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Applied Sciences
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Printed Function Sensors
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Printed Function Sensors

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Chemical and Molecular Sciences".

Deadline for manuscript submissions: closed (28 February 2022) | Viewed by 12736

Special Issue Editor

Prof. Dr. Sooman Lim

E-Mail Website
Guest Editor
Department of Flexible and Printable Electronics, LANL-JBNU Engineering Institute-Korea, Jeonbuk National University, Jeonju 54896, Korea
Interests: printed electronics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the era of the 4th Industrial Revolution, the printed electronics market is gradually expanding, and the advantages of the printed electronic sensor are highlighted by grafting with existing sensing technologies as well as IoT (Internet of Things) systems and smart packaging. This trend is supported by certain features of printed functional sensors, such as the utilization of various substrates, low-cost processes, and the possibility of mass productivity.

This Special Issue focuses on research to produce a variety of functional sensors using a printing or roll-to-roll process. It accepts materials with original and creative research findings and review articles related to printed functional sensors and allows readers to learn more about the technology associated with their availability to help everyone.

Therefore, we welcome articles that report the latest technology on sensor materials, concepts, fabrication and testing technology, printing on new substrates and application-oriented print sensor systems and closely-related topics.

Prof. Dr. Sooman Lim
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Applied Sciences is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Printed functional sensor
  • Flexible/stretchable substrate
  • Inkjet printing
  • Screen printing
  • Gravure printing
  • EHD printing
  • Roll-to-roll technology
  • Wearable devices
  • Smart packaging
  • IoT technology

Published Papers (4 papers)

