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Study of optical properties of unidimensional nanostructures of zinc oxide

Grant number: 11/18732-2
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): January 01, 2012
Effective date (End): December 31, 2012
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal Investigator:Flavio Leandro de Souza
Grantee:Daniel Monteiro Cunha
Home Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil


Nanomaterials have attracted tremendous interest due to the new properties observed in materials at the nanoscale. Among the types of nanostructures, one-dimensional nanostructures (with one of its dimensions on the nanoscale) are noted for being very versatile to serve as foundation for other materials. Metal oxides are excellent for fabrication of 1D nanostructures for being the most common class of materials and have high variability in terms of electronic properties. Among metal oxides, zinc oxide (ZnO) attracts great attention for being a wide band gap semiconductor, abundant, and its versatility for application in various devices such as gas sensors and UV lasers. In this context, this undergraduate research project's main objective is to study the optical properties of one-dimensional ZnO nanostructures produced by hydrothermal method. In this work, the methodology chosen for the synthesis is the low-temperature hydrothermal method, where reagents are mixed in aqueous solution with controlled pH in an autoclave flask ideal to the used temperature (90 ). To evaluate the optical properties of the material obtained, it will be used a combination of spectroscopic techniques such as electron spectroscopy in the ultraviolet / visible (UV/Vis) region of the electromagnetic spectrum and fluorescence spectroscopy. The structural properties and size of nanostructures will be evaluated by transmission electron microscopy (TEM) and X ray diffraction (XRD). The morphology will be evaluated from TEM.

Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
CUNHA, DANIEL M.; SOUZA, FLAVIO L. Facile synthetic route for producing one-dimensional zinc oxide nanoflowers and characterization of their optical properties. Journal of Alloys and Compounds, v. 577, p. 158-164, NOV 15 2013. Web of Science Citations: 19.
CUNHA, DANIEL M.; ITO, NATHALIE M.; XAVIER, ALLAN M.; ARANTES, JEVERSON T.; SOUZA, FLAVIO L. Zinc oxide flower-like synthesized under hydrothermal conditions. Thin Solid Films, v. 537, p. 97-101, JUN 30 2013. Web of Science Citations: 7.

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