JOURNAL OF CHILEAN CHEMICAL SOCIETY

Vol 61 No 4 (2016): Journal of the Chilean Chemical Society
Original Research Papers

A CHEMOMETRIC APPROACH TO THE INFLUENCE OF THE SYNTHESIS PARAMETERS ON THE OPTICAL RESPONSE OF GOLD NANOPARTICLES AND STUDY OF THEIR ELECTROPHORETIC DEPOSITION ON SILICON

Renzo Milesi L.
Pontificia Universidad Católica de Valparaíso, Instituto de Química, Facultad de Ciencias
Emilio Navarrete S.
Pontificia Universidad Católica de Valparaíso, Instituto de Química, Facultad de Ciencias
Javier Román S.
Pontificia Universidad Católica de Valparaíso, Instituto de Química, Facultad de Ciencias
Víctor Rojas C.
Pontificia Universidad Católica de Valparaíso, Instituto de Química, Facultad de Ciencias
Rodrigo Henríquez N.
Pontificia Universidad Católica de Valparaíso, Instituto de Química, Facultad de Ciencias
Ricardo Schrebler G.
Pontificia Universidad Católica de Valparaíso, Instituto de Química, Facultad de Ciencias
Ricardo Córdova
Pontificia Universidad Católica de Valparaíso, Instituto de Química, Facultad de Ciencias
Eduardo C. Muñoz
Pontificia Universidad Católica de Valparaíso, Instituto de Química, Facultad de Ciencias
Published December 10, 2016
Keywords
  • Gold nanoparticles,
  • AFM,
  • TEM,
  • Experimental design,
  • Electrophoretic deposition
How to Cite
Milesi L., R., Navarrete S., E., Román S., J., Rojas C., V., Henríquez N., R., Schrebler G., R., Córdova, R., & Muñoz, E. C. (2016). A CHEMOMETRIC APPROACH TO THE INFLUENCE OF THE SYNTHESIS PARAMETERS ON THE OPTICAL RESPONSE OF GOLD NANOPARTICLES AND STUDY OF THEIR ELECTROPHORETIC DEPOSITION ON SILICON. Journal of the Chilean Chemical Society, 61(4). Retrieved from https://jcchems.com/index.php/JCCHEMS/article/view/117

Abstract

This study describes gold nanoparticle synthesis in an aqueous solution by reducing tetrachloroauric acid (HAuCl4), using sodium citrate as a reducing agent. Synthesis was optimized through an experimental design, and particle characterization was obtained through UV-Vis spectroscopy. In a first stage, a factorial design was conducted to establish the significance of the variables used in the synthesis, i.e. reducer concentration, temperature, stirring rate. In the second stage, the obtained nanoparticles were positioned on a silicon p-type substrate through electrophoretic deposition. The modified substrates were characterized by means of reflectance measurements and their morphology using transmission electron microscopy (TEM) and atomic force microscopy (AFM). Finally, a brief discussion was carried out concerning the sizes of the determined nanoparticles based on a model taken from the literature that relates maximum absorption with the nanoparticle diameter, comparing these with the sizes obtained through AFM and TEM observation. 

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