Uniaxial alignment of the smallest diamagnetic susceptibility axis using time-dependent magnetic fields.

Langmuir : the ACS journal of surfaces and colloids · 2004 · Unclear · Insufficient evidence

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UnclearInsufficient evidencePaper 3632

A polymer short fiber (with its axis coinciding with the smallest diamagnetic susceptibility axis, chi3) suspended in a density-matched fluid aligned perpendicular to the plane of an applied rotating magnetic field generated by rotating permanent magnets. The…

Study snapshot

PublicationLangmuir : the ACS journal of surfaces and colloids · 2004

Study typeengineering

Reported directionUnclear

Evidence ratingInsufficient

Abstract

A diamagnetic particle with magnetic susceptibilities chi3 < chi2 = chi1 < 0 was subjected to a rotating magnetic field to obtain an alignment of the chi3 axis (the smallest susceptibility axis) in the direction perpendicular to the plane of the rotating magnetic field. A polymer short fiber, whose fiber axis coincides with the chi3 axis, was suspended in a fluid with the same density, and then a rotating magnetic field generated by a rotation of a pair of permanent magnets was applied. The fiber axis, rotating following the applied field, finally ended up with an alignment perpendicular to the plane of the rotating magnetic field. The experimental data on the time course of the alignment was in good agreement with the numerical calculation based on the equation of rotation.

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AI evidence extraction

Structured fields below were generated from the paper’s abstract and metadata to make the evidence easier to inspect. Automated extraction may be incomplete or incorrect; verify important details against the original paper.

Study typeengineering

Effect directionunclear

PopulationNot supplied

Sample sizeNot supplied

ExposureNot supplied

Evidence strengthInsufficientConfidence: 74% · Peer reviewed: yes

Main findings

Outcomes measured

Alignment of diamagnetic particle/fiber axis (chi3 axis) relative to rotating magnetic field plane
Time course of alignment compared with numerical calculation

View raw extracted JSON

{
  "study_type": "engineering",
  "exposure": {
    "band": null,
    "source": "rotating magnetic field (pair of permanent magnets)",
    "frequency_mhz": null,
    "sar_wkg": null,
    "duration": null
  },
  "population": null,
  "sample_size": null,
  "outcomes": [
    "Alignment of diamagnetic particle/fiber axis (chi3 axis) relative to rotating magnetic field plane",
    "Time course of alignment compared with numerical calculation"
  ],
  "main_findings": "A polymer short fiber (with its axis coinciding with the smallest diamagnetic susceptibility axis, chi3) suspended in a density-matched fluid aligned perpendicular to the plane of an applied rotating magnetic field generated by rotating permanent magnets. The measured time course of alignment agreed well with numerical calculations based on an equation of rotation.",
  "effect_direction": "unclear",
  "limitations": [],
  "evidence_strength": "insufficient",
  "confidence": 0.74,
  "peer_reviewed_likely": "yes",
  "keywords": [
    "diamagnetic susceptibility",
    "uniaxial alignment",
    "rotating magnetic field",
    "permanent magnets",
    "polymer short fiber",
    "numerical calculation",
    "equation of rotation"
  ],
  "suggested_hubs": []
}

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AI-extracted fields are generated from the abstract and metadata and may be incomplete or incorrect. This material is for informational purposes and is not medical advice.

Identifiers and source

DOI: 10.1021/la049347w
PubMed: 16459577

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