Magnetic Nanoparticles with High Specific Absorption Rate at Low Alternating Magnetic Field.

PAPER pubmed Nano LIFE 2015 Engineering / measurement Effect: benefit Evidence: Insufficient

Read original paper → DOI: 10.1142/s1793984415500026 PMID: 26884816 Evidence Lab

Abstract

This paper describes the synthesis and properties of a new type of magnetic nanoparticle (MNP) for use in the hyperthermia treatment of tumors. These particles consist of 2-4 nm crystals of gamma-FeO gathered in 20-40 nm aggregates with a coating of carboxymethyl-dextran, producing a zetasize of 110-120 nm. Despite their very low saturation magnetization (1.5-6.5 emu/g), the specific absorption rate (SAR) of the nanoparticles is 22-200 W/g at applied alternating magnetic field (AMF) with strengths of 100-500 Oe at a frequency of 160 kHz.

AI evidence extraction

At a glance

Study type

Engineering / measurement

Effect direction

benefit

Population

—

Sample size

—

Exposure

ELF other · 0.16 MHz

Evidence strength

Insufficient

Confidence: 74% · Peer-reviewed: yes

Main findings

The paper reports synthesis of gamma-FeO magnetic nanoparticles and measures their heating performance under an alternating magnetic field. Reported nanoparticle SAR values range from 22–200 W/g at AMF strengths of 100–500 Oe and frequency of 160 kHz, despite low saturation magnetization (1.5–6.5 emu/g).

Outcomes measured

Nanoparticle specific absorption rate (SAR) under alternating magnetic field
Nanoparticle physical/chemical properties (size, aggregation, coating, saturation magnetization)

Limitations

No biological/clinical outcomes reported in the abstract (focus is on material synthesis and SAR measurements).
No sample size or experimental replication details provided in the abstract.
Exposure duration and detailed AMF parameters beyond field strength and frequency are not described in the abstract.

View raw extracted JSON

{
    "study_type": "engineering",
    "exposure": {
        "band": "ELF",
        "source": "other",
        "frequency_mhz": 0.1600000000000000033306690738754696212708950042724609375,
        "sar_wkg": null,
        "duration": null
    },
    "population": null,
    "sample_size": null,
    "outcomes": [
        "Nanoparticle specific absorption rate (SAR) under alternating magnetic field",
        "Nanoparticle physical/chemical properties (size, aggregation, coating, saturation magnetization)"
    ],
    "main_findings": "The paper reports synthesis of gamma-FeO magnetic nanoparticles and measures their heating performance under an alternating magnetic field. Reported nanoparticle SAR values range from 22–200 W/g at AMF strengths of 100–500 Oe and frequency of 160 kHz, despite low saturation magnetization (1.5–6.5 emu/g).",
    "effect_direction": "benefit",
    "limitations": [
        "No biological/clinical outcomes reported in the abstract (focus is on material synthesis and SAR measurements).",
        "No sample size or experimental replication details provided in the abstract.",
        "Exposure duration and detailed AMF parameters beyond field strength and frequency are not described in the abstract."
    ],
    "evidence_strength": "insufficient",
    "confidence": 0.7399999999999999911182158029987476766109466552734375,
    "peer_reviewed_likely": "yes",
    "keywords": [
        "magnetic nanoparticles",
        "hyperthermia",
        "tumor treatment",
        "specific absorption rate",
        "alternating magnetic field",
        "gamma-FeO",
        "carboxymethyl-dextran",
        "160 kHz"
    ],
    "suggested_hubs": []
}

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

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