Advances in printing technologies for soft robotics devices applications

Angeli, Martina Aurora Costa; Ciocca, Manuela; Petti, Luisa; Lugli, Paolo

doi:10.1016/bs.ache.2021.05.001

Cited by 6 publications

(11 citation statements)

References 101 publications

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“…The selection of the two types of conductive inks was motivated by the different requirements of the employed PTs. Indeed, screen and dispense techniques are able to deposit shear-thinning thixotropic non-Newtonian' fluids with a viscosity between 5000 and 10 000 cPs [8,44], whereas inkjet printing can print nanoparticle inks of low viscosity (10-12 cPs), having a particle size 100 times lower than the nozzle diameter to avoid clogging [45]. As a final printing process step, the screen-and dispense-printed IDEs were sintered in the oven at 120 • C for 15 min and the inkjet-printed ones for 25 min, as suggested by the manufacturer datasheet.…”

Section: Electrodes Printingmentioning

confidence: 99%

“…In the last decade, several manufacturing technologies have been extensively exploited to fabricate gas sensors, including chemical vapor deposition [1], physical vapor deposition [2], micromachining [3], self-assembly [4], spray coating [5,6], and printing [7,8]. Among all, the latter is the most commonly utilized technology for developing miniaturized, portable, and low-cost sensors [9].…”

Section: Introductionmentioning

confidence: 99%

“…Printing is an additive manufacturing technique that follows a bottom-up approach to realize electronic devices by sequentially adding layers of thickness ranging from the nanometer range [14] to µm [8], depending on the technique. This method substantially reduces the energy consumption and the total fabrication cost, and also it is easy to redesign in comparison with conventional lithographic techniques, where multiple steps are needed for every single layer to be realized [9].…”

Section: Introductionmentioning

confidence: 99%

“…This method substantially reduces the energy consumption and the total fabrication cost, and also it is easy to redesign in comparison with conventional lithographic techniques, where multiple steps are needed for every single layer to be realized [9]. Today many PTs are available, each characterized by different properties such as screen printing, laser direct writing, inkjet printing, soft lithography, flexography, gravure printing, and aerosol printing [8,15].…”

Section: Introductionmentioning

confidence: 99%

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Comparison of printing techniques for the fabrication of flexible carbon nanotube-based ammonia chemiresistive gas sensors

Vasquez,

Costa Angeli,

Petrelli

et al. 2023

Flex. Print. Electron.

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Even though a plethora of printing technologies are currently available and their potential for the fabrication of low-cost and flexible sensors has been widely investigated, systematically based, and statistically sustained comparative studies are missing in theliterature. In this work, we compare screen, inkjet, and dispense printing for the fabrication of carbon nanotube (CNT)-based ammonia (NH3) chemiresistive flexible gas sensors for the first time. Moreover, we report the first CNT-based gas sensor fabricated via Voltera printer. The devices were made of a thin layer of spray-coated CNTs and printed silver- based interdigitated electrodes. To draw a thoughtful comparison the same sensor layout,materials, and fabrication flow were used. The device morphological features were acquired through microscopic, AFM, and 3D images; additionally, the response to NH3 as well as the printing process characteristics for each technique was analyzed. From 300 μm nominal spacing between lines, we obtained a decrease of 25%, 13%, and 5% on the printed spacings with dispense, screen, and inkjet printing, respectively. At 100 ppm of NH3, a maximum response of 33%, 31%, and 27% with the dispense-, inkjet-, and screen-printed sensors were found, respectively. Statistical differences were observed between the mean values on theNH3 response of dispense- compared to the inkjet- and screen-printed sensors, which in effect showed the highest response in the Tukey test. This demonstrated that the fabrication technique employed can induce a different response mainly driven by the printed outcomes. Following a holistic approach that includes the sensor response, the application, the market perspective, and the process versatility, we suggest screen printing as the most suitable method for CNT- based NH3 gas sensor fabrication.

