Thermo-mechanical effects and photo-induced release of liposome-encapsulated nanodiamonds by polarization-resolved laser pulses

Herein is proposed a polarization-resolved superposition of laser pulses to induce photo-energy transfer and optical damage. Photo-thermal and thermo-mechanical processes as a function of time exposure in nanodiamonds encapsulated in liposomes were analyzed by a nanosecond two-wave mixing method. The encapsulation of the studied nanoparticles was carried out by a lipid film hydration method. Evolution of sedimentation effects and release by ablation of the samples were evaluated. Third-order nonlinear optical properties were explored at 532 nm wavelength, and thermal phenomena seem to be responsible for a strong optical Kerr effect exhibited by the nanostructures. Mechano-optical effects were considered to be correlated with heat propagation and with the precipitation of the samples working as nano-vehicles. It is highlighted that a two-wave mixing configuration can represent immediate applications for thermal monitoring and dynamical ablation techniques in nanomedical sciences.