Pub Date : 2021-07-28DOI: 10.1109/NANO51122.2021.9514348
M. Jalali, Sayed Iman Isaac Hosseini, T. AbdelFatah, L. Montermini, S. Hogiu, J. Rak, S. Mahshid
The need for repeated molecular analyses in facilitating precision oncology, drive the efforts to amend liquid biopsy methods. Surface enhanced Raman spectroscopy (SERS) provides a facile platform for liquid biopsy applications. The plasmonic nanomaterials represents a paradigm shift in harnessing the distinguished merits of SERS platforms and therefore of remarkable potential to enhance the sensitivity of the identification. Here, we studied the fabrication, implementation, and application of nanobowtie structures embedded in a microfluidic device for sensitive SERS identification. As a proof of principle, we evaluated the competence of the device in SERS identification of the extracellular vesicles derived from NHA cells for sensitivity. Using the nanobowtie embedded microfluidic device, we were able to distinguish a set of peaks expressed in NHA EVs populations from the artificial homogenous vesicles.
{"title":"Nanobowtie Embedded Microfluidic Device for SERS Identification of Extracellular Vesicles from Synthetic Liposomes","authors":"M. Jalali, Sayed Iman Isaac Hosseini, T. AbdelFatah, L. Montermini, S. Hogiu, J. Rak, S. Mahshid","doi":"10.1109/NANO51122.2021.9514348","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514348","url":null,"abstract":"The need for repeated molecular analyses in facilitating precision oncology, drive the efforts to amend liquid biopsy methods. Surface enhanced Raman spectroscopy (SERS) provides a facile platform for liquid biopsy applications. The plasmonic nanomaterials represents a paradigm shift in harnessing the distinguished merits of SERS platforms and therefore of remarkable potential to enhance the sensitivity of the identification. Here, we studied the fabrication, implementation, and application of nanobowtie structures embedded in a microfluidic device for sensitive SERS identification. As a proof of principle, we evaluated the competence of the device in SERS identification of the extracellular vesicles derived from NHA cells for sensitivity. Using the nanobowtie embedded microfluidic device, we were able to distinguish a set of peaks expressed in NHA EVs populations from the artificial homogenous vesicles.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"12 1","pages":"400-402"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74458057","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 : 2021-07-28DOI: 10.1109/NANO51122.2021.9514296
A. Zinn, R. Stoltenberg, Reynaldo Joven, Nhi K. Ngo, Alexander Capanzana
We set out to affirm the high reliability of a novel nanocopper-based highly conductive bond agent that allows the formulation of an entire suite of Tunable Engineered Copper (TEC) pastes and inks suited for a wide range of SMT die-bonding and packaging applications. In this paper, we present comprehensive thermal cycling and thermal shock data on 3×3 mm silicon carbide (SiC) dies bonded to patterned direct-bond copper (DBC) aluminum nitride (AlN) substrates. We found a 100% survival rate for over 100 devices tested across 3 different test series substantiating the high reliability provided by TEC. Some parts even survived repeated 100 kg shear loads (>110 MPa) after thermal treatment without failing. The pressure-less, fused-copper interfaces exhibit superior electrical (as high as 70% IACS) and thermal (as high as 330 W/m·K) conductivity compared to common tin-based solders and sintered silver. Therefore, TEC offers for the first time a viable all-copper SMT material completely decoupling process-temperature from operating temperature that enables all-copper packaging systems that eliminates brittle IMC formation. High-temperature stability has already been tested to over 500°C. With these properties, it is vastly superior to sintered silver and processable without the need for pressure during fusion with just a few minutes processing time. TEC has been under development for over 10 years and recently matured to the point that it can be integrated into commercial products.
