We present a review of our most recent work concerning the electronic and optical properties of several low-dimensional systems of anatase TiO2. First, we describe the analysis of the (001) minority surface of anatase, for which we offer evidence of improved photoactivity as function of the reconstruction. We then describe the analysis of bilayers of anatase, (001)-oriented and lepidocrocite type, and confirm the experimentally reported excitonic nature of their optical spectra. The primary role that packing plays in the optical properties of such layered systems is also revealed. Finally, we focus on the structural and electronic features of nanocomposites formed by anatase (001)-oriented bilayers and graphene. Interesting differences between chemisorbed and physisorbed heterostructures are found.
Electronic and Optical Properties of Low-Dimensional TiO2: From Minority Surfaces to Nanocomposites
GIORGI, Giacomo
;
2015
Abstract
We present a review of our most recent work concerning the electronic and optical properties of several low-dimensional systems of anatase TiO2. First, we describe the analysis of the (001) minority surface of anatase, for which we offer evidence of improved photoactivity as function of the reconstruction. We then describe the analysis of bilayers of anatase, (001)-oriented and lepidocrocite type, and confirm the experimentally reported excitonic nature of their optical spectra. The primary role that packing plays in the optical properties of such layered systems is also revealed. Finally, we focus on the structural and electronic features of nanocomposites formed by anatase (001)-oriented bilayers and graphene. Interesting differences between chemisorbed and physisorbed heterostructures are found.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
