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. Author manuscript; available in PMC: 2013 Mar 1.
Published in final edited form as: Carbon N Y. 2012 Mar 1;50(3):1303–1310. doi: 10.1016/j.carbon.2011.10.053

Figure 2.

Figure 2

Intrinsic fluorescence spectra of 100 μg/mL (a) HRP or (b) apo-HRP at the present of 0, 5, 10, 20, 30, 40 μg/mL SWCNT-COOH in 25 mM phosphate buffer (pH 7.4). (c) Stern-Volmer plots for dependence of fluorescence quenching and SWCNT-COOH concentration.