Pub Date : 2020-08-16DOI: 10.1109/FLEPS49123.2020.9239500
R. Horne, J. Batchelor, P. Taylor, Ertan Balaban, A. Casson
Electrocardiograms provide rhythm, rate and electrical activity of the heart which can be used to diagnose health issues. Current methodologies for wireless based heart monitoring favour the use of Bluetooth Low Energy, which can require bulky batteries for device longevity. This paper investigates the use of a novel ultra-low power communications technique utilising Ultra High Frequency Radio Frequency Identification to stream ECG data in real time to a host computer to enable sub 2mW power consumption.
{"title":"Ultra-Low Power on Skin ECG using RFID Communication","authors":"R. Horne, J. Batchelor, P. Taylor, Ertan Balaban, A. Casson","doi":"10.1109/FLEPS49123.2020.9239500","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239500","url":null,"abstract":"Electrocardiograms provide rhythm, rate and electrical activity of the heart which can be used to diagnose health issues. Current methodologies for wireless based heart monitoring favour the use of Bluetooth Low Energy, which can require bulky batteries for device longevity. This paper investigates the use of a novel ultra-low power communications technique utilising Ultra High Frequency Radio Frequency Identification to stream ECG data in real time to a host computer to enable sub 2mW power consumption.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"33 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":"115265507","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/FLEPS49123.2020.9239479
U. Passlack, Mourad Elsobky, A. Mueller, C. Scherjon, C. Harendt, J. Burghartz
Hybrid Systems-in-Foil (HySiF) encompass large-area thin-film components and ultra-thin, high performance CMOS chips, which are integrated into a flexible polymeric foil substrate. In this work, we present a customized Chip-Film Patch (CFP) system where an ultra-thin read-out ASIC is embedded in spin-coated polyimide film to monitor the breathing system of newborns and premature infants. The latest developments in the CFP process using the low stress polyimide PI2611 are shown. Particularly, the process optimization for the spin-coating and etching of polyimide are highlighted. Besides, the electrical characterization of the ultra-thin read-out chip is presented. Finally, the feasibility of a polyimide-based strain sensor and its electro-mechanical characterization are demonstrated.
{"title":"Chip-Film Patch Sensor System with Integrated Read-out ASIC for Biomedical Applications","authors":"U. Passlack, Mourad Elsobky, A. Mueller, C. Scherjon, C. Harendt, J. Burghartz","doi":"10.1109/FLEPS49123.2020.9239479","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239479","url":null,"abstract":"Hybrid Systems-in-Foil (HySiF) encompass large-area thin-film components and ultra-thin, high performance CMOS chips, which are integrated into a flexible polymeric foil substrate. In this work, we present a customized Chip-Film Patch (CFP) system where an ultra-thin read-out ASIC is embedded in spin-coated polyimide film to monitor the breathing system of newborns and premature infants. The latest developments in the CFP process using the low stress polyimide PI2611 are shown. Particularly, the process optimization for the spin-coating and etching of polyimide are highlighted. Besides, the electrical characterization of the ultra-thin read-out chip is presented. Finally, the feasibility of a polyimide-based strain sensor and its electro-mechanical characterization are demonstrated.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"22 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":"115926655","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/FLEPS49123.2020.9239521
Kiran Kumar Sappati, S. Bhadra
A flexible printed acoustic sensor for temperature measurement is reported. The sensor is based on an acoustic resonator operating in FPW mode and is fabricated by printing silver Interdigitated transducers (IDTs) on 0-3 lead zirconate titanate (PZT)- poly dimethylo siloxane (PDMS) composite thin film. IDTs are designed with a wavelength of 800 microns and aperture of 12 mm. A temperature variation changes the FPW velocity and thereby the resonant frequency of the FPW resonator. Therefore, temperature of the environment can be monitored by measuring the change of sensor’s resonant frequency. Results obtained for the sensor exhibited a linear relationship between the resonant frequency of the sensor and temperature over a over 25 to 120°C temperature range with a sensitivity of 18.111 kHz/°C. The high piezoelectric charge constant of the composite results in a low attenuation of the acoustic resonator. The sensor can be useful where low cost flexible temperature sensing is required.
