2D optical gratings based on hexagonal voids on transparent elastomeric substrate
2D optical gratings based on hexagonal voids on transparent elastomeric substrate
A chromatic vectorial strain sensor constituted by hexagonal voids on transparent elastomeric substrate has been successfully fabricated via soft colloidal lithography. Initially a highly ordered 1.6 microns polystyrene spheres monolayer colloidal crystal has been realized by wedge-shaped cell method and used as a suitable mold to replicate the periodic structure on a polydimethylsiloxane sheet. The replicated 2D array is characterized by high periodicity and regularity over a large area, as evidenced by morphological and optical properties obtained by means of SEM, absorption and reflectance spectroscopy. In particular, the optical features of the nanostructured elastomer have been investigated in respect to uniaxial deformation up to 10% of its initial length, demonstrating a linear, tunable and reversible response, with a sensitivity of 4.5 ± 0.1 nm/%. Finally, it has been demonstrated that the specific geometrical configuration allows determining simultaneously the vectorial strain-stress information in the x and y directions.
micro/nano patterning, 2D colloidal crystal, soft colloidal lithography, strain microsensor, vectorial strain gauge
Piccolo, Valentina
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Chiappini, Andrea
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Armellini, Cristina
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Barozzi, Mario
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Lukowiak, Anna
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Sazio, Pier-John A.
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Vaccari, Alessandro
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Ferrari, Maurizio
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Zonta, Daniele
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Piccolo, Valentina
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Chiappini, Andrea
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Armellini, Cristina
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Barozzi, Mario
a3349b0c-565d-4272-ac5e-ef5a31096167
Lukowiak, Anna
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Sazio, Pier-John A.
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Vaccari, Alessandro
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Ferrari, Maurizio
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Zonta, Daniele
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Piccolo, Valentina, Chiappini, Andrea, Armellini, Cristina, Barozzi, Mario, Lukowiak, Anna, Sazio, Pier-John A., Vaccari, Alessandro, Ferrari, Maurizio and Zonta, Daniele
(2018)
2D optical gratings based on hexagonal voids on transparent elastomeric substrate.
Micromachines, 9 (7), [345].
(doi:10.3390/mi9070345).
Abstract
A chromatic vectorial strain sensor constituted by hexagonal voids on transparent elastomeric substrate has been successfully fabricated via soft colloidal lithography. Initially a highly ordered 1.6 microns polystyrene spheres monolayer colloidal crystal has been realized by wedge-shaped cell method and used as a suitable mold to replicate the periodic structure on a polydimethylsiloxane sheet. The replicated 2D array is characterized by high periodicity and regularity over a large area, as evidenced by morphological and optical properties obtained by means of SEM, absorption and reflectance spectroscopy. In particular, the optical features of the nanostructured elastomer have been investigated in respect to uniaxial deformation up to 10% of its initial length, demonstrating a linear, tunable and reversible response, with a sensitivity of 4.5 ± 0.1 nm/%. Finally, it has been demonstrated that the specific geometrical configuration allows determining simultaneously the vectorial strain-stress information in the x and y directions.
Text
micromachines-09-00345
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More information
Accepted/In Press date: 9 July 2018
e-pub ahead of print date: 10 July 2018
Keywords:
micro/nano patterning, 2D colloidal crystal, soft colloidal lithography, strain microsensor, vectorial strain gauge
Identifiers
Local EPrints ID: 429359
URI: http://eprints.soton.ac.uk/id/eprint/429359
ISSN: 2072-666X
PURE UUID: d5ff2547-14ea-4355-8e41-24a046d91ec4
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Date deposited: 26 Mar 2019 17:30
Last modified: 16 Mar 2024 03:27
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Contributors
Author:
Valentina Piccolo
Author:
Andrea Chiappini
Author:
Cristina Armellini
Author:
Mario Barozzi
Author:
Anna Lukowiak
Author:
Alessandro Vaccari
Author:
Maurizio Ferrari
Author:
Daniele Zonta
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