Influencing the coupling between network building blocks in CdSe/CdS dot/rod aerogels by partial cation exchange

verfasst von

Pascal Rusch, Franziska Lübkemann-Warwas, Hadir Mahmoud Abdelghaffar Moustafa Borg, Jan Gerrit Eckert, Dirk Dorfs, Nadja-Carola Bigall

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.

Organisationseinheit(en)

AG Funktionale Nanostrukturen aus assemblierten kolloidalen Nanopartikeln
Institut für Physikalische Chemie und Elektrochemie
PhoenixD: Simulation, Fabrikation und Anwendung optischer Systeme
Laboratorium für Nano- und Quantenengineering
Hannover School for Nanotechnology

Typ

Artikel

Journal

Journal of Chemical Physics

Band

156

ISSN

0021-9606

Publikationsdatum

15.06.2022

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Physik und Astronomie (insg.), Physikalische und Theoretische Chemie

Elektronische Version(en)

https://doi.org/10.1063/5.0093761 (Zugang: Offen)