Bacsa W. – TechConnect Briefs

Review of Double Wall Carbon Nanotubes, Synthesis and Applications (overview presentation)

Bacsa W., University of Toulouse, FR

We find that the Raman G band for individual double wall carbon nanotubes is split when the two walls are closely spaced or strongly coupled. We show that agglomeration of tubes into bundles leads to [...]

Structure-Property Correlations in ZnO Tetrapods and Spheres prepared by Chemical Vapour Synthesis

Bacsa R., Bacsa W., Verelst M., Dexpert J., Bacsa R., Bacsa W., Serp P., CEMES CNRS Univ Toulouse, FR

ZnO is a direct band gap semiconductor that finds applications in varistors and arrestors. Efficient luminescence in the UV of high purity nanocrystalline ZnO nanoparticles (20-50nm) is used in medicine and in the cosmetic industry [...]

Raman study and DFT calculations of amino acids

Sonois V., Estève A., Zwick A., Faller P., Bacsa W., CEMES CNRS Univ Toulouse, FR

Previously we reported intense and narrow vibrational Raman bands of the amino acid histidine grown from droplets of aqueous histidine on silica (Sonois et al., 2007, Chem. Phys. Lett., 439, 360-363). In the present communication [...]

Chemical doping by sulfuric acid in double wall carbon nanotubes

Puech P., Ghandour A., Sapelkin A., Flahaut E., Dunstan D., Bacsa W., CEMES CNRS Univ Toulouse, FR

Charge transfer due to chemical doping in carbon nanotubes [1] can be detected through changes in the band shape and spectral shifts of the Raman G-band. In double wall carbon nanotubes, the inner tube is [...]

Inelastic Light Scattering and Light Emission of Individual and Suspended Carbon Nanotubes

Yin Y., Cronin S., Walsh A., Stolyarov A., Tinkham M., Vamivakas A., Bacsa R.R., Bacsa W., Ünlü S., Goldberg B., Swan A., Bacsa R.R., Bacsa W., Boston University, US

Carbon nanotubes represent an important model system in nanoscience and nanotechnology. The tubes are essentially one-dimensional, typically 1-2 nm in diameter and up to 1 mm long and combine nanoscale and macroscopic physics. Besides their [...]