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please pardon the reflective distortion along the right edge
STM images showing the fluctuations of islands at 620K. The edge rows of islands fluctuate the fastest, and when fluctuations at one's two ends cross, the row disappears. Due to the sticking anisotropy, it is then difficult to nucleate a new row, and the island shrinks. Note that the small lower right hand island disappears all together. Size= 350 × 350 Å Frame Rate= 1/32min.
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Copyright 1996 by the Regents of the University of Minnesota