Low-temperature solution synthesis of chemically functional ferromagnetic FePtAu nanoparticles.
Magnetic nanoparticles are of great scientific and technological interest. The application of ferromagnetic nanoparticles for high-density data storage has great potential, but energy efficient synthesis of uniform, isolated, and patternable nanoparticles that remain ferromagnetic at room temperature is not trivial. Here, we present a low-temperature solution synthesis method for FePtAu nanoparticles that addresses all those issues and therefore can be regarded as an important step toward applications. We show that the onset of the chemically ordered face-centered tetragonal (L1(0)) phase is obtained for thermal annealing temperatures as low as 150 degrees C. Large uniaxial magnetic anisotropy (10(7) erg/cm(3)) and a high long-range order parameter have been obtained. Our low-temperature solution annealing leaves the organic ligands intact, so that the possibility for postanneal monolayer formation and chemically assisted patterning on a surface is maintained.
Kinge
Sachin
S
Strategic Research Orientation NanoElectronics, Laboratory of Supramolecular Chemistry and Technology, Faculty of Science and Technology, and Inorganic Materials Science Group, Faculty of Science and Technology, MESA+ Institute for Nanotechnology, University of Twente, 7500 AE Enschede, The Netherlands. sachin.kinge@toyota-europe.com
Gang
Tian
T
Naber
Wouter J M
WJ
Boschker
Hans
H
Rijnders
Guus
G
Reinhoudt
David N
DN
van der Wiel
Wilfred G
WG
D000497:Alloys / Q000138:chemical synthesis* / Q000737:chemistry; D006046:Gold / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D008280:Magnetics; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology; D010316:Particle Size; D010984:Platinum / Q000737:chemistry*; D012996:Solutions; D013499:Surface Properties; D013696:Temperature
D000497:Alloys; D012996:Solutions; D010984:Platinum; D006046:Gold; D007501:Iron