A three-dimensional assay based on genetically engineered viral nanoparticles and nickel nanohairs can detect much lower levels of protein markers associated with heart attacks than conventional assays.
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Donath, E. Viruses for ultrasensitive assays. Nature Nanotech 4, 215–216 (2009). https://doi.org/10.1038/nnano.2009.64
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DOI: https://doi.org/10.1038/nnano.2009.64
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