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Section: Electrodes Printingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Comparison of printing techniques for the fabrication of flexible carbon nanotube-based ammonia chemiresistive gas sensors

Vasquez,

Costa Angeli,

Petrelli

et al. 2023

Flex. Print. Electron.

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“…During screen printing, the filling and separation process happen almost simultaneously, with the separation process influenced by several parameters, such as the squeegee speed, snap-off distance and screen deformation. 10,11 In contrast, the single print parameter controlling the separation process on stencil printing is the separation speed, which significantly facilitates the process on finding optimal process conditions. As result, higher squeegee speeds can be utilized for the filling process on stencil printing to minimize overall cycle times.…”

Section: Introductionmentioning

confidence: 99%

Stencil printing of adhesive-based fuel cell sealings: The influence of rheology on bubble formation during the separation step

Indicatti

Radler

Günter

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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The widespread deployment of fuel cell technology requires the development of new manufacturing technologies to turn it economically viable. Stencil printing is known as one of the highest throughput techniques for applying adhesives, where a moving squeegee forces the adhesive through pre-defined apertures in a stencil onto a substrate. Thus, stencil printing is investigated as an innovative method to reduce production costs and manufacturing cycle times of fuel cell sealings. Moreover, in order to allow a greater design freedom, adhesive layer thicknesses up to 500 µm should be printable under reproducible conditions and within cycle times <3 s, which have not been realized or implemented until today. With the aim of printing closed-loop structures (sealings), a mesh located on the upper region of the aperture needs to be integrated. However, this mesh can produce additional air bubbles and surface irregularities, which might affect the sealing performance and diminish the process stability. This paper describes the experimentally identified formation mechanisms of bubbles during the separation step. The quantity and size of these bubbles were measured for five separation speeds, two mesh opening sizes and three adhesive systems (UV-curable acrylic). Primary focus was placed on relating the print results with the adhesive rheological properties, which are decisive to successfully implement the sealing application process. It was found that a previously derived empirical relationship to predict the adhesive tendency to stretch filaments can be employed as a model to quantitatively assess the characteristics of bubbles that emerge during the separation step and thus specify rheological properties to enhance print quality.

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Laser‐Induced, Green and Biocompatible Paper‐Based Devices for Circular Electronics

Cantarella

Madagalam

Merino

et al. 2023

Adv Funct Materials

Self Cite

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The growing usage and consumption of electronics-integrated items into the daily routine has raised concerns on the disposal and proper recycling of these components. Here, a fully sustainable and green technology for the fabrication of different electronics on fruit-waste derived paper substrate, is reported. The process relies on the carbonization of the topmost surface of different cellulose-based substrates, derived from apple-, kiwi-, and grape-based processes, by a CO 2 laser. By optimizing the lasing parameters, electronic devices, such as capacitors, biosensors, and electrodes for food monitoring as well as heart and respiration activity analysis, are realized. Biocompatibility tests on fruit-based cellulose reveal no shortcoming for onskin applications. The employment of such natural and plastic-free substrate allows twofold strategies for electronics recycling. As a first approach, device dissolution is achieved at room temperature within 40 days, revealing transient behavior in natural solution and leaving no harmful residuals. Alternatively, the cellulose-based electronics is reintroduced in nature, as possible support for plant seeding and growth or even soil amendment. These results demonstrate the realization of green, low-cost and circular electronics, with possible applications in smart agriculture and the Internet-of-Thing, with no waste creation and zero or even positive impact on the ecosystem.

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Advances in printing technologies for soft robotics devices applications

Cited by 6 publications

References 101 publications

Comparison of printing techniques for the fabrication of flexible carbon nanotube-based ammonia chemiresistive gas sensors

Comparison of printing techniques for the fabrication of flexible carbon nanotube-based ammonia chemiresistive gas sensors

Stencil printing of adhesive-based fuel cell sealings: The influence of rheology on bubble formation during the separation step

Laser‐Induced, Green and Biocompatible Paper‐Based Devices for Circular Electronics

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