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Hubert Girault

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Publications associées (430)

A Self-Assembled Organic/Metal Junction for Water Photo-Oxidation

Hubert Girault, Astrid Johana Olaya Avendano, Natalia Gasilova, Jonnathan Cesar Hidalgo Acosta, Victor Costa Bassetto, Terumasa Omatsu, Julieta Soledad Riva

We report the in situ self-assembly of TTF, TTF•+, and BF4 − or PF6 − into p-type semiconductors on the surface of Pt microparticles dispersed in water/acetonitrile mixtures. The visible light photoactivation of these selfassemblies leads to water oxidatio ...

2019

Disposable Biosensor Based on Amidase/CeO2/GNR Modified Inkjet‐printed CNT Electrodes‐droplet Based Paracetamol Detection in Biological Fluids for “Point‐of‐care” Applications

Hubert Girault, Andreas Stephan Lesch, Milica Jovic

2019

Sodium chromium hexacyanoferrate as a potential cathode material for aqueous sodium-ion batteries

Hubert Girault, Pierre Mettraux, Emad Oveisi, Dominika Baster, Surbhi Agrawal

Sodium chromium hexacyanoferrate (NaCrHCF) is obtained here using a facile co-precipitation method at room temperature. The powder was investigated in terms of potential use as a cathode material for aqueous sodium-ion batteries under neutral conditions. T ...

Royal Society of Chemistry2019

Inkjet-Printed Mesoporous TiO2 and Perovskite Layers for High Efficiency Perovskite Solar Cells

Hubert Girault, Mohammad Khaja Nazeeruddin, Paul Joseph Dyson, Emad Oveisi, Andreas Stephan Lesch, Yonghui Lee, Victor Costa Bassetto, Sanghyun Paek, Aron Joel Huckaba, Rui Xia

Perovskite solar cells with mesoporous TiO2 electron transport layers have previously reached >22 % efficiency at the laboratory scale (

2019

Local Energy Storage and Stochastic Modeling for Ultrafast Charging Stations

Hubert Girault, Heron Vrubel, Yorick Ligen

Multi-stall fast charging stations are often thought to require megawatt-range grid connections. The power consumption profile of such stations results in high cost penalties due to monthly power peaks and expensive linkage fees. A local energy storage sys ...

2019

Point-of-care amperometric determination of L-dopa using an inkjet-printed carbon nanotube electrode modified with dandelion-like MnO2 microspheres

Hubert Girault, Andreas Stephan Lesch, Milica Jovic

An electrochemical sensor is described for the determination of L-dopa (levodopa; 3,4-dihydroxyphenylalanine). An inkjet-printed carbon nanotube (IJPCNT) electrode was modified with manganese dioxide microspheres by drop-casting. They coating was character ...

2019

MALDI Detection of Exosomes: A Potential Tool for Cancer Studies

Hubert Girault, Horst Pick, Natalia Gasilova, Tzu-En Lin, Yingdi Zhu

Matrix-assisted laser desorption ionization time-of-flight mass spectrometry is used to detect intact whole exosomes, yielding exosomal fingerprints within minutes. This rapid exosome detection approach is proposed as a potential tool for cancer studies. M ...

2019

Tape-Stripping Electrochemical Detection of Melanoma

Hubert Girault, Horst Pick, Andreas Stephan Lesch, Tzu-En Lin, Yingdi Zhu, Sorour Darvishi

A noninvasive electrochemical melanoma detection approach based on using adhesive tapes for collecting and fixing cells from a suspicious skin area and transferring the cells into a scanning electrochemical microscope (SECM) is presented. The adhesive laye ...

AMER CHEMICAL SOC2019

Inkjet Printed Carbon Nanotube Electrodes for Measuring Pyocyaninand Uric Acid in a Wound Fluid Simulant and Culture Media

Hubert Girault, Andreas Stephan Lesch, Milica Jovic

Polyacrylamide-coated, carbon nanotube (PA/CNT)electrodes were prepared by an ink-jet printing process and used to measure pyocyanin and uric acid in a wound fluid simulant at 37 oC.These two moleculesare potential indicators of infection and therefore the ...

2019

Print-Light-Synthesis of Ni and NiFe-nanoscale catalysts for oxygen evolution

Hubert Girault, Mounir Driss Mensi, Emad Oveisi, Andreas Stephan Lesch, Victor Costa Bassetto

By hyphenating inkjet printing and flash light irradiation, Ni- and NiFe-nano-electrocatalysts of diameters below 2.5 nm with ultralow loadings below 2 µg·cm–2 are synthesized. To achieve this, nanoliter ink volumes containing Ni and Fe chlorides as cataly ...

