Details
| Original language | English |
|---|---|
| Article number | 2101628 |
| Journal | Advanced functional materials |
| Volume | 31 |
| Issue number | 41 |
| Early online date | 1 Jun 2021 |
| Publication status | Published - 7 Oct 2021 |
Abstract
In this work, mixing and co-gelation of Au nanoparticles (NPs) and highly luminescent CdSe/CdS core/shell nanorods (NRs) are used as tools to obtain noble metal particle-decorated macroscopic semiconductor gel networks. The hybrid nature of the macrostructures facilitates the control over the optical properties: while the holes are trapped in the CdSe cores, the connected CdSe/CdS NRs support the mobility of excited electrons throughout the porous, hyperbranched gel networks. Due to the presence of Au NPs in the mixed gels, electron trapping in the gold NPs leads to a suppressed radiative recombination, namely, quenches the fluorescence in certain fragments of the multicomponent gel. The extent of fluorescence quenching can be influenced by the quantity of the noble metal domains. The optical properties are monitored as a function of the NR:NP ratio of a model system CdSe/CdS:Au. By this correlation, it demonstrates that the spatial extent of quenching initiated by a single Au NP exceeds the dimensions of one NR, which the Au is connected to (with a length of 45.8 nm ± 4.1 nm) and can reach the number of nine NRs per Au NP, which roughly corresponds to 400 nm of total electron travel distance within the network structure.
Keywords
- aerogels, hydrogels, mixing, multicomponent, nanoparticles, noble metals, semiconductors
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Advanced functional materials, Vol. 31, No. 41, 2101628, 07.10.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Spatial Extent of Fluorescence Quenching in Mixed Semiconductor-Metal Nanoparticle Gel Networks
AU - Rosebrock, Marina
AU - Zámbó, Dániel
AU - Rusch, Pascal
AU - Pluta, Denis
AU - Steinbach, Frank
AU - Bessel, Patrick
AU - Schlosser, Anja
AU - Feldhoff, Armin
AU - Hindricks, Karen D.J.
AU - Behrens, Peter
AU - Dorfs, Dirk
AU - Bigall, Nadja C.
N1 - Funding Information: The authors thank the European Research Council (ERC) under the European Union's Horizon 2020 research and innovation program (grant agreement No 714429) for funding. In addition, 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 1708/4‐1. P.B. is thankful for financial support from the Hannover School for Nanotechnology (HSN). D.D. would like to acknowledge the support by the German Research Foundation (DFG research Grant DO 1580/5‐1). Moreover, the authors thank Prof. Denis Gebauer for providing the ICP‐OES facility at the Institute of Inorganic Chemistry (LUH) and Kirsten Eiben for the technical assistance. Prof. Peter Behrens would like to thank the Cluster of Excellence EXC 1077/1 “Hearing4all” funded by DFG.
PY - 2021/10/7
Y1 - 2021/10/7
N2 - In this work, mixing and co-gelation of Au nanoparticles (NPs) and highly luminescent CdSe/CdS core/shell nanorods (NRs) are used as tools to obtain noble metal particle-decorated macroscopic semiconductor gel networks. The hybrid nature of the macrostructures facilitates the control over the optical properties: while the holes are trapped in the CdSe cores, the connected CdSe/CdS NRs support the mobility of excited electrons throughout the porous, hyperbranched gel networks. Due to the presence of Au NPs in the mixed gels, electron trapping in the gold NPs leads to a suppressed radiative recombination, namely, quenches the fluorescence in certain fragments of the multicomponent gel. The extent of fluorescence quenching can be influenced by the quantity of the noble metal domains. The optical properties are monitored as a function of the NR:NP ratio of a model system CdSe/CdS:Au. By this correlation, it demonstrates that the spatial extent of quenching initiated by a single Au NP exceeds the dimensions of one NR, which the Au is connected to (with a length of 45.8 nm ± 4.1 nm) and can reach the number of nine NRs per Au NP, which roughly corresponds to 400 nm of total electron travel distance within the network structure.
AB - In this work, mixing and co-gelation of Au nanoparticles (NPs) and highly luminescent CdSe/CdS core/shell nanorods (NRs) are used as tools to obtain noble metal particle-decorated macroscopic semiconductor gel networks. The hybrid nature of the macrostructures facilitates the control over the optical properties: while the holes are trapped in the CdSe cores, the connected CdSe/CdS NRs support the mobility of excited electrons throughout the porous, hyperbranched gel networks. Due to the presence of Au NPs in the mixed gels, electron trapping in the gold NPs leads to a suppressed radiative recombination, namely, quenches the fluorescence in certain fragments of the multicomponent gel. The extent of fluorescence quenching can be influenced by the quantity of the noble metal domains. The optical properties are monitored as a function of the NR:NP ratio of a model system CdSe/CdS:Au. By this correlation, it demonstrates that the spatial extent of quenching initiated by a single Au NP exceeds the dimensions of one NR, which the Au is connected to (with a length of 45.8 nm ± 4.1 nm) and can reach the number of nine NRs per Au NP, which roughly corresponds to 400 nm of total electron travel distance within the network structure.
KW - aerogels
KW - hydrogels
KW - mixing
KW - multicomponent
KW - nanoparticles
KW - noble metals
KW - semiconductors
UR - http://www.scopus.com/inward/record.url?scp=85107353107&partnerID=8YFLogxK
U2 - 10.1002/adfm.202101628
DO - 10.1002/adfm.202101628
M3 - Article
AN - SCOPUS:85107353107
VL - 31
JO - Advanced functional materials
JF - Advanced functional materials
SN - 1616-301X
IS - 41
M1 - 2101628
ER -