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Nanotubes and nanohybrids

 

Nano-tubular structures stand as very promising new materials. Several aspects related to their structure and their dynamics are studied in our group, using i) X-ray diffraction (XRD) at our laboratory (see e.g. dedicated X-ray diffraction chamber) and on synchrotron facilities (SOLEIL, ESRF) and ii) inelastic neutron scattering (LLB, ILL). The main topics we are dealing with are:

 

  • Growth mechanisms of carbon nanotubes (CNT). We have developed a multi-scale structural approach combining local probes (TEM, Electron Diffraction, EELS) and global probes (XRD) in order to understand the growth mechanisms of iron-based multiwalled CNT (MWNT) (in coll. with LFP Saclay).

 

  • Correlation between physical properties and structure. We are able to quantify the alignment degree of CNT, either in the form of fibers prepared at CRPP Bordeaux or in the form of carpets synthesized in LFP Saclay, thanks to XRD with millimetric or micrometric beam. We have determined the correlation between the alignment degree and the fibers Young modulus.

 

  • One-dimensional (1D) confinement effects of molecules or crystals inside CNT. The cylindrical cavity inside CNT can be used in order to synthesize original 1D compounds, such as C60 and C70@CNT. We study structural transformations induced by extreme pressure and temperature conditions using XRD, and the modification of the dynamics of confined C60 using neutron scattering.

 

We are also interested in the structural properties of other nano-tubular compounds (double-walled CNT, TiO2, imogolite) to be used for industrial applications (electronics, energy, photography).

 

Permanent staff:
Julien Cambedouzou
Pierre Antoine Albouy
Patrick Davidson
Pascale Launois
PhD student:
Matthieu Chorro
Post-doc: V. Heresanu

 

References listSignificant facts