Microphase Separation of Binary Liquids Confined in Cylindrical Pores
| Autor: | A. Razzak Abdel Hamid, Ramona Mhanna, Aziz Ghoufi, Denis Morineau, Christiane Alba-Simionesco, Ronan Lefort, Bernhard Frick |
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| Přispěvatelé: | Institut de Physique de Rennes (IPR), Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Centre National de la Recherche Scientifique (CNRS), Institut Laue-Langevin (ILL), ILL, Laboratoire Léon Brillouin (LLB - UMR 12), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Centre National de la Recherche Scientifique (CNRS)-Université Paris-Saclay, Rennes Métropole, European Regional Development Fund, Université de Rennes (UR)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS) |
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Neutron diffraction Analytical chemistry Scattering length 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Core (optical fiber) General Energy Atomic radius Chemical physics Surface layer Physics::Chemical Physics Physical and Theoretical Chemistry 0210 nano-technology [PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft] Nanoscopic scale Intensity (heat transfer) Mesoporous silicate |
| Zdroj: | Journal of Physical Chemistry C Journal of Physical Chemistry C, American Chemical Society, 2016, 120 (17), pp.9245-9252. ⟨10.1021/acs.jpcc.6b01446⟩ Journal of Physical Chemistry C, 2016, 120 (17), pp.9245-9252. ⟨10.1021/acs.jpcc.6b01446⟩ |
| ISSN: | 1932-7455 1932-7447 |
| DOI: | 10.1021/acs.jpcc.6b01446 |
| Popis: | International audience; We have investigated the structure of tert-Butanol-Toluene liquid mixtures when confined in the cylindrical channels of MCM-41 mesoporous silicate, and we can conclude on the existence of a micro-phase-separated tubular structure of these binary liquids although fully miscible in bulk conditions. Neutron diffraction experiments with selective isotopic compositions have been performed to vary systematically the scattering length density and thus to highlight different mixture components. The observed apparently anomalous variation of the intensity of the Bragg peaks of the MCM-41 after filling demonstrates without further analysis that the liquid mixture must be inhomogeneous at the nanoscale. Our experimental observations can be rationalized when comparing with the predictions of simple core-shell models. Within this core-shell model we deduce that tert-Butanol segregates as a pore surface layer of about one atomic size surrounding a Toluene-rich core of 2 – 3 atomic layers. |
| Databáze: | OpenAIRE |
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