scholarly journals Printing the Ultra-Long Ag Nanowires Inks onto the Flexible Textile Substrate for Stretchable Electronics

Nanomaterials ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 686 ◽  
Author(s):  
Sheng-Hai Ke ◽  
Qing-Wen Xue ◽  
Chuan-Yuan Pang ◽  
Pan-Wang Guo ◽  
Wei-Jing Yao ◽  
...  
Keyword(s):  
Screen Printing ◽  
Low Cost ◽  
Electronic Devices ◽  
Cost Effective ◽  
Water Soluble ◽  
Stretchable Electronics ◽  
Intrinsic Structure ◽  
Flexible Devices ◽  
Ag Nanowires ◽  
Stretchable Circuits

Printing technology offers a simple and cost-effective opportunity to develop all-printed stretchable circuits and electronic devices, possibly providing ubiquitous, low-cost, and flexible devices. To successfully prepare high-aspect-ratio Ag nanowires (NWs), we used water and anhydrous ethanol as the solvent and polyvinylpyrrolidone (PVP) as the viscosity regulator to obtain a water-soluble Ag NWs conductive ink with good printability. Flexible and stretchable fabric electrodes were directly fabricated through screen printing. After curing at room temperature, the sheet resistance of the Ag NW fabric electrode was 1.5 Ω/sq. Under a tensile strain of 0–80% and with 20% strains applied for 200 cycles, good conductivity was maintained, which was attributed to the inherent flexibility of the Ag NWs and the intrinsic structure of the interlocked texture.

scholarly journals Optimization of a Handwriting Method by an Automated Ink Pen for Cost-Effective and Sustainable Sensors

Chemosensors ◽  
2021 ◽  
Vol 9 (9) ◽  
pp. 264
Author(s):  
Florin C. Loghin ◽  
José F. Salmerón ◽  
Paolo Lugli ◽  
Markus Becherer ◽  
Aniello Falco ◽  
...  
Keyword(s):  
Printed Electronics ◽  
Low Cost ◽  
Electronic Devices ◽  
Cost Effective ◽  
Capacitive Sensor ◽  
Fabrication Technique ◽  
Rfid Tag ◽  
Environmental Friendly ◽  
Fast Prototyping ◽  
Do It Yourself

In this work, we present a do-it-yourself (DIY) approach for the environmental-friendly fabrication of printed electronic devices and sensors. The setup consists only of an automated handwriting robot and pens filled with silver conductive inks. Here, we thoroughly studied the fabrication technique and different optimized parameters. The best-achieved results were 300 mΩ/sq as sheet resistance with a printing resolution of 200 µm. The optimized parameters were used to manufacture fully functional electronics devices: a capacitive sensor and a RFID tag, essential for the remote reading of the measurements. This technique for printed electronics represents an alternative for fast-prototyping and ultra-low-cost fabrication because of both the cheap equipment required and the minimal waste of materials, which is especially interesting for the development of cost-effective sensors.

Properties of silver chloride and carbon screen printed patterns on different textiles

2021 ◽  
pp. 004051752110050
Author(s):  
Victor Toral ◽  
Andreas Albrecht ◽  
Encarnación Castillo ◽  
Antonio García ◽  
Markus Becherer ◽  
...  
Keyword(s):  
Screen Printing ◽  
Silver Chloride ◽  
Electronic Devices ◽  
Cost Effective ◽  
Smart Textiles ◽  
Flexible Materials ◽  
Good Repeatability ◽  
Printed Patterns ◽  
Insight Into ◽  
Selection Of

Smart textiles, known also as e-textiles, are of great interest for the development of healthcare and wellness applications that require the embedding of electronic devices into the fabrics. Although many prototype proposals may be found in the literature, the generalization and commercialization of e-textiles is limited by the lack of cost-effective, standard fabrication processes that can be applied to a large variety of fabrics. In this contribution, we analyze the deposition of silver and carbon pastes by screen printing methods on a wide selection of daily-use textiles, to gain insight into the main features to be considered when developing cost-effective smart textiles. Results show the prospects offered by screen printing to create conductive patterns over textile and flexible materials with sheet resistances lower than 1 Ω/sq and a good repeatability in the dimensions of the patterns.

scholarly journals Rapid Fabrication of Epidermal Paper-Based Electronic Devices Using Razor Printing

