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

authored by
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.

Organisation(s)
Section Functional nanostructures from assembled colloidal nanoparticles
Institute of Physical Chemistry and Electrochemistry
PhoenixD: Photonics, Optics, and Engineering - Innovation Across Disciplines
Laboratory of Nano and Quantum Engineering
Hannover School for Nanotechnology
Type
Article
Journal
Journal of Chemical Physics
Volume
156
ISSN
0021-9606
Publication date
15.06.2022
Publication status
Published
Peer reviewed
Yes
ASJC Scopus subject areas
Physics and Astronomy(all), Physical and Theoretical Chemistry
Electronic version(s)
https://doi.org/10.1063/5.0093761 (Access: Open)