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Updated: Apr 26, 2026
An Optimized Protocol for the Efficient Radiolabeling of Gold Nanoparticles by Using a 125I-labeled Azide Prosthetic Group
Published on: October 10, 2016
Photoisomerisation and ligand-controlled reversible aggregation of azobenzene-functionalised gold nanoparticles
Anja Köhntopp1, Alexandra Dabrowski, Michal Malicki
1Institute of Physical Chemistry, Christian-Albrechts-University Kiel, Olshausenstr. 40, D-24098 Kiel, Germany. temps@phc.uni-kiel.de.
Abstract:
The photochemical behaviour of functionalised gold nanoparticles (AuNPs) carrying azobenzenethiolate-alkylthiolate monolayers was investigated. Repeated trans-cis and cis-trans isomerisation cycles could be performed in all cases with high efficiency. Reversible photoinduced aggregation was observed when azothiolates with long alkyl spacers (≥C7) were combined with short (C5) alkylthiolate coligands. The choice of a coligand thus offers control over the aggregation properties of the nanoparticles.
