We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Formation Mechanism of Laser-Synthesized Iron-Manganese Alloy Nanoparticles, Manganese Oxide Nanosheets and Nanofibers.
- Authors
Zhang, Dongshi; Ma, Zheng; Spasova, Marina; Yelsukova, Anna E.; Lu, Suwei; Farle, Michael; Wiedwald, Ulf; Gökce, Bilal
- Abstract
Laser ablation in liquids (LAL) has emerged as a versatile approach for the synthesis of alloy particles and oxide nanomaterials. However, complex chemical reactions often take place during synthesis due to inevitable atomization and ionization of the target materials and decomposition/hydrolysis of solvent/solution molecules, making it difficult to understand the particle formation mechanisms. In this paper, a possible route for the formation of FeMn alloy nanoparticles as well as MnO x nanoparticles, -sheets, and -fibers by LAL is presented. The observed structural, compositional, and morphological variations are clarified by transmission electron microscopy (TEM). The studies suggest that a reaction between Mn atoms and Fe ions followed by surface oxidation result in nonstoichiometric synthesis of Fe-rich FeMn@FeMn2O4 core-shell alloy particles. Interestingly, a phase transformation from Mn3O4 to Mn2O3 and finally to Ramsdellite γ-MnO2 is accompanied by a morphology change from nanosheets to nanofibers in gradually increasing oxidizing environments. High-resolution TEM images reveal that the particle-attachment mechanism dominates the growth of different manganese oxides.
- Subjects
IRON-manganese alloys; LASER ablation; MANGANESE oxides; NANOPARTICLE synthesis; NANOFIBERS; NANOSTRUCTURED materials synthesis; TRANSMISSION electron microscopy; IRON compound synthesis
- Publication
Particle & Particle Systems Characterization, 2017, Vol 34, Issue 3, pn/a
- ISSN
0934-0866
- Publication type
Article
- DOI
10.1002/ppsc.201600225