Pub Date : 2020-08-16DOI: 10.1109/fleps49123.2020.9239483
{"title":"FLEPS 2020 Table of contents","authors":"","doi":"10.1109/fleps49123.2020.9239483","DOIUrl":"https://doi.org/10.1109/fleps49123.2020.9239483","url":null,"abstract":"","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121117220","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239593
A. Pouryazdan, Júlio C. Costa, Pasindu Lugoda, R. Prance, H. Prance, N. Münzenrieder
Non-contact imaging of electric potentials with micro-metre resolution can provide relevant insights in material characterisation, electrostatic charge imaging and bio-sensing applications. However, scanning electric potential microscopes have been confined to rigid and single-probe devices, making them slow, prone to mechanical damage and complex to fabricate. In this work, we present a novel 5-element flexible array of electric potential probes with spatial resolution down to $20 mu mathrm{m}$ which reduces the scanning time by a factor of 5 when compared to a single probe device. This was achieved by combining flexible thin-film probes for active guarding and shielding with state-of-the art discrete conditioning circuits. The potential of this approach is showcased by using the fabricated array to image latent fingerprints deposited on an insulating surface by contact electrification. This is the first example of a micro-scale array of electric potential sensors.
具有微米分辨率的非接触式电位成像可以为材料表征、静电电荷成像和生物传感应用提供相关见解。然而，扫描电位显微镜一直局限于刚性和单探针设备，使它们速度慢，容易机械损坏，制造复杂。在这项工作中，我们提出了一种新型的5元柔性电位探针阵列，其空间分辨率低至$20 mu mathm {m}$，与单个探针设备相比，扫描时间减少了5倍。这是通过将用于主动保护和屏蔽的柔性薄膜探头与最先进的离散调理电路相结合来实现的。利用所制备的阵列，通过接触通电对沉积在绝缘表面上的潜在指纹进行成像，展示了这种方法的潜力。这是微型电位传感器阵列的第一个例子。
{"title":"Flexible Micro-Scale Sensor Array for Non-Contact Electric Potential Imaging","authors":"A. Pouryazdan, Júlio C. Costa, Pasindu Lugoda, R. Prance, H. Prance, N. Münzenrieder","doi":"10.1109/FLEPS49123.2020.9239593","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239593","url":null,"abstract":"Non-contact imaging of electric potentials with micro-metre resolution can provide relevant insights in material characterisation, electrostatic charge imaging and bio-sensing applications. However, scanning electric potential microscopes have been confined to rigid and single-probe devices, making them slow, prone to mechanical damage and complex to fabricate. In this work, we present a novel 5-element flexible array of electric potential probes with spatial resolution down to $20 mu mathrm{m}$ which reduces the scanning time by a factor of 5 when compared to a single probe device. This was achieved by combining flexible thin-film probes for active guarding and shielding with state-of-the art discrete conditioning circuits. The potential of this approach is showcased by using the fabricated array to image latent fingerprints deposited on an insulating surface by contact electrification. This is the first example of a micro-scale array of electric potential sensors.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129552369","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239445
S. Fairclough, C. Giannetti, Isabel Wagner, H. Shakeel
In this study, we utilized low cost and easily available bubble wrap, homemade indicator solution (cabbage juice), and custom built mobile app based on color detection to find pH values of common liquid samples. We studied two common color definition models i.e. the Red, Green, Blue (RGB) and Hue, Saturation, and Light (HSL) to extract pH values of eight different liquids upon color change after reaction with cabbage juice. Our results show that the HSL based color definition model performs better than the RGB model for both calibration liquids (vinegar with pH=3 and bicarbonate soda pH=9) and eight target liquids with the pH range spanning from 2 to 13.
{"title":"Colorimetric sensor for pH monitoring of liquid samples using bubble wrap and mobile phone camera","authors":"S. Fairclough, C. Giannetti, Isabel Wagner, H. Shakeel","doi":"10.1109/FLEPS49123.2020.9239445","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239445","url":null,"abstract":"In this study, we utilized low cost and easily available bubble wrap, homemade indicator solution (cabbage juice), and custom built mobile app based on color detection to find pH values of common liquid samples. We studied two common color definition models i.e. the Red, Green, Blue (RGB) and Hue, Saturation, and Light (HSL) to extract pH values of eight different liquids upon color change after reaction with cabbage juice. Our results show that the HSL based color definition model performs better than the RGB model for both calibration liquids (vinegar with pH=3 and bicarbonate soda pH=9) and eight target liquids with the pH range spanning from 2 to 13.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133949591","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239490
Laxmeesha Somappa, Shahid Malik, Meraj Ahmad, Khan Mohammad Ehshan, Aatha Mohin Shaikh, Khan Mohammad Anas, S. Sonkusale, M. Baghini
In this paper a simple and low-cost 3D printed robotic finger is presented. The 3D printed finger is embedded with a low-cost flexible piezoresistive polymer for sensing pressure and a thread-based carbon coated strain sensor for tracking the bending of the finger. The fingers are 3D printed with fused deposition modeling (FDM) printers using polymer composites thereby enabling low cost, high speed and simplicity. Design of a single such 3D printed finger is discussed and results are shown for the embedded pressure and strain sensors using a simple highly linear analog readout circuit.
