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Johann Michler

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Publications associées (43)

Impact of in situ nanomechanics on physical metallurgy

Johann Michler, Helena Van Swygenhoven, Efthymios Polatidis

The mechanical response of modern alloys results from a complex interplay between existing microstructure and its evolution with time under stress. To unravel these processes, in situ approaches intrinsically have a critical advantage to explore the basic ...

2019

CMOS and 3D Printing for NMR Spectroscopy at the Single Embryo Scale

Johann Michler, Giovanni Boero, Martinus Gijs, Franck Vincent, Jürgen Brugger, Nicola Harris, Enrica Montinaro, Laszlo Pethö, Beatrice Volpe, Marco Grisi, Maria Cristina Letizia

SWISS CHEMICAL SOC2019

3D printed microchannels for sub-nL NMR spectroscopy

Johann Michler, Giovanni Boero, Martinus Gijs, Jürgen Brugger, Enrica Montinaro, Laszlo Pethö, Marco Grisi, Maria Cristina Letizia

Nuclear magnetic resonance (NMR) experiments on subnanoliter (sub-nL) volumes are hindered by the limited sensitivity of the detector and the difficulties in positioning and holding such small samples in proximity of the detector. In this work, we report o ...

2018

Erosion mechanisms during abrasive waterjet machining: Model microstructures and single particle experiments

Stefano Mischler, Johann Michler

The erosion mechanisms during abrasive waterjet (AWJ) machining have been examined for a variety of materials. However, no systematic study has considered the effect of the microstructure property relationship on the erosion mechanisms in metals. In this w ...

Elsevier Science Sa2017

Micromechanics of Amorphous Metal/Polymer Hybrid Structures with 3D Cellular Architectures: Size Effects, Buckling Behavior, and Energy Absorption Capability

Stefano Mischler, Johann Michler, Cédric Frantz

By designing advantageous cellular geometries and combining the material size effects at the nanometer scale, lightweight hybrid microarchitectured materials with tailored structural properties are achieved. Prior studies reported the mechanical properties ...

Wiley-V C H Verlag Gmbh2017

Elevated temperature, micro-compression transient plasticity tests. on nanocrystalline Palladium-Gold: Probing activation parameters at the lower limit of crystallinity

Stefano Mischler, Johann Michler, Xavier Maeder

In this study, we probe the activation parameters and time-dependent plastic behavior of a nano crystalline Palladium-Gold alloy by means of elevated temperature micropillar compression experiments. All tests were conducted on a stable, displacement-contro ...

Pergamon-Elsevier Science Ltd2017

Orientation-dependent mechanical behaviour of electrodeposited copper with nanoscale twins

Stefano Mischler, Johann Michler

The mechanical properties of electrodeposited copper with highly-oriented nanoscale twins were investigated by micropillar compression. Uniform nanotwinned copper films with preferred twin orientations, either vertical or horizontal, were obtained by contr ...

Royal Soc Chemistry2016

Elevated temperature, strain rate jump microcompression of nanocrystalline nickel

Stefano Mischler, Johann Michler

Nanocrystalline and ultrafine-grained materials show enhanced strain rate sensitivity (SRS) in comparison to their coarse grained counterparts. Majority of SRS measurements on nanocrystalline thin films reported in literature have focused on nanoindentatio ...

Taylor & Francis Ltd2015

Comparison of In Situ Micromechanical Strain-Rate Sensitivity Measurement Techniques

Stefano Mischler, Johann Michler, Xavier Maeder

Strain-rate sensitivity (SRS) measurements using transient small-scale techniques are becoming increasingly popular for investigating nanostructured films and microcomponents since they can provide fundamental insights into the plastic deformation mechanis ...

Springer Verlag2015

Nanoindentation cracking in gallium arsenide: Part II. TEM investigation

Jean-Marc Breguet, Jean-Daniel Ganière, Johann Michler, Jacques Giovanola, Cédric Pouvreau

The nanoindentation fracture behavior of gallium arsenide (GaAs) is examined from two perspectives in two parent papers. In the first paper (part I), we address the morphology of the crack field induced by different types of indenters by means of in situ n ...

