Chemically synthesized L1/sub 0/-type FePt nanoparticles and nanoparticle arrays via template-assisted self-assembly

Chemical Synthesis of Sub‐micrometer‐ to Nanometer‐Sized Magnetic FeCo Dice

“…Further work is in progress to obtain colloidal dispersions of particles using surfactants such as oleic acid and oleylamine, as in the case of other alloys. [26] The lowest particle size of 35 nm in the present study enables ferromagnetic behavior as evidenced from the Mössbauer studies, whereas the superparamagnetic size limit of the alloy, found by substituting the value of anisotropy constant, K for FeCo [27] in Equation 2, is around 6 nm.…”

Recent Advances in Chemical Synthesis, Self‐Assembly, and Applications of FePt Nanoparticles

“…A conducting cantilever in a scanning probe microscope with a positive-biased pulse voltage is applied to the assembly, oxidizing the terminal alkane groups which are then capable of absorbing FePt nanoparticles via surfactant ex- change, yielding well-aligned sub-100 nm dot arrays with sub-100 nm periodicity. [83] More conveniently, the FePt nanoparticles can be patterned by a diblock copolymer template.…”

Co–Pt alloy nanoparticles produced using a template of nanoparticle array

“…One of the alternatives envisioned to replace the current high-density recording medium is a self-assembled magnetic nanoparticle system [2][3][4][5]. Among those, because of the high magnetocrystalline anisotropy of L1 0 ordered CoPt and FePt, their nanoparticles sized 1-10 nm have been fabricated by various means [5][6][7][8][9][10]. It has been demonstrated the particles can be arranged into a highly regular lattice using surfactant chemistry [10].…”