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Publications associées (24)

Nanoscale additive manufacturing of metals, alloys, and metal oxides

Nanoscale metallic systems exhibit distinct material properties from their bulk counterparts, which can be amplified by nanoarchitecting complex 3D shapes to exploit emergent structure–property relationships. Advances in nanoscale additive manufacturing techniques have enabled freeform 3D nanostructuring of a broad library of metallic systems, including pure metals, multicomponent alloys, and metal oxides. These methods can be broadly divided into optical printing, which uses two-photon lithography with met

2026

Optimization of Multi-Layered Thin Films for Minimizing Resistive Losses in Acoustic Resonators

Most NEMS devices use several metals, each serving its own function, such as electrical conductivity or stiffness. As those devices are mostly made of multiple layers, the electrical current must pass through several layers of metals that can be dissimilar. At the interfaces, a specific kind of resistance is found: contact resistance. The objective of this project is to measure and characterise the contact resistance between two metallic layers. Previous projects focused on DC structures whereas this one ai

École Polytechnique Fédérale de Lausanne2025

Data-Driven C-Refinement A proof-of-concept

This poster was presented at the IUTAM Symposium on Data-driven mechanics, taking place in Paris, France in Octoboer 2022. It shows a proof-of-concept for a new application of Data-Driven Computational Mechanics (DDCM): using it as a new type of adaptive refinement for linear elastic FEM simulations. DDCM is a new paradigm to solve mechanical problems without using a constitutive law. A mechanical problem can be formulated with a set of equations originating from physical principles, such as balance of

2022

Ampelos: escale viticole sur une île du Rhône

L’histoire commence avec une halle industrielle issue des ateliers Eiffel, démantelée, abandonnée au bord du Rhône, à Arles, et qui attendait une nouvelle vie. Ses fragments, chargés sur des bateaux, vont remonter le cours du fleuve qui louvoie dans les vallées viticoles qu’il a dessinées. Ils trouvent leur nouvel Éden sur l’île de la Conférence, au sud de Montélimar, pour composer la partie supérieure d’un lieu de formation aux métiers de la vigne. Assemblés en trois volumes, ils génèrent des espaces compl

2020

A System Dynamics Assessment of the Supply of Superalloys using WORLD6; Sufficiency for Civilian and Military Aviation Needs

The extraction, supply, market price and recycling of the metals used for superalloys were modelled using the systems dynamics model WORLD6. Peak production per capita (Supply Security) and stock-in-use per capita (Utility of Use) as well as resource stock lifetime during self-supply (Resilience) are key indicators. The resource estimates made resulted in significantly larger estimates than previous studies for nickel, tantalum, niobium, wolfram, molybdenum, cobalt, rhenium, titanium, zirconium and hafnium.

Paul Scherrer Institute, World Resources Forum2019

Etude de faisabilité d’un processus de biolixiviation pour le recyclage des métaux et terres rares contenus dans les téléphones portables.

The electronics industry is one of the most successful in the world (Veit & Bernardes, 2015). Computers, mobile phones, television screens, touch pads are now part of the daily lives of many people of this planet. The advent of more and more sophisticated products, innovations and continuous updates contribute to constant lifespan reduction of existing devices (Li, 2015). For a computer, for example, it went from 4.5 years in 1992 to 2 years for the year 2005 (Veit & Bernardes, 2015). Currently, sales of el

2019

Biorecovery of Precious Metal Nanoparticles From Waste Electrical and Electronic Equipments

The accelerating rate of accumulation of electronic waste or waste electrical and electronic equipment (WEEE) is a global problem due to the environmental and health consequences. Recycling of WEEE is a sustainable solution to overcome this problem. Use of WEEE as a secondary ore to extract precious metals and metal nanoparticles is widely practiced in recycling systems. The wider array of applications of precious metals and metal nanoparticles and greener production means has increased the demand from indu

Elsevier2019

Modelling the global copper, zinc and lead mining rates and co-extraction of technology metals, market supply, price and remaining extractable amounts

The total resources form copper, zinc and lead was estimated from a reworking of the literature. The data was used as input to the integrated systems dynamics model BRONZE, and used to estimate the global supply of these metals and the by-products antimony, indium, germanium, tellurium, cadmium, bismuth and selenium. The runs show that copper, zinc and lead go through peak production around 2050 and declines as the resources run out some time after 2100, and with them the metals produced as by products beco

A World Resources Forum Production, PSI2017

Femtosecond laser assisted 3-dimensional freeform fabrication of metal microstructures in fused silica

Andreas Mortensen, Yves Bellouard

Femtosecond laser exposure of fused silica combined with chemical etching has opened up new opportunities for three-dimensional freeform processing of micro-structures that can form complex micro-devices of silica, integrating optical, mechanical and/or fluidic functionalities. Here, we demontrate an expansion of this process with an additional fabrication step that enables the integration of three-dimensional embedded metallic structures out of useful engineering metals such as silver, gold, copper as well

Spie-Int Soc Optical Engineering2017

Recovery of metals from metals, an example for the resource cycle

Bottom ash from municipal solid waste incineration (MSWI) consists of elemental metals in considerable amounts. The fine fraction < 4 mm additionally contains chemically bound metals (oxides, carbonates, silicates). Separation prospects with techniques as in ore processing (flotation, density separation, bioleaching, hydrothermal solution) are discussed. During alteration after wet extraction mineral material with hydraulic properties form coatings on almost all particles of the bottom ash and complicate se

Villigen PSI, World Resources Forum, printed by Paul Scherrer Institute2015

Effect of a nm-sized interlayer on the Thermal Boundary Conductance between metals and diamond

Study the influence of adjunction of a dielectric or metallic interlayer on the Thermal Boundary Conductance (TBC) measurable between a metallic layer and a diamond substrate. An interlayer does not need to be thick to have a substantial influence influence on the measured TBC. Surface termination with oxygen yields the same TBC contribution as when an Al2O3 layer of finite thickness is used. A metallic interlayer using nickel as thin as 1.5 nm yields the TBC values close to that of the Ni/C system

2013

Accumulation of pollutants and plant wellness : Bottleneck or key to successful phytoremediation ?

