Fig. 2

Characterization of DNA release process. a Fluorescent images of LbL films immersed in buffer without (control group) and with (experiment group, 500 mW) resonator stimuli, observed at 0, 10 and 30 min. b QCM frequency recovery during DNA release. Release effectiveness was observed from baseline changing each time after 10 min treatment. The exponential fit has a correlation coefficient of 0.973. c SEM images of bare glass (blank) and LbL films before (0 min) and after (60 min and 90 min) resonator stimuli