Investigations of ion transport through nanoscale polymer membranes by fluorescence quenching of CdSe/CdS quantum dot/quantum rods. Issue 14 (18th March 2016)

• Record Type: Journal Article
• Authors: Merkl, Jan-Philip; Wolter, Christopher; Flessau, Sandra; Schmidtke, Christian; Ostermann, Johannes; Feld, Artur; Mews, Alf; Weller, Horst
• Is Part Of: Nanoscale. Volume 8:Issue 14(2016)
• Page Start: 7402
• Page End: 7407
• Publication Date: 2016-03-18
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/c5nr08318d
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : Fluorescence quenching assays allow detailed understanding of chemical cross-linking reactions in the polymeric ligand shell of semiconductor nanocrystals. Abstract : Detailed steady-state and time-resolved fluorescence quenching measurements give deep insight into ion transport through nanometer thick diblock copolymer membranes, which were assembled as biocompatible shell material around CdSe/CdS quantum dot in quantum rods. We discuss the role of polymer chain length, intermolecular cross-linking and nanopore formation by analysing electron transfer processes from the photoexcited QDQRs to Cu(ii ) ions, which accumulate in the polymer membrane. Fluorescence investigations on single particle level additionally allow identifying ensemble inhomogeneities.