Project name: Sensors based on tungsten oxides cluster-assembled structures obtained by laser and plasma methods for nitrogen oxides detection
Contract no. 100 / 2012-01-12
Project code: PN-II-RU-PD-2011-3-0115
PN II Program Name: Human Resources
Subprogram: Post-doctoral research project
Contracting authority: Executive Agency for Higher Education, Research, Development and Innovation Funding
Project director: Mihaela FILIPESCU
Contract value: 288,103 lei
Contract duration: 23 luni
Coordinator: National Institute for Lasers, Plasma, and Radiation Physics
Project summary:
Nowadays, due to
the industrial development, the environment’s pollution became a serious issue.
Air pollution represents a major problem for the ecosystem due to the release of
chemicals and particulates into the atmosphere. Tungsten oxides are a class of
versatile materials used in gas sensors (O3, H2, H2S,
Cl2), photo-catalysis, window for solar cells, electronic information
displays and color memory devices etc. In particular, tungsten oxide showed
superior sensitivity and selectivity in detecting NO2 gas. The
project here presented proposes the use of alternative technologies with laser
and plasma, namely Radio-Frequency plasma beam assisted pulsed laser deposition,
for the obtainment of nanostructured tungsten oxides with high sensitivity to
toxic gases. The material properties will be investigated and sensor tests will
be carried out. This research aims to develop a reliable method to grow WOx
as cluster assembled films with high specific area and controlled dimension size,
for applications in toxic gases (nitrogen oxide) detection in order to combat
air pollution.
Project objectives:
The *general objective* of this project is to synthesize WOx nanostructures (clusters assembled, nanostructured thin films) using lasers and plasma methods, for applications in toxic gases (nitrogen oxide) detection in order to combat air pollution.
First stage -
31.12.2012
(click
for the scientific report)
Dissemination
1) article:
M. Filipescu, V. Ion, D. Colceag, P. M. Ossi, M. Dinescu, Growth and
characterizations of nanostructured tungsten oxides, Romanian Reports in
Physics, Vol. 64, Supplement, P. 1213–1225, 2012
2) poster: M. Filipescu, D. Colceag, V. Ion, R. Birjega, M. Dinescu, P. M. Ossi,
Growth and characterizations of nanostructured tungsten oxides obtained by laser
ablation, Conferinta ICPEPA-8, Rochester – SUA, 12-17 August 2012
Second stage - 13.12.2013 (click for the scientific report)
Dissemination
1) poster: M. Filipescu, R. Birjega, M.D. Dumitru, P. M. Ossi, M. Dinescu,
Structural and morphological evolution of nanostructured tungsten oxide grown by
radio-frequency discharge assisted laser ablation, EMRS Conference, Strasbourg -
France, 27-31 May 2013
2) article: M. Filipescu, V. Ion, S. Somacescu, B. Mitu, M. Dinescu,
Investigation of Ta2O5 and TaSixOy thin films obtained by radio frequency plasma
assisted laser ablation for gate dielectric applications, Applied Surface Science
276 (2013) pp. 691-696
3) oral presentation: V. Ion, M. Filipescu and M. Dinescu, Optical properties of
tungsten oxide thin films obtained by pulsed laser deposition, 20-24 May 2013
Bran, Romania
4) oral presentation: M. Dumitru, M. Filipescu, R. Birjega and M. Dinescu, X-Ray
diffraction studies on tungsten oxide thin films obtained by pulsed laser
deposition, 20-24 May 2013 Bran, Romania
5) poster: M. Filipescu, V. Ion, R. Birjega, M.D. Dumitru, M. Dinescu, Growth of
nanostructured tungsten oxide thin films by radio-frequency plasma assisted
laser ablation, 16th CPPA International Conference, Bucharest -- Romania,
20-25 June 2013
6) poster: M. Filipescu, A. Matei, V. Ion, F. Stokker-Cheregi, P. M. Ossi, M.
Dinescu, Thin Films of Tungsten Oxide Nanoparticles Embedded in Polyaniline
Matrix by MAPLE Technique for Sensors Application,
COLA International Conference, Ischia-Italy, 6-11 October 2013