Nanotechnology on Surfaces Laboratory, Instituto de Ciencia de Materiales de Sevilla, CSIC-Universidad de Sevilla, c/Américo Vespucio 49, Sevilla, Spain, Department of Materials Science and Metallurgy, University of Cambridge, 27 Charles Babbage Road, Cambridge, United Kingdom, University of Grenoble Alpes, Grenoble F-38000, CEA, LETI, MINATEC Campus, Grenoble, France, Synchrotron SOLEIL, L'Orme des Merisiers, BP 48 Saint Aubin, Gif-sur-Yvette, France, SPEC, CEA, CNRS, Université Paris-Saclay, Gif-sur-Yvette, France

In this article we show for the first time the formation of magnetic supported organic nanowires (ONWs) driven by self-assembly of a nonplanar Fe(III) phthalocyanine chloride (FePcCl) molecule. The ONWs grow by a crystallization mechanism on roughness-tailored substrates. The growth methodology consists of a vapor deposition under low vacuum and mild temperature conditions. The structure, microstructure, and chemical composition of the FePcCl NWs are thoroughly elucidated and compared with those of Fe(II) phthalocyanine NWs by a consistent and complementary combination of advanced electron microscopies and X-ray spectroscopies. In a further step, we vertically align the NWs by conformal deposition of a SiO2 shell. Such orientation is critical to analyze the magnetic properties of the FePcCl and FePc supported NWs. A ferromagnetic behavior below 30 K with an easy axis perpendicular to the phthalocyanine plane was observed in the two cases with the FePcCl nanowires presenting a wider hysteresis. These results open the path to the fabrication of nanostructured one-dimensional small-molecule spintronic devices. © 2018 American Chemical Society.

Chlorine compounds, Deposition, Iron oxides, Magnetic properties, Magnetism, Molecules, Nanowires, Self assembly, Silica, Silicon compounds, Vapor deposition, X ray spectroscopy, Chemical compositions, Conformal deposition, Crystallization mechanisms, Ferromagnetic behaviors, Mild temperatures, Organic nanowires, Small molecules, Spintronic device, Iron compounds