Local Structure of ZnO Micro Flowers and Nanoparticles Obtained by Micro-Segmented Flow Synthesis.
Summary of "Local Structure of ZnO Micro Flowers and Nanoparticles Obtained by Micro-Segmented Flow Synthesis."
The micro-segmented flow technique was applied for continuous synthesis of ZnO micro- and nanoparticles with short residence times of 9.4 s and 21.4 s, respectively. The obtained particles were characterized by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Small angle X-ray scattering (SAXS) and photoluminescence spectroscopy were used to determine the size and optical properties of ZnO nanoparticles. In addition, extended X-ray absorption fine structure (EXAFS) spectroscopy was employed to investigate local structural properties. The EXAFS measurements reveal a larger degree of structural disorder in the nanoparticles than the microparticles. These structural changes should be taken into consideration while evaluating the size-dependent visible emission of ZnO nanoparticles.
Affiliation
Department of Physical Chemistry and Micro Reaction Technology, Ilmenau University of Technology, Weimarer Strasse 32D-98693 Ilmenau (Germany). shuning.li@tu-ilmenau.de.
Journal Details
This article was published in the following journal.
Name: Chemphyschem : a European journal of chemical physics and physical chemistry
ISSN: 1439-7641
Pages: 1557-61
Links
- PubMed Source: http://www.ncbi.nlm.nih.gov/pubmed/22407573
- DOI: http://dx.doi.org/10.1002/cphc.201100960
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