Pub Date : 2022-07-10DOI: 10.1109/fleps53764.2022.9781569
Ayoub Zumeit, A. Dahiya, Adamos Christou, R. Dahiya
Uniform and large-area printing of high mobility nano/microscale structures can enable high-performance flexible electronics, which is much needed in numerous electronic and optoelectronic applications. In this work, we report an optimized direct roll transfer printing method to integrate arrays of high mobility silicon nanoribbon (Si NRs) in a single step on a variety of flexible substrates including polyimide, polyethylene terephthalate, and metal foils, etc. Compared to conventional transfer printing, the developed method does not require the use of elastomeric transfer stamp. In consequence, significant improvements are accomplished in terms of accuracy of printed structures (~100nm) and excellent transfer yield (~95%) over printed area of ~2 cm2. Such features are essential to achieve uniform device-to-device performance characteristics over large areas. Further, the dependency study of the applied force on transfer yield is performed. The efficacy of the developed roll-based transfer printing process is demonstrated by realizing both n-and p-channel silicon NRs based high performance flexible field-effect transistors (Si NR-FETs). The present work opens new avenues for printed high performance integrated circuits.
高迁移率纳米/微尺度结构的均匀和大面积印刷可以实现高性能柔性电子器件，这在许多电子和光电子应用中是非常需要的。在这项工作中，我们报告了一种优化的直接滚转印刷方法，可以将高迁移率硅纳米带(Si NRs)阵列集成在各种柔性衬底上，包括聚酰亚胺，聚对苯二甲酸乙二醇酯和金属箔等。与传统的转移印花相比，所开发的方法不需要使用弹性转移印花。因此，在~2 cm2的印刷面积上，在打印结构的精度(~100nm)和优异的转移率(~95%)方面取得了显著的改进。这些特性对于在大范围内实现统一的设备间性能特性是必不可少的。进一步，研究了作用力对传递屈服的依赖关系。通过实现基于n沟道和p沟道硅nr - fet的高性能柔性场效应晶体管(Si nr - fet)，证明了所开发的基于辊式转移印刷工艺的有效性。本工作为印刷高性能集成电路开辟了新的途径。
{"title":"High performance n-and p-channel flexible transistors using roll printed silicon nanoribbons","authors":"Ayoub Zumeit, A. Dahiya, Adamos Christou, R. Dahiya","doi":"10.1109/fleps53764.2022.9781569","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781569","url":null,"abstract":"Uniform and large-area printing of high mobility nano/microscale structures can enable high-performance flexible electronics, which is much needed in numerous electronic and optoelectronic applications. In this work, we report an optimized direct roll transfer printing method to integrate arrays of high mobility silicon nanoribbon (Si NRs) in a single step on a variety of flexible substrates including polyimide, polyethylene terephthalate, and metal foils, etc. Compared to conventional transfer printing, the developed method does not require the use of elastomeric transfer stamp. In consequence, significant improvements are accomplished in terms of accuracy of printed structures (~100nm) and excellent transfer yield (~95%) over printed area of ~2 cm2. Such features are essential to achieve uniform device-to-device performance characteristics over large areas. Further, the dependency study of the applied force on transfer yield is performed. The efficacy of the developed roll-based transfer printing process is demonstrated by realizing both n-and p-channel silicon NRs based high performance flexible field-effect transistors (Si NR-FETs). The present work opens new avenues for printed high performance integrated circuits.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134171522","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/fleps53764.2022.9781590
K. Srinivasan, T. Muthuramalingam
The automobile industry is currently placing a premium on vehicle electronics and ergonomics in order to meet customer needs and future applications. Due to their fast production rate, flexibility, and complex geometries, flexible printed sensors (FPS) are now frequently suggested in the automotive industry. Flexible sensors with low manufacturing costs and strong formability for seamless cockpit integration may be easily made utilizing screen printing technology. Flexible printed sensors are hence perfect for IME-based infotainment bezels. The IVI bezel can be simply created in two-dimensional or three-dimensional shapes utilizing the IME method in accordance with the ECE21automotive standard. Capacitive sensors printed on a substrate provide a higher sensing performance and can be used in automobile bezels. The purpose of this effort was to design and optimize interdigitated pattern printed Ag electrode flexible sensors for enhanced vehicle infotainment applications. Flexible printed sensors exhibit superior sensing capabilities. With a 15mm overlap and a 0.5mm Electrode width, the capacitance change is greater and the production cost is lower. Because of the superior spatial interpolation, overlap has a stronger effect on sensor performance.
