Precise and Controllable Assembly of Silver Nanolines under the Dual-Energy Irradiation of Ultraviolet and Heat

Precise and controllable assembly of silver nanoparticles (AgNPs) has a wide range of applications in many aspects, such as electricity, medicine, and so on. However, there are not many relevant reports at present because most of them focus on the study of various forms and the stringent reaction conditions of silver nanoparticles. Here, we used gentle methods with dual-energy irradiation of ultraviolet (UV) and heat to precisely assemble the silver nanoparticles in the electrospun nanofiber films. It was found that the heat irradiation would promote the uniform distribution and growth of AgNPs in the nanofibers, while UV irradiation would cause the directional arrangement of the silver nanocrystals. Therefore, by combining the dual-energy irradiation on AgNPs in the nanofibers, we successfully prepared the assembled silver nanolines (AgNLs) with “chain”, “bundle”, and “fringe” shaped architectures and demonstrated the assembly mechanism of these structures through the interface characterization of silver nanoparticles.