我们开始确认一种新型纳米铜基高导电性粘结剂的高可靠性，该粘结剂允许制定一整套可调工程铜(TEC)浆料和油墨，适用于广泛的SMT模粘接和封装应用。在本文中，我们提供了3×3 mm碳化硅(SiC)模具与图像化直接键合铜(DBC)氮化铝(AlN)衬底结合的综合热循环和热冲击数据。我们发现，在3个不同的测试系列中，超过100个设备的100%存活率证实了TEC提供的高可靠性。部分部件在热处理后甚至可以承受100 kg (>110 MPa)的剪切载荷而不失效。与普通锡基焊料和烧结银相比，无压熔融铜界面具有优越的电导率(高达70% IACS)和热导电性(高达330 W/m·K)。因此，TEC首次提供了一种可行的全铜SMT材料，完全将工艺温度与工作温度脱钩，使全铜封装系统能够消除脆性IMC形成。高温稳定性已经测试到500°C以上。由于这些特性，它大大优于烧结银，并且在熔合过程中无需压力即可加工，只需几分钟的加工时间。TEC已经开发了10多年，最近已经成熟到可以集成到商业产品中。
{"title":"High Reliability Engineered Copper SMT Bonding Material","authors":"A. Zinn, R. Stoltenberg, Reynaldo Joven, Nhi K. Ngo, Alexander Capanzana","doi":"10.1109/NANO51122.2021.9514296","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514296","url":null,"abstract":"We set out to affirm the high reliability of a novel nanocopper-based highly conductive bond agent that allows the formulation of an entire suite of Tunable Engineered Copper (TEC) pastes and inks suited for a wide range of SMT die-bonding and packaging applications. In this paper, we present comprehensive thermal cycling and thermal shock data on 3×3 mm silicon carbide (SiC) dies bonded to patterned direct-bond copper (DBC) aluminum nitride (AlN) substrates. We found a 100% survival rate for over 100 devices tested across 3 different test series substantiating the high reliability provided by TEC. Some parts even survived repeated 100 kg shear loads (>110 MPa) after thermal treatment without failing. The pressure-less, fused-copper interfaces exhibit superior electrical (as high as 70% IACS) and thermal (as high as 330 W/m·K) conductivity compared to common tin-based solders and sintered silver. Therefore, TEC offers for the first time a viable all-copper SMT material completely decoupling process-temperature from operating temperature that enables all-copper packaging systems that eliminates brittle IMC formation. High-temperature stability has already been tested to over 500°C. With these properties, it is vastly superior to sintered silver and processable without the need for pressure during fusion with just a few minutes processing time. TEC has been under development for over 10 years and recently matured to the point that it can be integrated into commercial products.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"5 1","pages":"413-416"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76259652","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 : 2021-07-28DOI: 10.1109/nano51122.2021.9514317
Marzieh Savadkoohi, Bishnu R. Dahal, Eva Mutungo, Andrew Grizzle, Christophe D'Angelo, P. Tyagi
Striking advancement of science over the last few decades has doubled the need of having faster and more efficient electronic devices. Magnetic tunnel junction-based molecular spintronic devices (MTJMSDs) are potential platforms for futuristic computers and may significantly reduce power consumption and enhance processing speed [1], [2]. Using transport properties of electrons, MTJMSD creates conductive molecular channels between two FM electrodes (FMEs). In our previous work, we investigated the effect of several factors on MTJMSDs' magnetic properties through Monte Carlo Simulation (MCS). Our results showed that i) Molecule-FMEs' coupling strength and nature ii) FMEs' length and thickness and iii) thermal energy have determinative effect on MTJMSD magnetic behavior [3]. For our initial comprehension, we constrained our earlier studies to just electrons' transport properties via molecular channels. In this research we took one step further towards realization of MTJMSD magnetic properties and investigated the effect of spin fluctuation (SF) as well. Here, we report the result of an extreme case where molecules made a strong antiFM coupling with one electrode and a strong FM coupling with another one at room temperature (KT=0.1 of the Curie temperature) for a fixed device size. Our preliminary results show that MTJMSD's need more iteration counts to attain equilibrium state in the presence of SFs. According to our MCS results, 16 molecules can induce antiFM coupling between FMEs in both with and without SF cases. However, the spatial orientation of M is noisier in the presence of SF despite doing 500 million simulation counts. The correlation results agree with spatial orientation of electrodes and molecules' magnetic moment. Based on our observation, there is a strong negative/antiferromagnetic correlation between FMEs when there is no SF. However, there are multiple pockets of average to high negative correlation between FMEs and molecules while applying SF effect. To complement our study and gain a better understanding of the role of SF on MTJMSD's magnetic properties, we will also investigate time evolution of energy, magnetic susceptibility and coupling energy required for transition from low to high magnetization.
