Prima-Garcia et al. Nanoscale Research Letters 2012, 7:232 http://www.nanoscalereslett.com/content/7/1/232 electrodeposition time to few seconds. Thus, the morph- ology of the films of PBA is also modified varying the thickness of the film by a change in the average grain size. These thinner films possess a smoother surface con- sisting in homogeneous particles of smaller size. Interest- ingly, as the thickness of the film is reduced, its magnetic properties are considerably improved (higher coercivity and squareness of the hysteresis loops) until a limit is reached beneath this limit; the coercivity is reduced surely until the superparamagnetic limit. Consequently, the utility of electrochemical methods has been also demonstrated in order to obtain in a sim- ple, fast, and reproducible way high-quality thin films of PBA which are molecule-based magnets with very inter- esting magnetic properties and possible applications in molecular spintronic. In view of the versatility of these materials, which in- clude the easy tuning of the magnetic (nature of the magnetic ordering, anisotropy, coercivity, and critical temperature) and electronic (redox potential, energy gap) properties by simply varying the nature of the metal cen- ters, future work will focus on the fabrication and MOKE characterization of PBA-based magnetic multi- layers to study proximity effects as well as on the use of these films as spin injector of all-molecular spin valves. Competing interests The authors declare that they have no competing interests. Acknowledgments Financial support from the European Union (Projects HINTS FP7-263104-2 and SpinMol Advanced Grant ERC-2009-AdG-20090325), the Secretaria de Estado de Investigación, Desarrollo e Innovación (Projects with FEDER cofinancing MAT2007-61584, Consolider-Ingenio in Molecular Nanoscience CSD2007-00010, and MATMOLSPIN, MAT201122785), and Generalitat Valenciana (PROMETEO program) is gratefully acknowledged. 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