Figure 6.

Temperature-dependent integrated PL intensity of Ge islands grown on (a) unpatterned substrate, and (b) patterned substrate (500-nm pitch). Solid lines show the fitting with one and two activation energies for (a) unpatterned and (b) patterned (500-nm pitch) substrates, respectively.

Das et al. Nanoscale Research Letters 2011 6:416   doi:10.1186/1556-276X-6-416
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