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Magnetic nanoparticle heating efficiency reveals magneto-structural differences when characterized with wide ranging and high amplitude alternating magnetic fields
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10.1063/1.3597820
/content/aip/journal/jap/109/12/10.1063/1.3597820
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/12/10.1063/1.3597820

Figures

Image of FIG. 1.
FIG. 1.

(Color) Particle size and size distribution data obtained by photon correlation spectroscopy for BNF-Starch, nanomag®-D-spio, and Feridex® particles. Particle suspensions were diluted to 0.4 mg/ml for measurement as described in the text. Note that both nanomag®-D-spio and Feridex® particles exhibit a wider distribution than the BNF-Starch.

Image of FIG. 2.
FIG. 2.

Transmission electron microscope images of the BNF-Starch, nanomag®-D-spio, and Feridex® particles after diluting and drying on grid. Note that only the iron oxide crystals are visible as the polymer matrix or coating provides no contrast.

Image of FIG. 3.
FIG. 3.

(Color) ΔT vs t data for each of the three particles, (a) BNF-Starch, (b) nanomag®-D-spio, and (c) Feridex® at several different powers. For clarity only select temperature-time curves are plotted for each particle. Note the wide range of heating rates observed among the particles, particularly at maximum field amplitude, as well as the range of rates at different applied fields. (d) Data from each of the particles at 32 kA/m for comparison of relative heating rates.

Image of FIG. 4.
FIG. 4.

(Color) Incremental temperature change, Tn  − Tn −1, vs time for the three different MNP samples, each recorded at several different representative field amplitudes. In (b) and (c) a moving average trendline over a four data point range of each data set is added to aid visualization. (d) Data from each of the particles at 32 kA/m for comparison of incremental heating curves.

Image of FIG. 5.
FIG. 5.

(Color) SPL vs field strength curves of the various nanoparticle samples: BNF-Starch (Blue), nanomag®-D-spio (Orange), and Feridex® (Red). Error bars are included but may be obscured by the data points.

Tables

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Table I.

Nanoparticle parameters—BNF-Starch, nanomag®-D-spio, and Feridex®

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Table II.

Nanoparticle SPL—BNF-Starch, nanomag®-D-spio, and Feridex®

Generic image for table
Table III.

(Supplemental material): Full field-amplitude range nanoparticle SPL, data ranges used for calculation, and slope at incremental maxima

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/content/aip/journal/jap/109/12/10.1063/1.3597820
2011-06-21
2014-04-18
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetic nanoparticle heating efficiency reveals magneto-structural differences when characterized with wide ranging and high amplitude alternating magnetic fields
http://aip.metastore.ingenta.com/content/aip/journal/jap/109/12/10.1063/1.3597820
10.1063/1.3597820
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