Figure 6 .

Decay of the luminescence at 440 nm of powder L9 after HWA treatment. At 9 K after the excitation at 266 nm was stopped. The exponential fit (solid line) gives a lifetime of about 1 s.

Gelloz et al. Nanoscale Research Letters 2012 7:382   doi:10.1186/1556-276X-7-382
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