Properties of magnetic nanoparticles in the Brownian relaxation range for liquid phase immunoassays

Keiji Enpuku, T. Tanaka, T. Matsuda, F. Dang, Naoya Enomoto, J. Hojo, K. Yoshinaga, F. Ludwig, F. Ghaffari, E. Heim, M. Schilling

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

Properties of magnetic nanoparticles in the Brownian relaxation region were studied. Using the magnetic nanoparticles that exhibit remanence, we measured the magnetic properties, such as static magnetization, magnetic relaxation, and alternating current susceptibility, in a solution. Comprehensive comparisons were made between the experimental results and the theoretical ones predicted from the Brownian relaxation. From the comparison, the distributions of the particle parameters, i.e., the magnetic moment and the relaxation time, were estimated. It was shown that all the magnetic properties can be well explained when we take into account the parameter distributions in the sample.

Original languageEnglish
Article number054901
JournalJournal of Applied Physics
Volume102
Issue number5
DOIs
Publication statusPublished - Sep 20 2007

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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