Laboratoire de réactivité de surface

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  • Article dans une revue

Smartphone-assisted plasmonic biosensors for rapid on-site detection of foodborne pathogens and allergens

Walid Ait Mammar, Axel Wilson, Antoine Miche, Thomas Kuntzel, Michèle Salmain, Souhir Boujday

We report the design of a smartphone-assisted plasmonic immunosensor and its application to the detection of several food contaminants, namely staphylococcal enterotoxin A (SEA), bovine β-lactoglobulin (BLG), and hen egg white lysozyme (LYSO). Comprehensive characterization of antibodies was…

Talanta, 2025, 291, pp.127864. ⟨10.1016/j.talanta.2025.127864⟩. ⟨hal-04977805⟩

  • Article dans une revue

Spiky gold shells on magnetic particles for DNA biosensors

Erin Bedford, Souhir Boujday, Claire-Marie Pradier, Frank Gu

Combined separation and detection of biomolecules has the potential to speed up and improve the sensitivity of disease detection, environmental testing, and biomolecular analysis. In this work, we synthesized magnetic particles coated with spiky nanostructured gold shells and used them to…

Talanta, 2018, 182, pp.259 - 266. ⟨10.1016/j.talanta.2018.01.094⟩. ⟨hal-01777933⟩

  • Article dans une revue

A fullerene helical peptide: synthesis, characterization and formation of self-assembled monolayers on gold surfaces

Houssein Nasrallah, Jad Rabah, Van Bui-Thi-Tuyet, Krystyna Baczko, Hélène Fensterbank, Flavien Bourdreux, Anne-Marie Goncalves, Valérie Declerck, Souhir Boujday, Vincent Humblot, Karen Wright, Anne Vallée, Emmanuel Allard

The synthesis of a C60-peptide using "clickable" fullerene and peptide derivatives is described. The peptide is composed of a repeating sequence of -aminoisobutyric acid (Aib) and two L-Alanine (Ala) residues, promoting the formation of a helical conformation, which has been confirmed by…

New Journal of Chemistry, 2018, 42 (24), pp.19423-19432. ⟨10.1039/c8nj04599b⟩. ⟨hal-02348881⟩

  • Article dans une revue

Revealing the Interplay between Adsorbed Molecular Layers and Gold Nanoparticles by Linear and Nonlinear Optical Properties

Laetitia Dalstein, Maroua Ben Haddada, Grégory Barbillon, Christophe Humbert, Abderrahmane Tadjeddine, Souhir Boujday, Bertrand Busson

Gold nanoparticles (AuNPs) chemically grafted on substrates are widely used as sensors due to their plasmonic properties. The efficiency and robustness of such sensors strongly depend on the molecular sublayer structure, which influences the distribution of AuNPs, and therefore the plasmonic…

Journal of Physical Chemistry C, 2015, 119 (30), pp.17146-17155. ⟨10.1021/acs.jpcc.5b03601⟩. ⟨hal-02111041⟩

  • Article dans une revue

Conversion of syngas-derived C 2 + mixed oxygenates to C 3 –C 5 olefins over Zn x Zr y O z mixed oxide catalysts

Colin Smith, Vanessa Lebarbier Dagle, Matthew Flake, Karthikeyan K. Ramasamy, Libor Kovarik, Mark Bowden, Thomas Onfroy, Robert A. Dagle

In this study we report on a ZnxZryOz mixed oxide type catalyst capable of converting a syngas-derived C2+ mixed oxygenate feedstock to isobutene-rich olefins. Aqueous model feed comprising of ethanol, acetaldehyde, acetic acid, ethyl acetate, methanol, and propanol was used as representative…

Catalysis Science & Technology, 2015, 6 (7), pp.2325 - 2336. ⟨10.1039/C5CY01261A⟩. ⟨hal-01547866⟩

  • Article dans une revue

Self-Assembly of (S)-Glutamic Acid on Ag(100): A Combined LT-STM and Ab Initio Investigation

M. Smerieri, L. Vattuone, Dominique Costa, Frederik Tielens, L. Savio

Self-assembly of org. mols. at metal surfaces is of greatest importance in nanoscience; in fact, it opens new perspectives in the field of mol. electronics and in the study of biocompatible materials. Combining an exptl. low-temp. scanning tunneling microscopy investigation with ab initio calcns.,…

Langmuir, 2010, 26 (10), pp.7208-7215. ⟨10.1021/la904331d⟩. ⟨hal-00604800⟩

  • Article dans une revue

Adsorption of l-DOPA Intercalated in Hydrated Na-Saponite Clay: A Combined Experimental and Theoretical Study

K. El Adraa, V. Timon, J.-F. Lambert, Abdel-Rahman Al-Rabaa, F. Jaber, M. Jaber, Frederik Tielens

The intercalation of L-DOPA into the interlayer space of saponite, a 2:1 phyllosilicate, and the nature of host−guest interactions are investigated by a combined experimental and theoretical approach. L-DOPA zwitterions are accommodated vertically in the interlayer region as a bilayer of partially…

Journal of Physical Chemistry C, 2012, 116, pp.26414−26421. ⟨10.1021/jp3094148⟩. ⟨hal-00808607⟩

  • Article dans une revue

Drastic Au(111) Surface Reconstruction upon Insulin Growth Factor Tripeptide Adsorption

Vincent Humblot, Anne Vallee, Ahmed Naitabdi, Frederik Tielens, Claire-Marie Pradier

Adsorption of biomolecules at metal surfaces often creates two-dimensional ordering of the adlayers. However, metal substrate reconstruction is less commonly observed, unless upon annealing of the molecule−surface system. Here, we report on the drastic room-temperature reconstruction of the Au(111…

Journal of the American Chemical Society, 2012, 134, pp.6579−6583. ⟨10.1021/ja302530q⟩. ⟨hal-00748253⟩

  • Article dans une revue

Chromium Oxide Species Supported on Silica: A Representative Periodic DFT Model

Hazar Guesmi, Frederik Tielens

The Cr/SiO2 system is investigated using periodic DFT. The model represents the amorphous character of the silica surface and allows the investigation of the effect of hydration on the Cr(VI) monomers. First, the geometry and energetics are discussed and compared with experimental data. The phase…

Journal of Physical Chemistry C, 2011, 116, pp.994-1001. ⟨10.1021/jp209680r⟩. ⟨hal-00690824⟩

  • Article dans une revue

Characterization of omega-functionalized undecanethiol mixed self-assembled monolayers on Au(111): A combined polarization modulation infrared reflection-absorption spectroscopy/X-ray photoelectron spectroscopy/periodic density functional theory study

Frederik Tielens, Dominique Costa, Vincent Humblot, Claire-Marie Pradier

The structure of undecanethiol self-assembled monolayers (SAMs) on Au(111) with -COOH and -OH tail groups has been characterized by combining experimental and theoretical techniques. The pure and mixed 1:1 SAMs were investigated. It was found using polarization modulation infrared reflection-…

Journal of Physical Chemistry C, 2008, 112 (1), pp.182-190. ⟨10.1021/jp074023c⟩. ⟨hal-01361366⟩