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Magnetic Assistance for Suppressing Cross-Reactions Between Biomolecules in Immunoassay

[+] Author Affiliations
Chin-Yih Hong

National Chung Hsing University, Taichung, Taiwan

Shieh-Yueh Yang

MagQu Co., Ltd., Sindian, Taipei, Taiwan

Herng-Er Horng

National Taiwan Normal University, Taipei, Taiwan

Hong-Chang Yang

National Taiwan University, Taipei, Taiwan

Paper No. DETC2010-28040, pp. 393-396; 4 pages
doi:10.1115/DETC2010-28040
From:
  • ASME 2010 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 4: 12th International Conference on Advanced Vehicle and Tire Technologies; 4th International Conference on Micro- and Nanosystems
  • Montreal, Quebec, Canada, August 15–18, 2010
  • Conference Sponsors: Design Engineering Division and Computers in Engineering Division
  • ISBN: 978-0-7918-4412-0 | eISBN: 978-0-7918-3881-5
  • Copyright © 2010 by ASME

abstract

A method involving the use of magnetic nanoparticles to suppress the cross-reactions in immunoassay is developed. Antibodies are coated onto magnetic nanoparticles. These antibodies bind with target and non-target molecules. Once an alternative-current magnetic field is applied, magnetic nanoparticles oscillate with the magnetic field. The target and non-target molecules attached onto magnetic nanoparticles via antibodies experience a centrifugal force, which is against the association between antibodies and target/non-target molecules. Theoretically, the centrifugal force is proportional to the square of the frequency of the applied magnetic field. Thus, the strength of the centrifugal force can be manipulated by changing the frequency of the applied magnetic field. By well controlling the frequency of applied magnetic field, the centrifugal force can be stronger than the binding between antibodies and non-target molecules, but still weaker than that of target molecules. Consequently, the binding between antibodies and non-target molecules is broken by the centrifugal force.

Copyright © 2010 by ASME

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