Origin of the Differential Nanoscale Reactivity of Biologically and Chemically Formed Green Rust Crystals Investigated by Chemical Force Spectroscopy
| Autor: | Grégory Francius, Asfaw Zegeye, Pierre Schaaf, Marjorie Etique, Christian Ruby, Cédric Carteret |
|---|---|
| Přispěvatelé: | Laboratoire de Chimie Physique et Microbiologie pour l'Environnement (LCPME), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Institut de Chimie du CNRS (INC), Laboratoire de Génétique Médicale (LGM), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM), Institut Charles Sadron (ICS), Université de Strasbourg (UNISTRA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Réseau nanophotonique et optique, Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Matériaux et nanosciences d'Alsace (FMNGE), Institut de Chimie du CNRS (INC)-Université de Strasbourg (UNISTRA)-Université de Haute-Alsace (UHA) Mulhouse - Colmar (Université de Haute-Alsace (UHA))-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université de Lorraine (UL), Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Terre et Environnement de Lorraine (OTELo), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
BACTERIAL
Passivation Inorganic chemistry HYDROXYSULPHATE Nanoparticle 02 engineering and technology 010501 environmental sciences OXIDATION 01 natural sciences POLYSACCHARIDES COPRECIPITATION RAMAN DISSOLUTION Microscopy [CHIM]Chemical Sciences WATER Reactivity (chemistry) Physical and Theoretical Chemistry [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces environment Dissolution ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences Chemistry IRON Force spectroscopy MICROSCOPY 021001 nanoscience & nanotechnology Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Chemical force microscopy Chemical engineering Surface-area-to-volume ratio [SDE]Environmental Sciences 0210 nano-technology |
| Zdroj: | Journal of Physical Chemistry C Journal of Physical Chemistry C, American Chemical Society, 2014, 118 (11), pp.5978-5987. ⟨10.1021/jp500462r⟩ |
| ISSN: | 1932-7447 1932-7455 |
| DOI: | 10.1021/jp500462r⟩ |
| Popis: | International audience; Iron-containing nanoparticles, such as green rusts, can be formed by either chemical (c-GR) or biological (b-GR) pathways. It is known that c-GRs display very high reactivity toward organic and inorganic contaminants and thus have great potential for the remediation of contaminated environments, whereas b-GRs are very weakly reactive. This reactivity difference is usually attributed to much higher surface/volume ratio of c-GR compared to b-GR Using atomic and chemical force microscopy to probe the reactivity at the nanoscale of both types of nanoparticles, we are able to show that the primary reason for the low reactivity of b-GR is not the low surface/volume ratio but the passivation of the surface due to the presence of biological exopolymers (EPS). This conclusion should hold true for many biological nanoparticles and allows us to explain their often observed low, yet unexplained, reactivity. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|