Nanoporous silicon

(version française)

Nanostructures, Nanocomposites

Nanoporous silicon

Responsables:

Gérard FROYER (PR), Thien-Phap NGUYEN (PR)

Participants:

Philippe LE RENDU
Françoise LARI (T)
Jean-Yves MEVELLEC (IR)
Fady EL HABER (PhD)
Diyana STOYANOVA-BADEVA (PhD)

Summary:

Objectives
Techniques
Contracts and collaborations
Publications list since 2005

Objectives

Create and study new composite materials combining the optical transmission properties of silicon (or silica) with the properties of optically active compounds in order to amplify, regenerate and convert optical signals.

Create and study new biologically active nanocomposite materials

Create and study composites of organic polymers and inorganic compounds (porous Si or porous oxides) to obtain electric or electronic specific properties (condensers, electroluminescent diodes).

Composites de silicium poreux et d’oligomère de poly(phenylène vinylène) :

(A) Oligomère sur silicium poreux après lavage de la surface ;

(B) Oligomère sur silicium poreux ;

C) Oligomère sur silicium

Techniques

XPS
X-ray diffraction and electronic diffraction
Transmission electronic microscopy – Atomic force microscopy
Thermal analysis – specific surface analyses
Spectroscopies (UV-Vis absorption, Infrared, Raman, luminescence, nuclear magnetic resonance)
Electronic transport

Modification of oligomer transmission spectra in porous silicon:

a) oligomer film on a glass layer
b) oligomer on a porous Si layer
c) oligomer inside of the pores of a porous silicon layer.

TEM image of side view and (b) SEM image of the surface of porous silicon layer after treatment to open the pores.

Contracts and collaborations

Lemer-PAX Contrat Cifre 2004-2007

Contrat CNRS-Fapesp (Brésil) 2006-2008

Université H. Poincarré Nancy I
GDR CO2
Laboratoire d’Optronique Lannion (Rennes 1)
LPEC Le Mans (Université du Maine)
LPCMI (Cergy – Pontoise); LPIO (Nantes)
POMA (Angers)
UMR Foton (Lannion)

Principal collaborations :

- Laboratoire des Matériaux Electroactifs, Institut de Chimie et Ecole Polytechnique, Université de Sao Paulo, Brésil

- Université de Technologie Chimique et Métallurgie de Sofia,

Publications list since 2005

Optical properties of poly(2-methoxy, 5-(2’-ethyl-hexyloxy)-phenylene vinylene) deposited on porous alumina substrates., T. P. Nguyen, S. H. Yang, P. Le Rendu, H. Khan, Composites Part A: Applied Science and Manufacturing, 36, 515-519 (2005).

2. Measurements of the third order nonlinear properties of conjugated polymers embedded in porous silicon and silica, C. Simos, L. Rodriguez, V. Skarka, X. Nguyen Phu, N. Errien, G. Froyer, T. P. Nguyen, P. Le Rendu, P. Pirastesch, Physica Status Solidi (C), 9, 3232-3236 (2005).

Nanoscale structural and mechanical characterization of bamboo-like polymer/silicon nano-composite films, H. Ni, X. Li, H. Gao, T. P. Nguyen, Nanotechnology, 16, 1746-1753 (2005).

4. Electrochemical growth of poly(3-dodecylthiophene) into porous silicon layers, N. Errien, G. Froyer, G. Louarn, P. Retho, Synth. Metals, 150, 255-258, (2005)

5. Nanocomposites obtained by embedding of conjugated polymers in porous silicon and silica, N. Errien, L. Vellutini, G. Froyer, G. Louarn, C. Simos, V. Skarka, S. Haesaert, P. Joubert, Phys. Stat. Sol., (C), 2, 3218, (2005)

6. Polymerization of diacetylene-bis(toluenesulfonide) in porous silica :evidence of polymer self-orientation, N. Errien, J-Y. Mevellec, G. Louarn, G. Froyer, Chem. Mater., 17, 215509, (2005)

7. Polymerization of diacetylenic self-assemblies embedded in porous silicon matrix, L. Vellutini, N. Errien, G. Froyer, N. Lacoudre, S. Boileau, F. Tran-Van, C. Chevrot, Chem. Mater., 19, 497, (2007)

8. Surface characterization of porous silicon after pore opening processes, N. Errien, L. Vellutini, G. Froyer, G. Louarn, Applied Surface Science, accepté