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A Needle-Shaped Electrochemical Sensor in Platinum for Robust Monitoring of Anaesthetics

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Publications associées (44)

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Integration Methods of Cyclodextrins on Gold and Carbon Electrodes for Electrochemical Sensors

Sandro Carrara, Irene Taurino

Cyclodextrins (CDs) are oligosaccharides composed of six (α), seven (β) or eight (γ) glucose units. Their inner hydrophobic cavity and hydrophilic external surface enable the formation of the “host-guest inclusion complex” with different organic or inorgan ...

2019

Electrochemical Behavior of Carbon Electrodes for In Situ Redox Studies in a Transmission Electron Microscope

Vasiliki Tileli, Robin Pierre Alain Girod, Nikolaos Nianias

Electrochemical liquid cell transmission electron microscopy (TEM) is a unique technique for probing nanocatalyst behavior during operation for a range of different electrocatalytic processes, including hydrogen evolution reaction (HER), oxygen evolution r ...

CAMBRIDGE UNIV PRESS2019

LiNiO Gate Dielectric with Tri-Gate Structure for High Performance E-mode GaN transistors

Elison de Nazareth Matioli, Luca Nela, Mohammad Samizadeh Nikooytabalvandani, Taifang Wang

In this work, a Tri-Gate AlGaN/GaN metal-oxide-semiconductor high electron mobility transistor (MOSHEMT) with lithium nickel oxide (LiNiO) gate dielectric is demonstrated for enhancement-mode (e-mode) operation. The high-quality of pulse-laser-deposited (P ...

IEEE2021

Local Study on Hydrogen and Hydrogen Gas Bubble Formation on a Platinum Electrode

Hubert Girault, Andreas Stephan Lesch, Christopher Raymond Dennison, Alberto Battistel

This work investigates the effect of current density on the hydrogen gas bubble formation during electrolysis on a platinum electrode. Local detection of bubble evolution was performed electrochemically by using a hydrogen-collecting microelectrode placed ...

AMER CHEMICAL SOC2019

Beware of your electrodes! How electrode materials and application processes impact the lifetime of slide-ring-material-based DEAs

Herbert Shea

For dielectric elastomer actuators (DEAs) to find more widespread adoption in commercial products, a better understanding of their durability is needed. By determining the different mechanisms contributing to ageing and breakdown in DEAs, new methods for i ...

SPIE-INT SOC OPTICAL ENGINEERING2021

Effect of electrode composition and patterning method on the lifetime of silicone-based dielectric elastomer actuators (DEA) under different environmental conditions

Herbert Shea, Fabio Beco Albuquerque

We report an experimental investigation of the lifetime of dielectric elastomer actuators (DEAs) under constant DC actuation, with a characterization setup which allows the monitoring of strain and resistance over time for 6 DEAs in parallel. We show how t ...

SPIE-INT SOC OPTICAL ENGINEERING2021

Quasi-Digital Biosensor-Interface for a Portable Pen to Monitor Anaesthetics Delivery

Sandro Carrara, Danilo Demarchi, Francesca Stradolini, Simone Aiassa, Abuduwaili Tuoheti

Monitoring of patient response to the anaesthetic drugs is an attractive improvement for achieving a correct balance of sedation level, increasing the chance of success in the right procedure of anaesthesia. Nowadays, there are no commercial tools able to ...

IEEE2019

A comparative surface analysis of explanted hip joint prostheses made of different biomedical alloys

Stefano Mischler, Angela Bermudez Castañeda

The introduction of modular design in total hip arthroplasty has enabled the use of different materials in one single configuration and the adjustment of the prosthesis to the patient's body, and facilitated medical revisions. However, modularity leads to ...

IMPRENTA UNIV ANTIOQUIA2021

Oxide versus Nonoxide Cathode Materials for Aqueous Zn Batteries: An Insight into the Charge Storage Mechanism and Consequences Thereof

Alfredo Pasquarello, Assil Bouzid

Aqueous Zn-ion batteries, which are being proposed as large-scale energy storage solutions because of their unparalleled safety and cost advantage, are composed of a positive host (cathode) material, a metallic zinc anode, and a mildly acidic aqueous elect ...

