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/fleps53764.2022.9781511
M. Panahi, S. Masihi, A. Hanson, J. R. Rodriguez-Labra, A. Masihi, D. Maddipatla, B. B. Narakathu, D. Lawson, M. Atashbar
This work presents the development of a fully functional prototype of a wearable smart shoe insole that can monitor arterial oxygen saturation (SpO2) levels at the foot of a diabetic patient using photoplethysmography (PPG) signals. Continuous monitoring of SpO2 levels in diabetic foot ulcer (DFU) patients can provide critical information on the severity of the ulcer, the wound healing process, and the possible need for oxygenation of the wound bed. The developed oximetry system seamlessly integrates the internet of things (IoT) via a custom developed Android mobile application, thus enabling "at-home" monitoring. Fifteen healthy subjects were tested, and the insole oximeter was able to successfully estimate SpO2 levels at the toe. An average error of ≈ 2.8% was calculated for the measured/estimated SpO2 levels at the subjects’ toe when compared to a reference oximeter attached to the finger. In people suffering from chronic DFU wounds, measuring and ensuring appropriate oxygen levels at the foot is critically important for healing the ulcer’s cells/tissues. The fabrication process of the system, details of the PPG tests and analysis of the obtained results are presented and reported in this paper.
{"title":"A Smart Wearable Oximeter Insole for Monitoring SpO2 Levels of Diabetics’ Foot Ulcer","authors":"M. Panahi, S. Masihi, A. Hanson, J. R. Rodriguez-Labra, A. Masihi, D. Maddipatla, B. B. Narakathu, D. Lawson, M. Atashbar","doi":"10.1109/fleps53764.2022.9781511","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781511","url":null,"abstract":"This work presents the development of a fully functional prototype of a wearable smart shoe insole that can monitor arterial oxygen saturation (SpO2) levels at the foot of a diabetic patient using photoplethysmography (PPG) signals. Continuous monitoring of SpO2 levels in diabetic foot ulcer (DFU) patients can provide critical information on the severity of the ulcer, the wound healing process, and the possible need for oxygenation of the wound bed. The developed oximetry system seamlessly integrates the internet of things (IoT) via a custom developed Android mobile application, thus enabling \"at-home\" monitoring. Fifteen healthy subjects were tested, and the insole oximeter was able to successfully estimate SpO2 levels at the toe. An average error of ≈ 2.8% was calculated for the measured/estimated SpO2 levels at the subjects’ toe when compared to a reference oximeter attached to the finger. In people suffering from chronic DFU wounds, measuring and ensuring appropriate oxygen levels at the foot is critically important for healing the ulcer’s cells/tissues. The fabrication process of the system, details of the PPG tests and analysis of the obtained results are presented and reported in this paper.","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":"129599412","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/fleps53764.2022.9781578
N. Pavithra, Srishti Johri, Radhika Varshney, Praveen C Ramamurthy
Summary Dopamine is a catecholamine that is an essential neurotransmitter in the human body. Thus, even a minute variation in its concentration and metabolism leads to severe neurological damage or diseases such as Parkinson’s, Alzheimer’s, Schizophrenia, and many more. It could be prevented at some scale by early detection. Nanoparticles have a remarkable ability to be used in sensors for detection purposes. This study synthesized copper oxide nanoparticles by green synthesis (P-Cu2O NPs) with Artemisia absinthium leaf extract for dopamine detection, accompanied by the enzyme tyrosinase used as a sensing material. The structural characterization of the nanoparticles and its interaction with dopamine via fluorescence spectroscopy was carried out to determine the sensitivity. The combination (P-Cu2O + tyrosinase) showed selective response to dopamine and did not show any response to interfering analyte like ascorbic acid, cysteine, and tyrosine. The limit of detection (LOD) of dopamine is observed to be 5 µM. This study indicates that P-Cu2O + tyrosinase can be a fluorescent probe in detecting dopamine.
