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. 2017 Aug 31;7:10165. doi: 10.1038/s41598-017-10533-5

Figure 4.

Figure 4

Optical imaging and representative Raman spectra (λ = 532 nm) of BP deposited over glass substrate with (A) 0 day, (B) 3 days and (C) 15 days of exposure to ambient conditions.