2019

Ultra-High-Voltage (7-kV) Bidirectional Flyback Converter Used to Drive Capacitive Actuators

Yves Perriard, Alexis Boegli, Morgan Almanza, Raphaël Johannes Charles Mottet

Dielectric elastomer actuators (DEAs) have extremely advantageous characteristics such as lightness, compactness, flexibility, and large displacements. However, in order to operate, they can require voltages in the order of several thousands of volts. Thus ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2021

Experimental and theoretical studies on electropolymerization of polar amino acids on platinum electrode

Christophe Roussel

The anodic oxidation of polar amino acids (L-serine, L-threonine, L-asparagine, and L-glutamine) in aqueous electrolyte on smooth platinum electrode was carried out by cyclic voltammetry coupled to electrochemical quartz crystal microbalance (EQCM). pH (zw ...

Elsevier2017

Bayesian optimization of peripheral intraneural stimulation protocols to evoke distal limb movements

Silvestro Micera, Grégoire Courtine, Sophie Marie Marthe Wurth, Simon Borgognon, Marion Aimée Geneviève Badi-Dubois

Objective. Motor neuroprostheses require the identification of stimulation protocols that effectively produce desired movements. Manual search for these protocols can be very time-consuming and often leads to suboptimal solutions, as several stimulation pa ...

IOP Publishing Ltd2021

Inkjet-printed microtiter plates for portable electrochemical immunoassays

Hubert Girault, Fernando Cortes Salazar, Andreas Stephan Lesch, Alexandra Bondarenko, Frédéric Gumy, Milica Jovic, Yingdi Zhu

Herein, we present the large-scale fabrication of multiplexed three-electrode sensors used in a point-of-care device platform that couples a magnetic bead-based immunoassay strategy with amperometric detection for rapid and highly sensitive analysis. The m ...

Elsevier Science Sa2017

Development of Lamb wave resonators in thin film X-cut lithium niobate

Muhammad Faizan

Microelectromechanical systems (MEMS) is among the most revolutionary technologies of 21st century, with the applications ranging from industrial systems to consumer electronics. Using MEMS in battery-powered wireless devices has long been seen as the evol ...

EPFL2021

Synergistic Coupling Between Electrochemical and Ultrasound Treatments for Organic Pollutant Degradation as a Function of the Electrode Material (IrO2 and BDD) and the Ultrasonic frequency (20 and 800 kHz)

César Pulgarin

Solutions of the organic pollutant model, Crystal Violet (CV), were subjected to ultrasonic, electrochemical treatment and its combination. Ultrasound was tested at two frequencies (20 kHz or 800 kHz) and 80 W in deionized water. After 120 min, 20 kHz cond ...

Esg2016

Anchor Losses Dependence on Electrode Material in Contour Mode Resonators

Luis Guillermo Villanueva Torrijo, Andrea Lozzi

We here present a study on the influence of metal electrodes on the anchor losses in Contour Mode Resonators (CMRs). Our Finite Element Modelling (FEM) simulation results show that electrode material is key to determine the acoustic losses, and therefore t ...

Ieee2016

Monolithically Integrated Catalyst-Free High Aspect Ratio InAs-on-Insulator (InAsOI) FinFETs for pH Sensing

Mihai Adrian Ionescu, Francesco Bellando, Fabien Patrick Wildhaber, Junrui Zhang, Maneesha Rupakula, Clarissa Convertino

In this work, we report a novel Indium Arsenide-on-insulator (InAsOI) FinFET platform designed with record high aspect ratio that favors the use of the devices as charge sensors. InAs has very high mobility among III-V semiconductors and an intrinsic surfa ...

2020

Microfluidic-integrated vertical electrodes employed in impedance-based cytometry : potential application in immunotherapies

Enrica Rollo

During the last decades, the growing interest for single-cell analysis has led to the creation of a number of microfluidic and lab-on-a chip (LOC) platforms for characterizing cellular samples. In that context label-free based platforms are minimally invas ...

EPFL2016

Pencil Graphite Needle-Shaped Biosensor for Anaesthetic Monitoring in Human Serum

Sandro Carrara, Danilo Demarchi, Simone Aiassa

Direct and online continuous monitoring of anaesthetic intake by the patient's blood stream improves practices in the critical procedure of anaesthesia. Several systems have been proposed to address this challenge. Electrochemical techniques are highly app ...

IEEE2020

Velocity Control of 180 degrees Domain Walls in Ferroelectric Thin Films by Electrode Modification

Nava Setter, Alexander Tagantsev, Tomas Sluka, Petr Yudin, Ludwig Feigl

The velocity of individual 1800 domain walls in thin ferroelectric films of PbZr0.1Ti0.9O3 is strongly dependent on the thickness of the top Pt electrode made by electron-beam induced deposition (EBID). We show that when the thickness is varied in the rang ...

Amer Chemical Soc2016