{"title":"Evaluation of Post Thermo Formed Screen Printed Silver Electrode Capacitive Sensor","authors":"K. Srinivasan, T. Muthuramalingam","doi":"10.1109/fleps53764.2022.9781590","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781590","url":null,"abstract":"The automobile industry is currently placing a premium on vehicle electronics and ergonomics in order to meet customer needs and future applications. Due to their fast production rate, flexibility, and complex geometries, flexible printed sensors (FPS) are now frequently suggested in the automotive industry. Flexible sensors with low manufacturing costs and strong formability for seamless cockpit integration may be easily made utilizing screen printing technology. Flexible printed sensors are hence perfect for IME-based infotainment bezels. The IVI bezel can be simply created in two-dimensional or three-dimensional shapes utilizing the IME method in accordance with the ECE21automotive standard. Capacitive sensors printed on a substrate provide a higher sensing performance and can be used in automobile bezels. The purpose of this effort was to design and optimize interdigitated pattern printed Ag electrode flexible sensors for enhanced vehicle infotainment applications. Flexible printed sensors exhibit superior sensing capabilities. With a 15mm overlap and a 0.5mm Electrode width, the capacitance change is greater and the production cost is lower. Because of the superior spatial interpolation, overlap has a stronger effect on sensor performance.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131344612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/fleps53764.2022.9781506
Guanbo Min, G. Khandelwal, A. Dahiya, D. Mulvihill, R. Dahiya
Efficient harvesting of ubiquitous ambient mechanical energy such as body movements, vibrations etc. using nanogenerators (NGs) have attracted considerable interest for the development of energy autonomous electronics. Herein, we present a high-performance textile triboelectric nanogenerators (T-TENGs) in fiber form factor using a Polytetrafluoroethylene (PTFE) film in contact with a Nylon based counter-surface in either nanofiber mat or fabric form (both fixed to conductive fabric electrodes). T-TENG performance is enhanced by performing Argon plasma treatment on the PTFE film. The plasma treated devices show increase in output voltage by a factor of 7.6, while short circuit current increased by a factor of 11.6 (compared to pristine non-plasma treated devices). We also show that the fabricated T-TENG can be used as a self-powered temperature sensor within the 25-90°C range. TENG voltage decreased linearly with increasing temperature exhibiting a sensitivity of -0.85/°C. To the best of our knowledge, this is the first demonstration of a T-TENG based self-powered temperature sensor. These results show the potential of T-TENGs for several applications such as detecting temperature in the human body and in self-powered e-Skin for the gloves of humanoid robots etc.
{"title":"Textile Triboelectric Nanogenerators as Self Powered Wearable Temperature Sensors","authors":"Guanbo Min, G. Khandelwal, A. Dahiya, D. Mulvihill, R. Dahiya","doi":"10.1109/fleps53764.2022.9781506","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781506","url":null,"abstract":"Efficient harvesting of ubiquitous ambient mechanical energy such as body movements, vibrations etc. using nanogenerators (NGs) have attracted considerable interest for the development of energy autonomous electronics. Herein, we present a high-performance textile triboelectric nanogenerators (T-TENGs) in fiber form factor using a Polytetrafluoroethylene (PTFE) film in contact with a Nylon based counter-surface in either nanofiber mat or fabric form (both fixed to conductive fabric electrodes). T-TENG performance is enhanced by performing Argon plasma treatment on the PTFE film. The plasma treated devices show increase in output voltage by a factor of 7.6, while short circuit current increased by a factor of 11.6 (compared to pristine non-plasma treated devices). We also show that the fabricated T-TENG can be used as a self-powered temperature sensor within the 25-90°C range. TENG voltage decreased linearly with increasing temperature exhibiting a sensitivity of -0.85/°C. To the best of our knowledge, this is the first demonstration of a T-TENG based self-powered temperature sensor. These results show the potential of T-TENGs for several applications such as detecting temperature in the human body and in self-powered e-Skin for the gloves of humanoid robots etc.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134291684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/fleps53764.2022.9781507
F. Torricelli, E. Macchia, P. Bollella, C. Di Franco, Z. Kovács-Vajna, G. Scamarcio, L. Torsi
Single-Molecule organic transistors embedding a large-area bioreceptor surface can potentially revolutionize the current medical diagnostic approaches. For instance, sensing a single molecule in a biological fluid can provide early and noninvasive detection of a disease. The development of a reliable and multiplexed electronic large-area single-molecule technology urgently requires the improvement of our current understanding. Here we propose a physical model of large-area single-molecule organic transistor sensors. The model describes the electrical measurements and provides meaningful information about the sensor operation. The bioelectronic responses can be linked to the physical parameters and guidelines for device optimization are suggested.
