Synthesis of one-dimensional ceramic nanostructures: characterizations and devices applications
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, YBa2Cu3O7-δ(YBCO), La1-xSrxMnO3(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.