Química Nova (Jan 2012)

Preparação de nanopartículas de prata e ouro: um método simples para a introdução da nanociência em laboratório de ensino

  • Maurício Alves Melo Jr.,
  • Lucas Samuel Soares Santos,
  • Maria do Carmo Gonçalves,
  • Ana Flávia Nogueira

DOI
https://doi.org/10.1590/S0100-40422012000900030
Journal volume & issue
Vol. 35, no. 9
pp. 1872 – 1878

Abstract

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A new practical experiment involving silver and gold nanoparticle syntheses was introduced in an inorganic chemistry laboratory course for undergraduate students at the Institute of Chemistry, UNICAMP. The nanoparticles were synthesized by the reduction of silver nitrate and tetrachloroauric acid with sodium borohydride and sodium citrate in an aqueous medium. Stabilities of the suspensions were tested using several different reactants including sodium chloride, polyvinylpyrrolidone, polyvinyl alcohol and cistamine. Changes in optical properties were observed by electronic spectra and also by transmission electronic microscopy, which also yielded data for estimating particle size.

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