Figure 5.

Optical absorption of PbS nanoparticles created by femtosecond laser at different times. Left: sample irradiated with 40 mW, Right: sample irradiated with 10 mW. (a) 100 days after the initial irradiation, (b) 50 days after the initial irradiation and (c) just after the initial irradiation.

Chahadih et al. Nanoscale Research Letters 2011 6:542   doi:10.1186/1556-276X-6-542
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