Gold nanoparticles on zinc oxide imaged by electron microscopy

• Type: Chapter or Part of a Book
• Date: 2014

Authors

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

Book

Title: Microscopy: advances in scientific research and education

Pages: 835-841

Indexing

Scopus

Scientific classification

FOS: Engineering and technology > Nano-technology

CORDIS: Physical sciences > Chemistry > Instrumental analysis ; Technological sciences > Engineering > Chemical engineering ; Technological sciences > Technology > Nanotechonology

Other information

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.

Language: English

Type (Professor's evaluation): Scientific