(AGENPARL) – VENEZIA lun 12 giugno 2023 Speaker: Prof. Raymond Phaneuf, Department of Materials Science and Engineering University of Maryland

The talk will be available via Zoom: 
https://unive.zoom.us/j/?pwd=Y3ZXVGI0ZmMzQWorUm9Ta0s5MGhNQT09
Meeting ID: 838 7549 8480
Passcode: 6gwwq0

Abstract:
Silicate glass is surprisingly susceptible to degradation when in contact with water – leading to a phenomenon known as “glass disease”. In this talk, I’ll discuss our recent work employing atomic layer deposition (ALD) of amorphous aluminium oxide to avoid contact of glass objects with water. The films are optically transparent and dramatically reduce the leaching of modifier ions from the glass when immersed in water. I’ll also discuss how extended defects limit the performance of these films and how surface pretreatment might be used to slow glass corrosion to a rate limited by diffusion through the films.

Bio Sketch:
Ray Phaneuf is a Professor and Past Interim Chair in the Materials Science and Engineering Department at the University of Maryland. He joined the University of Maryland in 1985, where he used electron diffraction to study phase transformations on stepped Si111 surfaces, resulting in the identification of a thermodynamically driven faceting associated with the formation of the 7×7 reconstruction. In 1989 he visited with Ernst Bauers group in Clausthal, Germany, using low energy electron microscopy LEEM to image this faceting in real-time. In 2000 he joined the Materials Science and Engineering Department, and began studies of directed self organization during growth and sublimation on semiconductor surfaces, using lithographic patterning. In 2006 he was a visiting professor at the National Nanotechnology Laboratory, in Lecce, Italy. He is the author of more than 100 papers and has given over 40 invited talks on his work in the US, Europe and Japan. He was named the Laboratory for Physical Sciences Faculty Researcher of the year in 2002. In addition to MSE, he has affiliate positions in Physics and ECE, and was a founding member of the UMMRSEC at the University of Maryland. He was the founding Coordinator of the Interdisciplinary Minor Program in Nanoscience and Technology. His current research is in the fields of directing self-assembly of nanostructures at the mesoscale, plasmonics, and application of nanotechnology to the conservation of cultural heritage objects. Present Position Professor, Department of Materials Science and Engineering ,Affiliate Professor, Department of Physics, and Department of Electrical and Computer Engineering University of Maryland, College Park, MD 20742

Fonte/Source: http://www.unive.it/data/agenda/1/75849