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Optimal synthesis and characterization of Ag nanofluids by electrical explosion of wires in liquids.

Ju Park E, Won Lee S, Bang IC, Park HW - Nanoscale Res Lett (2011)

Bottom Line: In this study, we optimized the fabrication method and examined the effects of manufacturing process parameters.The average Ag nanoparticle size in water was 118.9 nm and the zeta potential was -42.5 mV.The critical heat flux of the 0.001-vol.% Ag nanofluid was higher than pure water.

View Article: PubMed Central - HTML - PubMed

Affiliation: School of Mechanical and Advanced Materials Engineering, UNIST 100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan Metropolitan City 689-798, Republic of Korea. hwpark@unist.ac.kr.

ABSTRACT
Silver nanoparticles were produced by electrical explosion of wires in liquids with no additive. In this study, we optimized the fabrication method and examined the effects of manufacturing process parameters. Morphology and size of the Ag nanoparticles were determined using transmission electron microscopy and field-emission scanning electron microscopy. Size and zeta potential were analyzed using dynamic light scattering. A response optimization technique showed that optimal conditions were achieved when capacitance was 30 μF, wire length was 38 mm, liquid volume was 500 mL, and the liquid type was deionized water. The average Ag nanoparticle size in water was 118.9 nm and the zeta potential was -42.5 mV. The critical heat flux of the 0.001-vol.% Ag nanofluid was higher than pure water.

No MeSH data available.


Related in: MedlinePlus

Ag particles coating the surface of the wire after boiling. Magnification: ×400 (a), ×4,998 (b).
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Figure 10: Ag particles coating the surface of the wire after boiling. Magnification: ×400 (a), ×4,998 (b).

Mentions: Typical boiling curves for pure water and Ag nanofluids are shown in Figure 9. The boiling curves of Ag nanofluids showed no significant change due to the very low concentration. The increase in the CHF can be explained by the changes in surface properties [19]. Analysis of the wire surface showed that a silver layer built up during nanofluids boiling, as shown in Figure 10.


Optimal synthesis and characterization of Ag nanofluids by electrical explosion of wires in liquids.

Ju Park E, Won Lee S, Bang IC, Park HW - Nanoscale Res Lett (2011)

Ag particles coating the surface of the wire after boiling. Magnification: ×400 (a), ×4,998 (b).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211281&req=5

Figure 10: Ag particles coating the surface of the wire after boiling. Magnification: ×400 (a), ×4,998 (b).
Mentions: Typical boiling curves for pure water and Ag nanofluids are shown in Figure 9. The boiling curves of Ag nanofluids showed no significant change due to the very low concentration. The increase in the CHF can be explained by the changes in surface properties [19]. Analysis of the wire surface showed that a silver layer built up during nanofluids boiling, as shown in Figure 10.

Bottom Line: In this study, we optimized the fabrication method and examined the effects of manufacturing process parameters.The average Ag nanoparticle size in water was 118.9 nm and the zeta potential was -42.5 mV.The critical heat flux of the 0.001-vol.% Ag nanofluid was higher than pure water.

View Article: PubMed Central - HTML - PubMed

Affiliation: School of Mechanical and Advanced Materials Engineering, UNIST 100 Banyeon-ri, Eonyang-eup, Ulju-gun, Ulsan Metropolitan City 689-798, Republic of Korea. hwpark@unist.ac.kr.

ABSTRACT
Silver nanoparticles were produced by electrical explosion of wires in liquids with no additive. In this study, we optimized the fabrication method and examined the effects of manufacturing process parameters. Morphology and size of the Ag nanoparticles were determined using transmission electron microscopy and field-emission scanning electron microscopy. Size and zeta potential were analyzed using dynamic light scattering. A response optimization technique showed that optimal conditions were achieved when capacitance was 30 μF, wire length was 38 mm, liquid volume was 500 mL, and the liquid type was deionized water. The average Ag nanoparticle size in water was 118.9 nm and the zeta potential was -42.5 mV. The critical heat flux of the 0.001-vol.% Ag nanofluid was higher than pure water.

No MeSH data available.


Related in: MedlinePlus