Search results for: Jean-Marc Janot

Items from 1 to 20 out of 30 results

article

When anthraquinone dyes meet pillared montmorillonite: Stability or fading upon exposure to light?

Pollyana Trigueiro, Francisco A.R. Pereira, David Guillermin, Baptiste Rigaud, more

Dyes and Pigments > 2018 > 159 > C > 384-394

Hybrid pigments have attracted great interest due to their stability and physicochemical properties that can be used in paintings, artworks and in the field of cultural heritage. The study of new materials includes the search for new pigments by immobilization of the dyes in resistant substrates such clays minerals to get new colour fonts and materials with high stability. Organic-inorganic based...

article

Large osmotic energy harvesting from functionalized conical nanopore suitable for membrane applications

Sébastien Balme, Tianji Ma, Emmanuel Balanzat, Jean-Marc Janot

Journal of Membrane Science > 2017 > 544 > C > 18-24

The direct capture of energy from salinity gradient is limited by low energetic efficiency. Here we propose to investigate an original membrane for capture of osmotic energy based conical track-etched nanopore. In order to improve the surface charge at pH 7, the nanopore was functionalized with chitosan / poly(acrylic acid) self-assembly. We observed for single nanopore a large osmotic current around...

article

A Review of Gold and Silver Nanoparticle‐Based Colorimetric Sensing Assays

Myalowenkosi Sabela, Sebastien Balme, Mikhael Bechelany, Jean‐Marc Janot, more

Advanced Engineering Materials > 19 > 12 > n/a - n/a

The nanoparticle colorimetric‐based methods have been extensively used for rapid detection, however there are few limitations which can be kept under control or avoided by understanding the crucial parameters involved in these reactions. This review addresses the main parameters that influence colorimetric‐based methods and provides a rational classification of the current approaches, by focusing...

article

Functionalization of single solid state nanopores to mimic biological ion channels: A review

Mathilde Lepoitevin, Tianji Ma, Mikhael Bechelany, Jean-Marc Janot, more

Advances in Colloid and Interface Science > 2017 > 250 > C > 195-213

In nature, ion channels are highly selective pores and act as gate to ensure selective ion transport, allowing ions to cross the membrane. By mimicking them, single solid state nanopore devices emerge as a new, powerful class of molecule sensors that allow for the label-free detection of biomolecules (DNA, RNA, and proteins), non-biological polymers, as well as small molecules. In this review, we...

article

Large-scale protein/antibody patterning with limiting unspecific adsorption

Viktoriia Fedorenko, Mikhael Bechelany, Jean-Marc Janot, Valentyn Smyntyna, more

Journal of Nanoparticle Research > 2017 > 19 > 10 > 1-8

A simple synthetic route based on nanosphere lithography has been developed in order to design a large-scale nanoarray for specific control of protein anchoring. This technique based on two-dimensional (2D) colloidal crystals composed of polystyrene spheres allows the easy and inexpensive fabrication of large arrays (up to several centimeters) by reducing the cost. A silicon wafer coated with a thin...

article

Adsorption and photophysical properties of fluorescent dyes over montmorillonite and saponite modified by surfactant

Vidhyadevi Tangaraj, Jean-Marc Janot, Maguy Jaber, Mikhael Bechelany, more

Chemosphere > 2017 > 184 > C > 1355-1361

In the present study, the adsorption capacities of two intercalated smectites, CTAB-saponite and CTAB-montmorillonite with a cationic surfactant, were investigated with three fluorescent dyes namely Rhodamine 640 perchlorate rhodamine (Rho), sulforhodamine B (SR) and Kiton red 620 (KR). The adsorption isotherms fit well with the non-linear Langmuir isotherm model and the maximum adsorption capacities...

article

Structure and antibacterial activity relationships of native and amyloid fibril lysozyme loaded on layered double hydroxide

Zaineb Bouaziz, Laurence Soussan, Jean-Marc Janot, Mathilde Lepoitevin, more

Colloids and Surfaces B: Biointerfaces > 2017 > 157 > C > 10-17

Lysozyme from hen egg white is composed by a unique linear chain of 129 amino acids. It is known to inhibit Gram positive bacteria and to form amyloid fibrils at low pH, under 75°C. This work investigates the effect of the fibrillation and/or adsorption onto a layered double hydroxide material on the antibacterial properties of lysozyme. The kinetics of adsorption follows a behavior of pseudo second...

