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. 2017 Apr 10;3:16086. doi: 10.1038/micronano.2016.86

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Copyright © 2017 The Author(s)

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Experimental setup. (a) A microfluidic chamber containing surface immobilized NP-liposomes was mounted in a darkfield microscope with ratiometric imaging capability. (b) Spectrum of a near-field coupled NP dimer (plasmon ruler) and spectral range of the bandpass filters for the monitored intensity channels I(λ₁) and I(λ₂). (c) Total intensity (I(λ₁)+I(λ₂)) distribution of NP-liposomes with different numbers of encapsulated NPs. NP, nanoparticle.