Plasmonic photothermal synthesis of ZnO microspheres on Au/SiO2 nanostructures

Plasmon resonance endows gold (Au) nanostructure with extraordinary optical and thermal properties, which can be utilized in a wide range of areas. We determined that an Au film on simple SiO2 colloidal crystals can easily generate plasmonic photothermal synthesis. To demonstrate this, ZnO local synthesis was performed. This plasmonic photothermal synthesis of ZnO is safe, simple, and environmental friendly compared to the traditional synthesis of ZnO, which requires particular conditions and complex procedures. This method shows high synthesis controllability and flexibility, which provides a potential approach for microfabrication and modification.