Fig. 2From: Seed-Mediated Synthesis of Tunable-Aspect-Ratio Gold Nanorods for Near-Infrared Photoacoustic ImagingMorphology and aspect ratio statistics of AuNRs with different AA dosages: a–d SEM and histogram, a Rod1, b Rod2, c Rod3, and d Rod4. e The line chart of AA dosage corresponding to the aspect ratio. f The UV-vis absorption spectra of different AuNRsBack to article page