Title :

Raman Imaging and Kelvin Probe Microscopy for the Examination of the Heterogeneity of Doping in Polycrystalline Boron-Doped Diamond Electrodes

Author(s) :

Szunerits, Sabine [Auteur correspondant]
Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces [LEPMI ]
Mermoux, Michel [Auteur]
Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces [LEPMI ]
Crisci, Alexandre [Auteur]
Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces [LEPMI ]
Marcus, Bernadette [Auteur]
Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces [LEPMI ]
Bouvier, Pierre [Auteur]
Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces [LEPMI ]
Delabouglise, Didier [Auteur]
Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces [LEPMI ]
Petit, Jean-Pierre [Auteur]
Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces [LEPMI ]
Janel, Sébastien [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Institut de Recherche Interdisciplinaire [Villeneuve d'Ascq] [IRI]
Boukherroub, Rabah [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Institut de Recherche Interdisciplinaire [Villeneuve d'Ascq] [IRI]
Tay, Lilin [Auteur]
Institute for Microstructural Sciences [NRC - IMS]

Journal title :

Journal of Physical Chemistry B

Pages :

pp. 23888-23897

Publisher :

American Chemical Society

Publication date :

2006-11-30

ISSN :

1520-6106

HAL domain(s) :

Chimie/Matériaux

English abstract : [en]

The issue of the heterogeneity of boron doping in microcrystalline diamond films was addressed by four different methods: micro-Raman spectroscopy and Raman imaging, Kelvin probe force microscopy, conducting atomic force ...
Show more >The issue of the heterogeneity of boron doping in microcrystalline diamond films was addressed by four different methods: micro-Raman spectroscopy and Raman imaging, Kelvin probe force microscopy, conducting atomic force microscopy, and scanning electrochemical microscopy. The samples were commercially available films from Windsor Scientific, with an average boron concentration of about 5 × 10²⁰ cm^-3. In agreement with previous works, all of the methods showed that the boron uptake was nonuniform across the surface of the electrode. Two different types of regions were evidenced, with metallic or semiconducting properties that were characterized with different types of Raman spectra. The line shape of these spectra was strongly dependent on the excitation wavelength. Local variations in electroactivity were evidenced by the SECM curves, which are related to the electronic properties of the individual grains, which, in turn, are governed by the boron content of the individual crystallites. In this study, two different micro-Raman imaging techniques were used that reveal the grain structure of the films: the images constructed from the diamond line intensity perfectly reproduced the optical image obtained by illuminating the sample in reflection. The method also allows detection of the presence of nondiamond carbon, especially in the metallic parts of the samples. Other spectral features (intensity of the boron-related broad lines, as well as the frequency and width of the diamond line) were used to construct images. In every case, the grain structure of the film was revealed, as well as twinning within individual crystallites. All approaches revealed that no enhanced doping or boron depletion occurred at the grain boundaries.Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL