Improvements in electrostatic force microscopy now make it possible to measure the dielectric constant of isolated low-polarizable nanoparticles and viruses, thus enabling the label-free identification of dielectric nanomaterials of similar morphology.
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Sahagún, E., Sáenz, J. Polarizability reveals identity. Nature Mater 11, 748–749 (2012). https://doi.org/10.1038/nmat3410
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DOI: https://doi.org/10.1038/nmat3410
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