Magnetic nanoparticles: Surface effects and properties related to biomedicine applications

Bashar Issa, Ihab M. Obaidat, Borhan A. Albiss, Yousef Haik

Research output: Contribution to journalReview articlepeer-review

861 Citations (Scopus)


Due to finite size effects, such as the high surface-to-volume ratio and different crystal structures, magnetic nanoparticles are found to exhibit interesting and considerably different magnetic properties than those found in their corresponding bulk materials. These nanoparticles can be synthesized in several ways (e.g., chemical and physical) with controllable sizes enabling their comparison to biological organisms from cells (10-100 μm), viruses, genes, down to proteins (3-50 nm). The optimization of the nanoparticles' size, size distribution, agglomeration, coating, and shapes along with their unique magnetic properties prompted the application of nanoparticles of this type in diverse fields. Biomedicine is one of these fields where intensive research is currently being conducted. In this review, we will discuss the magnetic properties of nanoparticles which are directly related to their applications in biomedicine. We will focus mainly on surface effects and ferrite nanoparticles, and on one diagnostic application of magnetic nanoparticles as magnetic resonance imaging contrast agents.

Original languageEnglish
Pages (from-to)21266-21305
Number of pages40
JournalInternational journal of molecular sciences
Issue number11
Publication statusPublished - Oct 25 2013


  • Anisotropy
  • Contrast agent
  • Core-shell
  • Exchange
  • Ferrite
  • MRI
  • Magnetic moment
  • Nanoparticle
  • Superparamagnetism
  • Surface spin

ASJC Scopus subject areas

  • Catalysis
  • Molecular Biology
  • Spectroscopy
  • Computer Science Applications
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry


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