{"title":"A 3D Printed Robotic Finger with Embedded Tactile Pressure and Strain Sensor","authors":"Laxmeesha Somappa, Shahid Malik, Meraj Ahmad, Khan Mohammad Ehshan, Aatha Mohin Shaikh, Khan Mohammad Anas, S. Sonkusale, M. Baghini","doi":"10.1109/FLEPS49123.2020.9239490","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239490","url":null,"abstract":"In this paper a simple and low-cost 3D printed robotic finger is presented. The 3D printed finger is embedded with a low-cost flexible piezoresistive polymer for sensing pressure and a thread-based carbon coated strain sensor for tracking the bending of the finger. The fingers are 3D printed with fused deposition modeling (FDM) printers using polymer composites thereby enabling low cost, high speed and simplicity. Design of a single such 3D printed finger is discussed and results are shown for the embedded pressure and strain sensors using a simple highly linear analog readout circuit.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134253599","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239485
A. Dahiya, R. Dahiya
Low-temperature processable hybrid organic/inorganic based electronic devices, such as field-effect transistors (FETs), micro/nano energy generators, photodetectors, etc. offer practical solutions towards realizing low-cost, flexible self-powered autonomous systems. This work presents the method for ‘direct’ integration of inorganic ZnO nanostructures onto flexible polymeric substrates by growing directly the nanowires (NWs) using hydrothermal growth process. In addition, the ‘indirect’ integration is demonstrated by transferring high temperature grown ZnO nanosheets (NSs) using mechanical shear force alignment technique. The potential of each integration approaches has been demonstrated by fabricating organic / inorganic hybrid electronic devices over flexible polymeric substrates.
{"title":"Synthesis of Multi-functional ZnO Nanomaterials on Flexible Substrates for Flexible Electronics","authors":"A. Dahiya, R. Dahiya","doi":"10.1109/FLEPS49123.2020.9239485","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239485","url":null,"abstract":"Low-temperature processable hybrid organic/inorganic based electronic devices, such as field-effect transistors (FETs), micro/nano energy generators, photodetectors, etc. offer practical solutions towards realizing low-cost, flexible self-powered autonomous systems. This work presents the method for ‘direct’ integration of inorganic ZnO nanostructures onto flexible polymeric substrates by growing directly the nanowires (NWs) using hydrothermal growth process. In addition, the ‘indirect’ integration is demonstrated by transferring high temperature grown ZnO nanosheets (NSs) using mechanical shear force alignment technique. The potential of each integration approaches has been demonstrated by fabricating organic / inorganic hybrid electronic devices over flexible polymeric substrates.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122859907","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239439
M. Panahi, S. Masihi, D. Maddipatla, A. K. Bose, Sajjad Hajian, A. Hanson, V. Palaniappan, B. B. Narakathu, B. Bazuin, M. Atashbar
A fabric based porous polydimethylsiloxane (PDMS) pressure sensor was developed and the effect of curing temperature on the porosity as well as the sensitivity was investigated. Three different porous PDMS dielectric layers (D1, D2 and D3) were prepared by curing a mixture of PDMS, sodium hydrogen bicarbonate (NaHCO3), and nitric acid (HNO3) at 110 $^{circ}C$, 140$^{circ}C$ and 170$^{circ}C$, respectively. The top and bottom electrodes of the pressure sensor were fabricated by screen printing silver (Ag) on a thermoplastic polyurethane (TPU) film. The screen-printed Ag-TPU film was permanently attached to a fabric using heat lamination process. Three pressure sensors, PS1, PS2 and PS3 were assembled by sandwiching the porous dielectric layers D1, D2 and D3 between the top and bottom electrodes, respectively. An average pore size of $411 mu mathrm{m}, 496 mu mathrm{m}$, and $502 mu mathrm{m}$ was measured for D1, D2 and D3, respectively. A relative capacitance change of $sim 100$%, $sim$ 323%, and $sim$ 485% was obtained for the pressure sensors PS1, PS2, PS3, respectively, for varying applied pressures ranging from 0 to 1000 kPa. The effect of curing temperatures on the thickness as well as the dielectric constant of the porous PDMS layer, which in turn changes the sensitivity of the pressure sensors, was investigated and is presented in this paper.
