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. Author manuscript; available in PMC: 2013 Apr 24.
Published in final edited form as: Small. 2011 Aug 5;7(19):2775–2785. doi: 10.1002/smll.201100651

Figure 2. Behavior of the SWNT-GSH reaction.

Figure 2

(a) Time-dependence of GSH depletion induced by purified SWNTs (329 m2/g). Long time constants indicate chemical reaction rather than physical adsorption. The first order rate expression: -d[GSH]/dt = k [GSH] [CNT] (dashed lines) give a rate constant k = 0.0084 ml/mg-min or 1.68*10−3 M−1s−1; (b,c) Reversibility - GSH can be regenerated by post-reaction addition of reducing agent β-NADPH (4.5 mM) and enzyme glutathione reductase (GR, 0.5 unit/ml).