A silk fibroin composite film that can simultaneously scavenge and probe HO in situ was developed for possibly examining local concentrations of HO for biomedical applications. A multi-functional composite film (GDES) that consists of graphene oxide (G), a photothermally responsive element that was blended with polydopamine (PDA, D)/horseradish peroxidase (HRP, E) (or DE complex), and then GDE microaggregates were coated with silk fibroin (SF, S), a tyrosine-containing protein. At 37 °C, the HO-scavenging ability of a GDES film in solution at approximately 7.5 × 10 μmol HO/mg film was the highest compared with those of S and GS films. The intensities of UV-excitable blue fluorescence of a GDES film linearly increased with increasing HO concentrations from 4.0 μM to 80 μM at 37 °C. Interestingly, after a GDES film scavenged HO, the UV-excitable blue fluorescent film could be qualitatively monitored by eye, making the film an eye-probe HO sensor. A GDES film enabled to heat HO-containing samples to 37 °C or higher by the absorption of near-IR irradiation at 808 nm. The good biocompatibility of a GDES film was examined according to the requirements of ISO-10993-5. Accordingly, a GDES film was developed herein to scavenge and eye-probe HO in situ and so it has potential for biomedical applications.
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| http://dx.doi.org/10.3390/s20020366 | DOI Listing |
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