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The route to single magnetic particle detection: a carbon nanotube decorated with a finite number of nanocubes

Irina Rod1, Olga Kazakova2,4, David C Cox2,3, Marina Spasova1 and Michael Farle1

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We propose an experimental technique that allows us a straightforward and reliable fabrication of magnetic and electromechanical nanodevices for single particle detection and characterization. We demonstrate three different experimental methods for fabrication of nanoscale devices consisting of either single or multiwall carbon nanotubes bridging metallic electrodes and decorated with magnetic iron/iron oxide nanocubes with a size of 18 nm. Electrical characterization of the devices as well as structural and magnetic investigations of nanoparticles are reported. In particular, the proposed method based on measurements of the magnetic resonance in a single nanoparticle will enable dynamic magnetic resonance measurements on a single magnetic nanoparticle with a moment of ~105 μB that are not feasible using conventional experimental techniques.


PACS

81.16.-c Methods of nanofabrication and processing

75.50.Tt Fine-particle systems; nanocrystalline materials

75.30.Cr Saturation moments and magnetic susceptibilities

85.35.-p Nanoelectronic devices

81.07.-b Nanoscale materials and structures: fabrication and characterization

73.63.-b Electronic transport in nanoscale materials and structures

Subjects

Electronics and devices

Condensed matter: electrical, magnetic and optical

Nanoscale science and low-D systems

Dates

Issue 33 (19 August 2009)

Received 28 April 2009, in final form 11 June 2009

Published 28 July 2009



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