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SUMMARY:PicoPerfect Scanner Enables Rapid Error-Free Printing of Atomic Qu
 antum Devices
DTSTART:20260925T151500
DTSTAMP:20260925T095755Z
UID:a3c8a9f1eaa513286aea1c97e13628358af58670c6c64de6941a75f0
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Robert Wolkow\nUniversity of Alberta\, Edmonton\, Canada
 \nAbstract:  \nThe majority of atom-defined structures built to date hav
 e been held together by extremely weak dispersion interactions and are the
 refore unstable at room temperature. Moreover\, most such assemblies have 
 been fabricated on metal substrates that mask any interesting/useful elect
 ronic properties of atomic (or molecular) assemblies. Patterned atomic dan
 gling bonds on an otherwise Hydrogen-terminated silicon surface are robust
  and unchanging to over 200 C and offer useful electronic properties. This
  area was pioneered by Joseph Lyding >2 decades ago. Over the last 20 year
 s we have doggedly pursued and overcome fabrication and measurement issues
  related to dangling bonds and as well have advanced understanding of dang
 ling bond assemblies. \nIn this talk I will demonstrate the near perfect 
 properties of a new scanning probe actuator. Unlike all other scanners thi
 s device exhibits no discernible creep or hysteresis\, allowing a probe to
  be rapidly positioned\, independent of previous movement history\, with 1
  picometer uncertainty. This creep-free scanner allows ~10\,000x speed up 
 in fabrication rate because the time required for the tip to settle into p
 osition has been reduced from hundreds of seconds to just milliseconds. \
 nI plan to take you on a walk through our “hardware store” to show you
  the singular tools\, techniques and devices we have at hand. We will go w
 ell beyond familiar “hydrogen lithography” for spatially defined attac
 hment to explore complex many electron proto devices such as error-free at
 om defined wires\, diverse gates and the first atomic integrated circuit [
 1\, 2]. Crucially\, any number of truly identical copies of these entities
  can be made.\n 
LOCATION:PH L1 503 https://plan.epfl.ch/?room==PH%20L1%20503 https://epfl.
 zoom.us/j/69823646374?pwd=mYUfXk7hNOyXYh238nfzg8CTbqjaQO.1
STATUS:CONFIRMED
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