Restriction lift date: 2024-09-30
Laser fabrication of porous, 3D graphene-like carbon from polyimide and sustainable bioplastics
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Date
2022-06
Authors
Larrigy, Cathal
Journal Title
Journal ISSN
Volume Title
Publisher
University College Cork
Published Version
Abstract
Laser-induced graphitization (LIG) of materials provides a unique and advantageous
method for fabrication of 3D, porous, conductive, carbon structures with high surface
area. By using laser-irradiation of target substrates, conductive patterns such as
electrochemical or chemiresistive sensing elements can be fabricated additively, thus
reducing both the energy footprint and cost. However, typically LIG is fabricated on
non-sustainable feedstock substrates, most commonly polyimide. Studies toward using
alternative and more sustainable substrates have been researched, and in this thesis one
such alternative is explored, chitosan-based laser-induced graphene.
This thesis aims to show the possibilities of laser-induced graphene fabrication, in
examining first the fabrication of LIG on polyimide using a low-cost hobbyist 405 nm
laser engraving machine, as an alternative low energy intensive fabrication method.
Following this the possibility of using a more sustainable substrate as a target precursor
for laser-induced graphitization in the form of a chitosan-based LIG. Finally, a
potential application using chitosan-based LIG was demonstrated in the form of
chemi-resistive 2-terminal impedance devices for sensing humidity and volatile
organic compounds.
Description
Keywords
Laser-induced graphitization , Chitosan , Porous 3D graphene , Sustainable bioplastics , Electrochemical sensing , Volatile organic compound sensing
Citation
Larrigy, C. 2022. Laser fabrication of porous, 3D graphene-like carbon from polyimide and sustainable bioplastics. PhD Thesis, University College Cork.