{"title":"Printed Polymer based Acoustic Sensor for Temperature Monitoring","authors":"Kiran Kumar Sappati, S. Bhadra","doi":"10.1109/FLEPS49123.2020.9239521","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239521","url":null,"abstract":"A flexible printed acoustic sensor for temperature measurement is reported. The sensor is based on an acoustic resonator operating in FPW mode and is fabricated by printing silver Interdigitated transducers (IDTs) on 0-3 lead zirconate titanate (PZT)- poly dimethylo siloxane (PDMS) composite thin film. IDTs are designed with a wavelength of 800 microns and aperture of 12 mm. A temperature variation changes the FPW velocity and thereby the resonant frequency of the FPW resonator. Therefore, temperature of the environment can be monitored by measuring the change of sensor’s resonant frequency. Results obtained for the sensor exhibited a linear relationship between the resonant frequency of the sensor and temperature over a over 25 to 120°C temperature range with a sensitivity of 18.111 kHz/°C. The high piezoelectric charge constant of the composite results in a low attenuation of the acoustic resonator. The sensor can be useful where low cost flexible temperature sensing is required.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"4 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":"123712973","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/FLEPS49123.2020.9239441
Hasbi Sevinc, Ugur Ayvaz, Kadir Ozlem, Hend Elmoughni, A. Atalay, O. Atalay, G. Ince
One of the main challenges of navigation systems is the inability of orientation and insufficient localization accuracy in indoor spaces. There are situations where navigation is required to function indoors with high accuracy. One such example is the task of safely guiding visually impaired people from one place to another indoors. In this study, to increase localization performance indoors, a novel method was proposed that estimates the step length of the visually impaired person using machine learning models. Thereby, once the initial position of the person is known, it is possible to predict their new position by measuring the length of their steps. The step length estimation system was trained using the data from three separate devices; capacitive bend sensors, a smart phone, and WeWALK, a smartcane developed to assist visually impaired people. Out of the various machine learning models used, the best result obtained using the K Nearest Neighbor model, with a score of $0.945 R^{2}$. These results support that indoor navigation will be possible through step length estimation.
{"title":"Step Length Estimation Using Sensor Fusion","authors":"Hasbi Sevinc, Ugur Ayvaz, Kadir Ozlem, Hend Elmoughni, A. Atalay, O. Atalay, G. Ince","doi":"10.1109/FLEPS49123.2020.9239441","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239441","url":null,"abstract":"One of the main challenges of navigation systems is the inability of orientation and insufficient localization accuracy in indoor spaces. There are situations where navigation is required to function indoors with high accuracy. One such example is the task of safely guiding visually impaired people from one place to another indoors. In this study, to increase localization performance indoors, a novel method was proposed that estimates the step length of the visually impaired person using machine learning models. Thereby, once the initial position of the person is known, it is possible to predict their new position by measuring the length of their steps. The step length estimation system was trained using the data from three separate devices; capacitive bend sensors, a smart phone, and WeWALK, a smartcane developed to assist visually impaired people. Out of the various machine learning models used, the best result obtained using the K Nearest Neighbor model, with a score of $0.945 R^{2}$. These results support that indoor navigation will be possible through step length estimation.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"94 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":"124608641","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/FLEPS49123.2020.9239454
S. Zahertar, Jiaen Wu, G. Chatzipirpiridis, O. Ergeneman, P. Canyelles-Pericas, R. Tao, Y. Fu, H. Torun
Acoustofluidic devices have been demonstrated effectively for liquid manipulation functionalities. Likewise, electromagnetic metamaterials have been employed as highly sensitive and wireless sensors. In this work, we introduced a new design combining the concepts of acoustofluidics and electromagnetic metamaterials on a single device realised on a flexible PVDF substrate. We characterise the operation of the device at acoustic and microwave frequencies. The device can be used in wearable biosensors with integrated liquid sampling and continuous wireless sensing capabilities.
