Effect of nanostructuration on the spin crossover transition in crystalline ultrathin films
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Effect of nanostructuration on the spin crossover transition in crystalline ultrathin films

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Effect of nanostructuration on the spin crossover transition in crystalline ultrathin films

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dc.contributor.author Rubio-Giménez, Víctor
dc.contributor.author Bartual Murgui, Carlos
dc.contributor.author Galbiati, Marta
dc.contributor.author Núñez-López, Alejandro
dc.contributor.author Castells-Gil, Javier
dc.contributor.author Quinard, Benoit
dc.contributor.author Seneor, Pierre
dc.contributor.author Otero, Edwige
dc.contributor.author Ohresser, Philippe
dc.contributor.author Cantarero Sáez, Andrés
dc.contributor.author Coronado Miralles, Eugenio
dc.contributor.author Real Cabezos, José Antonio
dc.contributor.author Mattana, Richard
dc.contributor.author Tatay Aguilar, Sergio
dc.contributor.author Martí Gastaldo, Carlos
dc.date.accessioned 2019-05-02T14:03:05Z
dc.date.available 2019-05-02T14:03:05Z
dc.date.issued 2019
dc.identifier.uri http://hdl.handle.net/10550/70038
dc.description.abstract Mastering the nanostructuration of molecular materials onto solid surfaces and understanding how this process affects their properties are of utmost importance for their integration into solid-state electronic devices. This is even more important for spin crossover (SCO) systems, in which the spin transition is extremely sensitive to size reduction effects. These bi-stable materials have great potential for the development of nanotechnological applications provided their intrinsic properties can be successfully implemented in nanometric films, amenable to the fabrication of functional nanodevices. Here we report the fabrication of crystalline ultrathin films (<1-43 nm) of two-dimensional Hofmann-type coordination polymers by using an improved layer-by-layer strategy and a close examination of their SCO properties at the nanoscale. X-ray absorption spectroscopy data in combination with extensive atomic force microscopy analysis reveal critical dependence of the SCO transition on the number of layers and the microstructure of the films. This originates from the formation of segregated nanocrystals in early stages of the growth process that coalesce into a continuous film with an increasing number of growth cycles for an overall behaviour reminiscent of the bulk. As a result, the completeness of the high spin/low spin transition is dramatically hindered for films of less than 15 layers revealing serious limitations to the ultimate thickness that might be representative of the performance of the bulk when processing SCO materials as ultrathin films. This unprecedented exploration of the particularities of the growth of SCO thin films at the nanoscale should encourage researchers to put a spotlight on these issues when contemplating their integration into devices.
dc.language.iso eng
dc.relation.ispartof Chemical Science, 2019, vol. 10, p. 4038-4047
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Rubio-Giménez, Víctor Bartual Murgui, Carlos Galbiati, Marta Núñez-López, Alejandro Castells-Gil, Javier Quinard, Benoit Seneor, Pierre Otero, Edwige Ohresser, Philippe Cantarero Sáez, Andrés Coronado Miralles, Eugenio Real Cabezos, Jose Antonio Mattana, Richard Tatay Aguilar, Sergio Martí Gastaldo, Carlos 2019 Effect of nanostructuration on the spin crossover transition in crystalline ultrathin films Chemical Science 10 4038 4047
dc.subject Química
dc.title Effect of nanostructuration on the spin crossover transition in crystalline ultrathin films
dc.type info:eu-repo/semantics/article
dc.date.updated 2019-05-02T14:03:05Z
dc.identifier.doi https://doi.org/10.1039/C8SC04935A
dc.identifier.idgrec 131668
dc.identifier.idgrec 131668

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