Nanotubes/biomolecules

version française

Nano-bio-systems

Carbon nanotubes/biomolecules

Responsables:

Patricia BERTONCINI (MC)
Olivier CHAUVET (PR)

Participants:

Patricia BERTONCINI (MC)
Isabelle RIOU (Thèse)
Nicolas PAPAGEORGIOU (Délégation CNRS)
Jean LE BIDEAU (PR)

Summary:

Objectives
Potential applications
CNT / Polysaccharide complexes
Another CNT/Bio-molecules complexes
Collaborations
Publications

Objectives

associate carbon nanotubes and bio-molecules (bio-polymers) non-covalently
disperse CNT in aqueous medium
structure CNT by playing with bio-molecules
reinforce a bio-material thanks to CNT
use CNT as optical transducers

Potential applications:

fundamental studies
bio-sensors
matrices

CNT / Polysaccharide complexes

Fig.1: Wrapping scheme of amylose around a CNT.

Figure 2

Polymer wrapping around a CNT is a promising way to functionalize CNT non-covalently and reversibly for different applications since it does not alter their physical properties. This can also allow the CNT dispersion in aqueous solutions, which is indispensable for biological applications.

In collaboration with H. Bizot and A. Buléon, we are interesting in amylose/CNT system, where amylose is a polysaccharide constituent of starch. Our work deals with the preparation and handle of amylose/CNT complexes. Different preparation routes are used : in aqueous solutions in presence of surfactant molecules, by direct mixing or in presence of non-conventional solvents.

CNT/amylase/surfactant complexes are already been synthesized. The other preparation routes allow the elaboration of different types of complexes, that are currently prepared. This complexation is reversible by enzymatic hydrolysis. Complexation of another polysaccharides are now under study. It is a good starting point for the realization of bio-sensors.

Figure 3: AFM-image...

Another CNT/Bio-molecules complexes

CNT/DNA complexes already successfully synthesized
A collaboration, involving P. Bertoncini and M.H. Ropers (INRA-BIA) is engaged for the elaborating CNT/phospholipids complexes
The study of the interaction between photosensitive membrane proteins and CNT will start soon (resp. P. Bertoncini).

Figure 4: AFM-image of a CNT/DNA complex deposited onto mica.

Figure 5: AFM-image of a CNT/photosensitive membrane proteins Bacteriorhodopsin onto mica.

Collaborations

H. Bizot, A. Buléon, (INRA-BIA)
P. Weiss (LIOAD)

Publications

Amylose/SWNT composites: from solution to film. Synthesis, characterization and properties
P. Bonnet, D. Albertini, H. Bizot, A. Bernard, O. Chauvet
Composites Science and Technology 67, 817 (2007) http://dx.doi.org/10.1016/j.compscitech.2006.01.037

Synthesis and characterization of carbone nanotubes/amylose composites
P. Bonnet, D. Albertini, C. Godon, M. Paris, H. Bizot, J. Davy, A. Buleon, O. Chauvet1
in "Electronic properties of synthetic nanostructures ", ed. By H. Kuzmany, J. Fink, M. Mehring, S. Roth, AIP Conf. Proc. 723, 465(2004)