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. 2014 Sep 8;15(5):055004. doi: 10.1088/1468-6996/15/5/055004

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© 2014 National Institute for Materials Science

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Figure 2. — Raman spectra of (a) pristine and KNO₃-doped SLG, (c) pristine and KNO₃-doped BLG and (e) Pristine and KNO₃-doped TLG. (b), (d) and (f) depict the absence of D peak of pristine and KNO₃-doped SLG, BLG and TLG, respectively. The colors coding of panels a, c and e are same as panel b, d and f, respectively.