Naima Maouche

University Ferhat Abbas of Setif

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Belkacem Nessark

University Ferhat Abbas of Setif

Mohamed M. Chehimi

Université Paris Cité

Najla Fourati

Laboratoire des systèmes et applications des technologies de l'information et de l'énergie

Houssem Eddine El Yamine Sakhraoui

University Ferhat Abbas of Setif

Chouki Zerrouki

Conservatoire National des Arts et Métiers

Idriss Bakas

Université Ibn Zohr

Nourdin Yaakoubi

Centre National de la Recherche Scientifique

Rachid Touzani

Mohamed I University

Ahmed Madani

Cairo University

Zouhair Ait‐Touchente

Institut des Sciences Analytiques

Cooperative Institutions

University Ferhat Abbas of Setif

Centre National de la Recherche Scientifique

Université Paris Cité

Interfaces Traitements Organisation et Dynamique des Systèmes

Délégation Paris 7

Centre de Recherche sur l'Information Scientifique et Technique

Sorbonne Paris Cité

Laboratoire d'Electrochimie Moléculaire

Sorbonne Université

Université Oran 1 Ahmed Ben Bella

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High Performance Zinc Oxide Nanorod-Doped Ion Imprinted Polypyrrole for the Selective Electrosensing of Mercury II Ions

Zouhair Ait‐Touchente Houssem Eddine El Yamine Sakhraoui Najla Fourati Chouki Zerrouki Naima Maouche

A biomimetic, ion-imprinted polymer (IIP) was prepared by electropolymerization of pyrrole at the surface of gold electrodes decorated with vertically grown ZnO nanorods. The vertical growth of the nanorods was achieved via an ultrathin aryl monolayer grafted by reduction of diazonium salt precursor. Pyrrole was polymerized in the presence of L-cysteine as chelatant agent and Hg(II) (template). Hg(II)-imprinted polypyrrole (PPy) was also prepared on bare gold electrode in order to compare the two methods of sensor design (Au-ZnO-IIP vs Au-IIP). Non-imprinted PPy was prepared in the same conditions, however in the absence of any Hg2+ template. The strategy combining diazonium salt modification and ZnO nanorod decoration of gold electrodes permitted to increase considerably the specific surface and thus to improve the sensor performances. The limit of detection (LOD) of the designed sensor was ~1 pM, the lowest value ever reported in literature. The dissociation constants between PPy and Hg2+ were estimated at [Kd1 = (7.89 ± 3.63) mM and Kd2 = (38.10 ± 9.22) pM]. The sensitivity of the designed sensor was found to be 0.692 ± 0.034 μA/pM. The Au-ZnO-IIP was found to be highly selective towards Hg(II) compared to cadmium, lead and copper ions. This sensor design strategy could open up new horizons in monitoring toxic heavy metal ions in water and therefore contribute to enhance environmental quality.

Polypyrrole

Nanorod

Photoresist

Pyrrole

10.20944/preprints202009.0077.v1

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Citations (8)

Aryl diazonium salt surface chemistry and ATRP for the preparation of molecularly imprinted polymer grafts on gold substrates

Surface and Interface Analysis (2010)

