Caltech Nanofabrication Group

  • Increase font size
  • Default font size
  • Decrease font size
Home Research Nanofabrication

Magnetic Nanostructures as Amplifiers of Transverse Fields in Magnetic Resonance

Research Area: Nanofabrication Year: 2006
Type of Publication: In Proceedings Keywords: transverse magnetic fields, nanoparticle, magnetic resonance imaging, amplifier
Authors: Mladen Barbic; Axel Scherer
Editor: Unk.
Series: IEEE International Magnetics Conference 2006 Pages: 899
Abstract:
We introduce the concept of amplifying the transverse magnetic fields produced and/or detected with inductive coils in magnetic resonance settings by using the reversible transverse susceptibility properties of magnetic nanostructures. When a large magnetic field is applied perpendicular to the nanoparticle long axis, the particle becomes very sensitive to the perpendicular small AC field. This is advantageous for magnetic resonance detection, where one needs to amplify the signal in the presence of a large DC field. We have tested this property of nanoparticles up to 3MHz, and do not see (or expect) any variation up to frequencies of several giga-Hertz, which is beyond any reasonable nuclear magnetic resonance detection. transverse field amplification by magnetic nanoparticles provides not just an improvement in detection sensitivity, but also in magnetic resonance imaging resolution. Since the nanoparticle can in principle be only 5-10 nanometers in size, equivalent imaging spatial resolution would also be possible.
Full text:
PDF: Caltech only
Online version (publisher)

Contact

Administrative and Financial Contact

Kate Finigan
MC 200-36, Caltech
1200 E California Blvd
Pasadena, CA 91125

Office:  212 Sloan Annex
Phone:  626.395.4585
Fax: 626.577.8442
Email: kate@caltech.edu

Login