Abstract
AbstractNanometer light and exciton sources and probes have been prepared by adding various inorganic and organic crystals and molecularly doped polymers to micropipettes and nanofabricated optical fiber tips. Specifically, a new nanotechnology, near-field photonanofabrication, has been developed, leading to a thousandfold miniaturization of immobilized Fiber Optical Chemical Sensors and to a billionfold decrease in necessary sample volume. The response time has also been shortened by a factor of at least 100. Applications of these subwavelength probes include biological single cell analysis, supertip development, Förster-energy transfer and Kasha quenching phenomena at the interface between the positionally controlled nanocrystal tip and its photoactive environment. Practically, this leads to enhanced sensitivity of optical probes, nano-optical chemical sensors and near-field exciton light sources.
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