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Color of GNR suspensions of different surface chemistry after mixing with Mueller–Hinton broth for 24 h.
Note: The red arrow indicates the color change of PAH-GNR from brown to blue upon mixing with the media.
Abbreviations: GNR, gold nanorods; PAA, polyacrylic acid; PAH, polyallylamine hydrochloride; PEG, polyethylene glycol.
