Movies From Our Application Note in Microscopy & Analysis

Figure 2 shows four frames from movie at the indicated times (reference the time stamp on the video, not the player ). The full movie, however, was collected over a period of about 12 minutes at a rate of 0.48 frames per second. The movie is being played back here at 4X the acquisition rate (i.e. 1.92 fps). Note the two CTAB grains of opposite row orientation (upper-left and lower-right) bounded on the left and right by two grains with parallel orientation. Over time, the two grains narrow at their boundary, eventually separating and drifting apart while the adjacent grains on the left and right merge together. Note the three different row orientations, corresponding to the three directions perpendicular to the HOPG symmetry axes.

Figure 3 shows four frames from this movie. The full movie, however, was collected over a period of about 6 minutes at a rate of 0.95 frames per second. The movie is being played back here at 4X the acquisition rate (i.e. 3.8 fps). The video shows small features that seem to absorb into surrounding grains. The process appears analogous to Ostwald ripening, except in this two-dimensional system instead of a bulk dispersion. In both cases, the feature appears with higher contrast and appears less structured than the surrounding hemimicelles.