It′s a keeper! A dual near-infrared (NIR)- and pH-responsive system for the controlled catch-and-release of cells was achieved using graphene/Au nanorods as a substrate and double-stranded DNA as a switchable linker for cell immobilization (see scheme). This substrate was shown to respond to cycles of NIR light and changes in pH, and released undamaged cells from the surface.
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Li et al. (2013) studied this question.
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