title: Synthesis of Magnetic Nanoparticles by Ultrashort Pulsed Laser Ablation of Iron in Different Liquids.
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.
authors.affiliation: Applied Laser Technologies, Ruhr-Universität Bochum, Universitätsstr.150, 44801, Bochum, Germany.
authors.forename: Alexander
authors.identifier: http://orcid.org/0000-0002-5941-0472
authors.initials: A
authors.lastname: Kanitz
authors.affiliation: Applied Laser Technologies, Ruhr-Universität Bochum, Universitätsstr.150, 44801, Bochum, Germany.
authors.forename: Jan S
authors.initials: JS
authors.lastname: Hoppius
authors.affiliation: Instituto de Sistemas Optoelectrónicos y Microstecnología (ISOM), E.T.S.I.T-U.P.M., Avda. Complutense 30, 28004, Madrid, Spain.
authors.forename: María
authors.initials: M
authors.lastname: Del Mar Sanz
authors.affiliation: Instituto de Sistemas Optoelectrónicos y Microstecnología (ISOM), E.T.S.I.T-U.P.M., Avda. Complutense 30, 28004, Madrid, Spain.
authors.forename: Marco
authors.initials: M
authors.lastname: Maicas
authors.affiliation: Applied Laser Technologies, Ruhr-Universität Bochum, Universitätsstr.150, 44801, Bochum, Germany.
authors.forename: Andreas
authors.initials: A
authors.lastname: Ostendorf
authors.affiliation: Applied Laser Technologies, Ruhr-Universität Bochum, Universitätsstr.150, 44801, Bochum, Germany.
authors.forename: Evgeny L
authors.initials: EL
authors.lastname: Gurevich
keywords: femtosecond lasers; iron; laser ablation; magnetism; nanoparticles