Synthesis and characterization of gold/water nanofluids suitable for thermal applications produced by femtosecond laser radiation
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Altres documents de l'autoria: Mondragon, Rosa; Torres-Mendieta, Rafael; Meucci, Marco; Mínguez-Vega, Gladys; Juliá Bolívar, José Enrique; Sani, Elisa
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Synthesis and characterization of gold/water nanofluids suitable for thermal applications produced by femtosecond laser radiationAutoria
Data de publicació
2016-07Editor
Society of Photo-optical Instrumentation Engineers (SPIE)ISSN
1947-7988Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
http://spie.org/publications/journals/journal-of-photonics-for-energyParaules clau / Matèries
Resum
A laser-based “green” synthesis of nanoparticles (NPs) was used to manufacture gold
NPs in water. The light source is a Ti:Sapphire laser with 30 fs FWHM pulses, 800 nm mean
wavelength, and 1 kHz repetition rate. ... [+]
A laser-based “green” synthesis of nanoparticles (NPs) was used to manufacture gold
NPs in water. The light source is a Ti:Sapphire laser with 30 fs FWHM pulses, 800 nm mean
wavelength, and 1 kHz repetition rate. The method involves two stages: (1) pulsed laser ablation
in liquids and (2) photo-fragmentation (PF). Highly pure and well-dispersed NPs with a diameter
of 18.5 nm that can be stored at room temperature without showing any agglomeration over a
period of at least 3 months were produced without the need to use any stabilizer. Transmittance
spectra, extinction coefficient, NPs agglomeration dynamics, and thermal conductivity of the
nanofluids obtained were analyzed before and after being submitted to thermal cycling and compared
to those obtained for commercial gold/water suspensions. Optical properties have also
been investigated, showing no substantial differences for thermal applications between NPs produced
by the laser ablation and PF technique and commercial NPs. Therefore, nanofluids produced
by this technique can be used in thermal applications, which are foreseen for conventional
nanofluids, e.g., heat transfer enhancement and solar radiation direct absorption, but offering the
opportunity to produce them in situ in almost any kind of fluid without the production of any
chemical waste. [-]
Publicat a
Journal of Photonics for Energy, 2016, V. 6, n. 3Drets d'accés
© 2016 Society of Photo-Optical Instrumentation Engineers (SPIE)
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