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. Author manuscript; available in PMC: 2015 Oct 3.
Published in final edited form as: J Mater Chem B. 2014 Oct 3;2(44):7685–7693. doi: 10.1039/C4TB01436G

Fig. 3.

Fig. 3

The CAS-CPT conjugated nanoparticle constructs show excellent stability and photo-triggered release. (a) Scheme for conjugation of CAS-CPT on silica NPs. (b) Release of CPT monitored over time after 10 mins of UV light exposure (365 nm, 2.5 mW/cm2) using fluorescence spectroscopy. (c) Release of CPT measured after varying times of UV light exposure (0 – 20 mins). Measurements were acquired 24 hrs after UV exposure, using absorption spectroscopy (top) and fluorescence spectroscopy (bottom, λex = 368 nm). (d) Absorbance spectra measured over 21 days in the absence of UV exposure (black & red), followed by 10-min UV irradiation after 21 days (blue).