title: Photoisomerisation and ligand-controlled reversible aggregation of azobenzene-functionalised gold nanoparticles.
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.
authors: Institute of Physical Chemistry, Christian-Albrechts-University Kiel, Olshausenstr. 40, D-24098 Kiel, Germany. temps@phc.uni-kiel.de.
authors: Anja
authors: A
authors: Köhntopp
authors: Alexandra
authors: A
authors: Dabrowski
authors: Michal
authors: M
authors: Malicki
authors: Friedrich
authors: F
authors: Temps
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D007536:Isomerism; D008024:Ligands; D053768:Metal Nanoparticles / Q000737:chemistry*; D055668:Photochemical Processes
chemical_list: D001391:Azo Compounds; D008024:Ligands; D006046:Gold; C009850:azobenzene