1. FUNCTIONNALIZATION OF CARBON NANOTUBES
Capping, coating and introduction of single silicon nanocrystals into multiwall carbon nanotubes
V. Švrček1*, F. Le Normand2, O. Ersen2, C Phan-Huu1, D. Begin1, J.C. Muller3, M-J. Ledoux1
1LMSPC-ECPM, 25, rue Becquerel, F67087 Strasbourg, France
2IPCMS, 23 rue du Loess, F Strasbourg, France,
3CNRS-PHASE, 23 rue du Loess, F Strasbourg, France
*JSPS fellowship Nanoarchitectonics Research Center, AIST, Central 5, Higashi, Tsukuba, Japan
MOTIVATIONS
Silicon nanocrystals (Si-ncs) have new fundamental characteristics (optical properties in 1D system) for direct applications (LED, laser, etc)
Colloidal Si-ncs combined with carbon nanotubes (CNTs) as nano-reservoir can open new possibilities i.e biological applications (delivery agent)
Formation of new hybrid nanostructures based on Si-ncs/CNTs by filling, coating, or capping
FUNCTIONNALIZATION OF CARBON NANOTUBES
Si-ncs are prepared by electrochemical etching of Si wafer
(p-type, <100>, 0.1 Ohm.cm), mechanical pulverization
and sedimentation
Incorporated into silicon dioxide (SiO2) based liquid spin
on glass (SOG) (planarization and/or surface passivation,
commercially available)
Opening, cappimg and coating CNTs
Filling CNTs at room temperature
CNTs commercially available, with different diameters
Ends opened at 530 C, 590 C, 580 C at O2 atmosphere.
Theoretical calculations surface tension < 200 mN/m
enter to the inner cavity no semiconductors (high T)
Preparing colloidal Si-ncs in
organic solutions allows overcome
such a problems.
SOG and methanol-based
solution lower the surface tension
colloidal Si-ncs in SOG diluted
with methanol
thin film on CNT
Si-ncs introduced inside CNTs channel through capillary
effect
CONCLUSIONS
SOG organic based filling, capping, coating CNTs Si-ncs/SOG//CNTs as one dimensional systems study peculiar physical phenomena (photoluminescence)
Approach help to localize and manipulate with single Si-nc that offers a unique possibility to fabricate very solid and flexible single Si-nc-based nano-devices
(V. Švrček,, O. Ersen, S. Joulie, C Phan-Huu, J. Amadou, D. Begin, M-J. Ledoux and F. Le Normand, Appl. Phys. Lett (2006), J. Appl. Phys. 99, 1 (2006))