A screen-printed flexible flow sensor

Moschos, Anastasios; Syrový, Tomáš; Syrová, Lucie; Kaltsas, G.

doi:10.1088/1361-6501/aa5fa0

Cited by 10 publications

(7 citation statements)

References 34 publications

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“…The definition of TCR is the resistance change factor per degree celsius of temperature change. Though other printing techniques such as stencil [287] and transfer [288] have been reported, screen printing is most widely used to fabricate temperature sensors on various substrates such as PEN, [289] PET, [165,281,[289][290][291][292][293] PI, [283] PI-PET [294] and PDMS. Table 6.…”

Section: Printed Textile Temperature Sensorsmentioning

confidence: 99%

Advances in Printed Electronic Textiles

Islam,

Afroj,

Yin

et al. 2023

Advanced Science

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Electronic textiles (e‐textiles) have emerged as a revolutionary solution for personalized healthcare, enabling the continuous collection and communication of diverse physiological parameters when seamlessly integrated with the human body. Among various methods employed to create wearable e‐textiles, printing offers unparalleled flexibility and comfort, seamlessly integrating wearables into garments. This has spurred growing research interest in printed e‐textiles, due to their vast design versatility, material options, fabrication techniques, and wide‐ranging applications. Here, a comprehensive overview of the crucial considerations in fabricating printed e‐textiles is provided, encompassing the selection of conductive materials and substrates, as well as the essential pre‐ and post‐treatments involved. Furthermore, the diverse printing techniques and the specific requirements are discussed, highlighting the advantages and limitations of each method. Additionally, the multitude of wearable applications made possible by printed e‐textiles is explored, such as their integration as various sensors, supercapacitors, and heated garments. Finally, a forward‐looking perspective is provided, discussing future prospects and emerging trends in the realm of printed wearable e‐textiles. As advancements in materials science, printing technologies, and design innovation continue to unfold, the transformative potential of printed e‐textiles in healthcare and beyond is poised to revolutionize the way wearable technology interacts and benefits.

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Section: Printed Textile Temperature Sensorsmentioning

confidence: 99%

Advances in Printed Electronic Textiles

Islam,

Afroj,

Yin

et al. 2023

Advanced Science

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“…One of the main application of screen printing is the deposition of electrodes for electrochemical sensing [28]. Recently the technique has been used for wearable sensors [29] and photovoltaic [30] applications as well as for flow sensing where inks are used as heating and sensing elements [31].…”

Section: Screen Printingmentioning

confidence: 99%

Low-Cost Microfabrication Tool Box

et al. 2020

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Microsystems are key enabling technologies, with applications found in almost every industrial field, including in vitro diagnostic, energy harvesting, automotive, telecommunication, drug screening, etc. Microsystems, such as microsensors and actuators, are typically made up of components below 1000 microns in size that can be manufactured at low unit cost through mass-production. Yet, their development for commercial or educational purposes has typically been limited to specialized laboratories in upper-income countries due to the initial investment costs associated with the microfabrication equipment and processes. However, recent technological advances have enabled the development of low-cost microfabrication tools. In this paper, we describe a range of low-cost approaches and equipment (below £1000), developed or adapted and implemented in our laboratories. We describe processes including photolithography, micromilling, 3D printing, xurography and screen-printing used for the microfabrication of structural and functional materials. The processes that can be used to shape a range of materials with sub-millimetre feature sizes are demonstrated here in the context of lab-on-chips, but they can be adapted for other applications. We anticipate that this paper, which will enable researchers to build a low-cost microfabrication toolbox in a wide range of settings, will spark a new interest in microsystems.

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“…Thermistor fabrication was covered in previously published work [35]. The sensor was fabricated by screen printing technology by using an EKRA E1 printing machine.…”

Section: Sensor Fabrication-principle Of Operationmentioning

confidence: 99%

“…Electrical characterization measurements are followed by evaluation of the device for determining flow vector: both air flow velocity and direction of flow. The conceptualization of the devices follow our previous work, where a two-dimensional thermal flow sensors was developed on flexible substrate with discrete SMT components [35]; by transferring the technology and utilizing a fully printed device, the aforementioned major advantages over conventional manufacturing processes can be leveraged at a negligible performance cost. Results indicate that the flexible sensor can be easily adopted to applications which require multidirectional flow detection, given the fact that repeatability and results stability is obtained.…”

Section: Introductionmentioning

confidence: 99%

A fully printed flexible multidirectional thermal flow sensor

Barmpakos¹,

Moschos²,

Syrový³

et al. 2020

Flex. Print. Electron.

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This work presents the development and evaluation of a fully printed multi-directional thermal flow sensor on PET substrate. The device consists of conductive Ag tracks and printed thermistors based on BaTiO 3 , activated carbon and a solvent based thermoset polymeric system. Each element presents similar temperature-electrical resistance behavior (in terms of normalized values), thus enabling utilization as sensing and active elements for thermal two-dimensional flow sensing. A custom experimental setup was used for evaluating the device under two modes of operation, namely constant current and constant resistance. It was observed that in the range of 0 to 25 standard liters per second (SLPM) of air flow, constant resistance provided better input dynamic range than constant current (2.75 and 0.12 mW respectively), while constant resistance mode exhibited a sensitivity of approximately two orders of magnitude greater than that of constant current mode. For constant resistance mode, sensitivities of 0.46 mW/SLPM for zero flow and 0.08 mW/SLPM for flow greater than 6 SLPM were extracted, while for constant current mode the corresponding sensitivity values were 0.018 mW/SLPM for zero flow and 0.0036 mW/SLPM for flow greater than 6 SLPM. The device was capable of successfully detecting the flow direction throughout the target flow range. The influence of the flow magnitude on detecting flow angle was found to be negligible. The proposed device can be mounted to various non-planar surfaces, after the necessary re-calibration. It can be mass produced with various printing technologies for applications as a flexible two-dimensional flow sensor with low fabrication cost.

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A screen-printed flexible flow sensor

Cited by 10 publications

References 34 publications

Advances in Printed Electronic Textiles

Advances in Printed Electronic Textiles

Low-Cost Microfabrication Tool Box

A fully printed flexible multidirectional thermal flow sensor

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