Details
| Original language | English |
|---|---|
| Article number | 2300186 |
| Number of pages | 9 |
| Journal | Small Structures |
| Volume | 4 |
| Issue number | 12 |
| Publication status | Published - 11 Dec 2023 |
Abstract
For a long time, researchers in nanochemistry have been exploring ways to create 3D structures using cross-linked nanoparticles, such as lyogels and aerogels. In the present work, how simple modifications to the nanoparticle surface can be used to influence the resulting structure in a targeted manner is demonstrated. Specifically, positively charged surface ligands containing amine groups are compared to negatively charged ligands typically used, containing carboxylic acid groups, to generate network structures using different gelation agents. By utilizing bridging through S2− ions, a network structure of anisotropic CdSe/CdS nanorods is generated, packing them side by side at the nanoscopic level. The resulting structures exhibit improved fluorescence properties comparable to those of tip-to-tip connected networks but without harsh conditions for the nanoparticle surfaces. This innovative new method of gelation using S2− ions can achieve adequate photoluminescence quantum yields as well as prolonged fluorescence lifetimes compared to other network structures.
Keywords
- aerogels, fluorescence enhancements, ionic gelations, nanoparticles, semiconductors
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. 4, No. 12, 2300186, 11.12.2023.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Controlled Morphological Arrangement of Anisotropic Nanoparticles via Oxidation or Ionic Cross-Linking
AU - Rosebrock, Marina
AU - Graf, Rebecca T.
AU - Kranz, Daniel
AU - Christmann, Hannah
AU - Bronner, Hannah
AU - Hannebauer, Adrian
AU - Zámbó, Dániel
AU - Dorfs, Dirk
AU - Bigall, Nadja C.
N1 - Funding Information: This work received funding from 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 grant BI 1708/4-3. The authors acknowledge the cfMATCH providing the equipment for the Hg porosimetry and argon physisorption measurements. D. D. would like to acknowledge the support by the German Research Foundation (DFG research Grant DO 1580/5-1). D.K. would like to thank the Konrad–Adenauer–Stiftung (KAS) for financial support. D.Z. acknowledges the project no. FK-142148 financed by the Hungarian Scientific Research Fund (NRDI Fund) as well as the project no. TKP-2021-NKTA-05 implemented with the support provided by the Ministry of Innovation and Technology of Hungary from the National Research, Development and Innovation Fund, financed under the TKP2021 funding scheme. R.T.G. and A.H. would like to thank the Hannover School for Nanotechnology for funding. The authors would like to thank A. Feldhoff for the SEM facilities. The authors would like to thank the Laboratorium für Nano- und Quantenengineering (LNQE) for TEM facilities. Open Access funding enabled and organized by Projekt DEAL. Funding Information: This work received funding from 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 grant BI 1708/4‐3. The authors acknowledge the cfMATCH providing the equipment for the Hg porosimetry and argon physisorption measurements. D. D. would like to acknowledge the support by the German Research Foundation (DFG research Grant DO 1580/5‐1). D.K. would like to thank the Konrad–Adenauer–Stiftung (KAS) for financial support. D.Z. acknowledges the project no. FK‐142148 financed by the Hungarian Scientific Research Fund (NRDI Fund) as well as the project no. TKP‐2021‐NKTA‐05 implemented with the support provided by the Ministry of Innovation and Technology of Hungary from the National Research, Development and Innovation Fund, financed under the TKP2021 funding scheme. R.T.G. and A.H. would like to thank the Hannover School for Nanotechnology for funding. The authors would like to thank A. Feldhoff for the SEM facilities. The authors would like to thank the Laboratorium für Nano‐ und Quantenengineering (LNQE) for TEM facilities.
PY - 2023/12/11
Y1 - 2023/12/11
N2 - For a long time, researchers in nanochemistry have been exploring ways to create 3D structures using cross-linked nanoparticles, such as lyogels and aerogels. In the present work, how simple modifications to the nanoparticle surface can be used to influence the resulting structure in a targeted manner is demonstrated. Specifically, positively charged surface ligands containing amine groups are compared to negatively charged ligands typically used, containing carboxylic acid groups, to generate network structures using different gelation agents. By utilizing bridging through S2− ions, a network structure of anisotropic CdSe/CdS nanorods is generated, packing them side by side at the nanoscopic level. The resulting structures exhibit improved fluorescence properties comparable to those of tip-to-tip connected networks but without harsh conditions for the nanoparticle surfaces. This innovative new method of gelation using S2− ions can achieve adequate photoluminescence quantum yields as well as prolonged fluorescence lifetimes compared to other network structures.
AB - For a long time, researchers in nanochemistry have been exploring ways to create 3D structures using cross-linked nanoparticles, such as lyogels and aerogels. In the present work, how simple modifications to the nanoparticle surface can be used to influence the resulting structure in a targeted manner is demonstrated. Specifically, positively charged surface ligands containing amine groups are compared to negatively charged ligands typically used, containing carboxylic acid groups, to generate network structures using different gelation agents. By utilizing bridging through S2− ions, a network structure of anisotropic CdSe/CdS nanorods is generated, packing them side by side at the nanoscopic level. The resulting structures exhibit improved fluorescence properties comparable to those of tip-to-tip connected networks but without harsh conditions for the nanoparticle surfaces. This innovative new method of gelation using S2− ions can achieve adequate photoluminescence quantum yields as well as prolonged fluorescence lifetimes compared to other network structures.
KW - aerogels
KW - fluorescence enhancements
KW - ionic gelations
KW - nanoparticles
KW - semiconductors
UR - http://www.scopus.com/inward/record.url?scp=85179342876&partnerID=8YFLogxK
U2 - 10.1002/sstr.202300186
DO - 10.1002/sstr.202300186
M3 - Article
AN - SCOPUS:85179342876
VL - 4
JO - Small Structures
JF - Small Structures
IS - 12
M1 - 2300186
ER -