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Pàgina inicial > Articles > Articles publicats > Integrated 3D hydrogel waveguide out-coupler by step-and-repeat thermal nanoimprint lithography : |
Data: | 2018 |
Resum: | Hydrogel materials offer many advantages for chemical and biological sensoring due to their response to a small change in their environment with a related change in volume. Several designs have been outlined in the literature in the specific field of hydrogel-based optical sensors, reporting a large number of steps for their fabrication. In this work we present a three-dimensional, hydrogel-based sensor the structure of which is fabricated in a single step using thermal nanoimprint lithography. The sensor is based on a waveguide with a grating readout section. A specific hydrogel formulation, based on a combination of PEGDMA (Poly(Ethylene Glycol DiMethAcrylate)), NIPAAm (N-IsoPropylAcrylAmide), and AA (Acrylic Acid), was developed. This stimulus-responsive hydrogel is sensitive to pH and to water. Moreover, the hydrogel has been modified to be suitable for fabrication by thermal nanoimprint lithography. Once stimulated, the hydrogel-based sensor changes its topography, which is characterised physically by AFM and SEM, and optically using a specific optical set-up. |
Ajuts: | European Commission 214249 Ministerio de Economía y Competitividad FIS2015-70862-P Ministerio de Economía y Competitividad SEV-2013-0295 |
Drets: | Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original. |
Llengua: | Anglès |
Document: | Article ; recerca ; Versió publicada |
Matèria: | Hydrogel ; Waveguide ; Thermal nanoimprint lithography ; Water sensor ; PH sensor |
Publicat a: | Sensors (Basel, Switzerland), Vol. 18, Issue 10 (October 2018) , art. 3240, ISSN 1424-8220 |
12 p, 3.6 MB |