Abstract
A plasmonic chip with a periodic structure coated with thin metal films was fabricated and applied to bioimaging under a fluorescence microscope. By using the enhanced electric field of surface plasmon resonance excited on the chip, an enhanced fluorescence of samples was observed by conventional fluorescence microscopy. In this study, neurons were cultured on a plasmonic chip, which was used instead of a glass-bottomed dish or cover glass; the received fluorescence images of neuron dendrites were more than four times brighter than those obtained from similar specimens cultured on a glass-bottomed dish and observed using an upright fluorescence microscope.
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