High-throughput detection of immobilized plasmonic nanoparticles by a hyperspectral imaging system based on Fourier transform spectrometry.

To facilitate the application of plasmonic nanoparticles (PNPs) in high-throughput detection, we develop a hyperspectral imaging system (HSIS) combining dark-filed microscopy and imaging Fourier transform spectrometry to measure scattering spectra from immobilized PNPs. The current setup has acquisition time of 5 seconds and spectral resolution of 21.4 nm at 532.1 nm. We demonstrate the applicability of the HSIS in conjunction with spectral data analysis to quantify multiple types of PNPs and detect small changes in localized surface plasmon resonance wavelengths of PNPs due to changes in the environmental refractive index.

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