Screen printed flexible Bi2Te3-Sb2Te3 based thermoelectric generator

This paper reports the fabrication and testing of Bismuth Tellurium (Bi2Te3) – Antimony Tellurium (Sb2Te3) based thermocouples using screen printing technology. In this study, screen printable thermoelectric pastes were developed and the transport properties of cured material were measured. The dimension of each planer thermoleg is 39.3 mm × 3 mm with a thickness of 67 µm for Bi2Te3 leg and 62 µm for Sb2Te3 leg. A single thermocouple with this dimension can generate a voltage of 6 mV and a peak output power of 48 nW at a temperature difference of 20°C. The calculated Seebeck coefficient of a single thermocouple is in the range of 262 to 282 µV/K. The Seebeck coefficient at room temperature were measured to be -134 to -119 µV/K and 128 to 134 µV/K for Bi2Te3 and Sb2Te3 respectively. This work demonstrates that the low-cost screen printing technology and low-temperature materials are promising for the fabrication of flexible thermoelectric generators (TEGs)

Screen printing technology applied to silicon solar cell fabrication

The process for producing space qualified solar cells in both the conventional and wraparound configuration using screen printing techniques was investigated. Process modifications were chosen that could be easily automated or mechanized. Work was accomplished to optimize the tradeoffs associated with gridline spacing, gridline definition and junction depth. An extensive search for possible front contact metallization was completed. The back surface field structures along with the screen printed back contacts were optimized to produce open circuit voltages of at least an average of 600 millivolts. After all intended modifications on the process sequence were accomplished, the cells were exhaustively tested. Electrical tests at AMO and 28 C were made before and after boiling water immersion, thermal shock, and storage under conditions of high temperature and high humidity

Application of Screen-Printed Taste Sensor for Quality Control Of Milk Freshness.

A disposable taste sensor fabricate using screen-printing technology was developed to test various types of commercial milk products

Barium Titanate Thin Films Obtained by Screen Printing Technology

Barium titanate thin films have been obtained using screen printing of pastes based on BaTiO3 na-nopowders. Obtained pastes have been characterized by optical microscopy and optical profilometry. De-posit pattern geometry fidelity in regard to screen mask and films thickness and roughness parameter Ra during screen printing parameters changing depended on pastes rheological behavior. In addition, films roughness and thickness were strongly depended on solid and solvent content in pastes. Solvent content rising and BaTiO3 content lowering resulted in films thickness and roughness decreasing. Depending on paste solid and content barium titanate films thickness was changed from 1.56 to 3.18 m, the film rough-ness Ra from 50 to 196 nm and Rz from 160 to 393 nm. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3515

Developments and the preliminary tests of Resistive GEMs manufactured by a screen printing technology

We report promising initial results obtained with new resistive-electrode GEM (RETGEM) detectors manufactured, for the first time, using screen printing technology. These new detectors allow one to reach gas gains nearly as high as with ordinary GEM-like detectors with metallic electrodes; however, due to the high resistivity of its electrodes the RETGEM, in contrast to ordinary hole-type detectors, has the advantage of being fully spark protected. We discovered that RETGEMs can operate stably and at high gains in noble gases and in other badly quenched gases, such as mixtures of noble gases with air and in pure air; therefore, a wide range of practical applications, including dosimetry and detection of dangerous gases, is foreseeable. To promote a better understanding of RETGEM technology some comparative studies were completed with metallic-electrode thick GEMs. A primary benefit of these new RETGEMs is that the screen printing technology is easily accessible to many research laboratories. This accessibility encourages the possibility to manufacture these GEM-like detectors with the electrode resistivity easily optimized for particular experimental or practical applications

GEMs with Double Layred Micropattern Electrodes and their Applications

We have developed and tested several new designs of GEM detectors with micropattern electrodes manufactured by microelectronic technology. In one design, the inner layer of the detector electrode consists of thin metallic strips and the outer layer is made of a resistive grid manufactured by a screen printing technology. In other designs, the electrodes were made of metallic strips fed by HV via micro-resistors manufactured by a screen printing technology. Due to these features, the new detectors have several important advantages over conventional GEMs or ordinary thick GEMs. For example, the resistive grid (in the first design) and the screen printed resistors (in other designs) limited the current in case of discharges, making these detectors intrinsically spark-protected. We will here describe our tests with the photosensitive versions of these detectors (coated with CsI layers) and the efforts of implementing them in several applications. In particular, we will focus on our activity towards the ALICE RICH detector upgrade and on tests of simplified prototypes of cryogenic dark matter detectors.Comment: Presented at the IEEE Nucler Science Symposium, Dresden, 200

