Details
| Original language | English |
|---|---|
| Article number | 2300408 |
| Journal | Advanced materials interfaces |
| Volume | 10 |
| Issue number | 35 |
| Publication status | Published - 13 Dec 2023 |
Abstract
Since their discovery, cadmium chalcogenide nanoplatelets (NPLs) gained a lot of interest, not only due to their beneficial characteristic, but also because of their high affinity to self-assemble into ordered stacks. Interestingly, the stacks showed both the properties of the single NPLs and new collective features, such as charge carrier transport within the stacks. Until now, the stacking was, to the best of the knowledge, only performed in non-polar media mostly through the addition of antisolvents with higher polarity. Due to the fact, that many applications (e.g., photocatalysis) or procedures (such as gelation) occur in water, a route to self-assemble stacks directly in aqueous solution is needed. In this work a new synthesis route is thus introduced to produce stacks directly in aqueous media. The NPLs are phase transferred with mercaptocarboxylic acids to an aqueous KOH solution followed by an addition of less polar antisolvents to initialize the stacking (e.g., tetrahydrofuran). Furthermore, a mechanism of the stacking as well as four possible driving forces involved in the process are proposed supported by transmission electron microscopy, dynamic light scattering, infrared spectroscopy, and x-ray photoelectron spectroscopy measurements.
Keywords
- aqueous media, nanoplatelets, self-assembly, stacking
ASJC Scopus subject areas
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Advanced materials interfaces, Vol. 10, No. 35, 2300408, 13.12.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Self-Assembly of Semiconductor Nanoplatelets into Stacks Directly in Aqueous Solution
AU - Graf, Rebecca T.
AU - Tran, Kevin
AU - Rosebrock, Marina
AU - Borg, Hadir
AU - Schlenkrich, Jakob
AU - Lübkemann-Warwas, Franziska
AU - Renz, Franz
AU - Dorfs, Dirk
AU - Bigall, Nadja C.
N1 - Funding Information: This work was supported by the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) under Germany's excellence strategy within the cluster of excellence PhoenixD (EXC 2122, project ID 390833453) and the grand BI 1708/4‐3. R.T.G. and K.T. thank the Hannover School for Nanotechnology (hsn) for funding. D.D. would like to acknowledge the support by the German Research foundation (DFG research Grant DO 1580/5‐1). The authors are thankful to the Laboratory of Nano and Quantum Engineering (LNQE) for providing the TEM facilities. Furthermore, the authors thank the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) for funding the XPS facilities (INST 187/789‐1).
PY - 2023/12/13
Y1 - 2023/12/13
N2 - Since their discovery, cadmium chalcogenide nanoplatelets (NPLs) gained a lot of interest, not only due to their beneficial characteristic, but also because of their high affinity to self-assemble into ordered stacks. Interestingly, the stacks showed both the properties of the single NPLs and new collective features, such as charge carrier transport within the stacks. Until now, the stacking was, to the best of the knowledge, only performed in non-polar media mostly through the addition of antisolvents with higher polarity. Due to the fact, that many applications (e.g., photocatalysis) or procedures (such as gelation) occur in water, a route to self-assemble stacks directly in aqueous solution is needed. In this work a new synthesis route is thus introduced to produce stacks directly in aqueous media. The NPLs are phase transferred with mercaptocarboxylic acids to an aqueous KOH solution followed by an addition of less polar antisolvents to initialize the stacking (e.g., tetrahydrofuran). Furthermore, a mechanism of the stacking as well as four possible driving forces involved in the process are proposed supported by transmission electron microscopy, dynamic light scattering, infrared spectroscopy, and x-ray photoelectron spectroscopy measurements.
AB - Since their discovery, cadmium chalcogenide nanoplatelets (NPLs) gained a lot of interest, not only due to their beneficial characteristic, but also because of their high affinity to self-assemble into ordered stacks. Interestingly, the stacks showed both the properties of the single NPLs and new collective features, such as charge carrier transport within the stacks. Until now, the stacking was, to the best of the knowledge, only performed in non-polar media mostly through the addition of antisolvents with higher polarity. Due to the fact, that many applications (e.g., photocatalysis) or procedures (such as gelation) occur in water, a route to self-assemble stacks directly in aqueous solution is needed. In this work a new synthesis route is thus introduced to produce stacks directly in aqueous media. The NPLs are phase transferred with mercaptocarboxylic acids to an aqueous KOH solution followed by an addition of less polar antisolvents to initialize the stacking (e.g., tetrahydrofuran). Furthermore, a mechanism of the stacking as well as four possible driving forces involved in the process are proposed supported by transmission electron microscopy, dynamic light scattering, infrared spectroscopy, and x-ray photoelectron spectroscopy measurements.
KW - aqueous media
KW - nanoplatelets
KW - self-assembly
KW - stacking
UR - http://www.scopus.com/inward/record.url?scp=85170680129&partnerID=8YFLogxK
U2 - 10.1002/admi.202300408
DO - 10.1002/admi.202300408
M3 - Article
AN - SCOPUS:85170680129
VL - 10
JO - Advanced materials interfaces
JF - Advanced materials interfaces
SN - 2196-7350
IS - 35
M1 - 2300408
ER -