Synthesis of 10 to 500 nm diameter Fe-based nanoparticles is described. Nanometer-sized droplets of iron carbonyl are generated by the rapid expansion of CO2-based supercritical fluid solutions and are photolyzed in-flight using a UV lamp to remove the carbonyl groups. Solid metal particles are collected electrostatically. Upon air oxidation, the iron particles react rapidly to produce an iron oxide phase. Mo-based nanoparticles were similarly produced using a Mo(Co)6 precursor.
Revised: May 18, 2011 |
Published: February 1, 2006
Citation
Fulton J.L., D.W. Matson, K.H. Pecher, J.E. Amonette, and J.C. Linehan. 2006.Metal-based Nanoparticle Synthesis from the Rapid Expansion of Carbon Dioxide Solutions.Journal of Nanoscience and Nanotechnology 6, no. 2:562-567.PNNL-SA-41170.