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Photoacoustic study on the suspension of MZF@sil@Au-MBA+MMC nanoshells with a ferrite concentration of 0.64 mmol(f.u.) L−1. (a) PAI study: (i) A scheme showing the experimental setup—a cross-section of the tube filled with the suspension, (ii) an ultrasound image of the tube with the nanoshells, and (iii) a photoacoustic image of the same tube obtained at 680-nm excitation; (b) photoacoustic spectrum of the MZF@sil@Au-MBA+MMC nanoshells.
