Fig. 6
Release of AS-ODN or NS-ODN following hybridization to CS-ODN attached to pristine or functionalized MWCNT. Depicted is the amount of released AS-ODN or NS-ODN following hybridization to a adsorbed or b covalently bound CS-ODN to pristine or modified MWCNT. The initial concentration of the 6-FAM-labeled AS-ODN and NS-ODN was 2 nmol/mgCNT and the released amount was determined by fluorescence measurements in the release solution (in PBS at 80 °C for 2 × 10 min). The specific activation procedures prior to the covalent binding were performed analog to Fig. 2. Non-complementary NS-ODN served as control