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

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


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

Topics: nanoscience, gold and silver nanoparticles, undergraduate experiment, Chemistry, QD1-999, Science, Q
Publisher: Sociedade Brasileira de Química
Year: 2012
DOI identifier: 10.1590/S0100-40422012000900030
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