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Cari colleghi,
siete tutti invitati al seminario del dott. Enzo Rotunno, che si terrà in aula Campisano,  IMM-sede, zona industriale strada VIII N.5,  giorno 03 Novembre (venerdì) alle ore 11.

Enzo, dopo una lunga esperienza  presso il CNR-IMEM di Parma, passando anche dall’Oak Ridge Laboratory (USA) guidato dal prof. S.Pennycook,  da qualche settimana si è trasferito presso il gruppo di microscopia elettronica di IMM sede, dove svolgerà attività di ricerca  grazie ad un’iniziativa congiunta fra IMM, NFFA e DSFTM.

In allegato un breve abstract della presentazione:

Cordiali saluti
Giuseppe Nicotra

Advanced methods for transmission electron microscopy

As nanotechnology and related areas monopolize the scientific community’s interest, the Transmission Electron Microscopy (TEM) is becoming a central tool for the complete characterization of nanoscale materials and devices, as it can offer a broad range of characterization techniques with then highest spatial and analytical resolution, coupled with a completely quantitative understanding of the various techniques.

The past decade has seen a huge development of instrumental possibilities and the new aberration corrected microscopes routinely reach sub-Å resolution in both TEM and STEM operation mode. The large amount of new information that these instruments are making available has raised the problem of more adequate analysis tools.

The formulation of the Bloch wave theory and of the multislice algorithm has been a fundamental milestone in image simulation. These two approaches have been applied to solve the dynamic interaction and simulate High Resolution TEM and STEM images, diffraction contrast and convergent beam diffraction patterns.

Hence, new methodologies based on the comparison of experimental images and accurate simulations have been developed and are able to offer a complete structural and chemical characterization of materials.

During the talk I will discuss some examples of the application of these innovative methodologies. All the applications I will discuss come from my own works on phase change chalcogenide nanowires and InGaN/GaN quantum wells.