Figure 6 .

Effect of laser irradiation on HNPs suspended in 2% agar gels.A) Temperature change in particles (□ 0.4,■ 2, ■ 10 and ■ 50 μgmL^-1) exposed to continuous green laser fixed at 532 nm (1.11 Watts, 7 mm beam focus) for 20, 40 and 90 s. ΔT was calculated as expressed in the Equation 1 (n = 3 ± SE). B) Representative real time temperature response curves of 50 μgmL^-1 particles irradiated for 20, 40 and 90s. * Denotes significant difference compared with 20 s irradiation data and ¤ denotes significant difference of data of HNP concentration at 50 μgmL^-1 compared with data of other concentrations of similar laser exposure (p < 0.05).