Assembly of superparamagnetic nanoparticles under unidirectional external magnetic flux: Experimental and model establishments

Ka Fai Cedric Yiu, Chih Hao Yu, Huili Tang, Yong He, Shik Chi Tsang, Kin Y. Tam

Research output: Journal article publicationJournal articleAcademic researchpeer-review

5 Citations (Scopus)

Abstract

Recent development in assembling nanoparticles as building blocks into macroscopic functional structures or devices to harness the size-dependent properties of individual particles is an exciting new direction. Here, it is demonstrated that well-dispersed silica- encapsulated superparamagnetic FePt nanoparticles in solution can be assembled into high-quality, needle- or rod-shaped solid-state supercrystals by applying inhomogeneous external magnetic field together with controlled evaporation. By use of an aggregation model based on the population balance equation technique, this charactersitic morphology of the magnetic asembled crystals can be successfully derived.
Original languageEnglish
Pages (from-to)7599-7604
Number of pages6
JournalJournal of Physical Chemistry C
Volume112
Issue number20
DOIs
Publication statusPublished - 22 May 2008

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

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