Abstract: We report on the growth and transport properties of single crystalline Sb doped SnO2 wires grown from chemical vapour deposition. While undoped samples presented semiconducting behaviour, doped ones clearly undergo a transition from an insulating state (dR/dT < 0) to a metallic one (dR/dT > 0) around 130-150 K depending on the doping level. Data analysis in the framework of the metal-to-insulator transition theories allowed us to investigate the underlying physics: electron-electron and electron-phonon interactions were identified as the scattering mechanisms present in the metallic phase, while the conduction mechanism of the semiconducting phase (undoped sample) was characterized by thermal activation and variable range hopping mechanisms. Published by AIP Publishing.
Author(s):Costa, I. M.; Bernardo, E. P.; Marangoni, B. S.; et al.
O Laboratório Aberto de Interatividade para Disseminação do Conhecimento Científico e Tecnológico (LAbI), vinculado à Universidade Federal de São Carlos (UFSCar), é voltado à prática da divulgação científica pautada na interatividade; nas relações entre Ciência, Arte e Tecnologia.
Comparative Analysis of Photoluminescence and Upconversion Emission from Individual Carbon Nanotubes for Bioimaging Applications Abstract: Luminescent single-walled carbon nanotubes (SWCNTs) are unique nanoemitters that allow near-infrared single-molecule detection within biological tissues. Interestingly, the recent discovery of […]
Mechanism of Antibacterial Activity via Morphology Change of alpha-AgVO3: Theoretical and Experimental Insights Abstract: The electronic configuration, morphology, optical features, and antibacterial activity of metastable alpha-AgVO3 crystals have been discussed by a conciliation and association of […]