{"title":"Dopamine fluorescent sensor based on green synthesized copper oxide nanoparticles and tyrosinase","authors":"N. Pavithra, Srishti Johri, Radhika Varshney, Praveen C Ramamurthy","doi":"10.1109/fleps53764.2022.9781578","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781578","url":null,"abstract":"Summary Dopamine is a catecholamine that is an essential neurotransmitter in the human body. Thus, even a minute variation in its concentration and metabolism leads to severe neurological damage or diseases such as Parkinson’s, Alzheimer’s, Schizophrenia, and many more. It could be prevented at some scale by early detection. Nanoparticles have a remarkable ability to be used in sensors for detection purposes. This study synthesized copper oxide nanoparticles by green synthesis (P-Cu2O NPs) with Artemisia absinthium leaf extract for dopamine detection, accompanied by the enzyme tyrosinase used as a sensing material. The structural characterization of the nanoparticles and its interaction with dopamine via fluorescence spectroscopy was carried out to determine the sensitivity. The combination (P-Cu2O + tyrosinase) showed selective response to dopamine and did not show any response to interfering analyte like ascorbic acid, cysteine, and tyrosine. The limit of detection (LOD) of dopamine is observed to be 5 µM. This study indicates that P-Cu2O + tyrosinase can be a fluorescent probe in detecting dopamine.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"82 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":"131394533","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/fleps53764.2022.9781509
Lukas Rauter, Johanna Zikulnig, T. Moldaschl, D. Holzmann, H. Zangl, L. Faller, J. Kosel
This paper presents a fully printed wireless humidity sensor for structural health monitoring in smart lightweight construction parts. The sensor concept aims for sustainability and minimalism, fabricated by inkjet printing on uncoated paper substrate, working without the use of a battery or a chip. Measurement results show a wireless operation over a distance of 3mm, a sensitivity of 4.16 kHz per °C with a linear response and small hysteresis.
{"title":"Printed wireless battery-free humidity sensor for integration into lightweight construction parts","authors":"Lukas Rauter, Johanna Zikulnig, T. Moldaschl, D. Holzmann, H. Zangl, L. Faller, J. Kosel","doi":"10.1109/fleps53764.2022.9781509","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781509","url":null,"abstract":"This paper presents a fully printed wireless humidity sensor for structural health monitoring in smart lightweight construction parts. The sensor concept aims for sustainability and minimalism, fabricated by inkjet printing on uncoated paper substrate, working without the use of a battery or a chip. Measurement results show a wireless operation over a distance of 3mm, a sensitivity of 4.16 kHz per °C with a linear response and small hysteresis.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"43 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":"128187179","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/fleps53764.2022.9781496
Akshaya Kumar Aliyana, Aiswarya Baburaj, H. M. Jalajamony, N. Kumar S. K., R. Dahiya, Renny Edwin Fernadez
This work reports the impact of analyte pH conditions on the sensitivity of the Ammonium (${text{N}}{{text{H}}_4}^ + $) sensor. The ${text{N}}{{text{H}}_4}^ + $ sensor was developed by screen printing an IDE structure and subsequently modified with multiwalled carbon nanotube (MWCNT) and Zinc Oxide (ZnO) nanocomposite active layer on a fiber epoxy substrate. The sensor impedance response was studied for the varying ${text{N}}{{text{H}}_4}^ + $ analyte pH levels, and device sensitivity was found to decrease with increased analyte pH concentrations (pH 4 - pH 9). The maximum impedance of the sensor operated at pH 4 was ~ 10.5% higher when performed at pH 9. The outcome demonstrates that the presented study could open new opportunities to develop highly sensitive nutrient sensors based on tuning of the analyte pH conditions. Alternately the study highlights the need for maintaining analyte pH conditions for the stable and reliable response of the flexible ammonium sensor.
{"title":"Impact of Analyte pH on the Sensitivity of Screen-Printed Flexible Ammonium Sensor","authors":"Akshaya Kumar Aliyana, Aiswarya Baburaj, H. M. Jalajamony, N. Kumar S. K., R. Dahiya, Renny Edwin Fernadez","doi":"10.1109/fleps53764.2022.9781496","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781496","url":null,"abstract":"This work reports the impact of analyte pH conditions on the sensitivity of the Ammonium (${text{N}}{{text{H}}_4}^ + $) sensor. The ${text{N}}{{text{H}}_4}^ + $ sensor was developed by screen printing an IDE structure and subsequently modified with multiwalled carbon nanotube (MWCNT) and Zinc Oxide (ZnO) nanocomposite active layer on a fiber epoxy substrate. The sensor impedance response was studied for the varying ${text{N}}{{text{H}}_4}^ + $ analyte pH levels, and device sensitivity was found to decrease with increased analyte pH concentrations (pH 4 - pH 9). The maximum impedance of the sensor operated at pH 4 was ~ 10.5% higher when performed at pH 9. The outcome demonstrates that the presented study could open new opportunities to develop highly sensitive nutrient sensors based on tuning of the analyte pH conditions. Alternately the study highlights the need for maintaining analyte pH conditions for the stable and reliable response of the flexible ammonium sensor.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"2012 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":"128121314","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/fleps53764.2022.9781527
M. S. Baghini, R. Dahiya
Tunneling based piezoresistive sensors are often utilized for dynamic pressure sensing due to their low cost, ease of fabrication, ability to be printed and integrated with read-out modules. These devices can be subsequently integrated with transistors, actuators and other components towards the development of multifunctional electronic skin (e-Skin), where it is important that sensors exhibit uniform and replicable behavior. This can also help to minimize the need for compensation circuits during long-term use. In this study, direct ink writing of custommade low viscosity graphite ink is used to develop soft piezoresistive pressure sensors. The uniformity of the devices is gauged via the base conductivity and piezoresistive response, both of which exhibit a very good coefficient of variation of 2.21% and 7.1%, respectively. Furthermore, the sensors are sensitive to a wide range of forces from 0-7 N (~3.2 MPa maximum pressure). These devices pave the way towards efficient integration of pressure sensors for object grasping and manipulation due to their small size and bendability.
