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SUMMARY:Kirigami Engineering—Nanoscale Structures Exhibiting a Range of 
 Controllable 3D Configurations  - Dr Lior Medina (Department of Engineerin
 g\, University of Cambridge)
DTSTART:20210314T104000Z
DTEND:20210314T110500Z
UID:TALK158125@talks.cam.ac.uk
CONTACT:Miroslava Novoveska
DESCRIPTION:YouTube link: https://youtu.be/cfcSFJg4ANc\n\nRegistration for
 m to attend Q&A session on Zoom: https://forms.gle/tTRQreym7s6pR2rW6\n\nKi
 rigami structures provide a promising approach to transform flat films int
 o 3D complex structures that are difficult to achieve by conventional fabr
 ication approaches. By designing the cutting geometry\, it is shown that d
 istinct buckling-induced out-of-plane configurations can be obtained\, sep
 arated by a sharp transition characterised by a critical geometric dimensi
 on of the structures. In situ electron microscopy experiments reveal the e
 ffect of the ratio between the in-plane cut size and film thickness on out
 -of-plane configurations. Moreover\, geometrically nonlinear finite elemen
 t analyses (FEA) accurately predict the out-of-plane modes measured experi
 mentally\, their transition as a function of cut geometry\, and provide th
 e stress–strain response of the kirigami structures. The combined comput
 ational–experimental approach and results reported here represent a step
  forward in the characterisation of thin films experiencing buckling-induc
 ed out-of-plane shape transformations and provide a path to control 3D con
 figurations of micro- and nanoscale buckling-induced kirigami structures. 
 The out-of-plane configurations promise great utility in the creation of m
 icro- and nanoscale systems that can harness such structural behaviour\, f
 rom optical scanning micromirrors\, to novel actuators\, and nanorobotics.
LOCATION:Online
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