A Wearable Textile 2D Touchpad Sensor Based on Screen-Printing Technology

[EN] Among many of the designs used in the detection of 2D gestures for portable technology, the touchpad is one of the most complex and with more functions to implement. Its development has undergone a great push due to its use in displays, but it is not widely used with other technologies. Its application on textiles could allow a wide range of applications in the field of medicine, sports, etc. Obtaining a flexible, robust touchpad with good response and low cost is one of the objectives of this work. A textile touchpad based on a diamond pattern design using screen printing technology has been developed. This technology is widely used in the textile industry and therefore does not require heavy investments. The developed prototypes were analyzed using a particular controller for projected capacitive technologies (pro-cap), which is the most used in gesture detection. Two different designs were used to obtain the best configuration, obtaining a good result in both cases.This work was supported by Spanish Government/FEDER funds (grant number MAT2015-64139-C4-3-R (Mineco/Feder)). The work presented is also funded by the Conselleria d'Economia Sostenible, Sectors Productius i Treball, through IVACE (Instituto Valenciano de Competitividad Empresarial) and co-funded by ERDF funding from the EU. Application No. IMAMCI/2017/1.Ferri Pascual, J.; Lidon-Roger, JV.; Moreno Canton, J.; Martinez, G.; Garcia-Breijo, E. (2017). A Wearable Textile 2D Touchpad Sensor Based on Screen-Printing Technology. Materials. 10(12):1-16. https://doi.org/10.3390/ma10121450S1161012Takamatsu, S., Lonjaret, T., Ismailova, E., Masuda, A., Itoh, T., & Malliaras, G. G. (2015). Wearable Keyboard Using Conducting Polymer Electrodes on Textiles. Advanced Materials, 28(22), 4485-4488. doi:10.1002/adma.201504249McMillan, D., Brown, B., Lampinen, A., McGregor, M., Hoggan, E., & Pizza, S. (2017). Situating Wearables. Proceedings of the 2017 CHI Conference on Human Factors in Computing Systems. doi:10.1145/3025453.3025993Nirjon, S., Gummeson, J., Gelb, D., & Kim, K.-H. (2015). TypingRing. Proceedings of the 13th Annual International Conference on Mobile Systems, Applications, and Services - MobiSys ’15. doi:10.1145/2742647.2742665Rekimoto, J. (s. f.). GestureWrist and GesturePad: unobtrusive wearable interaction devices. Proceedings Fifth International Symposium on Wearable Computers. doi:10.1109/iswc.2001.962092Kim, K., Joo, D., & Lee, K.-P. (2010). Wearable-object-based interaction for a mobile audio device. Proceedings of the 28th of the international conference extended abstracts on Human factors in computing systems - CHI EA ’10. doi:10.1145/1753846.1754070Yoon, S. H., Huo, K., & Ramani, K. (2016). Wearable textile input device with multimodal sensing for eyes-free mobile interaction during daily activities. Pervasive and Mobile Computing, 33, 17-31. doi:10.1016/j.pmcj.2016.04.008Van Heek, J., Schaar, A. K., Trevisan, B., Bosowski, P., & Ziefle, M. (2014). User requirements for wearable smart textiles. Does the usage context matter (medical vs. sports)? Proceedings of the 8th International Conference on Pervasive Computing Technologies for Healthcare. doi:10.4108/icst.pervasivehealth.2014.255179Rogers, J. A., Someya, T., & Huang, Y. (2010). Materials and Mechanics for Stretchable Electronics. Science, 327(5973), 1603-1607. doi:10.1126/science.1182383Fan, J. A., Yeo, W.-H., Su, Y., Hattori, Y., Lee, W., Jung, S.-Y., … Rogers, J. A. (2014). Fractal design concepts for stretchable electronics. Nature Communications, 5(1). doi:10.1038/ncomms4266Bhalla, M. R., & Bhalla, A. V. (2010). Comparative Study of Various Touchscreen Technologies. International Journal of Computer Applications, 6(8), 12-18. doi:10.5120/1097-1433Walker, G. (2012). A review of technologies for sensing contact location on the surface of a display. Journal of the Society for Information Display, 20(8), 413-440. doi:10.1002/jsid.100Pedersen, H. C., Jakobsen, M. L., Hanson, S. G., Mosgaard, M., Iversen, T., & Korsgaard, J. (2011). Optical touch screen based on waveguide sensing. Applied Physics Letters, 99(6), 061102. doi:10.1063/1.3615656Emamian, S., Avuthu, S. G. R., Narakathu, B. B., Eshkeiti, A., Chlaihawi, A. A., Bazuin, B. J., … Atashbar, M. Z. (2015). Fully printed and flexible piezoelectric based touch sensitive skin. 2015 IEEE SENSORS. doi:10.1109/icsens.2015.7370651George, B., Zangl, H., Bretterklieber, T., & Brasseur, G. (2010). A Combined Inductive–Capacitive Proximity Sensor for Seat Occupancy Detection. IEEE Transactions on Instrumentation and Measurement, 59(5), 1463-1470. doi:10.1109/tim.2010.2040910Gunnarsson, E., Karlsteen, M., Berglin, L., & Stray, J. (2014). A novel technique for direct measurements of contact resistance between interlaced conductive yarns in a plain weave. Textile Research Journal, 85(5), 499-511. doi:10.1177/0040517514532158Enokibori, Y., Suzuki, A., Mizuno, H., Shimakami, Y., & Mase, K. (2013). E-textile pressure sensor based on conductive fiber and its structure. Proceedings of the 2013 ACM conference on Pervasive and ubiquitous computing adjunct publication - UbiComp ’13 Adjunct. doi:10.1145/2494091.2494158Wei, Y., Torah, R., Li, Y., & Tudor, J. (2016). Dispenser printed capacitive proximity sensor on fabric for applications in the creative industries. Sensors and Actuators A: Physical, 247, 239-246. doi:10.1016/j.sna.2016.06.005Gorgutsa, S., Gu, J. F., & Skorobogatiy, M. (2011). A woven 2D touchpad sensor and a 1D slide sensor using soft capacitor fibers. Smart Materials and Structures, 21(1), 015010. doi:10.1088/0964-1726/21/1/015010Hamdan, N. A., Heller, F., Wacharamanotham, C., Thar, J., & Borchers, J. (2016). Grabrics. Proceedings of the 2016 CHI Conference Extended Abstracts on Human Factors in Computing Systems - CHI EA ’16. doi:10.1145/2851581.2892529Kim, D.-K. (2010). A Touchpad for Force and Location Sensing. ETRI Journal, 32(5), 722-728. doi:10.4218/etrij.10.1510.007

