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 -