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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.


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XRD pattern of Ag nanoparticles produced by EEWL.
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Figure 5: XRD pattern of Ag nanoparticles produced by EEWL.

Mentions: The energy deposited in the wire affected the size and shape of the particles (Table 3). As the energy deposited in the wire increased, the particle size decreased. Figure 5 shows the X-ray diffraction [XRD] patterns of silver nanoparticles generated through the EEWL. Only a silver peak was observed. The average size of the synthesized Ag nanoparticles calculated from the XRD patterns by Scherrer's equation is around 23.9 nm. Figure 6 shows the size distribution from TEM images and the morphology of the Ag nanoparticles at different capacitances. The charging time and duration of plasma can influence the formation of particles. The Ag particles were spherical in shape and the particle distribution approached a bimodal distribution, which may have resulted from liquid droplet formation-induced aggregation of particles [17].


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)

XRD pattern of Ag nanoparticles produced by EEWL.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 5: XRD pattern of Ag nanoparticles produced by EEWL.
Mentions: The energy deposited in the wire affected the size and shape of the particles (Table 3). As the energy deposited in the wire increased, the particle size decreased. Figure 5 shows the X-ray diffraction [XRD] patterns of silver nanoparticles generated through the EEWL. Only a silver peak was observed. The average size of the synthesized Ag nanoparticles calculated from the XRD patterns by Scherrer's equation is around 23.9 nm. Figure 6 shows the size distribution from TEM images and the morphology of the Ag nanoparticles at different capacitances. The charging time and duration of plasma can influence the formation of particles. The Ag particles were spherical in shape and the particle distribution approached a bimodal distribution, which may have resulted from liquid droplet formation-induced aggregation of particles [17].

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