{"title":"Physical Modelling of Large-Area Single-Molecule Organic Transistors","authors":"F. Torricelli, E. Macchia, P. Bollella, C. Di Franco, Z. Kovács-Vajna, G. Scamarcio, L. Torsi","doi":"10.1109/fleps53764.2022.9781507","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781507","url":null,"abstract":"Single-Molecule organic transistors embedding a large-area bioreceptor surface can potentially revolutionize the current medical diagnostic approaches. For instance, sensing a single molecule in a biological fluid can provide early and noninvasive detection of a disease. The development of a reliable and multiplexed electronic large-area single-molecule technology urgently requires the improvement of our current understanding. Here we propose a physical model of large-area single-molecule organic transistor sensors. The model describes the electrical measurements and provides meaningful information about the sensor operation. The bioelectronic responses can be linked to the physical parameters and guidelines for device optimization are suggested.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123734638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/fleps53764.2022.9781582
M. Mariello, Kangling Wu, Marion von Allmen, M. van Gompel, S. Lacour, Y. Leterrier
We propose and demonstrate a comprehensive method to quantify the ultra-low permeability of thin-film encapsulation coatings engineered for bioelectronic implantable micro-devices. The method relies on the monitoring of the corrosion of magnesium (Mg) thin-film integrated in resistive sensors, on rigid, flexible and stretchable substrates. Corrosion in the Mg film is induced by water diffusion through the coating and is analysed in terms of the evolving electrical resistance; the corrosion rate can next be correlated with the barrier properties, (i.e., the water vapour transmission rate, WVTR) of the encapsulation coating. The ultra-high sensitivity (3.3×10-8 g/m2/day at room temperature) that is achieved with this method is unmet and particularly suitable for ultrathin ultra-high barrier encapsulations of bioelectronic implants. The sensing method is next demonstrated in flexible and stretchable microsystems where the Mg monitoring sensor is integrated into an optimized and reliable microfabrication process.
{"title":"Microfabricated ultra-sensitive permeation sensors for real-time monitoring of compliant implantable bioelectronics","authors":"M. Mariello, Kangling Wu, Marion von Allmen, M. van Gompel, S. Lacour, Y. Leterrier","doi":"10.1109/fleps53764.2022.9781582","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781582","url":null,"abstract":"We propose and demonstrate a comprehensive method to quantify the ultra-low permeability of thin-film encapsulation coatings engineered for bioelectronic implantable micro-devices. The method relies on the monitoring of the corrosion of magnesium (Mg) thin-film integrated in resistive sensors, on rigid, flexible and stretchable substrates. Corrosion in the Mg film is induced by water diffusion through the coating and is analysed in terms of the evolving electrical resistance; the corrosion rate can next be correlated with the barrier properties, (i.e., the water vapour transmission rate, WVTR) of the encapsulation coating. The ultra-high sensitivity (3.3×10-8 g/m2/day at room temperature) that is achieved with this method is unmet and particularly suitable for ultrathin ultra-high barrier encapsulations of bioelectronic implants. The sensing method is next demonstrated in flexible and stretchable microsystems where the Mg monitoring sensor is integrated into an optimized and reliable microfabrication process.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"198 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121746865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/fleps53764.2022.9781551
Laura López-Mir, Alassane Sidibe, Aina López Porta, Enric Pascual Cuenca, Oriol Font Bagüeste, Benjamin Dhuiège, G. Déprès
This paper presents a preliminary study for the construction of an in-mould smart tag as a robust flexible and battery-free label with a radiofrequency energy harvesting sub-system and enhanced geolocation features. The proposed flexible geolocation tag is realized by means of a specific production process applied over printed antennas and hybridized rigid control module. Advanced materials such as highly conductive inks and nanocellulose-based substrates, as well as innovative manufacturing processes covered by the in-mould electronics framework, are investigated. Through simulations and experimental validation, the effect over printed antennas of an over-moulded layer of Thermoplastic Polyurethane (TPU) is explored. Such material due to its dielectric properties and thickness tends to down-shift the resonance frequency of the antenna, favouring miniaturization, but also increases its loss resistance. A 1.25 mm thick TPU was chosen for the final tag to ensure both flexibility and a realized positive gain of +0.7 dBi at 865 MHz. For further development of the tag, materials electrical and dielectric properties must be clearly defined in simulation to correct frequency shifts.
