Banca de DEFESA: JOHANNY DARK LIMA DE SOUSA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JOHANNY DARK LIMA DE SOUSA
DATE: 19/02/2024
TIME: 14:00
LOCAL: Programa de Pós-Graduação em Ciência de Materiais
TITLE:

MANUFACTURE OF ZnO RODS USING THE CHEMICAL BATH DEPOSITION TECHNIQUE

KEY WORDS:

nanostructures; zinc oxide; CBD; RCA cleaning.

PAGES: 70
BIG AREA: Outra
AREA: Multidisciplinar
SUMMARY:

The present work aims to obtain zinc oxide (ZnO) nanorods on a silicon substrate using the chemical bath deposition (CBD) technique. These nanostructures have attracted great attention in recent years, becoming increasingly important due to their interdisciplinarity in various fields of research and because they lead to the obtaining of new materials with better physical and chemical properties. ZnO can be sintered in different morphologies. Through the use of different techniques and varying the temperature and concentration parameters of the precursors, it is possible to control the morphology that will be obtained. The nanostructures that were desired and were obtained were nanorods, in the form of hexagonal wurtzite, of ZnO. They were produced using the CBD method, on the surface of the silicon substrate, which went through an RCA cleaning process to remove all contaminants on the surface of this material, and characterized on different equipment. Its hexagonal structure and morphology were observed through scanning electron microscopy (SEM) analysis, as well as the sizes of some of these rods were estimated. In the X-ray diffractometry (XRD) analysis, the samples presented spectra and patterns corresponding to the ZnO material, with sharp and narrow peaks that indicate good crystallinity of the material. Another characterization that proved the qualities of the nanorods was the Raman spectrum, which showed signs and bands characteristic of these nanostructures. The results indicated success in the production of ZnO nanorods using the CBD technique, presenting good aspects for applications in several areas. 

COMMITTEE MEMBERS:
Presidente - 2457389 - EDUARDO PADRON HERNANDEZ
Externa à Instituição - GILVANIA LUCIA DA SILVA VILELA - UPE
Interna - 2330165 - MARIA GORETI CARVALHO PEREIRA