Sarra Gam‐Derouich Minh Ngoc Nguyen Ahmed Madani Naima Maouche Philippe Lang

Abstract Quercetin‐imprinted poly(vinyl pyridine‐co‐ethylene glycol dimethacrylate) cross‐linked grafts were prepared by atom transfer radical polymerization (ATRP) using aryl modified gold substrates as macroinitiators. The aryl layers were first attached to Au by electrochemical reduction of the diazonium salt BF $_{4}^{-}$ , + N 2 ‐C 6 H 4 ‐CH 2 CH 2 ‐OH. The resulting Au‐C 6 H 4 ‐CH 2 CH 2 ‐OH plates (Au‐OH) were further treated with 2‐bromopropionyl bromide (Br‐C(O)C(CH 3 ) 2 ‐Br) in order to attach ATRP initiator sites to Au‐OH, thus yielding Au‐C 6 H 4 ‐CH 2 CH 2 ‐OC(O)C(CH 3 ) 2 ‐Br (Au‐Br). 4‐Vinyl pyridine (4VP, functional monomer) and ethylene glycol dimethacrylate (EGDMA, cross‐linking monomer) were co‐polymerized in acetonitrile at room temperature in the presence of quercetin as a template molecule. Quercetin was then solvent‐extracted to obtain Au‐grafted molecularly imprinted polymer (Au‐MIP). The gold‐grafted nonimprinted polymer film (Au‐NIP) was prepared as a control substrate. The changes in the surface chemical composition, from the neat Au to Au‐MIP and Au‐NIP, were monitored by XPS and polarization modulation infrared reflection‐absorption spectroscopy (PM‐IRRAS). Cyclic voltammetry (CV) was used to assess the specificity and selectivity of Au‐MIP to detect quercetin. The detection limit was found to be better than 10 −6 mol/l with CV. Using square wave stripping voltammetry (SWSV), the detection limit was found to be as low as 10 −9 mol/l. Copyright © 2010 John Wiley & Sons, Ltd.

Ethylene glycol dimethacrylate

Molecularly imprinted polymer

Atom-transfer radical-polymerization

10.1002/sia.3210

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Citations (80)

Electrosynthesis, characterization and photoconducting performance of copolymer poly(terthiophene + sexithiophene + TiO2)/ITO composite material

Russian Journal of Applied Chemistry (2017)

Leila Hasniou Belkacem Nessark Naima Maouche

Photocurrent

Titanium Dioxide

Electrosynthesis

10.1134/s1070427217040206

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Citations (1)

Composites of polyanine/CdTe for corrosion protection of mild steel XC 70 in a 3.5% NaCl solution

Journal of Adhesion Science and Technology (2021)

Lila Mekhiche Naima Maouche Belkacem Nessark Linda Toukal Hassan Ayadi

In this work a novel composite of polyaniline and cadmium telluride was electrochemically synthesized on transparent indium thin oxide plates from an aqueous disulfuric acid solution 0.5 M. The aqueous disulfuric acid solution contained LiClO4 as a supporting electrolyte, aniline 0.01 M as a monomer and CdTe as a semi-conductor doping agent. Extensive experimental characterization results have shown the superior anticorrosion properties of such a material. The authors provide a review of all experimental data. As well, they quantify the above mentioned anticorrosion properties when applied to a mild stainless steel (XC 70). The electrochemical properties of the composites were evaluated by cyclic voltamperometry and electrochemical impedance spectroscopy and confirmed the notably enhanced anticorrosive properties of the synthesized composite material: This improved anti-corrosion performance was correlated to the exhibited large resistance and the greater double layer capacitance compared to those seen in pure PAni coatings. Anticorrosion behavior of the composite Polyaniline/CdTe compared with pure polyaniline coating on mild steel is investigated in a 3.5% NaCl solution of pH 1.73, using the electrochemical impedance spectroscopy (EIS) and polarization curves (Tafel) methods. It was found that the pristine PAni film improved the corrosion protection efficiency of mild steel when it was used as only a film without any additives. However, the composite PAni/CdTe coating was shown to significantly improve the protection of mild steel against corrosion due to the efficient anticorrosive properties of this composite. This result indicates that the use of the novel PAni/CdTe composite is rather a promising approach for protecting mild steel substrate from corrosion and that it may be used in other fields of interest.

10.1080/01694243.2021.1899508

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Citations (10)

Platinum electrode modified with polyterthiophene doped with metallic nanoparticles, as sensitive sensor for the electroanalysis of ascorbic acid (AA)

Arabian Journal of Chemistry (2015)

Naima Maouche Belkacem Nessark Idriss Bakas

A novel electrochemical sensor for ascorbic acid (AA) detection based on platinum electrode modified with polyterthiophene (P3T) and doped with metallic particles (Cu, Co, Ag, Au, Pd) was constructed. The electrocatalytic performances of the modified electrode with polyterthiophene-metallic particles related to the detection of AA, showed a better catalytic activity compared to the modified electrode with polyterthiophene film. The obtained results demonstrate also that the use of P3T–Ag nanocomposite allows a good sensitivity; which gives a high response in oxidation peak of AA. In order to have a good performance using this sensor, several parameters such as polymerization time of the film and immersion time of the film in AgNO3 solution were optimized.

