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Distribution of CNTs in mouse tissues. TDM images (×40 microobjective) of lung (A, B), liver (D), and heart (E) tissue. Differentiation of CNTs and melanin by chemical bleaching (C). Black arrows indicate CNTs (black color), gray arrow indicates bleached melanoma (light brown color). PT imaging reveals presence of 1.7-μm CNTs clusters in liver (F; ×100 microobjective). Laser parameters: wavelength, 800 nm; pulse energy fluence, 0.1 J/cm2.
