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. 2018 Jan 31;115(7):E1391–E1400. doi: 10.1073/pnas.1714748115

Fig. 7.

Fig. 7.

Encapsulation and release of a model dye using light-enabled reversible self-assembly of PMAMC-capped Au NPs. (A) Stepwise representation of encapsulation and release of RhB molecules by capitalizing on the light-enabled reversible self-assembly of PMAMC-capped Au NPs (c = 8.3 μM) in release process R1. (B) UV−vis spectra of released RhB molecules in release process R1 as a function of 254-nm UV light irradiation time. (C) Release kinetics of RhB molecules in release processes R1–R5 at various times of 254-nm UV light irradiation. (D) Controlled release of RhB molecules in release process R6 with multiple 254-nm UV light on/off cycles. The release ratio as a function of time was determined from the absorbance intensity at 550 nm of supernatant with the saturated intensity in R1 taken as 100%.