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- W2094078587 abstract "Fluorescence nanosectioning within a submicron region above an interface is desirable for many disciplines in the life sciences. A drawback, however, to most current approaches is the a priori need to physically scan a sculptured point spread function in the axial dimension, which can be undesirable for optically sensitive or highly dynamic samples. Here we demonstrate a fluorescence imaging approach that can overcome the need for scanning by exploiting the position-dependent emission spectrum of fluorophores above a simple biocompatible nanostructure. To achieve this we have designed a thin metal-dielectric-coated substrate, where the spectral modification to the total measured fluorescence can be used to estimate the axial fluorophore distribution within distances of 10-150 nm above the substrate with an accuracy of up to 5-10 nm. The modeling and feasibility of the approach are verified and successfully applied to elucidate nanoscale adhesion protein and filopodia dynamics in migrating cells. It is likely that the general principle can find broader applications in, for example, single-molecule studies, biosensing, and studying fast dynamic processes." @default.
- W2094078587 created "2016-06-24" @default.
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- W2094078587 date "2013-11-25" @default.
- W2094078587 modified "2023-10-14" @default.
- W2094078587 title "Spectrally coded optical nanosectioning (SpecON) with biocompatible metal–dielectric-coated substrates" @default.
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- W2094078587 doi "https://doi.org/10.1073/pnas.1307222110" @default.
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