3D-Printed E-Band Gradient Dielectric Lens for Automotive and Industrial Applications

Lambert, Philip M.; Polidore, Trevor

doi:10.1109/ap-s/usnc-ursi47032.2022.9886088

Cited by 6 publications

(1 citation statement)

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“…Although the performance of 3D-printed MMDs is currently constrained by the low resolution of fused filament 3D-printers used here, more accurate and high-resolution 3D-printing platforms, along with more bespoke dielectric materials for microwave and high frequency engineering, are possible 50,51 . The methodology shown here can be significantly improved with these advanced tools to produce customised MMDs and other microelectrode-embedded microfluidic devices featuring complex microstructures.…”

Section: Discussionmentioning

confidence: 99%

3D-printing fabrication of microwave-microfluidic device for droplets network formation and characterisation

Silver,

Li,

Dimitriou

et al. 2024

Preprint

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Microwave-microfluidic devices (MMDs) have emerged as precision tools for the rapid, accurate, sensitive, and non-invasive characterisation of low-volume liquids. However, the fabrication of MMDs remains a significant challenge due to the complexities associated with integrating fluidic ducts and electronic components. Herein, we present a versatile and economical 3D-printing approach for MMD fabrication, using liquid metal as an electrical conductor. Cyclic olefin copolymer, polylactic acid and polypropylene were identified as potential printable dielectric materials for MMD fabrication. 3D-printed cyclic olefin copolymer substrates exhibited the lowest loss tangent of 0.002 at 2.7GHz, making it an ideal material for high frequency engineering. Liquid metal, specifically gallium indium eutectic, was injected into the printed ducts to form conductive microwave structures. Exemplar MMDs were fabricated to integrate split-ring type microwave resonators and droplet-forming fluidic junctions. These devices were applied in the formation and characterisation of water-in-oil emulsions for constructing definable lipid-segregated droplet interface bilayer (DIB) networks. This work not only indicates the feasibility of using 3D-printing for rapid prototyping of customised MMDs but also demonstrates the potential of MMDs as a new research tool for biochemistry and synthetic biology.

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Section: Discussionmentioning

confidence: 99%

3D-printing fabrication of microwave-microfluidic device for droplets network formation and characterisation

Silver,

Li,

Dimitriou

et al. 2024

Preprint

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show abstract

Deconvolution volumetric additive manufacturing

Orth,

Webber,

Zhang

et al. 2023

Nat Commun

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Volumetric additive manufacturing techniques are a promising pathway to ultra-rapid light-based 3D fabrication. Their widespread adoption, however, demands significant improvement in print fidelity. Currently, volumetric additive manufacturing prints suffer from systematic undercuring of fine features, making it impossible to print objects containing a wide range of feature sizes, precluding effective adoption in many applications. Here, we uncover the reason for this limitation: light dose spread in the resin due to chemical diffusion and optical blurring, which becomes significant for features ⪅0.5 mm. We develop a model that quantitatively predicts the variation of print time with feature size and demonstrate a deconvolution method to correct for this error. This enables prints previously beyond the capabilities of volumetric additive manufacturing, such as a complex gyroid structure with variable thickness and a fine-toothed gear. These results position volumetric additive manufacturing as a mature 3D printing method, all but eliminating the gap to industry-standard print fidelity.

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3D-printed microfluidic–microwave device for droplet network formation and characterisation

Silver,

Li,

Porch

et al. 2024

Lab Chip

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3D-Printed E-Band Gradient Dielectric Lens for Automotive and Industrial Applications

Cited by 6 publications

References 0 publications

3D-printing fabrication of microwave-microfluidic device for droplets network formation and characterisation

3D-printing fabrication of microwave-microfluidic device for droplets network formation and characterisation

Deconvolution volumetric additive manufacturing

3D-printed microfluidic–microwave device for droplet network formation and characterisation

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