article

Adsorption of nisin into layered double hydroxide nanohybrids and in-vitro controlled release

Zaineb Bouaziz, Mohamed Amine Djebbi, Laurence Soussan, Jean-Marc Janot, more

Materials Science and Engineering: C > 2017 > 76 > C > 673-683

Layered double hydroxide (LDH) nanohybrid intercalated biomolecules, including oligonecluotides, genes and peptides/proteins, have attracted particular attention since they exhibit improved safety and effectiveness as successful delivery biosystems. The current study specifically investigated the adsorption of nisin peptide and precisely the control of the release of the payload. Adsorption occurred...

article

Non-Fluorescence label protein sensing with track-etched nanopore decorated by avidin/biotin system

Mathilde Lepoitevin, Mikhael Bechelany, Emmanuel Balanzat, Jean-Marc Janot, more

Electrochimica Acta > 2016 > 211 > C > 611-618

Single nanopore technology permits to design a biosensor, able to detect proteins without the use of specific probe. In this work, we have fashioned cylindrical nanopore by track-etched technique and atomic layer deposition. The nanopore was then decorated by the asymmetric tethering of biotin. From the rectification of the I–V response induced by the asymmetry of the nanopore, we demonstrate the...

article

Physico-chemical characterization of lake pigments based on montmorillonite and carminic acid

Frédéric Fournier, Laurence de Viguerie, Sebastien Balme, Jean-Marc Janot, more

Applied Clay Science > 2016 > 130 > C > 12-17

Hybrid materials based on one organic dye, the carminic acid, and montmorillonite have been prepared and characterized by a multi-technical approach. Aluminum and tin II cations were used in the experimental mixtures in order to have a chelating effect with the carminic acid. X-Ray diffraction patterns (XRD) did not highlight any intercalation of the organic molecule in the interlayer space, a result...

article

Fluorescence Quenching of Sulforhodamine Dye over Graphene Oxide and Boron Nitride Nanosheets

Vidhyadevi Thangaraj, Jules Bussiere, Jean‐Marc Janot, Mikhael Bechelany, more

European Journal of Inorganic Chemistry > 2016 > 13‐14 > 2125 - 2130

We report the fluorescence quenching of sulforhodamine 640 (SR 640) supported on graphene oxide (GO) and boron nitride (BN) nanosheets (NSs). The synthesis and characterization of both materials are described. X‐ray diffraction (XRD), Raman spectroscopy, atomic force microscopy (AFM), transmission and scanning electron microscopy (TEM and SEM), and the Brunauer–Emmett–Teller (BET) method were used...

article

Ionic Transport through Uncharged Nanopores

Sébastien Balme, Fabien Picaud, Manoel Manghi, John Palmeri, more

Biophysical Journal > 2016 > 110 > 3 Supplement 1 > 655a

article

Nanopore as a Sensor Based on Avidin-Biotin System

Mathilde Lepoitevin, Mikhael Bechelany, Emmanuel Balanzat, Jean-Marc Janot, more

Biophysical Journal > 2016 > 110 > 3 Supplement 1 > 337a

article

Towards New Insights in the Sterol/Amphotericin Nanochannels Formation: A Molecular Dynamic Simulation Study

Khaoula Boukari, Sébastien Balme, Jean-Marc Janot, Fabien Picaud

The Journal of Membrane Biology > 2016 > 249 > 3 > 261-270

Amphotericin B (AmB) is a well-known polyene which self-organizes into membrane cell in order to cause the cell death. Its specific action towards fungal cell is not fully understood but was proved to become from sterol composition. The mechanism was shown experimentally to require the formation of stable sterol/polyene couples which could then organize in a nanochannel. This would allow the leakage...

article

Detection of short ssDNA and dsDNA by current-voltage measurements using conical nanopores coated with Al₂O₃ by atomic layer deposition

Vidhyadevi Thangaraj, Mathilde Lepoitevin, Michael Smietana, Emmanuel Balanzat, more

Microchimica Acta > 2016 > 183 > 3 > 1011-1017

DNA detection using solid state nanopores is limited by the difficulty of the detection of short DNA strands due to their very short dwell time. Here, we report on the fabrication of nanopores using a track-etching technique along with the atomic layer deposition of aluminum oxide. This method allows shaping of conical nanopores, controlling their diameter, and passivation of the surface by Al₂O₃...