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Research

16 pages, 49055 KiB  
Article
Fabrication of Conductive and Gas-Sensing Microstructures Using Focused Deposition of Copper Nanoparticles Synthesized by Spark Discharge
by Alexey A. Efimov, Denis V. Kornyushin, Arseny I. Buchnev, Ekaterina I. Kameneva, Anna A. Lizunova, Pavel V. Arsenov, Andrey E. Varfolomeev, Nikita B. Pavzderin, Alexey V. Nikonov and Victor V. Ivanov
Appl. Sci. 2021, 11(13), 5791; https://doi.org/10.3390/app11135791 - 22 Jun 2021
Cited by 5 | Viewed by 2271
Abstract
Solvent-free aerosol jet printing has been investigated for fabricating metallic and semiconductor (gas-sensitive) microstructures based on copper nanoparticles on alumina, borosilicate glass, and silicon substrates. The synthesis of nanoparticles was carried out using a spark discharge directly in the printing process without the [...] Read more.
Solvent-free aerosol jet printing has been investigated for fabricating metallic and semiconductor (gas-sensitive) microstructures based on copper nanoparticles on alumina, borosilicate glass, and silicon substrates. The synthesis of nanoparticles was carried out using a spark discharge directly in the printing process without the stage of preparing nano-ink. Printed lines with a width of 100–150 µm and a height of 5–7 µm were formed from submicron agglomerates consisting of primary nanoparticles 10.8 ± 4.9 nm in size with an amorphous oxide shell. The electrical resistivity, surface morphology, and shrinkage of printed lines were investigated depending on the reduction sintering temperature. Sintering of copper oxides of nanoparticles began at a temperature of 450 °C in a hydrogen atmosphere with shrinkage at the level of 45–60%. Moreover, aerosol heat treatment was used to obtain highly conductive lines by increasing the packing density of deposited nanoparticles, providing in-situ transformation of submicron agglomerates into spherical nanoparticles with a size of 20–50 nm. Copper lines of spherical nanoparticles demonstrated excellent resistivity at 5 μΩ·cm, about three times higher than that of bulk copper. In turn, semiconductor microstructures based on unsintered agglomerates of oxidized copper have a fairly high sensitivity to NH3 and CO. Values of response of the sensor based on non-sintered oxidized copper nanoparticles to ammonia and carbon monoxide concentration of 40 ppm were about 20% and 80%, respectively. Full article
(This article belongs to the Special Issue Printed Function Sensors)
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8 pages, 11642 KiB  
Article
Effect of a Urethane Acrylate-Based Photosensitive Coating on the Reliability of Ag Nanowire Transparent Electrodes
by Heebo Ha, Yeongjae Seo, Paolo Matteini, Xue Qi, Sooman Lim and Byungil Hwang
Appl. Sci. 2021, 11(5), 2162; https://doi.org/10.3390/app11052162 - 01 Mar 2021
Viewed by 1447
Abstract
Due to the susceptibility of Ag nanowires to external mechanical and chemical damage, maintaining high optical performance and ambient and mechanical stability during the fabrication process is important for the industrial use of Ag nanowire transparent electrodes (TEs). In this study, urethane acrylate-based [...] Read more.
Due to the susceptibility of Ag nanowires to external mechanical and chemical damage, maintaining high optical performance and ambient and mechanical stability during the fabrication process is important for the industrial use of Ag nanowire transparent electrodes (TEs). In this study, urethane acrylate-based photosensitive resin (UAPR) is used as the coating material for Ag nanowire TEs to improve their optical transmittance, ambient stability, and resistance to external wiping damage. In the proposed method, UV-curable UAPR is coated onto Ag nanowire TEs using a simple doctor blade, forming a protective coating that increases the optical transmittance of the electrodes due to the refractive index of the UAPR between the air and the substrate. The UAPR coating successfully protects the Ag nanowires from corrosion in ambient air, with no significant change in their optical or electrical properties observed after 180 h of exposure to ambient air. Mechanical wiping tests also confirm that the UAPR coating is effective in protecting the Ag nanowires from external wiping damage, with no degradation of the optical or electrical properties observed after six wiping cycles. Full article
(This article belongs to the Special Issue Printed Function Sensors)
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20 pages, 7930 KiB  
Article
Platinum Based Nanoparticles Produced by a Pulsed Spark Discharge as a Promising Material for Gas Sensors
by Ivan A. Volkov, Nikolay P. Simonenko, Alexey A. Efimov, Tatiana L. Simonenko, Ivan S. Vlasov, Vladislav I. Borisov, Pavel V. Arsenov, Yuri Yu. Lebedinskii, Andrey M. Markeev, Anna A. Lizunova, Artem S. Mokrushin, Elizaveta P. Simonenko, Vadim A. Buslov, Andrey E. Varfolomeev, Zhifu Liu, Alexey A. Vasiliev and Victor V. Ivanov
Appl. Sci. 2021, 11(2), 526; https://doi.org/10.3390/app11020526 - 07 Jan 2021
Cited by 18 | Viewed by 4120
Abstract
We have applied spark ablation technology for producing nanoparticles from platinum ingots (purity of 99.97 wt. %) as a feed material by using air as a carrier gas. A maximum production rate of about 400 mg/h was achieved with an energy per pulse [...] Read more.
We have applied spark ablation technology for producing nanoparticles from platinum ingots (purity of 99.97 wt. %) as a feed material by using air as a carrier gas. A maximum production rate of about 400 mg/h was achieved with an energy per pulse of 0.5 J and a pulse repetition rate of 250 Hz. The synthesized nanomaterial, composed of an amorphous platinum oxide PtO (83 wt. %) and a crystalline metallic platinum (17 wt. %), was used for formulating functional colloidal ink. Annealing of the deposited ink at 750 °C resulted in the formation of a polycrystalline material comprising 99.7 wt. % of platinum. To demonstrate the possibility of application of the formulated ink in printed electronics, we have patterned conductive lines and microheaters on alumina substrates and 20 μm thick low-temperature co-fired ceramic (LTCC) membranes with the use of aerosol jet printing technology. The power consumption of microheaters fabricated on LTCC membranes was found to be about 140 mW at a temperature of the hot part of 500 °C, thus allowing one to consider these structures as promising micro-hotplates for metal oxide semiconductor (MOS) gas sensors. The catalytic activity of the synthesized nanoparticles was demonstrated by measuring the resistance transients of the non-sintered microheaters upon exposure to 2500 ppm of hydrogen. Full article
(This article belongs to the Special Issue Printed Function Sensors)
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10 pages, 3266 KiB  
Article
Printability of the Screen-Printed Strain Sensor with Carbon Black/Silver Paste for Sensitive Wearable Electronics
by Xue Qi, Heebo Ha, Byungil Hwang and Sooman Lim
Appl. Sci. 2020, 10(19), 6983; https://doi.org/10.3390/app10196983 - 06 Oct 2020
Cited by 23 | Viewed by 4140
Abstract
Printing technology enables not only high-volume, multipurpose, low-impact, low-cost manufacturing, but also the introduction of flexible electronic devices, such as displays, actuators, and sensors, to a wide range of consumer markets. Consequently, in the past few decades, printed electronic products have attracted considerable [...] Read more.
Printing technology enables not only high-volume, multipurpose, low-impact, low-cost manufacturing, but also the introduction of flexible electronic devices, such as displays, actuators, and sensors, to a wide range of consumer markets. Consequently, in the past few decades, printed electronic products have attracted considerable interest. Although flexible printed electronic products are attracting increasing attention from the scientific and industrial communities, a systematic study on their sensing performance based on printability has not been reported so far. In this study, carbon black/Ag nanocomposites were utilized as pastes for a flexible wearable strain sensor. The effects of the rheological property of the pastes and the pattern dimensions of the printed electrodes on the sensor’s performance were investigated. Consequently, the printed sensor demonstrated a high gauge factor of 444.5 for an applied strain of 0.6% to 1.4% with a durability of 1000 cycles and a linearity of R2 = 0.9974. The sensor was also stable under tough environmental conditions. Full article
(This article belongs to the Special Issue Printed Function Sensors)
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