University of Illinois Urbana-Champaign

Formation of three-dimensional graphene structures by controlled thermal activation of polymeric shape memory substrates

Wang, Cai Mike

Content Files
Cai Mike_Wang.pdf

Permalink

https://hdl.handle.net/2142/50419

Description

Title
Formation of three-dimensional graphene structures by controlled thermal activation of polymeric shape memory substrates
Author(s)
Wang, Cai Mike
Issue Date
2014-09-16
Director of Research (if dissertation) or Advisor (if thesis)
Nam, SungWoo
Department of Study
Mechanical Sci & Engineering
Discipline
Mechanical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Date of Ingest
2014-09-16T17:12:47Z
Keyword(s)
  • graphene
  • graphite
  • shape memory polymer
  • polystyrene
  • Shrinky-Dinks
  • graphene-polymer composites
  • strain engineering
  • 2D nano-materials
  • low dimensional nano-materials
  • atomic force microscopy (AFM)
  • Raman spectroscopy
  • surface enhanced Raman spectroscopy (SERS)
  • near-field scanning optical microscopy (NSOM)
  • plasmonics
  • graphene devices
  • flexible devices
  • bio-sensors
  • cell morphology
  • cell registry
  • Infrared (IR)
  • thermal treatment
  • chemical vapour deposition (CVD)
  • graphene synthesis
  • graphene transfer
  • crumples
  • corrugations
  • wrinkles
  • folds
  • buckles
  • ripples
  • surface relief grating
  • lithography-free patterning
  • soft materials
Abstract
This thesis details methodologies for a single-step approach to realise heterogeneous, three-dimensional (3D) texturing of graphene and graphite by using thermally-activated shape-memory polymers as the underlying substrate and the material characterizations thereof. Uniform, large area arrays of textured 3D graphene crumple features can be created on the centimeter scale by controlling simple processing parameters without compromising graphene’s superior mechanical, electrical, and optical properties. In addition, the capability to deterministically pattern graphene and graphite crumples in a spatially selective manner from otherwise flat graphene/graphite is achieved via infrared activation, which has not been previously possible with other methods such as relaxation of mechanically pre-strained elastomers, contraction of solvent swollen hydrogels, or thermal expansion mismatch between the surface film and substrate. The proposed methods will enable facile large-scale topographical and strain engineering of not only graphene and graphite but also other low-dimensional, thin-film and 2D materials such as transitional metal dichalcogenides and furthermore provide a pathway to realizing 3D all carbon-based devices and sensors.
Graduation Semester
2014-08
Permalink
http://hdl.handle.net/2142/50419
Copyright and License Information
Copyright 2014 Cai Mike Wang

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