Fig. 4From: Seed-Mediated Synthesis of Tunable-Aspect-Ratio Gold Nanorods for Near-Infrared Photoacoustic ImagingRelative viabilities of Hela cells after being incubated with various concentrations of AuTR with and without PEG modified within 24 h: a histogram of relative cell viabilities and b optical microscopy images of Hela cellsBack to article page