2019

Detection of bacteria

Hubert Girault, Horst Pick, Andreas Stephan Lesch, Yingdi Zhu, Milica Jovic

A method for bacteria detection and the assessment of the antimicrobial susceptibility profile uses a bacterial viability assay based on combining a highly efficient affinity bacteria enrichment/ separation with an electrochemical redox interrogation measu ...

2019

Large-scale fabrication of flexible solid-state reference electrodes

Hubert Girault, Milica Jovic, Kumar Varoon Agrawal, Luis Francisco Villalobos Vazquez de la Parra

A new approach for large-scale fabrication of miniaturized, reliable and planar solid-state reference electrodes on flexible substrates is presented. Inkjet printing technique was used for the fabrication of conductive path and silver patterns that were ch ...

2019

Electrochemical potential window of battery electrolytes: the HOMO-LUMO misconception

Hubert Girault, Pekka Eero Peljo

A widespread misconception in the lithium ion battery literature is the equality of the energy difference of HOMO and LUMO of the solvent with the electrochemical stability window. HOMO and LUMO are concepts derived from approximated electronic structure t ...

2018

Rapid inkjet printing of high catalytic activity Co3O4 /N-rGO layers for oxygen reduction reaction

Hubert Girault, Véronique Amstutz, Emad Oveisi, Andreas Stephan Lesch, Victor Costa Bassetto

The accurate and reproducible large-scale production of catalyst layers containing low-cost, abundant electrocatalysts gains in importance. Herein, pivotal factors are discussed that need to be considered when a combined inkjet printing and photonic curing ...

2018

Effect of Chaotropes on the Transfer of Ions and Dyes across the Liquid–Liquid Interface

Hubert Girault, Grégoire Clément Gschwend, Pekka Eero Peljo, Evgeny Smirnov, Lucie Josette Renée Rivier, Elena Vladimirova

Chaotropes such as urea can break the structure of water, weakening the hydrophobic effect and reducing aggregation. Here, we investigated how the addition of urea affects the transfer of ions and cationic dyes across the interface between immiscible elect ...

2018

Efficiency improvement of an all-vanadium redox flow battery by harvesting low-grade heat

Hubert Girault, Danick Reynard, Christopher Raymond Dennison, Alberto Battistel

Redox flow batteries (RFBs) are rugged systems, which can withstand several thousand cycles and last many years. However, they suffer from low energy density, low power density, and low efficiency. Integrating a Thermally Regenerative Electrochemical Cycle ...

2018

Semi-analytical modelling of linear scan voltammetric responses for soluble-insoluble system: The case of metal deposition

Hubert Girault, Sunny Isaïe Maye, Pekka Eero Peljo, Imene Atek

The absence of general theoretical models describing linear sweep voltammetry (LSV) or cyclic voltammetry (CV) responses for soluble-insoluble systems such as one-step electrodeposition reactions under quasi-reversible condition makes it difficult to extra ...

2018

Electrochemical Imaging of Cells and Tissues

Hubert Girault, Andreas Stephan Lesch, Tzu-En Lin

The technological and experimental progress in electrochemical imaging of biological specimens is discussed with a view on potential applications for skin cancer diagnostics, reproductive medicine and microbial testing. The electrochemical analysis of sing ...

2018

Photosensitized Hydrogen Evolution on a Floating Electrocatalyst Coupled to Electrochemical Recycling

Hubert Girault, Astrid Johana Olaya Avendano, Jonnathan Cesar Hidalgo Acosta, Terumasa Omatsu

Photoexcited protonated tetrathiafulvalene (HTTF+) was found to act as a photosensitizer, injecting electrons into Pt microparticles (floating electrocatalysts) to produce H2 and TTF•+ in acidic acetonitrile. In addition, TTF•+ was electrochemically reduce ...

2018

Gold Raspberry-Like Colloidosomes Prepared at the Water-Nitromethane Interface

Hubert Girault, Pekka Eero Peljo, Evgeny Smirnov

Here, we propose a simple shake-flask method to produce micron-size colloidosomes from a liquid-liquid interface functionalized with a gold nanoparticle film. A step-by-step extraction process of an organic phase partially miscible with water led to the fo ...

2018

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