| abstract |
The present invention discloses a method for forming a nano-bubble wherein the method is different from the general method using water-in-oil emulsion reaction. The disclosed method comprises: providing a inorganic particle as a nucleus, coating at least a first polymer on the surface of the nucleus to form a organic/inorganic particle, extracting the nucleus of the organic/inorganic particle using a first solvent to form a solvent-containing nano-particle, performing freezing drying process to dry the extracted particles and forming a hollow nano-particles, steeping the hollow nano-particle in a second solvent, so as to form the nano-bubble. |