{"title":"Towards In-mould Antennas for Geolocation Tags","authors":"Laura López-Mir, Alassane Sidibe, Aina López Porta, Enric Pascual Cuenca, Oriol Font Bagüeste, Benjamin Dhuiège, G. Déprès","doi":"10.1109/fleps53764.2022.9781551","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781551","url":null,"abstract":"This paper presents a preliminary study for the construction of an in-mould smart tag as a robust flexible and battery-free label with a radiofrequency energy harvesting sub-system and enhanced geolocation features. The proposed flexible geolocation tag is realized by means of a specific production process applied over printed antennas and hybridized rigid control module. Advanced materials such as highly conductive inks and nanocellulose-based substrates, as well as innovative manufacturing processes covered by the in-mould electronics framework, are investigated. Through simulations and experimental validation, the effect over printed antennas of an over-moulded layer of Thermoplastic Polyurethane (TPU) is explored. Such material due to its dielectric properties and thickness tends to down-shift the resonance frequency of the antenna, favouring miniaturization, but also increases its loss resistance. A 1.25 mm thick TPU was chosen for the final tag to ensure both flexibility and a realized positive gain of +0.7 dBi at 865 MHz. For further development of the tag, materials electrical and dielectric properties must be clearly defined in simulation to correct frequency shifts.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121320440","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/fleps53764.2022.9781515
Christian Zajc, Markus Haberler, I. Siegl, G. Holweg, C. Steger
A System-on-Chip (SoC) for Drug-of-Abuse (DoA) testing for Point-Of-Care (POC) is presented. The SoC enables electrochemical measurements on biochemical sensors and provides interface capabilities to rechargeable energy storage elements. An integrated 13.56 MHz contactless interface enables two-way wireless communication and power transfer. Autonomous POC applications with rechargeable energy storage require a power-aware power management to enable measurements from a single charge. This is achieved by a power management that supports different power supply modes in a flexible manner, optimized for the application in POC diagnostics. The SoC consumes 7.9 µA in deep sleep and 3.5 mA in active mode. Power optimizations are investigated and evaluated on a Printed Circuit Board (PCB)-based demonstrator. The obtained results can be applied to POC platforms to increase the power-awareness.
{"title":"Power-Aware System-on-Chip for Point-Of-Care Diagnostic Applications","authors":"Christian Zajc, Markus Haberler, I. Siegl, G. Holweg, C. Steger","doi":"10.1109/fleps53764.2022.9781515","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781515","url":null,"abstract":"A System-on-Chip (SoC) for Drug-of-Abuse (DoA) testing for Point-Of-Care (POC) is presented. The SoC enables electrochemical measurements on biochemical sensors and provides interface capabilities to rechargeable energy storage elements. An integrated 13.56 MHz contactless interface enables two-way wireless communication and power transfer. Autonomous POC applications with rechargeable energy storage require a power-aware power management to enable measurements from a single charge. This is achieved by a power management that supports different power supply modes in a flexible manner, optimized for the application in POC diagnostics. The SoC consumes 7.9 µA in deep sleep and 3.5 mA in active mode. Power optimizations are investigated and evaluated on a Printed Circuit Board (PCB)-based demonstrator. The obtained results can be applied to POC platforms to increase the power-awareness.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114652566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/fleps53764.2022.9781560
Kunj Himanshu Vora, V. Sharov, N. Kordas, K. Seidl
Cell density is an important parameter in the monitoring of biotechnological processes. An inline measurement principle is described based on impedance spectroscopy. The sensor is fabricated by inkjet printing of silver nanoparticle ink on a polyethylene terephthalate substrate. Yeast concentrations ranging from 0.5 g/l – 10 g/l have been measured. The cells were suspended in deionized water and in 0.1 M phosphate buffered saline to observe the effect on the impedance spectra. The impedance measurements were performed between the frequency range of 20 Hz – 1 MHz with an excitation voltage of 10 mV. Measurements in deionized water showed an increase in admittance of 94.6 µΩ-1 per 1 g/l of increase in cell concentration at 10 kHz. The effect of the cell membrane polarization resulting in a change of the capacitance is observable in phosphate buffered saline. The increase in capacitance observed is 360 pF per 1 g/l of increase in cell concentration. Thus, an inline, label-free method for cell-density monitoring is possible. It can be seen that impedance spectroscopy with a flexible sensor is a useful tool to monitor cell density and its relationship with the surrounding medium.
