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Quasi-hexagonal ordered arrays of FePt nanoparticles prepared by a micellar method

  • Sheng, Q
  • Xing-Wang, Z
  • Zhi-Gang, Y
  • Jing-Bi, Y
  • Nuo-Fu, C
Publication Date
Jan 01, 2007
Knowledge Repository of SEMI,CAS
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Hexagonally ordered arrays of magnetic FePt nanoparticles on Si substrates are prepared by a self assembly of diblock copolymer PS-b-P2VP in toluene, a dip coating process and finally plasma treatment. The as-treated FePt nanoparticles are covered by an oxide layer that can be removed by a 40 s Ar+ sputtering. The effects of the sequence of adding salts on the composition distribution are revealed by x-ray photoelectron spectroscopy measurements. No particle agglomeration is observed after 600 degrees C annealing for the present ordered array of FePt nanoparticles, which exhibits advantages in patterning FePt nanoparticles by a micellar method. Moreover, magnetic properties of the annealed FePt nanoparticles at room temperature are investigated by a vibrating sample magnetometer.

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