Gold nanoparticles on zinc oxide imaged by electron microscopy

• Tipo: Capítulo ou Parte de Livro
• Data: 2014

Autores

Sónia Carabineiro (Autor) FEUP; Cláudia Gomes da Silva (Autor) FEUP; Maria Sampaio (Autor) FEUP; Daniel L. Baptista (Autor) Outra; Joaquim Luís Faria (Autor) FEUP; José Luís Figueiredo (Autor) FEUP

Livro

Título: Microscopy: advances in scientific research and education

Páginas: 835-841

Indexação

Scopus

Classificação Científica

FOS: Ciências da engenharia e tecnologias > Nanotecnologia

CORDIS: Ciências Físicas > Química > Análise instrumental ; Ciências Tecnológicas > Engenharia > Engenharia química ; Ciências Tecnológicas > Tecnologia > Nanotecnologia

Outras Informações

Abstract (EN): ZnO materials with different micro/nanoscale morphologies (needle-like, rods, flower-like and spheroidal) were prepared by different techniques. Gold was loaded (1% wt.) on the ZnO supports through a double impregnation method. The morphology of the ZnO and Au/ZnO materials was analyzed by scanning electron microscopy (SEM) and energydispersive X-ray spectroscopy (EDS). Scanning transmission electron microscopy (STEM) and a high-angle annular darkfield (HAADF) detector were used to detect the gold anoparticles. High-resolution transmission electron microscopy (HRTEM) of Au/ZnO was also performed. As gold is only catalytically active in the form of nanoparticles well dispersed on the support, it is very important to use electron microscopy methods that enable the determination of size, morphology, crystallinity and chemistry of nanoscale gold.

Idioma: Inglês

Tipo (Avaliação Docente): Científica