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Effects of alignment, pH, surfactant, and solvent on heat transfer nanofluids containing Fe2O3 and CuO nanoparticles
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10.1063/1.3694676
/content/aip/journal/jap/111/6/10.1063/1.3694676
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/6/10.1063/1.3694676

Figures

Image of FIG. 1.
FIG. 1.

TEM micrograph of Fe2O3 and CuO nanoparticles prepared by rapid drying of a diluted sample. (a) Fe2O3, (b) CuO.

Image of FIG. 2.
FIG. 2.

(Color online) Microscope image of nanoparticles dispersing in water under different conditions [(a): CuO H = 0 kG, (b): Fe2O3 H = 0 kG, (c): Fe2O3 H = 0.12 kG].

Image of FIG. 3.
FIG. 3.

(Color online) Microscope image of nanoparticles dispersing in ethylene glycol under different conditions [(a): CuO H = 0 kG, (b): Fe2O3 H = 0 kG, (c): Fe2O3 H = 0.12 kG].

Image of FIG. 4.
FIG. 4.

(Color online) Microscope image of nanoparticles, NaDDBS (chemical surfactant) dispersing in water under different conditions [(a): Fe2O3 H = 0 kG, (b): CuO H = 0 kG, (c): Fe2O3 H = 0.12 kG].

Image of FIG. 5.
FIG. 5.

(Color online) Fe2O3 and CuO zeta potentials and average particle size vs different pH values. (a) Fe2O3, (b) CuO.

Image of FIG. 6.
FIG. 6.

(Color online) Dispersion behavior of 3 wt. % Fe2O3 nanofluids at different pH values (4, 6, 8, 11) [(a): 0 hr, (b): 2 h].

Tables

Generic image for table
Table I.

Thermal conductivities (TC) of nanoparticles (Fe2O3 and CuO, 0.4 vol%) dispersing in water, in ethylene glycol, and in water with NaDDBS as surfactant.

Generic image for table
Table II.

pH of Fe2O3, CuO in different mediums.

Generic image for table
Table III.

TC of 3wt% Fe2O3 aqueous solutions at different pH.

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/content/aip/journal/jap/111/6/10.1063/1.3694676
2012-03-20
2014-04-23
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Effects of alignment, pH, surfactant, and solvent on heat transfer nanofluids containing Fe2O3 and CuO nanoparticles
http://aip.metastore.ingenta.com/content/aip/journal/jap/111/6/10.1063/1.3694676
10.1063/1.3694676
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