Thin deposits and patterning of room-temperature-switchable one-dimensional spin-crossover compounds |
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Authors: | Cavallini Massimiliano Bergenti Ilaria Milita Silvia Kengne Jean Crispin Gentili Denis Ruani Giampiero Salitros Ivan Meded Velimir Ruben Mario |
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Affiliation: | Institute for Nanostructured Materials (ISMN), CNR, Bologna, Italy. m.cavallini@bo.ismn.cnr.it |
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Abstract: | We present a study on thin deposits and patterning of 1-D spin-crossover compounds Fe(II)-(L)(2)H](ClO(4))(3)·MeOH [L = 4'-(4'-pyridyl)-1,2':6'1'-bis- (pyrazolyl) pyridine] (1) that exhibit a reversible, thermally driven spin transition at room temperature. Micrometric rodlike crystals of 1 on silicon surfaces are achieved by drop casting and solvent annealing. We observed that the crystallinity of thin deposits and spin-transition properties critically depends on the deposition procedure. Furthermore, we proved processability and patterning using unconventional wet lithography that reduces the crystallite formation time by 1 order of magnitude. Thin deposits of 1 were characterized by atomic force microscopy, polarized optical microscopy and X-rays, and the switching properties were characterized by Raman spectroscopy. |
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