{"title":"Direct ink writing of tunnelling graphite based soft piezoresistive pressure sensors","authors":"M. S. Baghini, R. Dahiya","doi":"10.1109/fleps53764.2022.9781527","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781527","url":null,"abstract":"Tunneling based piezoresistive sensors are often utilized for dynamic pressure sensing due to their low cost, ease of fabrication, ability to be printed and integrated with read-out modules. These devices can be subsequently integrated with transistors, actuators and other components towards the development of multifunctional electronic skin (e-Skin), where it is important that sensors exhibit uniform and replicable behavior. This can also help to minimize the need for compensation circuits during long-term use. In this study, direct ink writing of custommade low viscosity graphite ink is used to develop soft piezoresistive pressure sensors. The uniformity of the devices is gauged via the base conductivity and piezoresistive response, both of which exhibit a very good coefficient of variation of 2.21% and 7.1%, respectively. Furthermore, the sensors are sensitive to a wide range of forces from 0-7 N (~3.2 MPa maximum pressure). These devices pave the way towards efficient integration of pressure sensors for object grasping and manipulation due to their small size and bendability.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"51 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":"117313016","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/fleps53764.2022.9781494
Ariba Siddiqui, Kamalesh Tripathy, M. Bhattacharjee
Biomedical implants, considered as a remarkable breakthrough in the field of medical science has been evolving gradually over the past few decades. However, charging them through batteries is a major issue due to their short lifespan and bulky nature. Therefore, to eliminate the use of batteries Ultrasonic Power Transmission (UPT) technology is perceived as the ideal technique for charging implants. This paper proposes an optimum computational model of the UPT system employing PVDF (polyvinylidene fluoride) based transducer. It was simulated at an optimum frequency of 900 kHz that resulted in an acoustic pressure of 218 Pa at the transmitting end. At a depth of 3 cm, the simulated model is able to generate a maximum output voltage of 0.13 volts and an energy density of 4.21 µJ/m3 at the receiver output. The proposed UPT model on a PVDF (polyvinylidene fluoride) substrate facilitates higher flexibility, superior biocompatibility with light-weight structure and stable mechanical property.
{"title":"Ultrasonic Power Transfer in Biomedical Implants using Flexible Transducer","authors":"Ariba Siddiqui, Kamalesh Tripathy, M. Bhattacharjee","doi":"10.1109/fleps53764.2022.9781494","DOIUrl":"https://doi.org/10.1109/fleps53764.2022.9781494","url":null,"abstract":"Biomedical implants, considered as a remarkable breakthrough in the field of medical science has been evolving gradually over the past few decades. However, charging them through batteries is a major issue due to their short lifespan and bulky nature. Therefore, to eliminate the use of batteries Ultrasonic Power Transmission (UPT) technology is perceived as the ideal technique for charging implants. This paper proposes an optimum computational model of the UPT system employing PVDF (polyvinylidene fluoride) based transducer. It was simulated at an optimum frequency of 900 kHz that resulted in an acoustic pressure of 218 Pa at the transmitting end. At a depth of 3 cm, the simulated model is able to generate a maximum output voltage of 0.13 volts and an energy density of 4.21 µJ/m3 at the receiver output. The proposed UPT model on a PVDF (polyvinylidene fluoride) substrate facilitates higher flexibility, superior biocompatibility with light-weight structure and stable mechanical property.","PeriodicalId":221424,"journal":{"name":"2022 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"22 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":"121642601","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：