Photothermal laser heating effect of nanoparticles in biological tissues

In medical practice, there is surgical intervention for laser cartilage reshaping, important criteria of this is the viability of cells after procedure. That’s why the reducing of duration and power of laser radiation still a central problem. In present time, nanopartilcles are actively using in medicine, and one of the possible niches theirs using is an amplification of laser heating of biological tissues. In this paper, the photothermal effect of metal oxide bronze nanoparticles (NaxTiO2, KxMoO3, KxWO3, HxMoO3) observed at the heating from -10◦С to +40◦С of pig’s rib cartilage by radiation of Er-doped fiber laser with wavelength 1.56 µm has been studied. Comparison of the values of phototermal effect showed, that the most result of laser heating is observed for the samples of cartilaginous tissue impregnated by KxMoO3 nanoparticles. This paper confirms, that the amplification of laser heating of the samples impregnated by nanoparticles depends not only on photo absorption, but on nanoparticle’s diffusion into biological tissue.