Carla Bittencourt

Name Carla Bittencourt
Work Groups Work Group 2 - Characterisation
Laboratory Chimie Inorganique et Analytique
Organisation Université de Mons
Areas of Research surfaces and interfaces
Research Keywords XPS, NEXAFS, graphene based nanostructures, oxides

Areas of Future Interest new tools for nanotechnology

Selected Publications:

Brief CV
Dr. Carla Bittencourt has a PhD in Physics; working under the direction of Prof D. P. Woodruff (University of Warwick –UK) she extended her expertise to Surface Science. She has broad experience in surface analysis, surface modification and film deposition. She joined the LCIA (Laboratory of Analytic and Inorganic Chemistry –University of Mons - Belgium) in November 2006, she is responsible for supervising, directing and contributing to all scientific and technical activities of the LCIA related to optimization of nanostructured materials. She has been involved in several EU and regional projects bridging applied and basic science to device development.

Research fields

2007 - Research programme developed at the “Laboratoire of Chimie Inorganique and Analyses (LCIA)” of the University of Mons-Hainaut and aimed at: a) A deeper understanding of irradiation effect on electronic properties of nanostructures; b) The functionalisation of surfaces; c) The band gap engineering of nanostructures through functionalisation; d) The development of nano-tools and strategies to study single nano-objects; e) Atomic-scale metal-nanostructure interface design.

2003 - 2006 Present research focused on metal clusters and their interaction with nanoscale structures, in particular pristine and plasma-treated carbon nanotubes. This has led to a wide range of new hybrid nanostructured materials and new perspectives on the mechanism of nanosensors.

2001 - 2002 The observation of metal atom diffusion towards the surface of metal-oxide films during annealing inspired the research on the electronic structure of bimetallic surface alloys. The use of synchrotron radiation facilities allowed investigation of hybridization between electronic states of Pt and Sn, as well as Sb and In.

2000 – 2001 The addition of noble metals such as Pt, Pd, and Ag at the surface of metal-oxide films proved to decrease the operating temperature of sensors significantly, to enhance their sensitivity to some gases of interest, and to reduce their response time. Due to the improvement found, the use of metal oxides as active material for gas sensing is widely related to their use with catalytic metals. The addition of noble metals results in changes in the electronic states of the active layer. The mechanisms by which a metal atom interacts with the metal-oxide matrix are extremely varied and complex. The use of advanced characterization techniques (e.g. AFM, SEM, XPS, and UPS) to study doped metal oxides films, as grown and annealed, allowed determining growth parameters that improve gas-sensing selectivity towards selected gases.

1998 – 1999 Research focused on the use of low-energy electron diffraction (LEED) and normal incidence x-ray standing-wave spectroscopy (NIXSWS) to study the interaction of molecules and atoms with the surface of metal substrates. This study showed that surfactant-mediated growth is influenced by the surface reconstruction of the substrate.

1994 - 1997 Study of Electronic States and Valence band discontinuities in heterojunctions. i) Investigation of the influence of growth parameter on the formation of Si/SiC heterojunctions – samples were prepared using PA-CVD. ii) Raman spectroscopy of intermolecular interactions, iii) Atomic force microscopy to follow interface formation and iii) Photoelectron Spectroscopy for valence band discontinuity determination. In particular the use of Low-Energy Yield Spectroscopy was a pioneering study that initiated the use of photoemission spectroscopy as a novel technique for determining band-offsets in heterojunctions with Stranski- Krastanov growth.