研制了一种基于织物的多孔聚二甲基硅氧烷(PDMS)压力传感器，研究了固化温度对其孔隙率和灵敏度的影响。将PDMS、碳酸氢钠(NaHCO3)和硝酸(HNO3)的混合物分别固化在110 $^{circ}C$、140 $^{circ}C$和170 $^{circ}C$的温度下，制备了3种不同多孔PDMS介电层D1、D2和D3。压力传感器的上电极和下电极是在热塑性聚氨酯(TPU)薄膜上丝网印刷银(Ag)制成的。丝网印刷Ag-TPU薄膜使用热层压工艺永久附着在织物上。将多孔介质层D1、D2和D3分别夹在上下电极之间，组装了3个压力传感器PS1、PS2和PS3。D1、D2和D3的平均孔径分别为$411 mu mathrm{m}, 496 mu mathrm{m}$和$502 mu mathrm{m}$。的相对电容变化 $sim 100$%, $sim$ 323%, and $sim$ 485% was obtained for the pressure sensors PS1, PS2, PS3, respectively, for varying applied pressures ranging from 0 to 1000 kPa. The effect of curing temperatures on the thickness as well as the dielectric constant of the porous PDMS layer, which in turn changes the sensitivity of the pressure sensors, was investigated and is presented in this paper.
{"title":"Investigation of Temperature Effect on the Porosity of a Fabric Based Porous Capacitive Pressure Sensor","authors":"M. Panahi, S. Masihi, D. Maddipatla, A. K. Bose, Sajjad Hajian, A. Hanson, V. Palaniappan, B. B. Narakathu, B. Bazuin, M. Atashbar","doi":"10.1109/FLEPS49123.2020.9239439","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239439","url":null,"abstract":"A fabric based porous polydimethylsiloxane (PDMS) pressure sensor was developed and the effect of curing temperature on the porosity as well as the sensitivity was investigated. Three different porous PDMS dielectric layers (D1, D2 and D3) were prepared by curing a mixture of PDMS, sodium hydrogen bicarbonate (NaHCO3), and nitric acid (HNO3) at 110 $^{circ}C$, 140$^{circ}C$ and 170$^{circ}C$, respectively. The top and bottom electrodes of the pressure sensor were fabricated by screen printing silver (Ag) on a thermoplastic polyurethane (TPU) film. The screen-printed Ag-TPU film was permanently attached to a fabric using heat lamination process. Three pressure sensors, PS1, PS2 and PS3 were assembled by sandwiching the porous dielectric layers D1, D2 and D3 between the top and bottom electrodes, respectively. An average pore size of $411 mu mathrm{m}, 496 mu mathrm{m}$, and $502 mu mathrm{m}$ was measured for D1, D2 and D3, respectively. A relative capacitance change of $sim 100$%, $sim$ 323%, and $sim$ 485% was obtained for the pressure sensors PS1, PS2, PS3, respectively, for varying applied pressures ranging from 0 to 1000 kPa. The effect of curing temperatures on the thickness as well as the dielectric constant of the porous PDMS layer, which in turn changes the sensitivity of the pressure sensors, was investigated and is presented in this paper.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130252130","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239447
V. Palaniappan, D. Maddipatla, M. Panahi, S. Masihi, A. K. Bose, X. Zhang, Sajjad Hajian, B. B. Narakathu, B. Bazuin, M. Atashbar
A novel flexible capacitive pressure sensor based on hybrid micro-structured (HM) polydimethylsiloxane (PDMS) dielectric layer was developed. The HM-PDMS with M-tooth structured patterns was fabricated using laser engraved acrylic master mold. The top and bottom electrodes were fabricated by depositing silver (Ag) on flexible (polyethylene terephthalate) PET substrate using additive screen printing. The pressure sensor was assembled by sandwiching two HMPDMS based dielectric layer between the top and bottom electrodes. The performance of HM-PDMS based pressure sensor was demonstrated by subjecting the sensor to varying applied pressures ranging from 0 to 100 Pa, and 1 kPa to 10 kPa. A sensitivity of 0.14% Pa$^{-1}$, and 0.02% Pa$^{-1}$ was obtained for the fabricated pressure sensor for the pressure ranges 0-100 Pa, and 1 to 10 kPa, respectively.
