title: Four-color fluorescence correlation spectroscopy realized in a grating-based detection platform.
abstract: We have developed a filterless multicolor detection unit for fluorescence correlation spectroscopy (FCS). This grating-based setup is continuously tunable for multicolor separation and is thus a powerful alternative to the classical cascade of dichroic mirrors and filters. Our tailored platform allows for accommodation of up to 15 detection channels covering the entire visible spectral range. As a proof of principle, we successfully demonstrate simultaneous FCS of four distinct fluorescent quantum dot species being mixed in aqueous solution. Grating-based detection allows for spectral high-resolution FCS in a stable and compact setup and is a feasible tool for quantitative investigation of complexbiomolecular dynamics on a single molecule level.
authors.affiliation: Biophysics Institute/BioTec, Dresden University of Technology, Tatzberg 47-51, 01307 Dresden, Germany. markus.burkhardt@biotec.tudresden.de
authors.forename: Markus
authors.initials: M
authors.lastname: Burkhardt
authors.forename: Katrin G
authors.initials: KG
authors.lastname: Heinze
authors.forename: Petra
authors.initials: P
authors.lastname: Schwille
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D005240:Feasibility Studies; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000295:instrumentation* / Q000379:methods; D018613:Microscopy, Confocal / Q000295:instrumentation* / Q000379:methods; D036641:Microscopy, Fluorescence, Multiphoton / Q000295:instrumentation* / Q000379:methods; D012031:Refractometry / Q000295:instrumentation* / Q000379:methods; D013050:Spectrometry, Fluorescence / Q000295:instrumentation* / Q000379:methods