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A new sensor made of a sub‐wavelength optical‐fiber array is shown. On page 7462, Q. Gong, Y.‐F. Xiao, and co‐workers report that such a tiny optical device can detect and size single nanoscale particles, owing to its high sensitivity and real‐time response ability. This simple and promising design may facilitate important applications, such as early‐stage biomedical diagnostics, process control of...
Single‐nanoparticle detection and sizing is demonstrated using a nanofiber pair in an aqueous environment. The sizing of nanoparticles with a single radius (100 nm) and of mixed nanoparticles with different radii (100 nm and 170 nm) are both realized, and the experimental results agree well with predictions of Rayleigh–Gans scattering, by taking the inhomogeneous field distribution of the nanofibers...
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