Thermodynamic Barrier to Nucleation for Manganese Oxide Nanoparticles Synthesized by High-Temperature Gas-to-Particle Conversion

A complementary experimental and modeling study is reported here for nucleation of manganese oxide nanoparticles in premixed stagnation flames. The current synthesis occurs at relatively high flame temperature low precursor loading. Thermodynamic analysis based on the postulated process, Mn(g) + O2(g) ? MnO(s), carried out to quantify supersaturation potential impacts Kelvin effect particle formation. Nucleation growth are analyzed computed temperature–time–oxygen history postflame region. Agreement between measured position base doped flames indicates that methylcyclopentadienyl tricarbonyl does not inhibit chemistry conditions currently studied. Particle size distributions by mobility sizing TEM images show reasonable agreement. Moreover, predicted much more closely a nucleation-limited mechanism rather than coagulation-limited growth.