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Langmuir. 2011 Apr 5;27(7):4076-81. doi: 10.1021/la104901m. Epub 2011 Mar 2.

Thin deposits and patterning of room-temperature-switchable one-dimensional spin-crossover compounds.

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1
Institute for Nanostructured Materials (ISMN), CNR, Bologna, Italy. m.cavallini@bo.ismn.cnr.it

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.

PMID:
21366277
DOI:
10.1021/la104901m
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