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(a) Illustration of a dual-functional nanoplasmonic biosensor for COVID-19 RNA analysis. Reproduced with permission from Qiu et al., ACS Nano 14, 5268 (2020). Copyright 2020 American Chemical Society. (b) Illustration of a nanophotonic bimodal waveguide interferometer for direct sensing of intact SARS-CoV-2 viruses. CoNVaT project.