Platinum nanoparticles

Electrochemical gas sensor

Noble metal

10.1016/j.arabjc.2015.04.029

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Citations (18)

Removal of Cd(II) and Co(II) ions from aqueous solutions by polypyrrole particles: Kinetics, equilibrium and thermodynamics

Journal of the Taiwan Institute of Chemical Engineers (2014)

Lamria Seid Dalila Chouder Naima Maouche Idriss Bakas Noureddine Barka

Polypyrrole

10.1016/j.jtice.2014.08.030

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Citations (26)

Design of L-Cysteine and Acrylic Acid Imprinted Polypyrrole Sensors for Picomolar Detection of Lead Ions in Simple and Real Media

IEEE Sensors Journal (2019)

Houssem Eddine El Yamine Sakhraoui Zouhour Mazouz Ghada Attia Najla Fourati Chouki Zerrouki

104 MHz surface acoustic wave sensors, functionalized with two polypyrrole (PPy) imprinted polymers, were designed for lead ion detection in liquid media. The main difference between the two ionic imprinted polymers (IIP) is related to the nature of the chelating agent: L-Cysteine (LCys) for the former and acrylic acid (AA) for the latter. Performances of the IIPs based sensors were compared in terms of sensitivity, limits of detection (LOD), dissociation constants and selectivity. The gravimetric results indicated that both designed sensors can detect picomolar concentrations of lead ions. These values are, in fact, significantly inferior to the World Health Organization (WHO) maximum accepted limit in drinking water, and among the lowest LODs ever reported in the literature. The relevant dissociation constants, calculated from the most appropriate fits of the calibration curves, were estimated at: Kd ₁ = (1.1 ± 0.4) × 10 ^-10 M and Kd ₂ = (1.1 ± 0.8) × 10 ^-5 M for L-Cys-IIP/Pb ²⁺ and Kd ₁ = (1.1 ± 0.3) × 10 ^-13 M and Kd ₂ = (5.9 ± 1.8) × 10 ^-10 M for AA-PPy-IIP/ Pb ²⁺ , thus confirming the strong binding between the designed IIPs and lead ions. Selectivity tests were investigated with mercury, cadmium, copper, zinc, and nickel divalent ions, which largely coexist with lead ions in soils, rivers, and wastewaters.

Dissociation constant

Acrylic acid

10.1109/jsen.2019.2961984

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Citations (20)

Corrosion resistance studies of copper and magnesium-doped fluorohydroxyapatite coatings on titanium biomaterial

Journal of Adhesion Science and Technology (2023)

Nawel Khenchoul Sabrina Halladja Naima Maouche Mohamed Litim Hassan Ayadi

AbstractThis study discusses the contribution of Cu2+ and Mg2+, two biologically important ions substituted into the structure of fluorohydroxyapatite. FHA, a partial substitution of fluorine ion in HA has received a great attention because it improves the corrosion resistance of orthopedic implants. Copper, Magnesium and copper-Magnesium doped fluorohydroxyapatite (FHA) coatings were electrochemical deposited on titanium (Ti) using a cyclic voltammetry technique. The coatings properties were identified by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The corrosion behavior of coated and uncoated samples, immersed for 7 days in aerated simulated body fluid (SBF) in a presence of 0.2 g/l human serum albumin (HAS) was investigated by potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The synergetic effect of albumin and doped elements on the degradation of Ti was studied. As a result of these investigations, it is revealed that: fluoride, copper and magnesium were successfully incorporated into apatite lattice structure. The additions of ions in FHA crystal matrix reduced the crystallite size, increased the crystallinity and changed the structure of F-hydroxyapatite. All the electrochemical techniques employed demonstrated that the coatings that were produced offered superior protection against corrosion for titanium when exposed to artificial body fluids. The nano-Mg-FHA coating improves effective protection to Ti and presents the highest corrosion resistance. The outcomes of this investigation were also compared with already published works to validate the research results.Keywords: Titaniumcorrosionfluoro hydroxyapatitecoatingsbiomedical implants Disclosure statementThe authors declare that they have no conflict of interest.

