Recherche

Afficher tous les résultats pour

Accueil

Personne

Sami Rtimi

Cette personne a quitté l’EPFL

À propos
Confidentialité
Mentions légales

Graph Chatbot

Publications associées (125)

Page 5 sur 7

Thin films for Healthcare Acquired Infections (HAIs) prevention : materials preparation, testing and characterization

Sami Rtimi

This thesis addresses the preparation of antibacterial surfaces for hospital facilities taking biomedical thin polymer films, textiles and catheter as probes. Magnetron sputtering is used to apply the coatings leading to fast bacterial inactivation in the ...

EPFL2016

Modeling and treatment optimization of pharmaceutically active compounds by the photo-Fenton process: The case of the antidepressant Venlafaxine

César Pulgarin, Sami Rtimi, Stefanos Giannakis, Idriss Hendaoui

In this study, the anti-depressant Venlafaxine, a new emerging contaminant of interest for the Swiss legislation, was subjected to systematic degradation. In order to develop an efficient framework for the treatment of emerging contaminants at industrial s ...

Elsevier Sci Ltd2017

Structural and optical properties of Mn2+-doped ZnCdS/ZnS core/shell quantum dots: New insights in Mn2+ localization for higher luminescence sensing

Sami Rtimi

The synthesis methods (one-or two-pot) of stable Mn2+ doped ZnxCd1-xS and ZnxCd1-xS/ZnS quantum dots are reported in this study with a quantum yield (QY) of -60% in anhydrous and -30% in aqueous media for Mn2+ photoluminescence (PL). Mn2+-localization in t ...

2022

Polystyrene CuO/Cu2O uniform films inducing MB-degradation under sunlight

César Pulgarin, Juan Kiwi, Sami Rtimi

This study reports on a Cu-sputtered film on polystyrene (PS) leading to the discoloration/degradation of methylene blue (MB) under low intensity solar simulated irradiation. Direct current magnetron sputtering (DCMS) was used to graft uniform, adhesive Cu ...

Elsevier2017

Accelerating the Design of Photocatalytic Surfaces for Antimicrobial Application: Machine Learning Based on a Sparse Dataset

Sami Rtimi

Nowadays, most experiments to synthesize and test photocatalytic antimicrobial materials are based on trial and error. More often than not, the mechanism of action of the antimicrobial activity is unknown for a large spectrum of microorganisms. Here, we pr ...

MDPI2021

Bactericide effects of transparent polyethylene photocatalytic films coated by oxides under visible light

Juan Kiwi, Sami Rtimi

This review addresses catalytic/photocatalytic films under visible light inducing fast bacterial inactivation. These films present uniform, stable and adhesive surfaces able to inactivate bacteria within minutes. Uniform sputtered polyethylene-TiO2 (PE-TiO ...

Elsevier2017

TiO2 and TiO2-Doped Films Able to Kill Bacteria by Contact: New Evidence for the Dynamics of Bacterial Inactivation in the Dark and under Light Irradiation

César Pulgarin, Juan Kiwi, Sami Rtimi, Rosendo Sanjines

This paper addresses recent developments in the design, evaluation, and characterization of flexible, uniform polyethylene-TiO2 (PE-TiO2), TiO2-In2O3, and TiO2-polyester able to inactivate bacteria under band gap irradiation and in the dark. The preparatio ...

Hindawi Publishing Corporation2014

A New Perspective in the Use of FeOx-TiO2 Photocatalytic Films: Indole Degradation in the Absence of Fe-Leaching

César Pulgarin, Juan Kiwi, Sami Rtimi

The study addresses the degradation of Indole under low intensity solar simulated light. The first evidence is presented for sputtered films degrading Indole at the solid-air interface. The co-sputtering of FeOx-TiO2 on polyethylene (PE) leads to an accele ...

Elsevier2016

Bacterial inactivation on sputtered TiOMoN and TiOMoN-Ag thin films under solar simulated light

Lioubov Kiwi, Sami Rtimi

The bacterial inactivation kinetics of Escherichia coli (E. coli) by innovative sputtered TiMoON and TiMoON-Ag films under simulated solar light irradiation is accounted for in a detailed, comprehensive and systematic form. This study presents the evidence ...

ELSEVIER SCIENCE SA2023

Effect of the spectral properties of TiO2, Cu, TiO2/Cu sputtered films on the bacterial inactivation under low intensity actinic light

César Pulgarin, Juan Kiwi, Sami Rtimi, Rosendo Sanjines

Bacterial inactivation by TiO2, Cu and TiO2/Cu DC-magnetron sputtered thin films was systematically investigated in the dark and under low intensity visible/actinic light. Low intensity actinic light led to a fast 6log10 (complete) bacterial inactivation w ...

