News

March 2nd 2015: The Positron Group has published (PNAS magazine) an advanced study on amorphous indium-gallium-zinc-oxide (IGZO) semiconductors in collaboration with the Group of Tobin Marks and Antonio Facchetti of the Northwestern University. In this work is demonstrated that the new coating technique, spray-combustion synthesis (SCS), produce IGZO films at low temperatures and for short times compared to the sputtering conventional technique. The properties of the IGZO films made by SCS, as thickness, densification, nanoporosity, electron mobility, trap densities and bias stress stability, are at the same level of the sputtered films. It also determines the conditions of density and porosity that allow films with a good performance.

Thin film transistors (TFT) IGZO has 50x higher electron mobility than amorphous silicon, which has often been used in displays (for smartphones, tablets, PCs, TVs, etc.). As a result, IGZO-TFT can improve the speed, resolution and size of flat-panel displays. It is thus considered to be one of the most promising TFT for use in organic light-emitting diode (OLED) displays.

28.07.14: The AEgIS collaboration at CERN has demonstrated a method to measure a very small deflection of an antimatter beam (smaller than the thickness of a human hair). The method has been tested by measuring the deviation of an antiproton beam (Nature Communications). The deviation is a consequence of a force (magnetic origin) of 500 attonewton (5x10-16 N) applied to the antiproton beam. The proposed instrument is a "moiré deflectometer". In future experiments, this method will be employed to measure the effect of Earth's gravity on antihydrogen, a force that is much smaller that the electromagnetic force measured here.

Graphical abstract: Mesoporous materials for antihydrogen production

12.05.13: Antimateria Oridine  (Italian)

07.05.13: The Positron Group has published an advanced review on Meoporous Materials for antihydrogen production.  Chemical Society Reviews  Polimi

Hydrophobic mesoporous silica with open pores such as MCM-41 and aerogel show remarkable features for antihydrogen formation at low temperature.

25.04.13: Materiali porosi a Como; link La Provincia (Italian)

01.10.12: The Positron Group has published an advanced study on Hybrid Solar Cells in collaboration with the IIT (Italian Institute of Technology). Hybrid solar cells are a combination of organic and inorganic materials. This new generation of thin-film is based on a very favourable price/performance ratio and the possibility to manufacture flexible and large-area devices. Positron Annihilation Spectroscopy using a variable-energy positron beam has been employed for the first time in this field in order to obtain depth-resolved data to study the infiltration of a conductive polymer (P3HT) into a mesoporous skeleton of titania. It has been possible to understand the reason of the improvement the device performance by engineering the hybrid interface using an inexpensive and transparent interlayer (4-mercaptopyridine).

17.04.12: L-NESS presentation Franco Ciccacci (Italian: video)

16.03.12: The SiGe epitaxy group of L-NESS have made a Sience work on "Scaling Hetero-Epitaxy from Layers to Three-Dimensional Crystals" in collaboration with the ETH Zürich and Università di Milano-Bicocca. A photography of this work was selected for cover of Science.

15.10.11: Antimateria per studiare la materia  Unico-Lab  (Italian)

14.04.11: The Postron Annihilation Spectroscopy group featured in Così faremo volare davvero la nave di Star Trek da Como (video)  La Provincia  (Italian)

10.12.10: New Tandil link1, Tandil Diario   link 2  ABC Hoy  (Spanish)

29.11.10: Popurrí Tandil Eco de Tandil  (Spanish)

19.11.10: Acumulación de antimateria     RF  Rio Negro (Spanish)


posted Oct 14, 2009, 11:16 PM by Rafael Ferragut   [ updated Mar 18, 2012, 2:07 PM ]


posted Oct 14, 2009, 11:11 PM by Rafael Ferragut   [ updated Mar 18, 2012, 2:05 PM ]


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