article

Selectivity against proton in cation permeable hybrid solid state membrane

Fabien Picaud, Khaoula Boukari, Sébastien Balme, Jean Marc Janot, more

Computational Materials Science > 2016 > 111 > C > 380-386

Theoretical investigations based principally on Monte Carlo calculations were conducted to interpret the hindered mobility of protons which was experimentally observed in a hybrid biological/artificial nanopore constituted of the ion bio-channel gramicidin A confined inside an artificial solid-state nanopore. We show that this experimental outcome may result from the high concentration of gramicidin...

article

Biological Channel Confinement in Nanostructured Nanopore

Sébastien Balme, Mathilde Lepoitevin, Adib Abou-Chayaa, Mikhael Bechelany, more

Biophysical Journal > 2015 > 108 > 2 Supplement 1 > 484a

article

Gold nanoparticles for the bare-eye based and spectrophotometric detection of proteins, polynucleotides and DNA

Mathilde Lepoitevin, Marie Lemouel, Mikhael Bechelany, Jean-Marc Janot, more

Microchimica Acta > 2015 > 182 > 5-6 > 1223-1229

We have explored the potential of using gold nanoparticles (Au-NPs) in optical and bare-eye discrimination of (a) proteins (such as bovine serum albumin and lysozyme), (b) homo-polynucleotides (such as poly-adenylic acid, poly-cytidylic acid, poly-uridylic acid and poly-inosinic acid), and (c) long chain DNA (from salmon, herring and thym). Such biomacromolecules can be detected and discriminated...

article

Continuous sensing of hydrogen peroxide and glucose via quenching of the UV and visible luminescence of ZnO nanoparticles

Dzmitry Sodzel, Volodymyr Khranovskyy, Valerio Beni, Anthony P. F. Turner, more

Microchimica Acta > 2015 > 182 > 9-10 > 1819-1826

We report on an indirect optical method for the determination of glucose via the detection of hydrogen peroxide (H₂O₂) that is generated during the glucose oxidase (GOx) catalyzed oxidation of glucose. It is based on the finding that the ultraviolet (~374 nm) and visible (~525 nm) photoluminescence of pristine zinc oxide (ZnO) nanoparticles strongly depends on the concentration of H₂O₂ in water solution...

article

BSA and lysozyme adsorption on homoionic montmorillonite: Influence of the interlayer cation

Mathilde Lepoitevin, Maguy Jaber, Régis Guégan, Jean-Marc Janot, more

Applied Clay Science > 2014 > 95 > Complete > 396-402

This study aims to investigate the influence of interlayer cation alkali metal series (Li ⁺ , Na ⁺ , K ⁺ , Rb ⁺ , Cs ⁺ ) and alkali earth metal (Mg ²⁺ , Ca ²⁺ , Ba ²⁺ ) on adsorption of model proteins (lysozyme and bovine serum albumin). The localizations of both proteins and their conformational modifications in the interlayer space...

