Synthesis of Porous Connected Cryoaerogel Networks from Cadmium Chalcogenide Nanoplatelet Stacks

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Original languageEnglish
Article number2300554
Number of pages11
JournalSmall Structures
Volume5
Issue number7
Publication statusPublished - 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

Cite this

Synthesis of Porous Connected Cryoaerogel Networks from Cadmium Chalcogenide Nanoplatelet Stacks. / Graf, Rebecca T.; Pluta, Denis; Hannebauer, Adrian et al.
In: Small Structures, Vol. 5, No. 7, 2300554, 08.07.2024.

Research output: Contribution to journalArticleResearchpeer review

Graf, RT, Pluta, D, Hannebauer, A, Schlenkrich, J & Bigall, NC 2024, 'Synthesis of Porous Connected Cryoaerogel Networks from Cadmium Chalcogenide Nanoplatelet Stacks', Small Structures, vol. 5, no. 7, 2300554. https://doi.org/10.1002/sstr.202300554
Graf, R. T., Pluta, D., Hannebauer, A., Schlenkrich, J., & Bigall, N. C. (2024). Synthesis of Porous Connected Cryoaerogel Networks from Cadmium Chalcogenide Nanoplatelet Stacks. Small Structures, 5(7), Article 2300554. https://doi.org/10.1002/sstr.202300554
Graf RT, Pluta D, Hannebauer A, Schlenkrich J, Bigall NC. Synthesis of Porous Connected Cryoaerogel Networks from Cadmium Chalcogenide Nanoplatelet Stacks. Small Structures. 2024 Jul 8;5(7):2300554. doi: 10.1002/sstr.202300554
Graf, Rebecca T. ; Pluta, Denis ; Hannebauer, Adrian et al. / Synthesis of Porous Connected Cryoaerogel Networks from Cadmium Chalcogenide Nanoplatelet Stacks. In: Small Structures. 2024 ; Vol. 5, No. 7.
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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.",
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AU - Graf, Rebecca T.

AU - Pluta, Denis

AU - Hannebauer, Adrian

AU - Schlenkrich, Jakob

AU - Bigall, Nadja C.

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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.

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