Elsevier2012

Synergism between non-thermal plasma and photocatalysis: Implicationsin the post discharge of ozone at a pilot scale in a catalytic fixed-bed reactor

Sami Rtimi

This study focuses on Butyraldehyde (C4H8O) degradation using catalytic ozonation oriented to the optimization of non-thermal plasma/photocatalytic coupled processes. After the first oxidation by non-thermal plasma coupled photocatalytic processes, a secon ...

ELSEVIER SCIENCE BV2019

Mechanisms of the Antibacterial Effects of TiO2-FeOx under Solar or Visible Light: Schottky Barriers versus Surface Plasmon Resonance

Juan Kiwi, Sami Rtimi

This study reports the significant mechanistic difference between binary-oxide antibacterial films with the same composition but different microstructures. Binary TiO2-FeOx films were found to present a faster bacterial inactivation kinetics under visible ...

MDPI2018

CoSe2 grafted on 2D gC(3)N(4): A promising material for wastewater treatment, electrocatalysis and energy storage

Sami Rtimi

Despite several efforts in the past, the availability of stable and scalable multifunctional catalysts for water treatment and energy storage applications is very sparse. This research work addresses the above concern by grafting CoSe2 nanorods onto 2D gC( ...

2022

Design, testing and characterization of innovative TiN–TiO2 surfaces inactivating bacteria under low intensity visible light

César Pulgarin, Juan Kiwi, Sami Rtimi, Rosendo Sanjines

Ti was sputtered in a plasma chamber under a N2 atmosphere, depositing TiN films on polyester fibers. These films show a significant adsorption in the visible spectral region. A TiN layer 50 nm thick sputtered for 3 min under low intensity/actinic visible ...

Royal Soc Chemistry2012

New evidence for Cu-decorated binary-oxides mediating bacterial inactivation/mineralization in aerobic media

César Pulgarin, Juan Kiwi, Sami Rtimi, Michaël Bensimon

Binary oxide semiconductors TiO2-ZrO2 and Cu-decorated TiO2-ZrO2 (TiO2-ZrO2-Cu) uniform films were sputtered on polyester (PES). These films were irradiated under low intensity solar simulated light and led to bacterial inactivation in aerobic and anaerobi ...

Elsevier2016

Evidence for differentiated ionic and surface contact effects driving bacterial inactivation by way of genetically modified bacteria

Juan Kiwi, Sami Rtimi

New evidence is presented for the bacterial inactivation of E. coli presenting normal porins on sputtered Ag-Cu surfaces compared with similar E. coli porinless bacteria. Inactivation at a reduced rate was observed on the genetically modified porinless bac ...

Royal Society of Chemistry2017

TiON and TiON-Ag sputtered surfaces leading to bacterial inactivation under indoor actinic light

César Pulgarin, Juan Kiwi, Sami Rtimi, Michaël Bensimon, Rosendo Sanjines

This study reports the details Escherichia coli inactivation kinetics on TiON and TiON-Ag films sputtered on polyester by direct current reactive magnetron sputtering (DC) and pulsed magnetron sputtering (DCP) in an Ar/N2 /O2 atmosphere. The use of TiON le ...

2013

Correlating microscopy techniques and ToF-SIMS analysis of fully grown mammalian oocytes

Sami Rtimi

The 2D-molecular thin film analysis protocol for fully grown mice oocytes is described using an innovative approach. Time-of-flight secondary ion mass spectrometry (ToF-SIMS), scanning electron microscopy (SEM), atomic force microscopy (AFM) and optical mi ...

Royal Soc Chemistry2016

New evidence for hybrid acrylic/TiO2 films inducing bacterial inactivation under low intensity simulated sunlight

César Pulgarin, Juan Kiwi, Sami Rtimi

This study addresses the preparation and characterization of hybrid films prepared from Titanium dioxide (TiO2) Pickering stabilized acrylic polymeric dispersion as well as their bacterial inactivation efficiency under sunlight irradiation. Complete bacter ...

Elsevier2015

Deciphering the Mechanisms of Bacterial Inactivation on HiPIMS Sputtered CuxO-FeOx-PET Surfaces: From Light Absorption to Catalytic Bacterial Death

Sami Rtimi, Adrien Alexis Paul Chauvet

The production of nontoxic, affordable, and efficient antibacterial surfaces is key to the well-being of our societies. In this aim, antibacterial thin films have been prepared using earth-abundant metals deposited using high-power impulse magnetron sputte ...

2019