Synthesis of Magnetic Nanoparticles by Ultrashort Pulsed Laser Ablation of Iron in Different Liquids. Issue 9 (6th March 2017)

• Record Type: Journal Article
• Authors: Kanitz, Alexander; Hoppius, Jan S.; del Mar Sanz, María; Maicas, Marco; Ostendorf, Andreas; Gurevich, Evgeny L.
• Is Part Of: Chemphyschem. Volume 18:Issue 9(2017)
• Page Start: 1155
• Page End: 1164
• Publication Date: 2017-03-06
• Subjects: femtosecond lasers -- iron -- laser ablation -- magnetism -- nanoparticles; Chemistry, Physical and theoretical -- Periodicals; 541.05
• DOI: 10.1002/cphc.201601252
• Languages: English
• ISSNs: 1439-4235

Abstract

Abstract: Magnetic nanoparticles were generated by ultrashort pulsed laser ablation of an iron target in water, methanol, ethanol, acetone and toluene. The relationship between ablation rate, liquid properties and the physical and chemical properties of the nanoparticles was studied. Composition, morphology and magnetic properties were investigated by TEM, XPS and vibrating‐sample (VSM) and SQUID magnetometry. The properties of the generated nanoparticle ensembles reflected the influence of the liquid environment on the particle formation process. For example, the composition was strongly dependent on the carbon to oxygen ratio within the molecules of the liquid. In contrast to short pulsed laser ablation in liquids, the nanoparticles generated by ultrashort pulses had a higher level of polycrystallinity. Abstract : Which one reacts with iron? Femtosecond laser ablation of a pure iron plate in different solvents yields magnetic iron‐based nanoparticles with clean surfaces. The structural and magnetic properties of the nanoparticles can be tuned by careful choice of the liquid environment, for example, for the generation iron oxides or carbides (see picture).