BCMaterials Fortnightly Seminars #26

"Block copolymers self-assembling nano-patterning of FePt"

EDUARDO FERNANDEZ

(BCMaterials)

Arrays of metal nanostructures with dimensions of a few nm, produced from thin films, are essential components of electronic, photonic, optoelectronic, and magnetic devices. The main objective of this research is to use self-assembly block copolymers as masks to pattern this structures. The block copolymer (BCP) that we use is PS-b-PDMS with a fr =30% and a molecular weight of 53k g/mol. In our case we are going to pattern FePt using this BCP, to obtain lines and dots of 20 nm and measure its magnetic properties.

"SCF DESIGN AND SYNTHESIS"

LAURA BRAVO

(UPV/EHU)

Materials consisting of metal ions or clusters that are linked by polyfunctional organic ligands, form networks of different dimensionalities. Their structural features, including large cavities and high surface areas, have opened a wide range of applications in fields like gas storage and separation, drug delivery, chemical sensing, heterogeneous catalysis, biomedical imaging and others referred to their host-guest chemistry like water sorption for heat transformation. In this sense, the use of dipyridyl ligands is an effective strategy to produce extended structures.

However, this strategy not always results in 3D networks, as occurred in the case herein presented. Novel compounds,

Cu((py)2C(OH)2)2](H2bta) (1), and [Cu((py)2C(OH)2)2](fum) (2) [Cu3((py)2C(OH)2)4]•6H2O (3), have been synthesized where (py)2C(OH)2 is the gem-diol of di-2-pyridyl ketone ((py) CO). The dehydrated phases of compounds 1 and 3 have been obtained after a heating treatment. The crystal structures, thermal and magnetic properties have been measured, by means of X-ray thermogravimetry (TG), X-ray thermodiffractometry (TDX), and electron paramagnetic resonance (EPR).