Characterization of Inkjet-Printed Digital Microfluidics Devices

Chen, Shiyu; He, Zhidong; Choi, Suhwan; Novosselov, Igor

doi:10.3390/s21093064

Cited by 6 publications

(4 citation statements)

References 21 publications

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“…The device can process a unit droplet volume of 1.20 μL. Inkjet printing can be utilised to build digital microfluidic (DMF) circuits, making them less expensive than PCB-based designs and allowing for faster design iteration cycles 78 has demonstrated the fabrication of an inexpensive inkjet-printed digital microfluidic circuit without using a cleanroom. Hydrogen peroxide (H 2 O 2 ) is the final product for many of chemical reactions and hence detection of H 2 O 2 becomes necessary in bioanalytical chemistry.…”

Section: Microfluidic Devices Fabricated Through Inkjet Printing Tech...mentioning

confidence: 99%

Evolution of 3d printing technology in fabrication of microfluidic devices and biological applications: a comprehensive review

Saha,

Sarkar,

Choudhury

et al. 2024

Journal of Micromanufacturing

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Lab-on-a-chip or LOC is a term that is used to describe microfluidic devices that integrate multiple analyte detection, which are normally carried out in a laboratory, into one micro-chip unit and may have applications in diverse fields such as electronics, medicine and biomedical domains. Even though microfluidics has advanced greatly during the past decade due to increased needs for portability, reduced sample requirement and multiple analyte detection capabilities biological research has not adopted the technology at the required pace. This may be owing to the time-consuming and expensive process involved in the microfabrication of biochips, the requirement of specialised setup facilities and the extremely high cost associated with microfluidics as compared to conventional technologies. In recent years, three-dimensional (3D) printing has piqued curiosity in the scientific community. It has the potential to create complex, high-resolution structures and that too in a short timeframe depending upon device complexity. This could inspire progressive research in microfluidics, particularly finding applications in biomedical engineering and point-of-care diagnostics. This article gives an overview of how 3D printing aids in the manufacture of microfluidic devices for biological applications, as well as the existing 3D printing methods which are utilised for fabrication and the future perspective in the development of microfluidic devices.

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Section: Microfluidic Devices Fabricated Through Inkjet Printing Tech...mentioning

confidence: 99%

Evolution of 3d printing technology in fabrication of microfluidic devices and biological applications: a comprehensive review

Saha,

Sarkar,

Choudhury

et al. 2024

Journal of Micromanufacturing

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“…The glass/silicon-based digital microfluidics have high electrode patterns precision but are costly on materials and processing instruments. On the other hand, various low-cost approaches for digital microfluidics have also been invented, as follows: electrodes were fabricated on PCB (printed circuit board) [15]; screenprinting was used for the fabrication of carbon electrodes on thin polymer films or paper as substrate [16]; xurography or even hand-painting were also used for the low-cost digital microfluidic approach [17].…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Transparent and Flexible Digital Microfluidics Devices

Cai

Jiang

et al. 2022

Micromachines

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This study proposed a fabrication method for thin, film-based, transparent, and flexible digital microfluidic devices. A series of characterizations were also conducted with the fabricated digital microfluidic devices. For the device fabrication, the electrodes were patterned by laser ablation of 220 nm-thick indium tin oxide (ITO) layer on a 175 μm-thick polyethylene terephthalate (PET) substrate. The electrodes were insulated with a layer of 12 μm-thick polyethylene (PE) film as the dielectric layer, and finally, a surface treatment was conducted on PE film in order to enhance the hydrophobicity. The whole digital microfluidic device has a total thickness of less than 200 μm and is nearly transparent in the visible range. The droplet manipulation with the proposed digital microfluidic device was also achieved. In addition, a series of characterization studies were conducted as follows: the contact angles under different driving voltages, the leakage current density across the patterned electrodes, and the minimum driving voltage with different control algorithms and droplet volume were measured and discussed. The UV–VIS spectrum of the proposed digital microfluidic devices was also provided in order to verify the transparency of the fabricated device. Compared with conventional methods for the fabrication of digital microfluidic devices, which usually have opaque metal/carbon electrodes, the proposed transparent and flexible digital microfluidics could have significant advantages for the observation of the droplets on the digital microfluidic device, especially for colorimetric analysis using the digital microfluidic approach.

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“…The use of microfluidics in engineering, chemistry, and biology, including thermocapillary-based sensors and devices, has increased in recent years and has been summarized by Karbalaei et al [ 1 ]. A review of digital microfluidic devices was presented by Shiyu Chen et al [ 2 ]. Jasińska and Malecha described the proposed microfluidic modules with integrated microwave components [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Photothermocapillary Method for the Nondestructive Testing of Solid Materials and Thin Coatings

Zykov

Вавилов

Kuimova

2021

Sensors

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The photothermocapillary (PTC) effect is a deformation of the free surface of a thin liquid layer on a solid material that is caused by the dependence of the coefficient of surface tension on temperature. The PTC effect is highly sensitive to variations in the thermal conductivity of solids, and this is the basis for PTC techniques in the non-destructive testing of solid non-porous materials. These techniques analyze thermal conductivity and detect subsurface defects, evaluate the thickness of thin varnish-and-paint coatings (VPC), and detect air-filled voids between coatings and metal substrates. In this study, the PTC effect was excited by a “pumped” Helium-Neon laser, which provided the monochromatic light source that is required to produce optical interference patterns. The light of a small-diameter laser beam was reflected from a liquid surface, which was contoured by liquid capillary action and variations in the surface tension. A typical contour produces an interference pattern of concentric rings with a bright and wide outer ring. The minimal or maximal diameter of this pattern was designated as the PTC response. The PTC technique was evaluated to monitor the thickness of VPCs on thermally conductive solid materials. The same PTC technique has been used to measure the thickness of air-filled delaminations between a metal substrate and a coating.

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Characterization of Inkjet-Printed Digital Microfluidics Devices

Cited by 6 publications

References 21 publications

Evolution of 3d printing technology in fabrication of microfluidic devices and biological applications: a comprehensive review

Evolution of 3d printing technology in fabrication of microfluidic devices and biological applications: a comprehensive review

Fabrication of Transparent and Flexible Digital Microfluidics Devices

Photothermocapillary Method for the Nondestructive Testing of Solid Materials and Thin Coatings

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