Date of Award
This thesis focuses on the chemistry for stainless nanoparticle synthesis in order to develop corrosion resistant nanoparticles. Syntheses within the Maye lab have been successful, however at the large scale these processes have been hindered by low yields as a result of byproduct formation and oxidation loss. This study addresses these problems by introducing a new precursor to synthesize the Fe core of FeCr/Ni stainless core/shell particles. Traditionally iron pentacarbonyl (Fe(CO)5 is used, but this study uses iron acetylacetonate (Fe(acac)3) as a substitute. Although the degradation of Fe(CO)5 is more commonly used and is understood relatively well, Fe(acac)3 is safer and less costly. Properly synthesized particles show high crystallinity and have immense magnetic capabilities. A comparison between the two precursors is completed in this work. The ability for Fe0 particles to act as a core for stainless particles and the effects of shells on the cores is also analyzed. Analysis of the particles was done using thermogravimetric analysis (TGA), Laser Ablation Induced Coupled Plasma Mass Spectrometry (LA-ICPMS), Physical Property Measurement System (PPMS), and x-ray diffraction (XRD).
These analysis methods allow for the approximate composition of the particles to be
determined and the approximate extent of oxidation to be estimated. Results of the study
show that Fe(acac)3 iron particles are less metallic than Fe(CO)5, suggesting that
Fe(acac)3 is not an effective substitute for Fe(CO)5. This shows that further research
needs to be completed in order to find a potential substitute or create a new route for the
successful creation of stainless nanoparticles.
Klaczko, Michael E., "Investigating Stainless Steel Particle Synthesis" (2018). Honors Theses. 124.