Micromachines ◽  
2018 ◽  
Vol 9 (9) ◽  
pp. 420 ◽  
Author(s):  
Behnam Sadri ◽  
Debkalpa Goswami ◽  
Ramses Martinez
Keyword(s):  
Low Cost ◽  
Electronic Devices ◽  
Cost Effective ◽  
Physiological Signals ◽  
Manufacturing Processes ◽  
Wireless Power ◽  
Fast Mapping ◽  
High Moisture ◽  
Mechanical Reinforcement ◽  
Rapid Fabrication

This work describes the use of a benchtop razor printer to fabricate epidermal paper-based electronic devices (EPEDs). This fabrication technique is simple, low-cost, and compatible with scalable manufacturing processes. EPEDs are fabricated using paper substrates rendered omniphobic by their cost-effective silanization with fluoroalkyl trichlorosilanes, making them inexpensive, water-resistant, and mechanically compliant with human skin. The highly conductive inks or thin films attached to one of the sides of the omniphobic paper makes EPEDs compatible with wearable applications involving wireless power transfer. The omniphobic cellulose fibers of the EPED provide a moisture-independent mechanical reinforcement to the conductive layer. EPEDs accurately monitor physiological signals such as ECG (electrocardiogram), EMG (electromyogram), and EOG (electro-oculogram) even in high moisture environments. Additionally, EPEDs can be used for the fast mapping of temperature over the skin and to apply localized thermotherapy. Our results demonstrate the merits of EPEDs as a low-cost platform for personalized medicine applications.

Flexible Electronic Devices From Hot Embossing Materials Transfer

2005 ◽  
Author(s):  
Ashante’ Allen ◽  
Andrew Cannon ◽  
William King ◽  
Samuel Graham
Keyword(s):  
Flexible Electronics ◽  
Low Cost ◽  
Electronic Devices ◽  
Building Blocks ◽  
Transfer Printing ◽  
Flexible Devices ◽  
Planar Surfaces ◽  
Flexible Electronic ◽  
Semiconductor Nanomaterials ◽  
Flexible Electronic Devices

The development of processing methods for flexible electronic devices is seen as an enabling technology for the creation of a new array of semiconductor products. These devices have the potential be low cost, disposable, and can be applied to deformable or non-planar surfaces. While much effort has been put into the development of amorphous silicon and organic semiconductor technology for flexible devices, semiconductor nanomaterials are of interest due to their inherently flexibility, high transport mobilities, and their unique optoelectronic and piezoelectric properties. However, the synthesis of these materials directly onto polymer substrates is not feasible due to the high temperatures or harsh chemical environments under which they are synthesized. This challenge has limited the development of flexible electronics with semiconductor nanomaterial building blocks. A number of techniques which address the manufacturing concerns include solution based processing [1,2] as well as dry transfer techniques [3–5]. In general, dry transfer printing methods carry advantages over solution based processing as the need to address substrate-fluid compatibility is mitigated.

Preparation of Cu2ZnSnS4 Film by Printing Process for Low-Cost Solar Cell

2011 ◽  
Vol 335-336 ◽  
pp. 1406-1411 ◽  
Author(s):  
Qin Miao Chen ◽  
Xiao Ming Dou ◽  
Zhen Qing Li ◽  
Shu Yi Cheng ◽  
Song Lin Zhuang
Keyword(s):  
Solar Cell ◽  
Screen Printing ◽  
Low Cost ◽  
Short Circuit ◽  
Cost Effective ◽  
Short Circuit Current ◽  
Short Circuit Current Density ◽  
Open Circuit ◽  
Printing Process ◽  
Annealing Effects

Cu2ZnSnS4(CZTS) film was prepared by screen printing process with the advantages of simple, high-effective and cost-effective. The annealing effects on the screen printed CZTS films were studied. It was found that the crystallinity of the CZTS can be effectively improved by the annealing process, whereas overlong annealing can also introduce defects to the CZTS. The bandgap value of the CZTS is about 1.4 eV. The short-circuit current density, open-circuit voltage, fill factor and conversion efficiency of the best solar cell with superstrate structure of Carbon/CZTS/In2S3/TiO2/FTO glass (without using any vacuum conditions) are 6.20 mA/cm2, 290 mV, 0.29 and 0.53%, respectively.

