Photopyroelectric Techniques for thermo-optical characterization of gold nano-particles

7th International Congress of Engineering Physics

物理学;工业技术

Chávez-Sandoval, B.E.^1,2 ; Balderas-López, J.A.^1 ; Padilla-Bernal, G.^1 ; Moreno-Rivera, M.A.^1 ; Franco-Hernández, M.O.^1 ; Martínez-Jiménez, A.^2 ; García-Franco, F.^2

Unidad Profesional Interdisciplinaria de Biotecnología IPN, Av. Acueducto S/N, Barrio la Laguna Ticoman, Mexico D.F. CP

07340, Mexico^1

Universidad Autónoma Metropolitana-Azcapotzalco, Departamento de Ciencias Básicas, Avenida San Pablo No. 180., Colonia Reynosa Tamaulipas, México D.F. CP

02200, Mexico^2

关键词: Colloidal system;    Optical absorption coefficients;    Optical and thermal properties;    Photopyroelectric techniques;    Size and shape;    Thermo-optical characterization;    Thermo-physical property;    Two parameter;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/582/1/012027/pdf
DOI  :  10.1088/1742-6596/582/1/012027

学科分类：工业工程学

来源: IOP

【 摘 要 】

Since the first methodology, proposed by Turkevich, to produce gold nanoparticles (AuNPs), improvements have been made as to allow better controllability in their size and shape. These two parameters play important role for application of gold nanoparticles since they determine their optical and thermal properties. Two photopyroelectric techniques for the measurement of the thermal diffusivity and the optical absorption coefficient for nano-particles are introduced. These thermo-physical properties were measured for the colloidal systems at different nano-particle's sizes and, for optical properties, at three different wavelengths (405 nm, 488 nm and 532 nm). No significant difference, on thermal properties, was found in the range of nano-particles' sizes studied in this work; in opposition optical properties shown more sensitive to this parameter.