Patent ID: 8052958

Claim:
A method for manufacturing a metal oxide hollow nanoparticle using a chemical vapor condensation process, the method comprising: preparing metal acetylacetonate as a precursor; evaporating the metal acetylacetonate at a predetermined temperature, the predetermined temperature higher than a melting point of metal acetylacetonate; transferring the evaporated metal acetylacetonate into a reaction region having a reaction temperature ranging from approximately 500° C. to approximately 1,500° C., and wherein the reaction region has a reaction pressure that is sufficiently high to induce generation of metal oxide hollow nanonparticles, the sufficiently high reaction pressure ranging from 200 mbar to 600 mbar; thermally decomposing the transferred metal acetylacetonate vapor and simultaneously inducing a reaction of the transferred metal acetylacetonate vapor with oxygen to synthesize the metal oxide hollow nanoparticles; and condensing and collecting the synthesized metal oxide hollow nanoparticles, wherein an average particle size of the synthesized metal oxide hollow nanoparticles is less than approximately 100 nm.