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MAIN CLASSES OF MATERIALS STUDIED

MOLECULAR MATERIALS
OBJECTIVE MANAGER:
Dulce Belo
MACROMOLECULAR MATERIALS
OBJECTIVE MANAGER:
Helena Casimiro
INTERMETALLICS, CERAMICS, 
OXIDES and RELATED 
MATERIALS
OBJECTIVE MANAGER:
Ana Ferreira

ACTIVITIES 2016

A significant part of the activities was devoted to the maintenance and development of infrastructures and research tools run by C2TN researchers, rare or even unique at national level, which have been placed open at the benefit of a large external community through an extensive network of scientific collaborations. These facilities include materials modification by ion implantation, neutrons, gamma and electron irradiation, neutron tomography, several ion beam techniques for elemental composition analysis and the low temperatures and high magnetic field facilities for the study of electrical transport, magnetic properties of materials and Mössbauer spectroscopy.

OUTPUT 2016

67 papers in peer-reviewed journals, 
4 book chapters, 
20 proceedings, 
3 PhD, 2 MSc and 2  graduated completed theses, and 1 patent. 


The team has participated in the organization of 2 conferences and 1 workshops and several national training courses. A significant participation in the scientific and technical activities of European Union Technology Platforms and Networks, namely COST ACTIONS CA15128 CM1105, TD1004 has also taken place. During 2016 the team has also prepared and submitted several common projects under calls from EC, FCT, CERN-FCT, and Horizon 2020. So far, one contract was established with an international company and another with a national company will start in 2017.

RESEARCH HIGHLIGHTS

The research groups (ES, ETN, QEf, and REI) contributed to the research output as more detailed described in their reports. 


The following major achievements in 2016 are highlighted.

SUPERCONDUCTIVITY IN BILAYER MOLECULAR METALS (CNB-EDT-TTF)4


A novel type of bilayer conductors, displaying unique properties derived from closely interacting conducting molecular layer pairs have been recently obtained in C2TN as salts of a novel organic electron donor CNB-EDT-TTF. One of the polymorphs of the triiodide salts, κ-(CNB-EDT-TTF)4I3 is a two-dimensional metal showing superconductivity below 3.5 K

SPALLATION TARGETS


The production of radioactive atoms using cyclotrons in which high energy protons hits a target, calls for new type of targets with high release performance at high temperatures. The electrospinning method was successfully applied to the  producing new, UCx spallation targets nanostructured as microfibers, capable to stand high temperatures with high release performance.

PROOF OF AMPHOTERIC Mg-DOPANT IN GaN

GaN is a technologically important wide band-gap semiconductor, with properties that can be engineered by dopping. The emission channeling technique with short-lived isotopes (EC-SLI) gives direct information on dopant atoms location and 27Mg (t1/2=9.5 min) implanted samples were studied to clarify the location of dopping atoms. Mg was found to occupy either substitutional Ga sites, or below 350°C, interstitial positions ~0.6 Å away from ideal interstitial octahedral sites, allowing the first-direct evidence for the amphoteric character of Mg in GaN.