Banca de QUALIFICAÇÃO: DIEGO ANÍSIO MODESTO

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : DIEGO ANÍSIO MODESTO
DATA : 22/07/2019
HORA: 14:00
LOCAL: sala 301,3º andar, Bloco B, Campus SA, Av.dos Estados, 5001, Sta.Terezinha,Santo André-SP
TÍTULO:

Synthesis of one-dimensional ceramic nanostructures: characterizations and devices applications

PÁGINAS: 90
GRANDE ÁREA: Engenharias
ÁREA: Engenharia de Materiais e Metalúrgica
SUBÁREA: Materiais Não-Metálicos
ESPECIALIDADE: Cerâmicos
RESUMO:

About the advances in nanoscience, one can say that the development of equipment based on nanostructures has great impact on scientific knowledge production and technological innovations both of which result in contributions to the society. Creating devices for spintronics, single-photon detectors, and photocatalytic systems are some interesting examples of superconducting and semiconducting nanostructured materials applications. Thus, the following ceramic materials, YBa₂Cu₃O_7-δ(YBCO), La_1-xSr_xMnO₃(LSMO) and In₂Cu₂O₅(ICO), can be evidenced as potential compounds for those applications. The present work aims to carry out the synthesis and characterization of those ceramics for applying their physical properties on devices. The techniques of electrospinning and sol-gel filling nanoporous membrane were used to obtain the nanostructures. It has developed a novel methodology of polymer-free sol-gel route with organometallic chemicals, organic acids and alcohol. LSMO nanotubes, ICO nanowires, and YBCO electrospun nanofibers were synthesized by using several sol-gel viscosities. The samples were heat treated for developing the crystal phase transformation process which was identified by X-ray powder diffraction. The nanostructure morphology was analyzed by scanning electron microscopy, evidencing the formation of nanofibers and nanotubes. The magnetic measurements of each compound were performed by using a SQUID magnetometer. The results indicated that the samples have the crystal phase expected which was confirmed by their magnetic behavior.

MEMBROS DA BANCA:
Presidente - Interno ao Programa - 1552290 - ANDRE SANTAROSA FERLAUTO
Membro Titular - Examinador(a) Interno ao Programa - 1545089 - DANIEL ZANETTI DE FLORIO
Membro Titular - Examinador(a) Externo ao Programa - 1652541 - LETICIE MENDONCA FERREIRA
Membro Titular - Examinador(a) Externo ao Programa - 1671599 - MARCOS DE ABREU AVILA
Membro Suplente - Examinador(a) Interno ao Programa - 1545738 - MARCIA TSUYAMA ESCOTE
Membro Suplente - Examinador(a) Interno ao Programa - 1707133 - ISELI LOURENCO NANTES CARDOSO
Membro Suplente - Examinador(a) Externo ao Programa - 2604737 - EVERALDO CARLOS VENANCIO
Membro Suplente - Examinador(a) Externo à Instituição - MARISSOL RODRIGUES FELEZ - UNIFESP