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

Química Nova

Maurício Alves Melo Jr.¹  Lucas Samuel Soares Santos¹  Maria Do Carmo Gonçalves¹  Ana Flávia Nogueira¹ 

[1] ,Universidade Estadual de Campinas Instituto de Química Campinas SP ,Brasil

关键词: nanoscience;    gold and silver nanoparticles;    undergraduate experiment;   

DOI  :  10.1590/S0100-40422012000900030

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY-NC   
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