Mathieu Edely

Mathieu Edely
Université du Maine · Institut des Molécules et des Matériaux du Mans (IMMM)

PhD

About

40
Publications
5,539
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396
Citations

Publications

Publications (40)
Article
Titanium dioxide TiO 2 (TO) and bismuth vanadate BiVO 4 (BVO) are promising photoactive semiconducting oxides for heterogeneous photocatalysis devoted to water treatment, pollutant degradation and water splitting processes.
Article
Since the discovery of Surface Enhanced Raman Spectroscopy (SERS) and the proven ability for this technique to detect molecules at trace level, numerous techniques have been reported for fabricating substrates that ensure reliable and reproducible SERS signal on its whole surface. In this paper we studied the capabilities and sensing performances o...
Article
We study the interaction between one aptamer and its analyte (the MnSOD protein) by the combination of surface-enhanced Raman scattering and multivariate statistical analysis. We observe the aptamer structure and its evolution during the interaction under different experimental conditions (in air or in buffer). Through the spectral treatment by pri...
Poster
Titanium dioxide (TiO 2) and Bismuth vanadate (BiVO 4) are well established compounds in the realm of visible light driven photocatalysis. As part of their extension into the real-life application, the fabrication of heterojunction thin films by sputtering technique has been achieved and further thermal treatment allowed the growth of the desired p...
Article
Full-text available
The surface enhanced Raman scattering (SERS) efficiency of gold nanocylinders deposited on gold thin film is studied. Exploiting the specific plasmonic properties of such substrates, we determine the influence of the nanocylinder diameter and the film thickness on the SERS signal at three different excitation wavelengths (532, 638 and 785 nm). We d...
Article
An efficient methodology based on scanning probe lithography technique to design complex metallic nanostructures on rigid or flexible substrates is reported. This maskless method is based on an atomic force microscopy nanoindentation technique for engraving predetermined patterns on a polymer film and creating inverted patterns on the metal surface...
Article
Elaborating advanced nanomaterials based on the assembly of nanoparticles (NPs) is a versatile route for targeting and tuning a wide variety of properties like optical, magnetic, electrical properties or sensing. This route usually employs a so-called soft chemistry which has the advantage to be quite cheap and transferable to an industrial level....
Thesis
Depuis la première observation du phénomène de Diffusion Raman Exaltée de Surface (DRES) en 1974 de nombreuses méthodes ont été développées pour contrôler l'arrangement de nanostructures métalliques sur une surface dans le but d'augmenter le signal de diffusion Raman. La valeur du facteur d'amplification de la DRES résulte principalement de l’accro...
Article
Raman spectroscopy including mapping technique appears as a powerful technique for the characterization of polymer blends like thermoplastic elastomers (TPEs) and thermoplastic vulcanizates (TPVs). The Raman spectra of polymers blends such as natural rubber/polypropylene (NR/PP) and 65% hydrogenated natural rubber/polypropylene (65%HNR/PP) were ide...
Article
Full-text available
The ability to generate efficient giga-terahertz coherent acoustic phonons with femtosecond laser makes acousto-optics a promising candidate for ultrafast light processing, which faces electronic device limits intrinsic to complementary metal oxide semiconductor technology. Modern acousto-optic devices, including optical mode conversion process bet...
Data
Supplementary Figures 1-7, Supplementary Notes 1-4 and Supplementary References
Article
This paper discusses a method to measure the thickness of thin layers deposited on a reflective substrate. An interferometer with three wavelengths produces color interferences. A color sensor records the tint that is produced. The color interferences are approximated by a model based on the measurement of the laser intensities obtained with the re...
Conference Paper
This paper discusses a method to measure the thickness of thin layers deposited on a reflective substrate. A Michelson type interferometer with three wavelengths produces color interferences. A color sensor records the tint that is produced. The color interferences are approximated by a model based on the measurement of the laser intensities obtain...
Article
Nickel titanate (NiTiO3) thin films were grown by a radio frequency magnetron co-sputtering process using metal (Ni and Ti) targets on fused quartz substrates at a substrate temperature of 400 °C. Annealing of as-deposited (amorphous) films was performed at 1100 °C for 2 hours to realize a stable crystalline phase. The effect of the Ti target power...
Article
Full-text available
Extracting characteristic dimensions from mounded surfaces such as grain size or intergrain lengths is usually made by statistical analysis. Different statistical functions are used in the literature to extract characteristic lengths. The main issue is that depending of the choice of the statistical function the results can be very different. In th...
Article
Thin films based on silicon carbide and alumina were synthesized by means of rf-sputtering using a co-deposition process. Several nanostructures were created which consist of thin films (∼200nm thick) with homogeneous distribution of SiC nanocrystals (∼5nm mean diameter) in the host alumina matrices. Characterization methods including X-ray photoel...
Article
Full-text available
We report on the process formation of EuNiO3 thin films on various substrates, studies of optimization conditions for synthesis process and primary investigation. EuNiO3 thin films were deposited by Radio Frequency Magnetron Sputtering in Ar-O atmosphere using a ceramic target with additional nickel pellets. We used Si, NdGaO3 and SrTiO3 substrates...
