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VERSION:2.0
PRODID:Icfo
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UID:6abfb6113b723
DTSTART:20261021T100000Z
SEQUENCE:0
TRANSP:OPAQUE
DTEND:20261021T110000Z
LOCATION:Seminar Room
SUMMARY:ICFO | JAVIER ARRÉS CHILLÓN
CLASS:PUBLIC
DESCRIPTION:Structuring materials at the micro- and nanoscale can strongly 
 modify their macroscopic properties. When characteristic dimensions become
  comparable to relevant physical length scales\, optical\, electrical\, ch
 emical and thermal responses can differ significantly from those of the co
 rresponding bulk materials. Controlling matter at these scales therefore p
 rovides a powerful route to engineer functional surfaces and materials\, b
 ut also requires fabrication processes capable of controlling dimensions\,
  morphology and interfaces at the nanometre scale.This seminar will focus 
 on a nanofabrication route based on ultra-thin metal films (UTMFs) and the
 ir transformation into nanostructured glass surfaces. The process starts w
 ith the deposition of continuous metallic films only a few nanometres thic
 k\, where film nucleation\, growth and the use of seed layers become parti
 cularly relevant. Rapid thermal processing (RTP) is then used to induce th
 e dewetting of the films and form randomly distributed metallic nanopartic
 les\, whose morphology can be tuned through the initial film and annealing
  conditions. Finally\, these nanoparticles are used as self-assembled mask
 s during reactive ion etching (RIE)\, transferring the nanoscale pattern i
 nto the underlying glass and producing surfaces covered by randomly distri
 buted nanopillars.The seminar will connect these three fabrication steps&m
 dash\;UTMF deposition\, thermal dewetting and dry etching&mdash\;to show h
 ow relatively simple thin-film processing can be used to progressively eng
 ineer material morphology across different length scales. Particular atten
 tion will be given to the fabrication parameters and practical considerati
 ons that determine the transition from a bare substrate to a functional na
 nostructured surface.
DTSTAMP:20261002T134801Z
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