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. Author manuscript; available in PMC: 2011 Jan 1.
Published in final edited form as: Nano Lett. 2010 Jan;10(1):211–218. doi: 10.1021/nl903295p

Figure 4.

Figure 4

Tracking of single quantum dot emitter in an 80% glycerol solution. (A) A representative 326 step trajectory taken with 7.5 ms integration time. (B) Images of quantum dots at times of 22 ms, 0.25 s, 1.13 s, 1.68 s, and 1.96 s for images 1, 2, 3, 4, and 5, respectively. (Scale bar is 1 μm) (C) Plot of the number of photons detected for each 7.5 ms time bin over the 2.43 s track. Strong blinking events are observed where the intensity drops to zero. (D) Plots of the mean-square displacement in x, y, and z for the average of 5 different single quantum dots. A fit to the MSD for displacement r gives a diffusion coefficient of 0.2 μm2/s.