Simulated body fluid

Biomaterial

Biocompatibility

10.1080/01694243.2023.2251762

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Citations (0)

Thermal annealing ambiance effect on phosphorus passivation and reactivation mechanisms in silicon-based Schottky diodes hydrogenated by MW-ECR plasma

Semiconductor Physics Quantum Electronics & Optoelectronics (2021)

D. Belfennache D. Madi R. Yekhlef L. Toukal Naima Maouche

The main objective of this work is to investigate the effect of thermal annealing in forming gas atmosphere on the mechanism of deactivation and reactivation of phosphorus in silicon-based Schottky diodes. Firstly, the microwave plasma power, initial phosphorus concentration in the samples and hydrogen flux were fixed as 650 W, 1015 cm–3, and 30 sccm, respectively, to investigate the behavior of different working parameters of diodes, specifically the duration and temperature of hydrogenation. Secondly, few samples hydrogenated at 400 °C for 1 h were annealed under the forming gas (10% H2 + 90% N2) within the temperature range from 100 to 700 °C for 1 h. The profiles of active phosphorus concentration were monitored by evaluating the change in concentration of phosphorus after hydrogenation or thermal annealing in a forming gas environment through capacitance-voltage measurements. The obtained results depict the temperature and duration of hydrogenation, which ultimately reveals the complex behavior of phosphorous and hydrogen in silicon. However, the phosphorus passivation rate is homogeneous over all the depths measured at 400 °C. The thermal annealing in a forming gas indicates the increase in passivation rate of phosphorus as a function of annealing temperature, till the passivation rate attains saturation in the sample annealed at 400 °C. At higher temperatures, a decrease in the concentration of phosphorous-hydrogen complexes is observed due to the dissociation of these complexes and reactivation of phosphorus under thermal effect.

Passivation

Forming gas

10.15407/spqeo24.04.378

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Citations (5)

High Performance Zinc Oxide Nanorod-Doped Ion Imprinted Polypyrrole for the Selective Electrosensing of Mercury II Ions

Applied Sciences (2020)

Zouhair Ait‐Touchente Houssem Eddine El Yamine Sakhraoui Najla Fourati Chouki Zerrouki Naima Maouche

A biomimetic, ion-imprinted polymer (IIP) was prepared by electropolymerization of pyrrole at the surface of gold electrodes decorated with vertically grown ZnO nanorods. The vertical growth of the nanorods was achieved via an ultrathin aryl monolayer grafted by reduction of diazonium salt precursor. Pyrrole was polymerized in the presence of L-cysteine as chelating agent and Hg2+ (template). Hg2+-imprinted polypyrrole (PPy) was also prepared on a bare gold electrode in order to compare the two methods of sensor design (Au-ZnO-IIP vs. Au-IIP). Non-imprinted PPy was prepared in the same conditions but in the absence of any Hg2+ template. The strategy combining diazonium salt modification and ZnO nanorod decoration of gold electrodes permitted us to increase considerably the specific surface area and thus improve the sensor performance. The limit of detection (LOD) of the designed sensor was ~1 pM, the lowest value ever reported in the literature for gold electrode sensors. The dissociation constants between PPy and Hg2+ were estimated at [Kd1 = (7.89 ± 3.63) mM and Kd2 = (38.10 ± 9.22) pM]. The sensitivity of the designed sensor was found to be 0.692 ± 0.034 μA.pM-1. The Au-ZnO-IIP was found to be highly selective towards Hg2+ compared to cadmium, lead and copper ions. This sensor design strategy could open up new horizons in monitoring toxic heavy metal ions in water and therefore contribute to enhancing environmental quality.

Polypyrrole

Nanorod

10.3390/app10197010

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Citations (20)