scholarly journals Malachite Green Removal by Activated Potassium Hydroxide Clove Leaf Agrowaste Biosorbent: Characterization, Kinetic, Isotherm, and Thermodynamic Studies

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Dyan Hatining Ayu Sudarni ◽  
Uyiosa Osagie Aigbe ◽  
Kingsley Eghonghon Ukhurebor ◽  
Robert Birundu Onyancha ◽  
Heri Septya Kusuma ◽  
...  
Keyword(s):  
Malachite Green ◽  
Potassium Hydroxide ◽  
Low Cost ◽  
Cost Effective ◽  
Sorption Process ◽  
Water Soluble ◽  
Maximum Sorption Capacity ◽  
Effective Removal ◽  
Maximum Sorption

Although several approaches have been explored for the removal of dyes and other toxic materials from water as well as the entire environment, notwithstanding, researchers/scientists are still pursuing novel, low-cost, and eco-friendly biosorbents for the effective removal of such contaminants. Herein, clove leaves (CL) were utilized as a biosorbent for the sequestration of malachite green (MG) from a water-soluble solution. The CL was subsequently activated using potassium hydroxide (KOH) and characterized using the FTIR and FESEM to determine the functional groups on the activated clove leaves (CL-KOH) and the morphology of the adsorbent. The adsorption of MG was observed to be relatively dependent on the dosage of sorbent utilized, initial MG concentration, and sorption process contact time. The adsorption process of MG to CL was ideally described using the Dubinin–Radushkevich and Elovich models with the determination of maximum sorption capacity of approximately 131.6 mg·g-1. Furthermore, the thermodynamic parameters calculated showed that the adsorption of MG to the adsorbent was exothermic with the process involving physical sorption as well as chemical sorption processes with negligible adsorption energy. In conclusion, the study has revealed that the CL is a cost-effective biosorbent with high adsorption efficiency for the sequestration of MG from a water-soluble solution and can be recycled for further usage.

scholarly journals Quick and Cost-Effective Estimation of Vitamin C in Multifruit Juices Using Voltammetric Methods

Sensors ◽  
2020 ◽  
Vol 20 (3) ◽  
pp. 676 ◽  
Author(s):  
Jose-Antonio López-Pastor ◽  
Ascensión Martínez-Sánchez ◽  
Juan Aznar-Poveda ◽  
Antonio-Javier García-Sánchez ◽  
Joan García-Haro ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
High Performance Liquid Chromatography ◽  
Liquid Chromatography ◽  
High Performance ◽  
Limit Of Detection ◽  
Low Cost ◽  
Cost Effective ◽  
Water Soluble ◽  
Screen Printed Electrode ◽  
Voltammetric Methods

Ascorbic Acid (AA) is a natural and powerful water-soluble antioxidant associated with long-lasting food products. As time passes, the AA content in products sharply decreases, and they become increasingly degraded. There are several techniques to precisely quantify AA concentrations. However, most of them employ costly laboratory instruments, such as High-Performance Liquid Chromatography (HPLC) or complex electrochemical methods, which make unfeasible recurrent AA measurements along the entire supply chain. To address this issue, we contribute with an in-field and real-time voltammetric method, carried out with a low-cost, easy-to-use, and portable device. An unmodified Screen-Printed Electrode (SPE) is used together with the device to achieve short reading times. Our method has been extensively tested in two multifruit juices using three different SPEs. Calibration curves and Limit of Detection were derived for each SPE. Furthermore, periodic experiments were conducted to study the shelf life of juices under consideration. During the analysis, a set of assays for each SPE were implemented to determine the remaining AA amount per juice and compare it with that obtained using HPLC under the same conditions. Results revealed that our cost-effective device is fully comparable to the HPLC equipment, as long as the juice does not include certain interferents; a scenario also contemplated in this article.

scholarly journals Implementation of Radiating Elements for Radiofrequency Front-Ends by Screen-Printing Techniques for Internet of Things Applications

