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Tailoring a compact and stable Langmuir bi-dimensional PbX-based layered perovskite film at the air–water interface and on solid support
- Ariza-Carmona, Luisa, García-Espejo, Gonzalo, Martín-Romero, María T., Camacho, Luis
- Journal of colloid and interface science 2017 v.498 pp. 194-201
- X-ray diffraction, X-ray photoelectron spectroscopy, air, cations, liquid-air interface
- The present work studies the stability of Langmuir organic–inorganic superlattice materials thin films consisting of layered perovskite-based films with controlled 2D framework as well as to design experimental conditions for increasing the efficiency of the organic–inorganic perovskite motif by mechanical stimulus. Therefore, a whole covering of the air/water interface by a compact and stable lead-based layered perovskite structure is pursued. A 2D layered perovskite-type hybrid structure of the form [(CH3(CH2)19NH3)2(PbX4)], X=Cl, and Br, in which, two-dimensional sheets stabilized by a inner bilayer of organic monoammonium cation matrix, is mechanically tailored by successive compression-expansion cycles. The formation of 2D molecular patterns has been characterized by ΔR, BAM, XRD and XPS.