Carbon-dot-based nanosensors are prepared through sequentially assembling a polymer/carbon dot multilayer shell on mesoporous silica nanoparticles with different crosslinking densities of disulfide bonds; they can be utilized to evaluate the gluthathione (GSH) concentration. In vitro cell assays demonstrate the feasibility of using such nanosensors in evaluating the intracellular redox state of different cells.
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Liu et al. (2015) studied this question.
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