Cambridge University Press2013

Nanoindentation cracking in gallium arsenide: Part I. In situ SEM nanoindentation

Jean-Marc Breguet, Johann Michler, Jacques Giovanola, Cédric Pouvreau

The nanoindentation fracture behavior of gallium arsenide (GaAs) is examined from two perspectives in two parent papers. The first paper (part I) focuses on in situ nanoindentation within a scanning electron microscope (SEM) and on fractographic observatio ...

Cambridge University Press2013

Growth of doped silicon nanowires by pulsed laser deposition and their analysis by electron beam induced current imaging

Reymond Clavel, Johann Michler

Doped silicon nanowires (NWs) were epitaxially grown on silicon substrates by pulsed laser deposition following a vapour-liquid-solid process, in which dopants together with silicon atoms were introduced into the gas phase by laser ablation of lightly and ...

2011

Electron Microscopy Mechanical Testing of Silicon Nanowires Using Electrostatically Actuated Tensile Stages

Jean-Marc Breguet, Reymond Clavel, Johann Michler, Dongfeng Zhang

Two types of electrostatically actuated tensile stages for in situ electron microscopy mechanical testing of 1-D nanostructures were designed, microfabricated, and tested. Testing was carried out for mechanical characterization of silicon nanowires (SiNWs) ...

Institute of Electrical and Electronics Engineers2010

Electrophoretic deposition of functionalized polystyrene particles for TiO2 multi-scale structured surfaces

Stefano Mischler, Johann Michler

Titanium is an interesting material for biomedical implants thanks to its physical and chemical properties. In particular, TiO2 coatings with a surface characterized by micro-patterning combined with nano-topography are extremely attractive for orthopaedic ...

2010

Mechanisms of wafer sawing and impact on wafer properties

Christophe Ballif, Mathijs Pieter van der Meer, Johann Michler, Adrien Bidiville

Silicon wafer wire-sawing experiments were realized with different sets of sawing parameters, and the thickness, roughness, and cracks depth of the wafers were measured. The results are discussed in relation to assumptions underlying the rolling-indenting ...

Wiley-Blackwell2010

A high-sensitivity and quasi-linear capacitive sensor for nanomechanical testing applications

Jean-Marc Breguet, Reymond Clavel, Johann Michler, Dongfeng Zhang

The design, modeling, fabrication and characterization of triplate differential capacitive sensors employed in novel on-chip tensile and compression material testing systems are reported, where the capacitive sensors are integrated to measure the load on t ...

2009

Methods for functionalization of microsized polystyrene beads with titania nanoparticles for cathodic electrophoretic deposition

Stefano Mischler, Johann Michler

Functionalization of colloidal particles based on the use of polyelectrolytes and heterocoagulation was combined with electrophoretic deposition (EPD), with the aim of depositing titania-polystyrene (TiO2-PS) composite particles on Ti6A14V substrates. The ...

2008

Origin of intragranular crystallographic misorientations in hot-dip Al-Zn-Si coatings

Alain Jacot, Johann Michler, Christoph Niederberger

The origin of intragranular variations of the crystallographic orientation in hot-dip Al-Zn-Si coatings is discussed based on new experimental results and modelling. The solidification microstructure in as-received 55Al-43.4Zn-l.6Si (in wt.%) coatings depo ...

Elsevier2008

Strength and fracture of Si micropillars: A new scanning electron microscopy-based micro-compression test

Johann Michler, Benedikt Moser, Laura Barbieri

Cambridge, Cambridge University Press2007

Cross section investigations of compositions and sub-structures of tips obtained by focused electron beam induced deposition

Philippe Buffat, Danièle Laub, Johann Michler, Patrik Willi Hoffmann, Ivo Utke, Christian Santschi, Marco Cantoni

The spatial evolution of compositions and sub-structures inside focused-electron-beam-deposited tips from dicobalt-octacarbonyl Co2(CO)8 precursor at 25 keV and varying beam current (20 pA - 3 A) is extensively studied for the first time by means of energy ...

2005

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