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Bang, In Cheol
Nuclear Thermal-Hydraulics & Reactor Safety Lab
Research Interests
  • Nuclear Thermal-Hydraulics

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Characteristic stability of bare Au-water nanofluids fabricated by pulsed laser ablation in liquids

Cited 27 times inthomson ciCited 32 times inthomson ci
Title
Characteristic stability of bare Au-water nanofluids fabricated by pulsed laser ablation in liquids
Author
Kim, H.J.Bang, In CheolOnoe, J.
Keywords
Gold nanoparticles; Isoelectric point; Nanofluids; Pulsed laser ablation in liquids; Stability; Surface charge
Issue Date
200905
Publisher
ELSEVIER SCI LTD
Citation
OPTICS AND LASERS IN ENGINEERING, v.47, no.5, pp.532 - 538
Abstract
Gold nanoparticles (Au-NPs) suspended in water where the suspension is a kind of nanofluid, were produced by pulsed laser ablation in liquids. Under the laser irradiation conditions up to 18 h, the average size of the Au-NPs ranged from 7.1 to 12.1 nm while their size-distribution tended to become narrower with effects of laser-induced fragmentation. Interestingly, the nanofluid showed an outstanding colloidal stability even after 1 month although no dispersants were used. The characteristic stability of bare Au-NPs suspension in water was found to be due to a large negative zeta potential of Au-NPs in water. The thermal conductivity of the Au-NPs (0.018 vol%)/water suspension increased by 9.3±5.4% compared to that of pure water.
URI
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DOI
http://dx.doi.org/10.1016/j.optlaseng.2008.10.011
ISSN
0143-8166
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