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(a) PA response (Vpp) of LHMSiO2-AuNR at varying concentrations: 1 X (0.11nM, blue circles), 2X (0.21nM, black squares) and 3X (0.32nM, red triangles). Inset shows the same results at a broader fluence range. Error bars show 1 standard deviation in both directions to the mean Vpp. (b) Enhancement of PA signals for 2X/1X (black), 3X/2X (red) and 3X/1X(blue).
