Now showing items 1-20 of 20

  • Raman-based mapping and depth-profiling of the relaxation state in amorphous silicon 

    Lussier, Alexandre W.; Bourbonnais Sureault, David; Chicoine, Martin; Martel, Richard; Martinu, Ludvik; Roorda, Sjoerd; Schiettekatte, François (American Institute of Physics, 2024-02-09)
    We show that the micro-scale variations in the relaxation state of amorphous silicon (aSi) can be well-identified by Raman mapping over hundreds or thousands of µm2 in 1-2 hours. Pure and relaxed a-Si is obtained by self-implantation in crystalline ...
  • Formation of crystalline Si1-xGex top layers by ion implantation in crystalline silicon 

    Nélis, Adrien; Chicoine, Martin; Schiettekatte, François; Terwagne, Guy (Elsevier, 2023-02-27)
    Semiconductor nanocrystals incorporated in a dielectric film are widely studied as potential candidates to exceed the Shockley-Queisser theoretical conversion limit of photovoltaic cells. In this context, Ge nanocrystals embedded in SiO2 films seem to ...
  • Molecular interactions of tannic acid with proteins associated with SARS-CoV-2 infectivity 

    Haddad, Mohamed; Gaudreault, Roger; Sasseville, Gabriel; Nguyen, Phuong Trang; Wiebe, Hannah; Van De Ven, Theo; Bourgault, Steve; Mousseau, Normand; Ramassamy, Charles (MDPI, 2022-02-27)
    The overall impact of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) on our society is unprecedented. The identification of small natural ligands that could prevent the entry and/or replication of the coronavirus remains a pertinent ...
  • Insights on the effect of water content in carburizing gas mixtures on the metal dusting corrosion of iron 

    Bentria, El Tayeb; Salawu, Omotayo Akande; Ramesh, Abitha; Laycock, Nicholas; Hamer, Wouter; Mousseau, Normand; Becquart, Charlotte; Bouhali, Othmane; El-Mellouhi, Fedwa (Elsevier, 2021-12-07)
    Constituents of syngas, such as water, carbon monoxide and sulfides, can cause the degradation of the steel pipes they move through, leading to carbon dusting and corrosion. In spite of considerable attention to this process, many questions remain ...
  • Corilagin and 1,3,6-Tri-O-galloyl-β -D-glucose : potential inhibitors of SARS-CoV-2 variants 

    Binette, Vincent; Côté, Sébastien; Haddad, Mohamed; Nguyen, Phuong Trang; Bélanger, Sébastien; Bourgault, Steve; Ramassamy, Charles; Gaudreault, Roger; Mousseau, Normand (2021-06-28)
    The COVID-19 disease caused by the virus SARS-CoV-2, first detected in December 2019, is still emerging through virus mutations. Although almost under control in some countries due to effective vaccines that are mitigating the worldwide pandemic, the ...
  • Zirconia-titania-doped tantala optical coatings for low mechanical loss Bragg mirrors 

    Lalande, Émile; Lussier, Alexandre W.; Lévesque, Carl; Ward, Marianne; Baloukas, Bill; Martinu, Ludvik; Gabriele, Vajente; Billingsley, Garilynn; Ananyeva, Alena; Bassiri, Riccardo; Fejer, Martin M.; Schiettekatte, François (American Vacuum Society, 2021-06-10)
    The noise caused by internal mechanical dissipation in the high refractive index amorphous thin films in dielectric mirrors is an important limitation for gravitational wave detection. The objective of this study is to decrease this noise spectral ...
  • Polyphenol-peptide interactions in mitigation of Alzheimer’s disease : role of biosurface-induced aggregation 

    Gaudreault, Roger; Hervé, Vincent; Van De Ven, Theo; Mousseau, Normand; Ramassamy, Charles (IOS Press, 2021-05-08)
    Alzheimer’s disease (AD) is the most common age-related neurodegenerative disorder, responsible for nearly two-thirds of all dementia cases. In this review, we report the potential AD treatment strategies focusing on natural polyphenol molecules ...
  • Pressure effect on diffusion of carbon at the 85.91◦ 100 symmetric tilt grain boundary of α-iron 

    Rahman, Md Mijanur; El-Mellouhi, Fedwa; Bouhali, Othmane; Becquart, Charlotte; Mousseau, Normand (American Physical Society, 2021-04-19)
    The diffusion mechanism of carbon in iron plays a vital role in carburization processes, steel fabrication, and metal dusting corrosion. In this paper, using the kinetic activation-relaxation technique (k-ART), an off-lattice kinetic Monte Carlo algorithm ...
  • Diffusion mechanism of bound Schottky defect in magnesium oxide 

    Mahmoud, Sami; Carrez, Philippe; Landeiro Dos Reis, Marie; Mousseau, Normand; Cordier, Patrick (American Physical Society, 2021-03-25)
    In simple ionic crystals, intrinsic point defects must satisfy electrical neutrality and exist as Schottky defects. In magnesium oxide (MgO), a Schottky defect is then a combination of anionic and cationic vacancies. Since vacancies are charged, the ...
  • Engineering visible light emitting point defects in Zr-implanted polycrystalline AlN films 

