Desorption Kinetics of ssDNA From SWNTs

We have studied the kinetics of desorption of single strand DNA oligomers from colloidal dispersed singlewall carbon nanotubes by fluorescence spectroscopy. We do so by monitoring the rate of desorption from SWNTs after submitting an equilibrated ssDNA-SWNT suspension to a concentration step by which excess ssDNA is removed from the suspension. The concentration of desorbed ssDNA is determined using fluorescence from a marker attached to the ssDNA.