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- W4318250470 abstract "Abstract Many single-molecule investigations are performed in fluidic environments, e.g., to avoid unwanted consequences of contact with surfaces. Diffusion of molecules in this arrangement limits the observation time and the number of collected photons, thus, compromising studies of processes with fast or slow dynamics. Here, we introduce a planar optofluidic antenna (OFA), which enhances the fluorescence signal from molecules by about 5 times per passage, leads to about 7-fold more frequent returns to the observation volume, and significantly lengthens the diffusion time within one passage. We use single-molecule multi-parameter fluorescence detection (sm-MFD), fluorescence correlation spectroscopy (FCS) and Förster resonance energy transfer (FRET) measurements to characterize our OFAs. The antenna advantages are showcased by examining both the slow (ms) and fast (50μs) dynamics of DNA four-way (Holliday) junctions with real-time resolution. The FRET trajectories provide evidence for the absence of an intermediate conformational state and introduce an upper bound for its lifetime. The ease of implementation and compatibility with various microscopy modalities make OFAs broadly applicable to a diverse range of studies." @default.
- W4318250470 created "2023-01-27" @default.
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- W4318250470 date "2023-01-27" @default.
- W4318250470 modified "2023-09-27" @default.
- W4318250470 title "An optofluidic antenna for enhancing the sensitivity of single-emitter measurements" @default.
- W4318250470 doi "https://doi.org/10.21203/rs.3.rs-2497202/v1" @default.
- W4318250470 hasPublicationYear "2023" @default.
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