Please use this identifier to cite or link to this item:
Author(s): Sónia Carabineiro
Cláudia Gomes da Silva
Maria Sampaio
Daniel L. Baptista
Joaquim Luís Faria
José Luís Figueiredo
Title: Gold nanoparticles on zinc oxide imaged by electron microscopy
Issue Date: 2014
Abstract: ZnO materials with different micro/nanoscale morphologies (needle-like, rods, flower-like and spheroidal) were preparedby different techniques. Gold was loaded (1% wt.) on the ZnO supports through a double impregnation method. Themorphology of the ZnO and Au/ZnO materials was analyzed by scanning electron microscopy (SEM) and energydispersiveX-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.
Subject: Análise instrumental, Nanotecnologia, Engenharia química, Nanotecnologia
Instrumental analysis, Nanotechonology, Chemical engineering, Nano-technology
Scientific areas: Ciências da engenharia e tecnologias::Nanotecnologia
Engineering and technology::Nano-technology
Source: Microscopy: advances in scientific research and education
Document Type: Capítulo ou Parte de Livro
Rights: restrictedAccess
Appears in Collections:FEUP - Capítulo ou Parte de Livro

Files in This Item:
File Description SizeFormat 
  Restricted Access
3.32 MBAdobe PDF    Request a copy from the Author(s)

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.