Publications associées à Tétrachlorure de silicium

Liquid metal infiltration of silicon based alloys into porous carbonaceous materials. Part II: Experimental verification of modelling approaches by infiltration of Si-Zr alloy into idealized microchannels

Ludger Weber, Caroline Hain, Giovanni Bianchi, Alberto Ortona, Manoj Kondibhau Naikade

In this work, the mechanisms leading to the pore closure in reactive melt infiltration (RMI) of carbon by pure silicon and a near eutectic Si-8 at-pct Zr alloy at 1500 and 1700 degrees C under vacuum were studied. Various geometrical configurations of micr ...

ELSEVIER SCI LTD2022

Grafting of Alkali Metals on Fumed Silica for the Catalytic Dehydrogenation of Methanol to Formaldehyde

Oliver Kröcher, Alimohammad Bahmanpour, Christophe Jean Baranowski, Jack Brandon

Water free, non-oxidative catalytic dehydrogenation of methanol to formaldehyde is an important process for the formation of anhydrous, molecular formaldehyde (FA). Sodium or sodium-containing salts were shown to catalyze the reaction, but their reaction m ...

Wiley-VCH Verlag2021

The effect of alkali hydroxides and equilibration time on Al uptake by calcium silicate hydrates (C-S-H)

Sonya Barzgar

Cement production accounts for approximately 8% of man-made CO2 emissions. Lowering these CO2 emissions is currently one of the most important and urgent research topics within the cement community. To reduce these emissions, the Portland cement (PC) is pa ...

EPFL2021

A Novel Reconfigurable CMOS Compatible Ka Band Bandstop Structure Using Split-Ring Resonators and Vanadium Dioxide (VO2) Phase Change Switches

Mihai Adrian Ionescu, Andreas Schueler, Anna Krammer, Junrui Zhang, Emanuele Andrea Casu, Riyaz Mohammed Abdul Khadar, Andrei Müller

The article presents the design, fabrication and characterization of a novel complementary metal-oxidesemiconductor (CMOS) compatible reconfigurable Ka band bandstop structure using split ring resonators (SRR) while employing the Vanadium Dioxide (VO2) pha ...

IEEE2019

Probing Alloy Formation Using Different Excitonic Species: The Particular Case of InGaN

Nicolas Grandjean, Raphaël Butté, Gordon Jens Callsen

Since the early 1960s, alloys are commonly grouped into two classes that feature either bound states in the band gap (I) or additional, nondiscrete band states (II). Consequently, one can observe either excitons bound to isoelectronic impurities or the typ ...

American Physical Society2019

Photonic Damascene process for integrated high Q microresonator based nonlinear photonic devices

Martin Hubert Peter Pfeiffer

Chip-based optical waveguides formed by a silicon nitride (Si3N4) core and a silicon dioxide (SiO2) cladding are an important platform for low loss waveguides and nonlinear optics. High Q microresonators based on this material system have become a standard ...

EPFL2018

Incorporation of rubidium cations into perovskite solar cells improves photovoltaic performance

Michael Graetzel, Shaik Mohammed Zakeeruddin, Wolfgang Richard Tress, Ulf Anders Hagfeldt, Michael Saliba, Antonio Abate, Juan-Pablo Correa-Baena, Konrad Domanski, Jiyoun Seo, Amita Ummadisingu, Taisuke Matsui

All of the cations currently used in perovskite solar cells abide by the tolerance factor for incorporation into the lattice. We show that the small and oxidation-stable rubidium cation (Rb+) can be embedded into a "cation cascade" to create perovskite mat ...

American Association for the Advancement of Science2016

Insight in the 3D morphology of silica-based nanotubes using electron microscopy

Teresa Katharina Dennenwaldt

Amorphous silica-based nanotubes (SBNTs) were synthesized from phosphoryl triamide, OP(NH2)(3), thiophosphoryl triamide, SP(NH2)(3), and silicon tetrachloride, SiCl4, at different temperatures and with varying amount of the starting material SiCl4 using a ...

Pergamon-Elsevier Science Ltd2016

On thermal and radiation damage to silicon crystals in the LHC proton beam

Philippe Jean Schoofs

We investigate thermal and radiation effects in silicon crystals which can be used for extracting beam halo particles in high energy accelerators. Application of bent crystals for removing halo is considered as a promising technique to enhance the beam col ...

Elsevier2013

3D-Integration of a Carbon Nanotube based RF-NEMS

Rokhaya Gueye

In the framework of the NanoTera project CabTuRes, a system-in-package for a nano-resonator was proposed, integrating CMOS driving electronics and vacuum encapsulation. This doctoral research aimed to investigate 3D-integration technologies for a Single-Wa ...

EPFL2013

Nanoparticle Synthesis and Growth in a Continuous Plasma Reactor from Organosilicon Precursors

Elizabeth Buitrago Godinez

Silica-like nanoparticles are produced from four different organosilicon monomers HMDSO, TMDSO, TEOS and TMOS in a continuous non-equilibrium plasma reactor. The nanoparticle synthesis is studied as a function of the process pressure, plasma power, gas vel ...

Wiley-Blackwell2012

High numerical aperture silicon collimating lens for mid-infrared quantum cascade lasers manufactured using wafer-level techniques

Hans Peter Herzig, Lubos Hvozdara, Pierre-Yves Baroni, Joab Di Francesco, Antoine Muller

We present an aspheric collimating lens for mid-infrared (4-14 µ) quantum cascade lasers. The lenses were etched into silicon by an inductively coupled plasma reactive ion etching system on wafer level. The high refractive index of silicon reduces the heig ...

2012

From oxide surface to organic transistor properties: the nature and the role of oxide gate surface defects

Libero Zuppiroli, Stéphane Suarez, Franziska Dora Fleischli

By applying various surface treatments to the oxide gate of pentacene transistors, both in vacuum (H2, O2 and Ar plasma treatments) and in aqueous solution, we were able to vary the balance between oxygen-free radicals (Si•), oxygen-centered radicals (Si−O ...

American Chemical Society2010

Oxygen assisted focused electron beam induced deposition of silicon dioxide

Alexandre Perentes

Focused Electron Beam Induced Deposition (FEBID) is a rapid prototyping technique for the investigation, production and modification of 2 and 3-D nanostructures. The process takes place at room temperature, in the high-vacuum chamber of a Scanning Electron ...

EPFL2007

Ultra-thin hybrid organic/inorganic gas barrier coatings on polymers

Yves Leterrier, Bandeep Singh, Gil Rochat

The oxygen transmission rate of 48 nm thick SiO2 coatings on a poly(ethylene terephthalate) (PET) substrate was reduced by a factor of three after applying an 8 nm thick layer of oligomerized gammaaminopropyltriethoxysilane (γ-APS). Increasing the thicknes ...

2007

Fabrication and functionalization of nanochannels by electron-beam-induced silicon oxide deposition

Jürgen Brugger, Horst Vogel, Christian Santschi, Christophe Danelon

We report on the fabrication and electrical characterization of functionalized solid-state nanopores in low stress silicon nitride membranes. First, a pore of approximately 50 nm diameter was drilled using a focused ion beam technique, followed by the loca ...

2006