Tailoring a compact and stable Langmuir bi-dimensional PbX-based layered perovskite film at the air-water interface and on solid support

Luisa Ariza-Carmona; Gonzalo García-Espejo; María T Martín-Romero; Luis Camacho

doi:10.1016/j.jcis.2017.03.054

Tailoring a compact and stable Langmuir bi-dimensional PbX-based layered perovskite film at the air-water interface and on solid support

J Colloid Interface Sci. 2017 Jul 15:498:194-201. doi: 10.1016/j.jcis.2017.03.054. Epub 2017 Mar 14.

Authors

Luisa Ariza-Carmona¹, Gonzalo García-Espejo¹, María T Martín-Romero², Luis Camacho¹

Affiliations

¹ Institute of Fine Chemistry and Nanochemistry, Department of Physical Chemistry and Applied Thermodynamics, University of Córdoba, Campus Universitario de Rabanales, Edificio Marie Curie, Córdoba E-14014, Spain.
² Institute of Fine Chemistry and Nanochemistry, Department of Physical Chemistry and Applied Thermodynamics, University of Córdoba, Campus Universitario de Rabanales, Edificio Marie Curie, Córdoba E-14014, Spain. Electronic address: mtmartin@uco.es.

PMID: 28324725
DOI: 10.1016/j.jcis.2017.03.054

Abstract

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.

Keywords: 2D layered perovskite-type hybrid structure; Air/water interface; BAM morphology; Compact and stable film; [(CH(3)(CH(2))(19)NH(3))(2)(PbX(4))], X=Cl, and Br.