{"title":"Highly Sensitive and Flexible M-Tooth Based Hybrid Micro-Structured Capacitive Pressure Sensor","authors":"V. Palaniappan, D. Maddipatla, M. Panahi, S. Masihi, A. K. Bose, X. Zhang, Sajjad Hajian, B. B. Narakathu, B. Bazuin, M. Atashbar","doi":"10.1109/FLEPS49123.2020.9239447","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239447","url":null,"abstract":"A novel flexible capacitive pressure sensor based on hybrid micro-structured (HM) polydimethylsiloxane (PDMS) dielectric layer was developed. The HM-PDMS with M-tooth structured patterns was fabricated using laser engraved acrylic master mold. The top and bottom electrodes were fabricated by depositing silver (Ag) on flexible (polyethylene terephthalate) PET substrate using additive screen printing. The pressure sensor was assembled by sandwiching two HMPDMS based dielectric layer between the top and bottom electrodes. The performance of HM-PDMS based pressure sensor was demonstrated by subjecting the sensor to varying applied pressures ranging from 0 to 100 Pa, and 1 kPa to 10 kPa. A sensitivity of 0.14% Pa$^{-1}$, and 0.02% Pa$^{-1}$ was obtained for the fabricated pressure sensor for the pressure ranges 0-100 Pa, and 1 to 10 kPa, respectively.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126411820","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239554
Marc Martínez-Estrada, R. Fernández-García, I. Gil
In this work, a wearable system to detect urine leakage based on a textile sensor is proposed. The system consists of a capacitive sensor embroidered with a conductive yarn in a cotton/polyester substrate. A microcontroller (MCU) with a wireless module for signal acquisition and a smartphone for monitoring complete the overall system. The capacitive sensor behaviour was tested in a climatic chamber between 30 % and 80% of relative humidity (RH) with a LCR meter and charge/discharge method directly connected to the MCU. The results show that the proposed system is able to detect urine leakage even though when the patient wears a diaper. The functionally allows to develop a real time monitoring system which can help nursing and medical assistants to take care of elderly and disabled people and improve the quality of life of these patients.
{"title":"A wearable system to detect urine leakage based on a textile sensor.","authors":"Marc Martínez-Estrada, R. Fernández-García, I. Gil","doi":"10.1109/FLEPS49123.2020.9239554","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239554","url":null,"abstract":"In this work, a wearable system to detect urine leakage based on a textile sensor is proposed. The system consists of a capacitive sensor embroidered with a conductive yarn in a cotton/polyester substrate. A microcontroller (MCU) with a wireless module for signal acquisition and a smartphone for monitoring complete the overall system. The capacitive sensor behaviour was tested in a climatic chamber between 30 % and 80% of relative humidity (RH) with a LCR meter and charge/discharge method directly connected to the MCU. The results show that the proposed system is able to detect urine leakage even though when the patient wears a diaper. The functionally allows to develop a real time monitoring system which can help nursing and medical assistants to take care of elderly and disabled people and improve the quality of life of these patients.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131466966","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239436
A. J. Fernandes, Y. Ono, E. Ukwatta
Ultrasound imaging technology has recently been proven to achieve higher classification accuracies than surface electromyography when predicting hand motions. However, typical designs involve a large linear array ultrasonic probe or bulky multichannel ultrasonic transducers. In this study, we constructed wearable ultrasonic sensors (WUS) using 110$-mu$m thick flexible piezoelectric polymer film for an ergonomic strategy for prosthetic and human machine interface applications. We attached the three WUSs on the forearm of a healthy subject, 5 cm away from the wrist, to monitor the tissue motions associated with the finger flexions. An experiment to predict 100 ms time intervals of individual finger flexions was investigated using novel feature extraction methods involving the discrete wavelet transform. We achieved an accuracy of 92.5±7.6% for classification of finger flexions using a multilayer perceptron with a hidden layer of 15 nodes. The F1 score for classifying the five fingers ranged between 86-99% across all fingers using uniformly distributed class sample sizes. The results strongly support the utility of the ergonomic WUS system for continuously predicting individual finger flexions in prosthetic and human machine interface applications.