{"title":"A Flexible PVDF-based Platform Combining Acoustofluidics and Electromagnetic Metamaterials","authors":"S. Zahertar, Jiaen Wu, G. Chatzipirpiridis, O. Ergeneman, P. Canyelles-Pericas, R. Tao, Y. Fu, H. Torun","doi":"10.1109/FLEPS49123.2020.9239454","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239454","url":null,"abstract":"Acoustofluidic devices have been demonstrated effectively for liquid manipulation functionalities. Likewise, electromagnetic metamaterials have been employed as highly sensitive and wireless sensors. In this work, we introduced a new design combining the concepts of acoustofluidics and electromagnetic metamaterials on a single device realised on a flexible PVDF substrate. We characterise the operation of the device at acoustic and microwave frequencies. The device can be used in wearable biosensors with integrated liquid sampling and continuous wireless sensing capabilities.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"57 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":"128538979","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/FLEPS49123.2020.9239595
Mahmoud Wagih, A. Komolafe, B. Zaghari
Direct-write dispenser printing represents a simple solution to rapid flexible and printed electronics prototyping and low-volume manufacturing. This work presents the design, fabrication and evaluation of magnetic resonance wireless power transfer (WPT) coils fabricated using dispenser printing. A double-sided inductor is designed and printed on a flexible polyimide substrate using a commercial dispenser printer. The dispenser printer is used to realize the single-sided coils which are heat pressed to form double-sided inductors using a conductive epoxy via. It is demonstrated that the proposed double-sided coils achieve over 53.8% higher quality factor than a single-sided coil, and 67% higher inductance than two series-connected coils. The coils are tuned to resonate at 6.78 MHz using lumped-matching. The proposed coils achieve a peak WPT efficiency of 50%.
{"title":"Wearable Wireless Power Transfer using Direct-Write Dispenser Printed Flexible Coils","authors":"Mahmoud Wagih, A. Komolafe, B. Zaghari","doi":"10.1109/FLEPS49123.2020.9239595","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239595","url":null,"abstract":"Direct-write dispenser printing represents a simple solution to rapid flexible and printed electronics prototyping and low-volume manufacturing. This work presents the design, fabrication and evaluation of magnetic resonance wireless power transfer (WPT) coils fabricated using dispenser printing. A double-sided inductor is designed and printed on a flexible polyimide substrate using a commercial dispenser printer. The dispenser printer is used to realize the single-sided coils which are heat pressed to form double-sided inductors using a conductive epoxy via. It is demonstrated that the proposed double-sided coils achieve over 53.8% higher quality factor than a single-sided coil, and 67% higher inductance than two series-connected coils. The coils are tuned to resonate at 6.78 MHz using lumped-matching. The proposed coils achieve a peak WPT efficiency of 50%.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"37 10 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":"114283971","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/FLEPS49123.2020.9239450
Pasindu Lugoda, Júlio C. Costa, A. Pouryazdan, L. García-García, D. Roggen, N. Münzenrieder
The zero potential technique is an efficient way to selectively condition passive resistive sensor arrays. However, for flexible wearable sensor systems, the currently utilised amplifiers are not desirable as they are normally based on rigid devices. We present a variation of the zero potential approach utilising flexible thin-film transimpedance amplifiers. This integrated amplifier is based on IGZO thin-film transistors (TFTs) and has a measured cut-off frequency of $approx 4$ kHz, which is sufficient for most sensing applications. To understand the performance when conditioning a grid of sensors, the flexible system was simulated and compared to the results obtained from rigid transimpedance amplifiers. While these rigid devices led to virtually no crosstalk between sensors, the flexible transimpedance amplifier maintained a selectivity factor of nearly 3. At the same time, the fully flexible IGZO amplifier can be seamlessly integrated with a flexible sensor array and has a footprint of only 1.6 mm2. This approach can enable easily manufactureable, fully flexible, and wearable sensor systems with a minimum number of active devices, avoiding active matrix structures and individual sensor conditioning while maintaining a certain level of sensitivity.
