20 August 2015 Feasibility of sizing metallic nanoparticles in concentrated suspensions from effective optical properties
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Abstract
We explore using measurements of the effective refractive index of a metallic nanofluid to estimate the size of the particles in it. We assume the nanofluid consists of spherical metallic nanoparticles suspended in a transparent base liquid and discuss a way of measuring the real and imaginary parts of the effective refractive index for concentrated nanofluids to about 1% in particles’ volume concentration. Specifically, we consider the case of copper nanoparticles suspended in water. We propose an unambiguous effective optical parameter as a candidate to evidence the particle size, potentially in real time. Limitations due to dependent scattering effects in concentrated nanofluids are briefly stated.
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G. Morales-Luna, G. Morales-Luna, R. Márquez-Islas, R. Márquez-Islas, O. Vázquez-Estrada, O. Vázquez-Estrada, H. Contreras-Tello, H. Contreras-Tello, A. García-Valenzuela, A. García-Valenzuela, } "Feasibility of sizing metallic nanoparticles in concentrated suspensions from effective optical properties", Proc. SPIE 9556, Nanoengineering: Fabrication, Properties, Optics, and Devices XII, 95561I (20 August 2015); doi: 10.1117/12.2187032; https://doi.org/10.1117/12.2187032
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