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Interaction of gases with black phosphorus

Grant number: 16/06798-2
Support type:Scholarships in Brazil - Master
Effective date (Start): September 01, 2016
Effective date (End): February 28, 2018
Field of knowledge:Physical Sciences and Mathematics - Physics - Condensed Matter Physics
Principal Investigator:Tulio Costa Rizuti da Rocha
Grantee:Gabriel Pereira Freitas
Home Institution: Centro Nacional de Pesquisa em Energia e Materiais (CNPEM). Ministério da Ciência, Tecnologia, Inovações e Comunicações (Brasil). Campinas , SP, Brazil

Abstract

Black Phosphorus is a material with lamellar structure that can be exfoliated down to a single atomic layer, arising the 2D material known as phosphorene. The peculiar electronic structure with a direct bandgap in the visible range and high density of carriers makes phosphorene an enabling material for the production of optoelectronic devices with reduced dimensions, however the technological development has been limited by the photo-oxidation of phosphorene under ambient conditions. In this work, we will address the interaction of gases with the surface of black phosphorus aiming for direct experimental evidences about atomistic processes at the solid-gas interface. We will use a combination of surface science techniques to probe the chemical composition and atomic structure of the black phosphorus' surface before and after the adsorption of gases. The electronic structure of the oxide and the photo-oxidation mechanisms will be investigated by synchrotron bases in situ techniques. The new information about the interface process at the atomic scale contribute to expand our understanding the device degradation mechanisms and strategies to mitigate it. In addition, we will investigate emerging new application exploiting the interaction of gases with black phosphorus, such as light induced doping and the photocatalytic oxidation of atmospheric pollutants