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Spontaneous growth of 2D coordination polymers on functionalized ferromagnetic surfaces

DOI: 10.1039/C8SC03067G DOI Help

Authors: Michele Mattera (Universitat de València) , Victor Rubio-gimenez (Universitat de València) , Sophie Delprat (CNRS) , Richard Mattana (CNRS) , Pierre Seneor (CNRS) , Sergio Tatay (Universitat de València) , Alicia Forment-aliaga (Universitat de València) , Eugenio Coronado (Universitat de València)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Chemical Science , VOL 96

State: Published (Approved)
Published: September 2018
Diamond Proposal Number(s): 14922

Open Access Open Access

Abstract: The spontaneous growth of lamellar metal-alkanethiolates (LMAs) on reactive ferromagnetic surfaces as a result of surface oxidation has been observed. When alkanethiol self-assembled monolayers (SAMs) grown under an inert atmosphere over cobalt or permalloy (Ni80Fe20) are exposed to air, oxygen diffuses through the molecular layer. This induces an oxidation of metal atoms at the metal surface and a release of the resulting metal cations that migrate coordinated by the alkanethiol molecules to form lamellar structures over the SAMs. This process has been imaged in real-time, under ambient conditions, by means of different microscopy techniques. The influence of the alkyl chain length, the nature of the ferromagnet, the temperature and the atmospheric moisture on the number, area and height of the resulting features has been systematically evaluated. Remarkably, the possibility to follow the migration in real-time makes it a promising model system for the study of surface/molecule interface processes. Most importantly, the composition and crystallinity of these LMAs have been studied, evidencing that real 2D coordination polymers are formed on the surface. Hence, one could envision this strategy as a new method for the assembly of more complex low-dimensional (2D) magnetic materials based on coordination polymers.

Subject Areas: Materials, Chemistry, Physics


Instruments: I07-Surface & interface diffraction

Other Facilities: Alba; Soleil

Documents:
c8sc03067g.pdf