Artículos de revistas
Preparação de nanopartículas de prata e ouro: um método simples para a introdução da nanociência em laboratório de ensino
Preparation of silver and gold nanoparticles: a simple method to introduce nanotechnology into teaching laboratories
Registro en:
Química Nova. Sociedade Brasileira de Química, v. 35, n. 9, p. 1872-1878, 2012.
0100-4042
S0100-40422012000900030
10.1590/S0100-40422012000900030
Autor
Melo Jr., Maurício Alves
Santos, Lucas Samuel Soares
Gonçalves, Maria do Carmo
Nogueira, Ana Flávia
Institución
Resumen
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. 1872 1878 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)