Sensors ◽  
2019 ◽  
Vol 19 (16) ◽  
pp. 3626 ◽  
Author(s):  
Imanol Picallo ◽  
Hicham Klaina ◽  
Peio Lopez-Iturri ◽  
Aitor Sánchez ◽  
Leire Méndez-Giménez ◽  
...  
Keyword(s):  
Internet Of Things ◽  
Screen Printing ◽  
Low Cost ◽  
Cost Effective ◽  
Wireless Transceivers ◽  
Test Environment ◽  
Angular Deflection ◽  
Wide Range ◽  
Flexible Antenna ◽  
Printing Techniques

The advent of the Internet of Things (IoT) has led to embedding wireless transceivers into a wide range of devices, in order to implement context-aware scenarios, in which a massive amount of transceivers is foreseen. In this framework, cost-effective electronic and Radio Frequency (RF) front-end integration is desirable, in order to enable straightforward inclusion of communication capabilities within objects and devices in general. In this work, flexible antenna prototypes, based on screen-printing techniques, with conductive inks on flexible low-cost plastic substrates is proposed. Different parameters such as substrate/ink characteristics are considered, as well as variations in fabrication process or substrate angular deflection in device performance. Simulation and measurement results are presented, as well as system validation results in a real test environment in wireless sensor network communications. The results show the feasibility of using screen-printing antenna elements on flexible low-cost substrates, which can be embedded in a wide array of IoT scenarios.

Effect of the basic surface properties of woven lining fabric on printing precision and electrical performance of screen-printed conductive lines

2019 ◽  
Vol 90 (11-12) ◽  
pp. 1212-1223
Author(s):  
Hong Hong ◽  
Jiyong Hu ◽  
Xiong Yan
Keyword(s):  
Contact Angle ◽  
Line Width ◽  
Screen Printing ◽  
Low Cost ◽  
Electronic Devices ◽  
Dynamic Contact Angle ◽  
Dynamic Contact ◽  
Electrical Performance ◽  
Texture Characteristic ◽  
Screen Printed

Conductive lines are essential for the integration of electronic devices into fabrics, and their direct screen printing on fabrics is a promising, simple and low-cost method for mass-manufactured textile-based conductive lines. However, the intrinsic porous structures and texture characteristic of textiles complicate the diffusion and penetration of conductive ink, and will deteriorate the printing precision and electrical performance of conductive lines. To establish the relationship between the surface characteristics (i.e. porosity, roughness, contact angle) and printing precision as well as electrical performance, the screen-printed conductive lines on six different nylon woven lining fabrics were examined and compared. Moreover, to study the printing precision and the minimum printable line width on woven lining fabric, conductive lines with different widths were screen printed. The results showed that the fabric substrate with the smallest pore size and roughness shows a higher printing precision and lower electrical resistance of screen-printed conductive lines. Relatively, the dynamic contact angle and wetting time of ink on the surface of the fabric have a significant effect on the printing precision. Therefore, the surface structure of the fabric substrate determines to some degree the printing precision of conductive lines, the printable minimum line width and its electrical properties. It is believed that these findings will provide some important support for screen printing flexible electronic devices on woven textiles.

Fabricating Microchannels in Elastomer Substrates for Stretchable Electronics

2016 ◽  
Author(s):  
Michelle C. Yuen ◽  
Rebecca K. Kramer
Keyword(s):  
Flexible Electronics ◽  
Electronic Devices ◽  
Stretchable Electronics ◽  
Flexible Substrates ◽  
Soft Sensors ◽  
Elastic Substrate ◽  
Conductive Fluid ◽  
Manufacturing Method ◽  
Flexible Devices ◽  
Soft Electronics

As flexible devices and machines become more ubiquitous, there is a growing need for similarly deformable electronics. Soft polymers continue to be widely used as stretchable and flexible substrates for soft electronics, and in particular, soft sensing. These soft sensors generally consist of a highly elastic substrate with embedded microchannels filled with a conductive fluid. Deforming the substrate deforms the embedded microchannels and induces a change in the electrical resistance through the conductive fluid. Microchannels, thus, are the foundation of flexible electronic devices and sensors. These microchannels have been fabricated using various methods, where the manufacturing method greatly impacts device functionality. In this paper, comparisons are made between the following methods of microchannel manufacturing: cast molding, 3D printing of the elastomer substrate itself, and laser ablation. Further processing of the microchannels into flexible electronics is also presented for all three methods. Lastly, recommended ranges of microchannel sizes and their associated reproducibility and accuracy measures for each manufacturing method are presented.

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