Michael Canva - Profile on Academia.edu (original) (raw)

Papers by Michael Canva

External Force are required to effectively kill bacteria on mechano-bactericidal nanopillars

HAL (Le Centre pour la Communication Scientifique Directe), Oct 26, 2020

Quantitative Modeling of Ultrafast Thermal Phenomena in Plasmonic Structure

HAL (Le Centre pour la Communication Scientifique Directe), May 1, 2020

Tracking ultra-fast heat transfer inside cross-shaped nanoparticles

HAL (Le Centre pour la Communication Scientifique Directe), Jun 16, 2022

Intraparticle Heat Transfer inside Cross-shaped Nanoparticles Revealed by Femtosecond Transient Spectroscopy

HAL (Le Centre pour la Communication Scientifique Directe), Aug 29, 2022

Intraparticle ultra-fast heat transfer revealed by femtosecond transient spectroscopy

HAL (Le Centre pour la Communication Scientifique Directe), May 1, 2021

Combining SPRI and SERS with innovative nanostructured biochips (Orale)

International audienc

Direction surface Enhanced Raman scattering on gold nano-gratings (Orale)

HAL (Le Centre pour la Communication Scientifique Directe), Oct 12, 2015

International audienc

2T model to spatially and temporally study heat propagation in nanostructured gold films

HAL (Le Centre pour la Communication Scientifique Directe), Jun 17, 2019

International audienc

Nanostructuration de film d’or sur verre pour la biodétection par diffusion Raman exaltée de Surface et résonance de plasmon de surface (Orale)

HAL (Le Centre pour la Communication Scientifique Directe), Jul 6, 2015

National audienc

Modeling of hybrid surface plasmon modes in metallic nanostructures and application to SPRI/SERS biosensing (Orale)

HAL (Le Centre pour la Communication Scientifique Directe), May 24, 2016

International audienc

Combining Surface Nanostructuration and Surface Chemistry at the Submicronic Scale: Towards a Bimodal SPRI / SERS Biosensor

International audienc

Next generation of Nanostructured Biochips for a bimodal SPRI-SERS detection

International audienc

Next generation of biochips for SPRI, SERS and bio-imaging: taking advantage of hydrid plasmonics modes

International audienc

Mechanisms of heat propagation on nanostructured gold films mediated by propagative and localized surface plasmons

International audienc

Nanopillars are known to mechanically damage bacteria, suggesting a promising strategy for highly... more Nanopillars are known to mechanically damage bacteria, suggesting a promising strategy for highly-effective anti-bacterial surfaces. However, the mechanisms underlying this phenomena remain unclear, which ultimately limits translational potential towards real-world applications. Using real-time and end-point analysis techniques, we demonstrate that in contrast to expectations, bacteria on multiple “mechano-bactericidal” surfaces remain viable, unless exposed to a moving air-liquid interface which caused considerable cell death. Reasoning that normal forces arising from surface tension may underlie mechano-bactericidal activity, we developed computational and experimental models to estimate, manipulate, and recreate the impact of these forces. Our experiments together demonstrate that nanopillar surfaces alone do not cause cell death, but require a critical level of external force to deform and rupture bacteria. These studies hence provide fundamental physical insight into the mechan...

Japanese Journal of Applied Physics, 2019

This paper reports on the design and characterization of a silicon nitride ring resonator-based d... more This paper reports on the design and characterization of a silicon nitride ring resonator-based device for biosensing manufactured with the STMicroelectronics 300 mm R&D Datacom Advanced PHotonic Nanoscale Environment (DAPHNE) industrial platform. The experimental results demonstrate a 300 nm/RIU bulk sensitivity and a 0.125 nm resonant peak shift per nanometer of biological adlayer thickness change. These results, comparable to the state of the art in ring resonator-based biosensors, demonstrate the potential of the DAPHNE industrial platform for manufacturing high-performance photonics biosensors at low cost.

The Journal of Physical Chemistry C, 2016

Plasmonic properties of arrays of gold nanodisks were investigated in order to study the localiza... more Plasmonic properties of arrays of gold nanodisks were investigated in order to study the localization of the near-field enhancement at the surface of the nanodisks. To measure the near field, Surface enhanced Raman spectroscopy (SERS) was performed on different kind of substrates with and without an over layer of silica that disabled the possibility for our SERS probe to adsorb on the top of our structures. Thanks to this we were able to determine, depending on the substrate, which fraction of the SERS enhancement was coming from the top of our structures. We demonstrate that the near-field enhancement is mainly localized at the top of the nano disks in the case of dielectric substrate whereas it comes from the nanodisk side for metallic subfilm substrate.

Sensors and Actuators B: Chemical, 2016

We report on an improvement way of the SERS signal of Au triangular nanoprisms for a highly sensi... more We report on an improvement way of the SERS signal of Au triangular nanoprisms for a highly sensitive detection of chemical molecules. This improvement is obtained by a simple addition of a gold reflective layer under Au nanoprisms. Using the same Au triangular nanoprisms obtained by nanosphere lithography, we studied experimentally the thickness effect of this gold underlayer on the SERS intensity of the triangular nanoprisms. We demonstrated that this SERS intensity increased with the thickness of the gold reflective underlayer, and this is due to the increment of the Au underlayer reflectivity. Thus, we showed that the metallic reflective underlayer has an important key for SERS enhancement. Indeed, enhancement factors of 10 8 were found for the most important thickness of the gold underlayer.

Physical Review B, 2020

In this work, a pump-probe experiment is used to study the ultrafast dynamics of heat transfer in... more In this work, a pump-probe experiment is used to study the ultrafast dynamics of heat transfer in thin gold films and gold nanostructures on glass substrates, following local heating by ultrashort laser pulses. Full spectrotemporal differential reflectivity and transmission maps were obtained for different film thicknesses (30, 50, 80, 150, and 200 nm) and different laser fluences (0.38 to 9.5 Jm −2). For arrays of gold nanorods, the two orthogonal probe polarizations were also acquired. We propose an improved model for these phenomena based on a modified two-temperature model that integrates thermal conduction and the three-dimensional finite element method model to link the spatiotemporal temperature maps to the spectrotemporal optical response maps. The impact of an underlying titanium adhesion layer is reported. Excellent agreement between numerical and experimental data for both the gold films and the nanostructures is shown.