Progress in Developing Hybrid RPCs: GEM-like Detectors with Resistive Electrodes

We have recently developed an innovative detector of photons and charged particles: a GEM-like gaseous amplification structure with resistive electrodes instead of commonly used metallic ones. This novel detector combines the best property of GEMs- the capability to operate in a cascaded mode and in poorly quenched gases - and of RPC: the protection against sparks. In this paper will shortly review our latest achievements in this direction, however the main focus will be given on a new advanced design that allows to build large area detectors manufactured by a screen printing technology. The proposed detector, depending on the applications, can operate either in a GEM mode (electron multiplications through holes only) or as a hybrid RPC with simultaneous amplifications in the drift region and in the holes. The possible applications of this new detector will be discussed

Recent advances in the fabrication and application of screen-printed electrochemical (bio)sensors based on carbon materials for biomedical, agri-food and environmental analyses

This review describes recent advances in the fabrication of electrochemical (bio)sensors based on screen-printing technology involving carbon materials and their application in biomedical, agri-food and environmental analyses. It will focus on the various strategies employed in the fabrication of screen-printed (bio)sensors, together with their performance characteristics; the application of these devices for the measurement of selected naturally occurring biomolecules, environmental pollutants and toxins will be discussed

Textile Concentric Ring Electrodes for ECG Recording Based on Screen-Printing Technology

[EN] Among many of the electrode designs used in electrocardiography (ECG), concentric ring electrodes (CREs) are one of the most promising due to their enhanced spatial resolution. Their development has undergone a great push due to their use in recent years; however, they are not yet widely used in clinical practice. CRE implementation in textiles will lead to a low cost, flexible, comfortable, and robust electrode capable of detecting high spatial resolution ECG signals. A textile CRE set has been designed and developed using screen-printing technology. This is a mature technology in the textile industry and, therefore, does not require heavy investments. Inks employed as conductive elements have been silver and a conducting polymer (poly (3,4-ethylenedioxythiophene) polystyrene sulfonate; PEDOT: PSS). Conducting polymers have biocompatibility advantages, they can be used with flexible substrates, and they are available for several printing technologies. CREs implemented with both inks have been compared by analyzing their electric features and their performance in detecting ECG signals. The results reveal that silver CREs present a higher average thickness and slightly lower skin-electrode impedance than PEDOT: PSS CREs. As for ECG recordings with subjects at rest, both CREs allowed the uptake of bipolar concentric ECG signals (BC-ECG) with signal-to-noise ratios similar to that of conventional ECG recordings. Regarding the saturation and alterations of ECGs captured with textile CREs caused by intentional subject movements, silver CREs presented a more stable response (fewer saturations and alterations) than those of PEDOT: PSS. Moreover, BC-ECG signals provided higher spatial resolution compared to conventional ECG. This improved spatial resolution was manifested in the identification of P1 and P2 waves of atrial activity in most of the BC-ECG signals. It can be concluded that textile silver CREs are more suitable than those of PEDOT: PSS for obtaining BC-ECG records. These developed textile electrodes bring the use of CREs closer to the clinical environment.Grant from the Ministerio de Economia y Competitividad y del Fondo Europeo de Desarrollo Regional. DPI2015-68397-R (MINECO/FEDER). This work was also supported by the Spanish Government/FEDER funds (grant number MAT2015-64139-C4-3-R (MINECO/FEDER)).Lidon-Roger, JV.; Prats-Boluda, G.; Ye Lin, Y.; Garcia Casado, FJ.; Garcia-Breijo, E. (2018). Textile Concentric Ring Electrodes for ECG Recording Based on Screen-Printing Technology. Sensors. 18(1):300-314. https://doi.org/10.3390/s18010300S30031418