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Thiols have a high binding affinity to noble metals and semiconductor (SC) materials. Thiol ligands enable size control and tuning of the surface during the synthesis of nanoparticles (NP), significantly influence their physico-chemical and optical properties, and allow for their bioconjugation via further functional groups. Thus, simple, inexpensive, robust, and fast methods for the quantification of thiol groups and the characterization of thiol-modified or - stabilized nanomaterials including polymers are of considerable importance.
Emissive nanoparticles (NP) are of ever increasing importance in nanotechnology, optical industries, and life sciences. Applicationrelevant properties determining particle performance and biocompatibility depend mainly on surface functional groups or ligands. Coating with polyethylene glycol (PEG) ligands enhances hydrophilicity and biocompatibility of nanomaterials, and enables subsequent binding of biomolecules. Hence, PEGylated particles must be carefully engineered and monitored with simple and fast methods.