{"title":"Evaluation of a Pseudo Zero-Potential Flexible Readout Circuit for Resistive Sensor Matrixes","authors":"Pasindu Lugoda, Júlio C. Costa, A. Pouryazdan, L. García-García, D. Roggen, N. Münzenrieder","doi":"10.1109/FLEPS49123.2020.9239450","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239450","url":null,"abstract":"The zero potential technique is an efficient way to selectively condition passive resistive sensor arrays. However, for flexible wearable sensor systems, the currently utilised amplifiers are not desirable as they are normally based on rigid devices. We present a variation of the zero potential approach utilising flexible thin-film transimpedance amplifiers. This integrated amplifier is based on IGZO thin-film transistors (TFTs) and has a measured cut-off frequency of $approx 4$ kHz, which is sufficient for most sensing applications. To understand the performance when conditioning a grid of sensors, the flexible system was simulated and compared to the results obtained from rigid transimpedance amplifiers. While these rigid devices led to virtually no crosstalk between sensors, the flexible transimpedance amplifier maintained a selectivity factor of nearly 3. At the same time, the fully flexible IGZO amplifier can be seamlessly integrated with a flexible sensor array and has a footprint of only 1.6 mm2. This approach can enable easily manufactureable, fully flexible, and wearable sensor systems with a minimum number of active devices, avoiding active matrix structures and individual sensor conditioning while maintaining a certain level of sensitivity.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"8 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":"131314956","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/FLEPS49123.2020.9239518
Doğukan Korkut, Kuter Erdil, Ö. G. Akcan, B. Muslu, Eray A. Baran, Y. D. Gökdel
This paper presents the design, fabrication, experimental results and related discussion of a portable bending enhancing silicone mold structure for biomedical applications in which a high-sensitive but low-cost force measurement structure with a large-dynamic range is required. Proposed system is composed of a replaceable parts like graphite coated Strathmore® 400 series Bristol paper and cheap RTV-2 silicone molds. The results shows that low-cost, portable and high-sensitive force and strain sensor systems can be realized for point-of-care biomedical applications in the future.
{"title":"Silicone Mold Implementation for High-Sensitive Detection of Strain Sensing using Paper-Based Piezoresistive System","authors":"Doğukan Korkut, Kuter Erdil, Ö. G. Akcan, B. Muslu, Eray A. Baran, Y. D. Gökdel","doi":"10.1109/FLEPS49123.2020.9239518","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239518","url":null,"abstract":"This paper presents the design, fabrication, experimental results and related discussion of a portable bending enhancing silicone mold structure for biomedical applications in which a high-sensitive but low-cost force measurement structure with a large-dynamic range is required. Proposed system is composed of a replaceable parts like graphite coated Strathmore® 400 series Bristol paper and cheap RTV-2 silicone molds. The results shows that low-cost, portable and high-sensitive force and strain sensor systems can be realized for point-of-care biomedical applications in the future.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"48 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":"126680282","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/FLEPS49123.2020.9239544
V. Pecunia, Luis Portilla
Solution-processable electronics has been widely hailed as an attractive platform for emerging application domains such as the Internet of Things and for place-and-forget devices for health monitoring. This study specifically addresses the need for easy-to-make solution-processable electronics that can function with the low supply voltage available from flexible batteries or compact energy harvesters. By combining printed semiconducting single-walled carbon nanotube networks (SWCNTNs) with a hybrid nanodielectric, thin film transistors (TFTs) are realized that are capable of operating with a supply voltage in the range of 1 V. The adopted device stack enables balanced ambipolar characteristics, with good symmetry in their key device parameters and with carrier mobility values in the range of 10–15 cm2 V−1 s−1. On the basis of their well-conditioned ambipolar characteristics, these TFTs are integrated in CMOS fashion into inverter gates. Such inverters can operate with a supply voltage of 1 V, exhibiting complementary-like characteristics with adequate symmetry and with a gain of 35 V/V. In virtue of its ability to deliver low-voltage circuit operation, this approach constitutes a promising avenue for solution-processable electronics that can address the low-voltage requirements of emerging application domains.
