nanoplatelets (NPLs) are not only known due to their unique optical properties but also because of their ability to self-assemble into stacks with new collective properties. Only recently, a stacking process in an aqueous medium has been demonstrated, which opens up possible applications and methods such as gelation. Nanoparticle-based aerogels gain a lot of attention due to their high relative surface areas and porosity and thus, high potential for catalytic applications. Herein, the positive properties of aerogels to the NPL-stack system by cryoaerogelation of destabilized NPL dispersions are introduced. After the addition of an antisolvent to initiate the stacking, the dispersion is flash-frozen with liquid nitrogen and freeze-dried. By this method, porous cryoaerogel networks result in high surface areas and retained stacking of the NPLs. The formed stack-gels are investigated by electron microscopy and physisorption measurements. Optical and photoelectrochemical measurements verify the charge carrier transport within the stack-gel network.
Keywords
- aerogels, cryogelation, nanoplatelets, self-assembly, stacking
ASJC Scopus subject areas
- Materials Science(all)
- Engineering(all)
- Engineering (miscellaneous)
- Chemistry(all)
- Chemistry (miscellaneous)
- Energy(all)
- Energy (miscellaneous)
- Environmental Science(all)
- Environmental Science (miscellaneous)
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In: Small Structures, Vol. 5, No. 7, 2300554, 08.07.2024.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Synthesis of Porous Connected Cryoaerogel Networks from Cadmium Chalcogenide Nanoplatelet Stacks
AU - Graf, Rebecca T.
AU - Pluta, Denis
AU - Hannebauer, Adrian
AU - Schlenkrich, Jakob
AU - Bigall, Nadja C.
N1 - Publisher Copyright: © 2024 The Authors. Small Structures published by Wiley-VCH GmbH.
PY - 2024/7/8
Y1 - 2024/7/8
N2 - Cadmium chalcogenide nanoplatelets (NPLs) are not only known due to their unique optical properties but also because of their ability to self-assemble into stacks with new collective properties. Only recently, a stacking process in an aqueous medium has been demonstrated, which opens up possible applications and methods such as gelation. Nanoparticle-based aerogels gain a lot of attention due to their high relative surface areas and porosity and thus, high potential for catalytic applications. Herein, the positive properties of aerogels to the NPL-stack system by cryoaerogelation of destabilized NPL dispersions are introduced. After the addition of an antisolvent to initiate the stacking, the dispersion is flash-frozen with liquid nitrogen and freeze-dried. By this method, porous cryoaerogel networks result in high surface areas and retained stacking of the NPLs. The formed stack-gels are investigated by electron microscopy and physisorption measurements. Optical and photoelectrochemical measurements verify the charge carrier transport within the stack-gel network.
AB - Cadmium chalcogenide nanoplatelets (NPLs) are not only known due to their unique optical properties but also because of their ability to self-assemble into stacks with new collective properties. Only recently, a stacking process in an aqueous medium has been demonstrated, which opens up possible applications and methods such as gelation. Nanoparticle-based aerogels gain a lot of attention due to their high relative surface areas and porosity and thus, high potential for catalytic applications. Herein, the positive properties of aerogels to the NPL-stack system by cryoaerogelation of destabilized NPL dispersions are introduced. After the addition of an antisolvent to initiate the stacking, the dispersion is flash-frozen with liquid nitrogen and freeze-dried. By this method, porous cryoaerogel networks result in high surface areas and retained stacking of the NPLs. The formed stack-gels are investigated by electron microscopy and physisorption measurements. Optical and photoelectrochemical measurements verify the charge carrier transport within the stack-gel network.
KW - aerogels
KW - cryogelation
KW - nanoplatelets
KW - self-assembly
KW - stacking
UR - http://www.scopus.com/inward/record.url?scp=85193920012&partnerID=8YFLogxK
U2 - 10.1002/sstr.202300554
DO - 10.1002/sstr.202300554
M3 - Article
AN - SCOPUS:85193920012
VL - 5
JO - Small Structures
JF - Small Structures
IS - 7
M1 - 2300554
ER -