Figure 3 .

Photoluminescence spectra: 1, porous silicon (a - as-prepared, b - after 75 min of ozone treatment); 2, pure microcrystalline cellulose; 3, NCC; 4, and nanocomposite (a - as-prepared, b - after 75 min of ozone treatment).

Pikulev et al. Nanoscale Research Letters 2012 7:426   doi:10.1186/1556-276X-7-426
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