Details
| Original language | English |
|---|---|
| Article number | 234701 |
| Journal | Journal of Chemical Physics |
| Volume | 156 |
| Issue number | 23 |
| Early online date | 26 May 2022 |
| Publication status | Published - 15 Jun 2022 |
Abstract
The assembly of CdSe/CdS dot/rod nanocrystals (NCs) with variable length of ZnS tips into aerogel networks is presented. To this end, a partial region selective cation exchange procedure is performed replacing Cd by Zn starting at the NC tip. The produced aerogel networks are investigated structurally and optically. The networks of tip-to-tip connected NCs have an intricate band structure with holes confined to the CdSe cores while electrons are delocalized within the CdS also within connected building blocks. However, the ZnS tips act as a barrier of variable length and strength between the NC building blocks partly confining the electrons. This results in NC based aerogel networks with tunable strength of coupling between building blocks.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- General Physics and Astronomy
- Chemistry(all)
- Physical and Theoretical Chemistry
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In: Journal of Chemical Physics, Vol. 156, No. 23, 234701, 15.06.2022.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Influencing the coupling between network building blocks in CdSe/CdS dot/rod aerogels by partial cation exchange
AU - Rusch, Pascal
AU - Lübkemann-Warwas, Franziska
AU - Borg, Hadir Mahmoud Abdelghaffar Moustafa
AU - Eckert, Jan Gerrit
AU - Dorfs, Dirk
AU - Bigall, Nadja-Carola
N1 - Funding information: This project was funded by the European Research Council (ERC) under the European Union’s Horizon 2020 Research and Innovation Program (Grant Agreement No. 714429). N.C.B. and D.D. would like to thank the German Research Foundation (DFG) for funding under Germany’s excellence strategy within the cluster of excellence PhoenixD (EXC 2122, Project No. 390833453). J.G.E. acknowledges the Ministry for Science and Culture of Lower Saxony (MWK)—School for Additive Manufacturing SAM for financial support. The authors thank the Laboratory of Nano and Quantum Engineering (LNQE) for providing the TEM facility and Professor Feldhoff of the Leibniz Universität Hannover for providing the SEM facility. The authors also would like to thank Dr. Sara Sanchez-Paradinas and Patrick Adel for assistance.
PY - 2022/6/15
Y1 - 2022/6/15
N2 - The assembly of CdSe/CdS dot/rod nanocrystals (NCs) with variable length of ZnS tips into aerogel networks is presented. To this end, a partial region selective cation exchange procedure is performed replacing Cd by Zn starting at the NC tip. The produced aerogel networks are investigated structurally and optically. The networks of tip-to-tip connected NCs have an intricate band structure with holes confined to the CdSe cores while electrons are delocalized within the CdS also within connected building blocks. However, the ZnS tips act as a barrier of variable length and strength between the NC building blocks partly confining the electrons. This results in NC based aerogel networks with tunable strength of coupling between building blocks.
AB - The assembly of CdSe/CdS dot/rod nanocrystals (NCs) with variable length of ZnS tips into aerogel networks is presented. To this end, a partial region selective cation exchange procedure is performed replacing Cd by Zn starting at the NC tip. The produced aerogel networks are investigated structurally and optically. The networks of tip-to-tip connected NCs have an intricate band structure with holes confined to the CdSe cores while electrons are delocalized within the CdS also within connected building blocks. However, the ZnS tips act as a barrier of variable length and strength between the NC building blocks partly confining the electrons. This results in NC based aerogel networks with tunable strength of coupling between building blocks.
UR - http://www.scopus.com/inward/record.url?scp=85132278082&partnerID=8YFLogxK
U2 - 10.1063/5.0093761
DO - 10.1063/5.0093761
M3 - Article
VL - 156
JO - Journal of Chemical Physics
JF - Journal of Chemical Physics
SN - 0021-9606
IS - 23
M1 - 234701
ER -