Puech P. – TechConnect Briefs

Correlating electrical and structural properties in surface layer of carbon nanotube polymer composite

Pavlenko E., Tishkova V., Puech P., Bacsa W.S., CNRS and University of Toulouse, FR

We have recently shown that annealing of agglomerated carbon nanotubes on thermoplast polymers form surface composite films (70 micrometers) (1). This has been explained by preferential carbon nanotubes absorption of infrared radiation leading to local [...]

Effect of doping on the radial breathing mode of carbon nanotubes

Gerber I.C., Puech P., Gannouni A., Bacsa W.S., CEMES-CNRS, FR

Doping CNTs is an attractive alternative to control the electronic conductivity of CNTs independent of their diameter. Highly conducting nanotubes are of interest for applications in transparent thin film electrodes. When doping CNTs through substitution [...]

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 [...]

Heating double wall carbon nanotubes with UV photons

Puech P., Bassil A., Flahaut E., Bacsa W.S., University Paul Sabatier, FR

Light absorption leads inevitably to electronic excitation and inelastic electron scattering, creating phonons and resulting in the increase of the lattice temperature. By using photons with energies significantly above the fundamental band gap of the [...]

Diagnostics of carbon nanotube composites by Raman spectroscopy

Puech P., Bassil A., Barrau S., Demont P., Bacsa R.R., Bacsa W.S., Flahaut E., Bacsa R.R., Bacsa W.S., University Paul Sabatier, FR

Carbon nanotube polymer composites are very promising for applications due to their exceptional mechanical and electronic properties to improve the elastic properties of polymers or to make polymers conductive. The large surface of carbon nanotubes [...]

Structural and Mechanical Properties of Double Wall Carbon Nanotubes

Bacsa R.R., Bacsa W.S., Flahaut E., Laurent Ch., Peigney A., Puech P., Bacsa R.R., Bacsa W.S., LPST Université Paul Sabatier, FR

Narrow diameter double walled carbon nanotubes can now be grown by the catalytic chemical vapor deposition process with high yield. Double walled carbon nanotubes are the molecular analogs to coaxial cables and they can also [...]