Abstract
We present a simple, ultra-rapid and robust method to create sharp nanostructures—nanopetals—in a shape memory polymer substrate demonstrating unprecedented enhancements for surface enhanced sensing over large surface areas. These bimetallic nanostructures demonstrate extremely strong surface plasmon resonance effects due to the high density multifaceted petal structures that increase the probability of forming nanogaps. We demonstrate that our nanopetals exhibit extremely strong surface plasmons, confining the emission and enhancing the fluorescence intensity of the nearby high-quantum yield fluorescein by >4000×. The enhancements are confined to the extremely small volumes at the nanopetal borders. This enables us to achieve single molecule detection at relatively high and physiological concentrations.
Highlights
Nanoplasmonic methods utilizing metallic nanostructures that interact with fluorescent species to enhance their signals and to confine their detection volumes have been developed
Bowtie nanoantennas to facilitate detection of single molecules showed a 1,340-fold increase in fluorescence intensity of the low fluorescence quantum efficiency dyeTPQDI.8
We recently presented a simple, ultra-rapid low-cost method to create large scale metallic nanowrinkles on polystyrenePSsheets
Summary
Nanoplasmonic methods utilizing metallic nanostructures that interact with fluorescent species to enhance their signals and to confine their detection volumes have been developed.. Bowtie nanoantennas to facilitate detection of single molecules showed a 1,340-fold increase in fluorescence intensity of the low fluorescence quantum efficiency dyeTPQDI.. Bowtie nanoantennas to facilitate detection of single molecules showed a 1,340-fold increase in fluorescence intensity of the low fluorescence quantum efficiency dyeTPQDI.8 These nanoplasmonic structures are produced by expensive and sophisticated nanofabrication techniques.. We recently presented a simple, ultra-rapid low-cost method to create large scale metallic nanowrinkles on polystyrenePSsheets.. We recently presented a simple, ultra-rapid low-cost method to create large scale metallic nanowrinkles on polystyrenePSsheets.9 These tunable wrinkles can be integrated into microchannels.. Nanofeatures, including the shape of the nanostructures and the dimension of the resulting gaps between them, deter-
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