Figure 5.

PL spectra of C450, C5N1, and C450. (a) C450, C5N1, and C450 with an excitation wavelength of 220 nm. (b) C450N with different excitation wavelengths ranging from 220 to 280 nm. (c) C450, C5N1, and C450 with an excitation wavelength of 300 nm.

Ding et al. Nanoscale Research Letters 2013 8:545   doi:10.1186/1556-276X-8-545
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