Fig. 6: Optical transmission and fluorescence images of optical condensation with an optical fibre module on the substrate. | Communications Physics

Fig. 6: Optical transmission and fluorescence images of optical condensation with an optical fibre module on the substrate.

From: Highly efficient three-dimensional optical condensation of nano- and micro-particles using a gold-coated optical fibre module

Fig. 6

a Optical transmission image of 1 μm polystyrene particles 60 s after laser irradiation. Fluorescence images of b 1 μm polystyrene particles (4.55 × 107 particles/mL), and (c, d) 2 μm polystyrene particles at concentrations of c 5.68 × 106 and d 4.55 × 107 particles/mL, acquired 60 s after laser irradiation. Here, green fluorescent objects indicate a 1 μm polystyrene particles and b–e 2 μm polystyrene particles. e Trajectory of assembled particles from 30 s to 40 s post-laser irradiation (2 μm polystyrene particles at concentrations of 5.68 × 106 particles/mL). White numbers indicate particle locations, with red circles marking their positions at each timestamp. Average migration speeds at these locations are: (1) 13.6 ± 3.3, (2) 11.6 ± 3.4, (3) 9.8 ± 2.5, (4) 10.1 ± 0.9, (5) 6.1 ± 1.1, and 5.9 ± 1.0 μm/s, respectively (n  =  3 independent experiments). Scale bar is 75 μm.

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