Characterization of Magnetic Markers for Bio-sensing Application

• Bhuiya Anwarul Kabir

  Department of Electrical and Electronic Engineering, Graduate Student

• 吉田 敬

  九州大学システム情報科学研究院電気システム工学部門

• 圓福 敬二

  九州大学システム情報科学研究院電気システム工学部門

抄録

Magnetic properties of magnetic markers in solution were studied for biosensor application, where the marker consisted of magnetic nanoparticles and coating materials. Frequency dependence of the ac susceptibility and the magnetization curve, which were caused by the Brownian rotation of the marker, were measured. The effect of the viscosity of the carrier liquid on the ac susceptibility was also clarified. The experimental results were analyzed by the singular value decomposition (SVD) method in order to estimate the distributions of size d and magnetic moment m of the markers. From the frequency dependence of the susceptibility, we obtained that the maker size distributed from 40 nm to 80 nm with mean diameter of d=60 nm. Form the magnetization curve, we estimated that the magnetic moment distributed from 5x10^-25 to 5x10^-24 Wbm with mean value of m=3x10^-24 Wbm. Combining the above two results, we also obtained the dependence of m on d.

収録刊行物

• 九州大学大学院システム情報科学紀要

  九州大学大学院システム情報科学紀要 15 (2), 77-83, 2010-09-24

  九州大学大学院システム情報科学研究院

キーワード

• Magnetic marker
• Brownian rotation
• Viscosity
• AC susceptibility
• Magnetic moment
• Size distribution
• Singular value decomposition (SVD)
• Biosensor

詳細情報

• CRID: 1390290699813719424
• NII論文ID: 120002795247
• NII書誌ID: AN10569524
• DOI: 10.15017/18987
• ISSN: 21880891
• ISSN: 13423819
• HANDLE: 2324/18987
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • IRDB
  • CiNii Articles
• 抄録ライセンスフラグ: 使用可