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Bead magnetorelaxom...
Bead magnetorelaxometry with an on-chip magnetoresistive sensor
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- Dalslet, Bjarke Thomas (author)
- Department of Micro- and Nanotechnology, Technical University of Denmark, DTU Nanotech, Lyngby, Danmark
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- Damsgaard, Christian Danvad (author)
- Department of Micro- and Nanotechnology, Technical University of Denmark, DTU Nanotech, Lyngby, Danmark
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- Donolato, Marco (author)
- LNESS Dipartimento di Fisica, Politecnico di Milano, Como, Italien
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- Strømme, Maria (author)
- Uppsala universitet,Nanoteknologi och funktionella material
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- Strömberg, Mattias (author)
- Uppsala universitet,Nanoteknologi och funktionella material
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- Svedlindh, Peter (author)
- Uppsala universitet,Fasta tillståndets fysik
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- Hansen, Mikkel Fougt (author)
- Department of Micro- and Nanotechnology, Technical University of Denmark, DTU Nanotech, Lyngby, Danmark
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(creator_code:org_t)
- 2011
- 2011
- English.
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In: Lab on a Chip. - : Royal Society of Chemistry (RSC). - 1473-0197 .- 1473-0189. ; 11:2, s. 296-302
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Magnetorelaxometry measurements on suspensions of magnetic beads are demonstrated using a planar Hall effect sensor chip embedded in a microfluidic system. The alternating magnetic field used for magnetizing the beads is provided by the sensor bias current and the complex magnetic susceptibility spectra are recorded as the 2nd harmonic of the sensor response. The complex magnetic susceptibility signal appears when a magnetic bead suspension is injected, it scales with the bead concentration, and it follows the Cole-Cole expression for Brownian relaxation. The complex magnetic susceptibility signal resembles that from conventional magnetorelaxometry done on the same samples apart from an offset in Brownian relaxation frequency. The time dependence of the signal can be rationalized as originating from sedimented beads.
Keyword
- TECHNOLOGY
- TEKNIKVETENSKAP
- Engineering Science with specialization in Solid State Physics
- Teknisk fysik med inriktning mot fasta tillståndets fysik
- Teknisk fysik med inriktning mot nanoteknologi och funktionella material
- Engineering Science with specialization in Nanotechnology and Functional Materials
Publication and Content Type
- ref (subject category)
- art (subject category)
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