{"title":"Low-Voltage Electronics Based on Carbon Nanotube Thin-Film Transistors with Hybrid Nanodielectric","authors":"V. Pecunia, Luis Portilla","doi":"10.1109/FLEPS49123.2020.9239544","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239544","url":null,"abstract":"Solution-processable electronics has been widely hailed as an attractive platform for emerging application domains such as the Internet of Things and for place-and-forget devices for health monitoring. This study specifically addresses the need for easy-to-make solution-processable electronics that can function with the low supply voltage available from flexible batteries or compact energy harvesters. By combining printed semiconducting single-walled carbon nanotube networks (SWCNTNs) with a hybrid nanodielectric, thin film transistors (TFTs) are realized that are capable of operating with a supply voltage in the range of 1 V. The adopted device stack enables balanced ambipolar characteristics, with good symmetry in their key device parameters and with carrier mobility values in the range of 10–15 cm2 V−1 s−1. On the basis of their well-conditioned ambipolar characteristics, these TFTs are integrated in CMOS fashion into inverter gates. Such inverters can operate with a supply voltage of 1 V, exhibiting complementary-like characteristics with adequate symmetry and with a gain of 35 V/V. In virtue of its ability to deliver low-voltage circuit operation, this approach constitutes a promising avenue for solution-processable electronics that can address the low-voltage requirements of emerging application domains.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"15 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":"131720436","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/FLEPS49123.2020.9239528
Ammara Ejaz, R. Dahiya
This paper presents the influence of solvents molecular geometry on the growth mechanism of ZnO nanorods and their morphology. We observed that the wurtzite hexagonal crystal system of ZnO offers a number of interacting sites at different positions for the solvent water and ethanol molecules to influence the aspect ratio of the ZnO nanorods. ZnO nanorods were synthesized individually in water and ethanol on a highly conductive nitrogen incorporated graphene oxide (NGO) substrate. NGO was synthesized by the dual interactions of paraxylylenediamine with GO, which created an abundant quantity of electrophilic and nucleophilic centers to provide an ideal environment for the synthesis of ZnO nanorods. The successful formation of nanorods in water (NGO-ZnO/W) and ethanol (NGO-ZnO/E) was confirmed through high-resolution transmission electron microscopy.
{"title":"The Role of Water and Ethanol Molecular Geometry in Goveming the Growth Kinetics of Zno-Nanorods","authors":"Ammara Ejaz, R. Dahiya","doi":"10.1109/FLEPS49123.2020.9239528","DOIUrl":"https://doi.org/10.1109/FLEPS49123.2020.9239528","url":null,"abstract":"This paper presents the influence of solvents molecular geometry on the growth mechanism of ZnO nanorods and their morphology. We observed that the wurtzite hexagonal crystal system of ZnO offers a number of interacting sites at different positions for the solvent water and ethanol molecules to influence the aspect ratio of the ZnO nanorods. ZnO nanorods were synthesized individually in water and ethanol on a highly conductive nitrogen incorporated graphene oxide (NGO) substrate. NGO was synthesized by the dual interactions of paraxylylenediamine with GO, which created an abundant quantity of electrophilic and nucleophilic centers to provide an ideal environment for the synthesis of ZnO nanorods. The successful formation of nanorods in water (NGO-ZnO/W) and ethanol (NGO-ZnO/E) was confirmed through high-resolution transmission electron microscopy.","PeriodicalId":101496,"journal":{"name":"2020 IEEE International Conference on Flexible and Printable Sensors and Systems (FLEPS)","volume":"18 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":"123431687","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：