Jean-Paul Schwitzguebel

Because plants are static and live in a competitive and sometimes hostile environment, they have evolved mechanisms that protect them from abiotic and biotic stress. These mechanisms include detoxification and sequestration of xenobiotic compounds and of heavy metals, exploited in any phytoremediation process. However there must be a limit on the amount of pollutants that can be accumulated and detoxified without disrupting the normal plant metabolism and wellness. Enzymes involved in xenobiotics detoxifica

2011

Plant accumulation of pollutants versus plant wellness: insoluble conundrum or key to a successful green clean-up?

Jean-Paul Schwitzguebel

2010

Self-assembled ordered mesoporous metals

Control over the structure of metals at the mesoscale (2-50 nm) is crucial for emerging applications such as energy conversion, sensing, and information processing. The self-assembly of nanoparticles with block copolymers provides a natural entry point to ...

2009

Negative plasmon dispersion in the transition-metal dichalcogenide 2H-TaSe2

Helmuth Berger

We report about an electron energy-loss study on the dispersion of the charge-carrier plasmon in the charge-density-wave system 2H-TaSe2 above and below the metal-insulator transition. In both cases we find a negative slope, which is in remarkable contrast ...

2009

Estimation des rejets urbains de zinc et de cadmium au moyen d'une analyse de flux de substance. Application à la commune de Lausanne

This work is focused on the problem of the contamination of surface water and sediments by heavy metals, more particularly by cadmium and zinc, contained in runoff water and wastewater. To bring to light the urban cycle of cadmium and zinc, we have used the methodology of the substance flow analyses (SFA) and have elaborated a model. This model consists of various sources, flows, processes and stocks. The zone of study of this work is the municipality of Lausanne, situated at the edge of the Lake Geneva in

2009

Carbon diffusion in CVD growth of carbon nanotubes on metal nanoparticles

Alfredo Pasquarello

Diffusion of carbon is the crucial step in chemical vapor deposition (CVD) growth of carbon nanotubes (CNTs) On metal nanoparticles. Using first principles techniques we model the binding and diffusion of carbon atoms and dimers on late transition (Ni, Pd, Pt) and coinage (Cu, Ag, Au) metal catalysts. We consider various diffusion mechanisms including both surface and subsurface channels, finding the lowest activation barriers for carbon adatoms on nanoparticles of coinage metals. For these metals, our calc

Wiley2008

Microscopic theory of the Casimir force at thermal equilibrium: Large-separation asymptotics

We present an entirely microscopic calculation of the Casimir force f(d) between two metallic plates in the limit of large separation d. The models of metals consist of mobile quantum charges in thermal equilibrium with the photon field at positive tempera ...

2008

Multiscale modeling of crowdion and vacancy defects in body-centered-cubic transition metals

We investigate the structure and mobility of single self-interstitial atom and vacancy defects in body-centered-cubic transition metals forming groups 5B (vanadium, niobium, and tantalum) and 6B (chromium, molybdenum, and tungsten) of the Periodic Table. D ...

2007

Thermodynamics of Electrolytic Corrosion

Dieter Landolt

The sections in this article are

Introduction
Fundamentals of Thermodynamics
Thermodynamics of Electrochemical Reactions
    Example 1
    Example 2
    Example 3
Nernst Equation
    Example 3
Cathodic Reactions in Corrosion
Pourbaix Diagrams
    Pourbaix Diagram for Water
    Pourbaix Diagram for Metals
    Example: Pourbaix Diagram for Fe
    Comments on Pourbaix Diagrams
Thermodynamics of High Temperature Corrosion

Wiley2007

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Publications associées (24)

A System Dynamics Assessment of the Supply of Superalloys using WORLD6; Sufficiency for Civilian and Military Aviation Needs

Paul Scherrer Institute, World Resources Forum2019

Etude de faisabilité d’un processus de biolixiviation pour le recyclage des métaux et terres rares contenus dans les téléphones portables.

2019

Biorecovery of Precious Metal Nanoparticles From Waste Electrical and Electronic Equipments

Elsevier2019

Modelling the global copper, zinc and lead mining rates and co-extraction of technology metals, market supply, price and remaining extractable amounts

A World Resources Forum Production, PSI2017

Estimation des rejets urbains de zinc et de cadmium au moyen d'une analyse de flux de substance. Application à la commune de Lausanne

2009

Introduction
Fundamentals of Thermodynamics
Thermodynamics of Electrochemical Reactions
    Example 1
    Example 2
    Example 3
Nernst Equation
    Example 3
Cathodic Reactions in Corrosion
Pourbaix Diagrams
    Pourbaix Diagram for Water
    Pourbaix Diagram for Metals
    Example: Pourbaix Diagram for Fe
    Comments on Pourbaix Diagrams
Thermodynamics of High Temperature Corrosion

Wiley2007