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FLUORESCENCE (4)
MONTMORILLONITE (3)
ADSORPTION (2)
AVIDIN (2)
CARMINIC ACID (2)
LAYERED DOUBLE HYDROXIDE (LDH) (2)
MEMBRANE (2)
NANOPORE (2)
NMR (2)
PROTEIN ADSORPTION (2)
SIMULATIONS (2)
ABSORPTION (1)
ADSORPTION ISOTHERM (1)
ALEXA-FLUOR-594 (1)
ALIZARIN (1)
ALUMINOSILICATES (1)
ALUMINUM OXIDE (1)
AMYLOID FIBRILS (1)
ANISOTROPY (1)
ANTI-FOULING (1)
ANTIBACTERIAL ACTIVITY (1)
ATOMIC LAYER DEPOSITION (1)
AVIDIN ALEXA FLUOR CONJUGATE (1)
BIOCOMPATIBILITY (1)
BIOMATERIALS (1)
BIOSENSOR (1)
BIOSENSOR APPLICATIONS (1)
BIOTIN (1)
BORON (1)
COLORIMETRIC (1)
COLORIMETRIC‐BASED METHODS AGGREGATION (1)
CONDUCTOMETRY (1)
CONFOCAL FLUORESCENCE (1)
CONTROLLED RELEASE (1)
CURRENT RECTIFICATION (1)
DNA (1)
DNA TRANSLOCATION (1)
DWELL TIME (1)
ELECTRON TRANSFER (1)
ENERGY TRANSFER (1)
FLUORESCENT DYES (1)
FLUORESCENT LABEL (1)
GLUCOSE BIOSENSOR (1)
GOLD AND SILVER NANOPARTICLES (1)
GOLD NANOPARTICLE (1)
GRAMICIDIN (1)
GRAPHENE OXIDE (1)
HOMOIONIC-CLAY (1)
HYBRID MATERIALS (1)
HYBRID PIGMENT (1)
HYDROGEN PEROXIDE (1)
IONIC DIODE (1)
LAKE PIGMENTS (1)
LANGMUIR ISOTHERM (1)
LARGE-SCALE NANOARRAY (1)
LIFETIME (1)
LYSOZYME (1)
MATÉRIAUX MÉSOPOREUX (1)
MESOPOROUS MATERIALS (1)
MICA (1)
NANOBIOTECHNOLOGY (1)
NANOPARTICLES (1)
NANOPARTICULES (1)
NANOSPHERE (1)
NANOSTRUCTURES (1)
NISIN (1)
NITRIDES (1)
OPTICAL ASSAY (1)
OSMOTIC ENERGY (1)
PATCH-CLAMP AMPLIFIER (1)
PHOSPHATIDYLCHOLINE (1)
PHOSPHORYLCHOLINE (1)
PHOTOAGING (1)
PHOTOLUMINESCENCE (1)
PILLARED CLAY (1)
PMHS (1)
POLYENE (1)
PORPHYRIN (1)
PROTEIN SENSOR (1)
PROTON (1)
SAPONITE (1)
TIME RESOLED FLUORESCENCE SPECTROSCOPY (1)
TIME RESOLVED FLUORESCENCE (1)
TRACK ETCHING (1)
TRACK-ETCHED MEMBRANE (1)
ULTRAFILTRATION (1)
ZNO (1)
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Elsevier (19)
Springer (5)
ACS (3)
Wiley (2)
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Biophysical Journal (3)
Microchimica Acta (3)
Applied Clay Science (2)
Colloids and Surfaces B: Biointerfaces (2)
Journal of Membrane Science (2)
Journal of Photochemistry & Photobiology, A: Chemistry (2)
Advanced Engineering Materials (1)
Advances in Colloid and Interface Science (1)
Biomacromolecules (1)
Chemical Physics Letters (1)
Chemosphere (1)
Comptes rendus - Chimie (1)
Computational Materials Science (1)
Dyes and Pigments (1)
Electrochimica Acta (1)
European Journal of Inorganic Chemistry (1)
IET Nanobiotechnology (1)
Journal of Nanoparticle Research (1)
Langmuir (1)
Materials Science and Engineering: C (1)
Nano Letters (1)
The Journal of Membrane Biology (1)
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INFONA - science communication portal

Search results for: Jean-Marc Janot

When anthraquinone dyes meet pillared montmorillonite: Stability or fading upon exposure to light?

Large osmotic energy harvesting from functionalized conical nanopore suitable for membrane applications

A Review of Gold and Silver Nanoparticle‐Based Colorimetric Sensing Assays

Functionalization of single solid state nanopores to mimic biological ion channels: A review

Large-scale protein/antibody patterning with limiting unspecific adsorption

Adsorption and photophysical properties of fluorescent dyes over montmorillonite and saponite modified by surfactant

Structure and antibacterial activity relationships of native and amyloid fibril lysozyme loaded on layered double hydroxide

Adsorption of nisin into layered double hydroxide nanohybrids and in-vitro controlled release

Non-Fluorescence label protein sensing with track-etched nanopore decorated by avidin/biotin system

Physico-chemical characterization of lake pigments based on montmorillonite and carminic acid

Fluorescence Quenching of Sulforhodamine Dye over Graphene Oxide and Boron Nitride Nanosheets

Ionic Transport through Uncharged Nanopores

Nanopore as a Sensor Based on Avidin-Biotin System

Towards New Insights in the Sterol/Amphotericin Nanochannels Formation: A Molecular Dynamic Simulation Study

Detection of short ssDNA and dsDNA by current-voltage measurements using conical nanopores coated with Al₂O₃ by atomic layer deposition

Selectivity against proton in cation permeable hybrid solid state membrane

Biological Channel Confinement in Nanostructured Nanopore

Gold nanoparticles for the bare-eye based and spectrophotometric detection of proteins, polynucleotides and DNA

Continuous sensing of hydrogen peroxide and glucose via quenching of the UV and visible luminescence of ZnO nanoparticles

BSA and lysozyme adsorption on homoionic montmorillonite: Influence of the interlayer cation

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