Article
Full-text available
Laser ultrasonics was applied to the manufacturing control of the quality and integrity (no failure) of coated spherical particles designed for High Temperature Reactors (HTR). The coating of the nuclear fuel kernel is designed to prevent from the diffusion of fission products outside the particle during reactor operation. The quality assessment of...
Article
Full-text available
Several strategies were developed to synthesise two classes of nanostructured thin films with nanocrystals of SiC (nc-SiC) or In2O3 (nc-In2O3) confined in alumina. The syntheses were performed by using Rf-sputtering and co-pulverisation process of the suitable reactants. Thus, Al2O3/nc-SiC and Al2O3/nc-In2O3 composite thin films were obtained and t...
Article
Nanocrystals of indium oxide (In2O3) with sizes below 10 nm were prepared in alumina matrixes by using a co-pulverization method. The used substrates such as borosilicate glasses or (100) silicon as well as the substrate temperatures during the deposition process were modified and their effects characterized on the structural and physical propertie...
Article
Full-text available
Photoelectron spectroscopy studies of correlated electron EuNiO3 compound have revealed a significant temperature dependence of Ni 2p multiplets. In particular, clear evidence of Ni 2p multiplet splitting is reported not only below the metal-insulator transition (MIT), as expected, but also, although smaller in magnitude, above MIT. This electronic...
Article
Rare earth nickelates exhibit a reversible metal-semiconductor phase transition that is, in the infrared range, responsible for a thermo-optical contrast. The state of the art synthesis of these compounds usually requires high oxygen pressure to stabilize Ni in the oxidation state 3{sup +}. In this work, using polymeric precursor associated with mo...
Article
Full-text available
The experimental detection of short picosecond photoacoustic response induced by femtosecond laser pump radiation deeply penetrating in GaAs and generating long acoustic strain pulse is reported. It is demonstrated that it is possible, in this case, to achieve high-frequency coherent acoustic phonon monitoring in semiconductors as efficiently as in...
Article
Nd0.3Sm0.7NiO3 exhibits a reversible metal semiconductor phase transition which is, in the infrared range, responsible of a thermo-optical contrast. The variation of the thermal emittance for Nd0.3Sm0.7NiO3 ceramic was measured, in the mid-infrared range, by using reflectance measurements and on a benchtest. The thermo-optical effect of the sample...
Article
Bisphosphonates form self-assembled monolayers (SAMs) spontaneously on stainless steel, silicon, and titanium oxidized surfaces. We used contact angle measurements, atomic force microscopy, and X-ray reflectivity analysis to study the formation of SAMs on a model surface of ultraflat titanium (rms = 0.2 nm). The results were extended to standard ma...
Article
Nd0.3Sm0.7NiO3 ceramic has been synthesised using a sol-gel method and annealing at oxygen pressure. Nd0.3Sm0.7NiO3 exhibits a reversible metal insulator phase transition which is, in the infrared range, responsible of a thermal-optical contrast. Samples are structurally characterized by X-ray diffraction and thermogravimetric analysis. The Nd0.3Sm...
Article
Full-text available
The porous materials with the characteristic dimensions of the pores from few nanometers up to a few hundred of nanometers find applications in microelectronic industry (as low-k materials), in photovoltaics and for developing of effective chemical sensors. When the pores are ordered in a spatially periodic structure, these systems present photonic...
Article
Experimental results on the generation and the detection by fs laser pulses of the acoustical phonons at frequencies from tens to hundreds GHz in GaAs in the presence of external electric field are presented. The influence of the magnitude and the direction of the applied electric field on the parameters of ps ultrasound is investigated. Results ob...
Article
We report on the results of the generation and detection by femtosecond laser pulses of the acoustic waves at frequencies of tens to hundreds GHz in semiconductors and in oxides compounds exhibiting phase transition. We focus first on the generation mechanisms involved to achieve opto-acoustic transformations. Particular attention will be paid to t...
Article
A simple procedure to elaborate robust ultraflat gold surface without clean room facilities is presented. Self-assembled 3-mercaptopropytriethoxysilane (MPTMS) on silicon was used as a buffer layer on which gold was sputtered using a common sputter-coating apparatus. The optimization of the sample position into the chamber of the sputtering machine...
Article
Nd0.3Sm0.7NiO3 ceramic has been synthesised using a sol-gel method and annealing at oxygen pressure. Nd 0.3Sm0.7NiO3 exhibits a reversible metal insulator phase transition which is, in the infrared range, responsible of a thermal-optical contrast. Samples are structurally characterized by X-ray diffraction and thermogravimetric analysis. The Nd0.3S...
Article
Full-text available
We first describe the picosecond acoustic interferometry study of GaAs with two-colors pump-probe laser pulses. The dependence of the generation process on the pump wavelength and the detection process on the probe wavelength both can cause the shift in the phase of the Brillouin signal. Secondly, in order to distinguish the short high frequency wi...
Article
Full-text available
The method of time-resolved polarimetry has been employed to monitor picosecond acoustic pulses. The technique is able to resolve longitudinal and shear echoes separated by less than 10ps. A proper choice of the incident polarization state gives the opportunity to tune the sensitivity to a particular acoustic mode.

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