High-Precision Optical Excited Heaters Based on Au Nanoparticles and Water-Soluble Porphyrin

Abstract

Gold nanoparticles are widely used as local heaters under optical excitation. Hybrid molecular-plasmon nanostructures based on gold nanoparticles and water-soluble porphyrin have been developed. A colloidal solution of gold nanoparticles was obtained by laser ablation of metallic gold in water, ensuring its highest chemical purity. The hybrid nanostructures formation was performed due to the Coulomb interaction of cationic porphyrin and gold nanoparticles. The revealed functional properties of hybrid nanostructures make them promising for controllable nano-heater applications (for example, photothermal therapy). Gold nanoparticles act as heaters, whereas porphyrin serves as a fluorescent thermometer with a single optical excitation.

Beyond Color Boundaries: Pioneering Developments in Cholesteric Liquid Crystal Photonic Actuators

“…Photothermal agents can selectively absorb specific wavelengths of light and efficiently convert them into internal energy. Typical photothermal agents comprise carbon nanotubes (CNTs) [ 144 , 145 , 146 ], metallic nanoparticles [ 147 , 148 , 149 ], plasmonic nanostructures [ 150 , 151 ], and reduced graphene oxide (RGO) [ 152 , 153 , 154 ]. The photothermal agent IR788 has been previously reported [ 155 ].…”