{"title":"Flexible and Wearable Ultrasonic Sensors and Method for Classifying Individual Finger Flexions","authors":"A. J. Fernandes, Y. Ono, E. Ukwatta","doi":"10.1109/FLEPS49123.2020.9239436","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239436","url":null,"abstract":"Ultrasound imaging technology has recently been proven to achieve higher classification accuracies than surface electromyography when predicting hand motions. However, typical designs involve a large linear array ultrasonic probe or bulky multichannel ultrasonic transducers. In this study, we constructed wearable ultrasonic sensors (WUS) using 110$-mu$m thick flexible piezoelectric polymer film for an ergonomic strategy for prosthetic and human machine interface applications. We attached the three WUSs on the forearm of a healthy subject, 5 cm away from the wrist, to monitor the tissue motions associated with the finger flexions. An experiment to predict 100 ms time intervals of individual finger flexions was investigated using novel feature extraction methods involving the discrete wavelet transform. We achieved an accuracy of 92.5±7.6% for classification of finger flexions using a multilayer perceptron with a hidden layer of 15 nodes. The F1 score for classifying the five fingers ranged between 86-99% across all fingers using uniformly distributed class sample sizes. The results strongly support the utility of the ergonomic WUS system for continuously predicting individual finger flexions in prosthetic and human machine interface applications.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133837345","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 : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239514
Saoirse Dervin, Ammara Ejaz, R. Dahiya
A low-cost, sustainable and sensitive method for the continuous detection and quantification of Tyrosine (Tyr), a valuable metabolic biomarker, in biological fluids would present a valuable platform to aid patients and medical personnel in dietary management and the diagnosis and monitoring of metabolic and neurodegenerative disease. This work, therefore, presents a facile approach for the development of a graphene oxide (GO) - chitosan (CS) screen-printed carbon electrode (SPCE) (GO-CS/SPCE) on a flexible polyvinyl chloride (PVC) substrate, for the electrochemical detection of Tyr. The low-cost, disposable sensor was achieved by successfully immobilizing a homogenous GO-CS film at the surface of the SPCE via a simple ultrasound-assisted chemical reaction strategy. GO-CS was chosen as the sensitive nanocomposite film due to excellent electrochemical sensing properties, as well as the cost-effective, disposable and biocompatible nature of these nanomaterials. The GO-CS/SPCE demonstrated a wide linear range of 30-500 $mu M$ with a sensitivity of 0.03 $mu Amu M^{-1}$ and good reproducibility, highlighting the potential of GO-CS/SPCE as a low-cost, disposable and practical sensor for Tyr point of care (POC) testing.
一种低成本、可持续和灵敏的方法来连续检测和定量生物体液中宝贵的代谢生物标志物酪氨酸(Tyr)，将为帮助患者和医务人员进行饮食管理以及代谢性和神经退行性疾病的诊断和监测提供一个有价值的平台。因此，本研究为在柔性聚氯乙烯(PVC)衬底上开发氧化石墨烯(GO) -壳聚糖(CS)丝网印刷碳电极(SPCE) (GO-CS/SPCE)提供了一种简便的方法，用于Tyr的电化学检测。这种低成本的一次性传感器是通过简单的超声辅助化学反应策略成功地将一层均质GO-CS膜固定在SPCE表面而实现的。考虑到GO-CS优异的电化学传感性能，以及这些纳米材料的成本效益、一次性和生物相容性，我们选择GO-CS作为敏感纳米复合膜。GO-CS/SPCE具有30-500 $mu M$的宽线性范围，灵敏度为0.03 $mu a mu M^{-1}$，重现性好，突出了GO-CS/SPCE作为低成本、一次性和实用的Tyr护理点(POC)检测传感器的潜力。
{"title":"A low-cost, disposable GO-CS screen printed carbon electrode for electrochemical detection of tyrosine","authors":"Saoirse Dervin, Ammara Ejaz, R. Dahiya","doi":"10.1109/FLEPS49123.2020.9239514","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239514","url":null,"abstract":"A low-cost, sustainable and sensitive method for the continuous detection and quantification of Tyrosine (Tyr), a valuable metabolic biomarker, in biological fluids would present a valuable platform to aid patients and medical personnel in dietary management and the diagnosis and monitoring of metabolic and neurodegenerative disease. This work, therefore, presents a facile approach for the development of a graphene oxide (GO) - chitosan (CS) screen-printed carbon electrode (SPCE) (GO-CS/SPCE) on a flexible polyvinyl chloride (PVC) substrate, for the electrochemical detection of Tyr. The low-cost, disposable sensor was achieved by successfully immobilizing a homogenous GO-CS film at the surface of the SPCE via a simple ultrasound-assisted chemical reaction strategy. GO-CS was chosen as the sensitive nanocomposite film due to excellent electrochemical sensing properties, as well as the cost-effective, disposable and biocompatible nature of these nanomaterials. The GO-CS/SPCE demonstrated a wide linear range of 30-500 $mu M$ with a sensitivity of 0.03 $mu Amu M^{-1}$ and good reproducibility, highlighting the potential of GO-CS/SPCE as a low-cost, disposable and practical sensor for Tyr point of care (POC) testing.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"352 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-08-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134289886","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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