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 -