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. Author manuscript; available in PMC: 2015 Jun 1.
Published in final edited form as: Biomaterials. 2014 Mar 14;35(17):4729–4738. doi: 10.1016/j.biomaterials.2014.02.002

Table 2.

Maximum supernatant concentration (with loading concentration 2 mg/mL), zeta-potential in pH 7 HPLC water, isoelectric point (IEP) and D / G ratio of AR and grafted MWNTs. (The Raman spectra are presented in ESI Figure 3S.)

Sample Code Maximum supernatant
concentration in water
(µg/mL)		 Zeta-potential (mV) in
pH 7 HPLC water		 IEP D/G ratio
AR-MWNT 1.9 −10.02 ± 1.59 5.0 1.09 ± 0.03
P(MMA)-MWNT 0.5 N/A N/A 1.07 ± 0.08
P(MAA)-MWNT 29.6 −17.2 ± 1.3 4.3 1.03 ± 0.07
P(4-VP)-MWNT 32.9 −0.1 ± 6.4 7.0 1.05 ± 0.02
P(M4-VP)-MWNT 67.8 8.7 ± 2.4 9.8 1.04 ± 0.03
P(PEGMA)-MWNT 58.3 −7.8 ± 5.3 4.6 1.13± 0.09