    Aghdaei, Azin; Pandiyan, R.; Bouraoui, Ilahi; Chicoine, Martin; El Gowini, M.; Schiettekatte, François; Frechette, Luc G.; Morris, Denis (American Institute of Physics, 2020-12-22)
    We have investigated the impact of thermal annealing gaseous atmosphere of argon, nitrogen, and forming gas on the structural and optical properties of thin polycrystalline AlN films subjected to high-energy zirconium ions implantation. X-ray diffraction, ...
  • Mitigating Alzheimer’s disease with natural polyphenols: a review 

    Gaudreault, Roger; Mousseau, Normand (Bentham Science, 2019-03-14)
    According to Alzheimer’s Disease International (ADI), nearly 50 million people worldwide were living with dementia in 2017, and this number is expected to triple by 2050. Despite years of research in this field, the root cause and mechanisms responsible ...
  • Comparison of three radio-frequency discharge modes on the treatment of breast cancer cells in vitro 

    Boisvert, Jean-Sébastien; Lafontaine, Julie; Glory, Audrey; Wong, Philip; Coulombe, Sylvain (Institute of Electrical and Electronics Engineers, 2019)
    Non-thermal plasmas (NTPs) are known for their ability to induce thermal-free cytotoxic effects on cancer cells. However, as the variety of NTP devices increases, comparison of their cytotoxic effect becomes increasingly essential. In this work, we ...
  • Focussed helium ion channeling through Si nanomembranes 

    (2018-03-15)
    Channeling of low energy (25 to 35 keV) focussed He ions transmitted through crystalline Si (001) nanomembranes (50nm) has been observed using a He ion microscope. Planar (110) and (100) channeling was detected with critical incident angles of 1.0 at ...
  • A coupled 2 x 2D Babcock-Leighton solar dynamo model. II Reference dynamo solutions 

    St-Laurent-Lemerle, Alexandre; Charbonneau, Paul (American Astronomical Society, 2017-01)
    In this paper we complete the presentation of a new hybrid 2 × 2D flux transport dynamo (FTD) model of the solar cycle based on the Babcock–Leighton mechanism of poloidal magnetic field regeneration via the surface decay of bipolar magnetic regions ...
  • Hydrogen analysis depth calibration by CORTEO Monte-Carlo simulation 

    Moser, M.; Reichart, P.; Bergmaier, A.; Greubel, C.; Schiettekatte, François; Dollinger, G. (Elsevier, 2015-10-21)
    Hydrogen imaging with sub-μm lateral resolution and sub-ppm sensitivity has become possible with coincident proton–proton (pp) scattering analysis (Reichart et al., 2004). Depth information is evaluated from the energy sum signal with respect to energy ...
  • Spectrum simulation of rough and nanostructured targets from their 2D and 3D image by Monte Carlo methods 

    Schiettekatte, François; Chicoine, Martin (2015-09)
    Corteo is a program that implements Monte Carlo (MC) method to simulate ion beam analysis (IBA) spectra of several techniques by following the ions trajectory until a sufficiently large fraction of them reach the detector to generate a spectrum. Hence, ...
  • A Coupled 2 × 2D Babcock–Leighton Solar Dynamo Model. I. Surface Magnetic Flux Evolution 

    St-Laurent-Lemerle, Alexandre; Charbonneau, Paul; Carignan-Dugas, Arnaud (2015-09)
    The need for reliable predictions of the solar activity cycle motivates the development of dynamo models incorporating a representation of surface processes sufficiently detailed to allow assimilation of magnetographic data. In this series of papers ...
  • Critical process temperatures for resistive InGaAsP/InP heterostructures heavily implanted by Fe or Ga ions 

    Fekecs, André; Chicoine, Martin; Ilahi, Bouraoui; Spring Thorpe, Anthony J.; Schiettekatte, François; Morris, Denis; Charette, Paul G.; Arès, Richard (Elsevier, 2015-07-30)
    We report on critical ion implantation and rapid thermal annealing (RTA) process temperatures that produce resistive Fe- or Ga-implanted InGaAsP/InP heterostructures. Two InGaAsP/InP heterostructure compositions, with band gap wavelengths of 1.3 μm and ...
  • Computer Simulation of Ion Beam Analysis: Possibilities and Limitations 

    Mayer, Matej; Eckstein, W.; Langhuth, H.; Schiettekatte, François; von Toussaint, U. (2011)
    Quantitative application of ion beam analysis methods, such as Rutherford backscat- tering, elastic recoil detection analysis, and nuclear reaction analysis, requires the use of computer simulation codes. The different types of available codes are pre- ...
  • Etude des instabilités d'interface du procédé de coextrusion 

    Carrier, Pierre (Ecole des Mines de Paris, 1994-06-01)
    Une étude expérimentale et numérique du procédé de coextrusion est abordée dans ce mémoire. On trouve essentiellement les étapes de la conception d'une filière de coextrusion comportant un hublot permettant d'observer l'écoulement en continu. L'expérience ...