Error


Thermal characterization of solutions containing gold nanoparticles at different pH values


R. Gutierres Fuentes1, J. Pescador-Rojas1, J. Sánchez Rámirez1, J. Jiménez Pérez1, A. Cruz Orea2 and F. Sanchez Sinencio2

1Unidad Profesional Interdisciplinaria en Ingeniería y Tecnologías Avanzadas, Col. Barrio la Laguna Ticomán Delegación Gustavo A. Madero, México D.F., Mexico
2Departamento de Física, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Col. San Pedro Zacatenco, México, D.F., Mexico

Keywords: phothermal techniques
property: thermal diffusivity
material: nanoparticles

Thermal lens spectrometry (TLS) technique was used to obtain the thermal diffusivity of solutions containing gold nanoparticles (diameter of 15 nm) with variable pH values. TLS, in a mode-mismatched dual beam configuration, provides reliable alternative to measure, with high sensitivity, the thermal diffusivities of semitransparent materials and low thermal diffusivities. The results show that the nanofluid thermal diffusivity increases when the pH is increased. These results will be compared with reported studies of nanofluids with pH variable. From this comparison it can be seen that the pH values of the solutions influenced the superficial density of charges in the nanoparticles. Also the optical absorption spectra, for these gold nanoparticles solutions, were obtained using an spectrophotometer and the nanoparticle size was obtained by TEM technique. The present measurements were performed at room temperature.


     Official Sponsors

uni Anter_logo Tziolas_logo_ linseis netzsch