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Research Papers

Photothermal Properties of Near-Spherical Gold Nanofluids With Strong Localized Surface Plasmon Resonance

[+] Author and Article Information
Wang Lingling, Zhu Guihua, Zhu Dahai, Zhang Yingchun, Zhang Liye, Xie Huaqing

School of Environment and
Materials Engineering,
College of Engineering,
Shanghai Polytechnic University,
Shanghai 201209, China

Yu Wei

School of Environment and
Materials Engineering,
College of Engineering,
Shanghai Polytechnic University,
Shanghai 201209, China
e-mail: yuwei@sspu.edu.cn

1Corresponding author.

Contributed by the Heat Transfer Division of ASME for publication in the JOURNAL OF THERMAL SCIENCE AND ENGINEERING APPLICATIONS. Manuscript received January 10, 2017; final manuscript received February 22, 2017; published online August 28, 2017. Assoc. Editor: Jingchao Zhang.

J. Thermal Sci. Eng. Appl 10(1), 011015 (Aug 28, 2017) (5 pages) Paper No: TSEA-17-1012; doi: 10.1115/1.4036800 History: Received January 10, 2017; Revised February 22, 2017

Near-spherical gold nanoparticles were synthesized using a facile chemical reduction method. The optical properties, size, and morphology of nanofluids were characterized using ultraviolet–visible–near-infrared (UV–Vis–NIR) spectroscopy and transmission electron microscope (TEM). All the gold nanofluids showed better photothermal conversion characteristics than H2O due to the strong localized surface plasmon resonance (LSPR) effect. The increase in gold nanoparticles diameters resulted in lower photothermal conversion properties, so the appropriate reducing agents have great influence on the optical properties of gold nanofluids in our experimental system. Trisodium citrate is the optimum reducing agents compared with NaBH4 and ascorbic acid (AA).

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Figures

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Fig. 1

Graphic description of the photothermal conversion experimental system

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Fig. 2

(a) UV–visible spectra of 50 ppm gold nanofluids synthesized with different reducing agent, (b) UV–Vis–NIR spectra of H2O and different concentration of gold nanofluids using trisodium citrate as a reducing agent, and (c) incident solar irradiance (ASTM G173-03)

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Fig. 3

The extinction coefficients of H2O and different concentration of gold nanofluids using trisodium citrate as a reducing agent

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Fig. 4

(a) Low-magnification TEM image, (b) high-magnification TEM image, (c) particle size distribution, and (d) EDS spectrum for gold nanofluids synthesized with trisodium citrate

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Fig. 5

Temperature rise of: (a) the gold nanofluids synthesized with different reducing agent, (b) different concentrations of gold nanofluids synthesized with trisodium citrate, and (c) maximum temperature rise for H2O and the gold nanofluids synthesized with different reducing agent

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