{"title":"Impedance-based cell density measurement with inkjet printed flexible sensor","authors":"Kunj Himanshu Vora, V. Sharov, N. Kordas, K. Seidl","doi":"10.1109/fleps53764.2022.9781560","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781560","url":null,"abstract":"Cell density is an important parameter in the monitoring of biotechnological processes. An inline measurement principle is described based on impedance spectroscopy. The sensor is fabricated by inkjet printing of silver nanoparticle ink on a polyethylene terephthalate substrate. Yeast concentrations ranging from 0.5 g/l – 10 g/l have been measured. The cells were suspended in deionized water and in 0.1 M phosphate buffered saline to observe the effect on the impedance spectra. The impedance measurements were performed between the frequency range of 20 Hz – 1 MHz with an excitation voltage of 10 mV. Measurements in deionized water showed an increase in admittance of 94.6 µΩ-1 per 1 g/l of increase in cell concentration at 10 kHz. The effect of the cell membrane polarization resulting in a change of the capacitance is observable in phosphate buffered saline. The increase in capacitance observed is 360 pF per 1 g/l of increase in cell concentration. Thus, an inline, label-free method for cell-density monitoring is possible. It can be seen that impedance spectroscopy with a flexible sensor is a useful tool to monitor cell density and its relationship with the surrounding medium.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"1998 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128227499","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/fleps53764.2022.9781497
F. C. Gattinara Di Zubiena, L. D’Alvia, Z. Del Prete, E. Palermo
The lack of proprioception in lower limb amputees is a major cause of gait asymmetry, balance issues and risk of falling. Various devices have been proposed to solve these problems, allowing to gather information about the gait cycle and provide the patient with sensory feedback. The static characterization of a novel stretchable strain sensor manufactured through 3D printing will be studied in this study. This sensor will be the sensitive element of a new wearable proprioceptive device for patients with passive lower limb prostheses. For the realization of the sensor, an elastomeric material (Agilus30Clear), printed with the PolyJet methodology, was used for the support while a eutectic Gallium-Indium (eGaIn) metal alloy was used as the deformation sensitive element. Static tests were conducted for studying the behavior of the sensor with respect to strain. The results provided a good response to the stimulus with good repeatability, sensitivity and R2 values.
{"title":"A static characterization of stretchable 3D-printed strain sensor for restoring proprioception in amputees","authors":"F. C. Gattinara Di Zubiena, L. D’Alvia, Z. Del Prete, E. Palermo","doi":"10.1109/fleps53764.2022.9781497","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781497","url":null,"abstract":"The lack of proprioception in lower limb amputees is a major cause of gait asymmetry, balance issues and risk of falling. Various devices have been proposed to solve these problems, allowing to gather information about the gait cycle and provide the patient with sensory feedback. The static characterization of a novel stretchable strain sensor manufactured through 3D printing will be studied in this study. This sensor will be the sensitive element of a new wearable proprioceptive device for patients with passive lower limb prostheses. For the realization of the sensor, an elastomeric material (Agilus30Clear), printed with the PolyJet methodology, was used for the support while a eutectic Gallium-Indium (eGaIn) metal alloy was used as the deformation sensitive element. Static tests were conducted for studying the behavior of the sensor with respect to strain. The results provided a good response to the stimulus with good repeatability, sensitivity and R2 values.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130594861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-10DOI: 10.1109/fleps53764.2022.9781537
Mindaugas Ilickas, R. Mardosaitė, B. Abakevičienė, S. Račkauskas
ZnO nanowires are often used for UV sensing, however in order to obtain high performance a complicated multistep process for preparation together with high measurement temperatures are used. In this work we demonstrate a facile one-step spray-coating method for the preparation of UV sensors based on ZnO tetrapod (ZnO-T) structure, demonstrating both high response (on/off) and fast rise-decay times at room temperature. Such UV sensors could be in principle deposited on any substrates; therefore this method could be used for flexible UV sensor preparation.
{"title":"Room temperature ZnO nanowire UV sensors by spray-coating","authors":"Mindaugas Ilickas, R. Mardosaitė, B. Abakevičienė, S. Račkauskas","doi":"10.1109/fleps53764.2022.9781537","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781537","url":null,"abstract":"ZnO nanowires are often used for UV sensing, however in order to obtain high performance a complicated multistep process for preparation together with high measurement temperatures are used. In this work we demonstrate a facile one-step spray-coating method for the preparation of UV sensors based on ZnO tetrapod (ZnO-T) structure, demonstrating both high response (on/off) and fast rise-decay times at room temperature. Such UV sensors could be in principle deposited on any substrates; therefore this method could be used for flexible UV sensor preparation.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125983027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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