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SUMMARY:Electrically controlled nano and micro actuation in a memristive s
 witching device with on-chip gas encapsulation - Mr. Hippolyte P.A.G. Asti
 er\,  Cavendish Laboratory\, University of Cambridge. 
DTSTART:20180117T141500Z
DTEND:20180117T151500Z
UID:TALK98968@talks.cam.ac.uk
CONTACT:Dr Kaveh Delfanazari
DESCRIPTION:Powerful nanoactuators are a key component for developing nano
 machinery. In this talk\, I will present a device with electrically-driven
  actuation ranging from the nanometre to the micrometre scale with added o
 ptical readout. We sandwich electrolyte films of 10nm-thick Al2O3 deposite
 d by atomic layer deposition (ALD)\, between graphene and Au electrodes to
  obtain reversible room-temperature solid-state redox producing Al metal a
 nd O2 gas in a memristive-type switching device1. The resulting high-press
 ure oxygen micro-fuel reservoirs are encapsulated under the stretchable gr
 aphene\, swelling to heights of up to 1µm\, which can be dynamically trac
 ked by plasmonic rulers in a nanoparticle-on-mirror arrangement2. Unlike i
 n standard memristors where the memristive redox reaction occurs in single
  or few conductive filaments3\, the mechanical deformation forces the cons
 tant creation of new filaments over the whole area of the inflated film. T
 he resulting on-off resistance ratios are exceptionally high\, reaching 10
 8 in some cycles. The synchronisation of nanoactuation and memristive swit
 ching in these devices is compatible with large-scale fabrication and has 
 potential for precise and electrically monitored actuation technology. A r
 ange of experiments was conducted to characterise the effect topographical
 ly and electrically as will be explained in the talk. \n 
LOCATION:Mott Seminar Room (Mott Building Room 531)\, Cavendish Laboratory
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