Nano Ping Pong Ball

Micro-and nanocapsules are widely utilized in various industries such as pesticides, cosmetics, medicines, and foods to protect and deliver internal substances as effective carriers. Typically, polymers are used to make the shell of capsules, which is fabricated by using complicated demands, e.g. temperature control, pH control, and chemical processes. In this study, we show a fabrication method for a self-encapsulated nanoshell carrier without the skilled expertise or the high-priced technical equipment. A water droplet containing high concentration of salt in an oil phase. As the water diffuses into the oil, the salt concentration at the water-oil interface increases and the salt crystal grows in time. Eventually, a completely encapsulated shell structure is created. Using this one-step method, we produced nanocapsules with several hundred nanometers in size. In this talk, we show how the perfect shell structure in nanometer-sized using the crystallization process which has no grain boundary. We expect that this method will bring about remarkable cost saving and process simplification in the nanocapsule production technology.