{"title":"Impact of Spin Fluctuation on the magnetic properties of Magnetic Tunnel Junction-Based Molecular Spintronic Device (MTJMSD)","authors":"Marzieh Savadkoohi, Bishnu R. Dahal, Eva Mutungo, Andrew Grizzle, Christophe D'Angelo, P. Tyagi","doi":"10.1109/nano51122.2021.9514317","DOIUrl":"https://doi.org/10.1109/nano51122.2021.9514317","url":null,"abstract":"Striking advancement of science over the last few decades has doubled the need of having faster and more efficient electronic devices. Magnetic tunnel junction-based molecular spintronic devices (MTJMSDs) are potential platforms for futuristic computers and may significantly reduce power consumption and enhance processing speed [1], [2]. Using transport properties of electrons, MTJMSD creates conductive molecular channels between two FM electrodes (FMEs). In our previous work, we investigated the effect of several factors on MTJMSDs' magnetic properties through Monte Carlo Simulation (MCS). Our results showed that i) Molecule-FMEs' coupling strength and nature ii) FMEs' length and thickness and iii) thermal energy have determinative effect on MTJMSD magnetic behavior [3]. For our initial comprehension, we constrained our earlier studies to just electrons' transport properties via molecular channels. In this research we took one step further towards realization of MTJMSD magnetic properties and investigated the effect of spin fluctuation (SF) as well. Here, we report the result of an extreme case where molecules made a strong antiFM coupling with one electrode and a strong FM coupling with another one at room temperature (KT=0.1 of the Curie temperature) for a fixed device size. Our preliminary results show that MTJMSD's need more iteration counts to attain equilibrium state in the presence of SFs. According to our MCS results, 16 molecules can induce antiFM coupling between FMEs in both with and without SF cases. However, the spatial orientation of M is noisier in the presence of SF despite doing 500 million simulation counts. The correlation results agree with spatial orientation of electrodes and molecules' magnetic moment. Based on our observation, there is a strong negative/antiferromagnetic correlation between FMEs when there is no SF. However, there are multiple pockets of average to high negative correlation between FMEs and molecules while applying SF effect. To complement our study and gain a better understanding of the role of SF on MTJMSD's magnetic properties, we will also investigate time evolution of energy, magnetic susceptibility and coupling energy required for transition from low to high magnetization.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"36 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85388919","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 : 2021-07-28DOI: 10.1109/NANO51122.2021.9514352
P. G. López-Cárdenas, E. Alcala, J. Sánchez‐Torres, E. Araujo
This paper's primary motivation is developing non-invasive glucose monitoring methods and devices by detecting hydrogen peroxide in fluids like tears, sweat, or saliva since it is a subproduct molecule of various biochemical processes directly correlated with glucose concentration. The availability of those mentioned tools could facilitate the rapid development of reliable and cheap sensors without the complications of using invasive methods, especially when blood samples are repeatedly required. Therefore, this work aims to lay the foundations for developing non-invasive and highly sensitive glucose detection methods as the ultimate proposal. Consequently, contributing to track and control the high glucose levels that cause significant health and economic problems in our society. Thus, this paper presents an approach for enhancing the hydrogen peroxide sensitivity in sensors nanostructured with nanowires. In contrast to most of the standard design methodologies, this scheme does not rely on phenomenological models but experimental data and statistical modeling. Firstly, for a sensor with a given design, the data obtained with cyclic voltammetry allows finding the potential at which the sensor's response is the highest for hydrogen peroxide's concentrations ranging from 0 to 20 millimoles. Secondly, after calculating the optimal potential, a linear regression correctly relates current density with the concentration, representing the sensor's sensitivity as such a linear model's slope. Finally, using planar (non- nanostructured) sensors as a benchmark, a statistical test allows concluding that the sensitivity is significantly higher for nanostructured sensors using gold and nickel self-supported nanowires arrays than planar.
{"title":"Enhancing the Sensitivity of a Class of Sensors: A Data-Based Engineering Approach","authors":"P. G. López-Cárdenas, E. Alcala, J. Sánchez‐Torres, E. Araujo","doi":"10.1109/NANO51122.2021.9514352","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514352","url":null,"abstract":"This paper's primary motivation is developing non-invasive glucose monitoring methods and devices by detecting hydrogen peroxide in fluids like tears, sweat, or saliva since it is a subproduct molecule of various biochemical processes directly correlated with glucose concentration. The availability of those mentioned tools could facilitate the rapid development of reliable and cheap sensors without the complications of using invasive methods, especially when blood samples are repeatedly required. Therefore, this work aims to lay the foundations for developing non-invasive and highly sensitive glucose detection methods as the ultimate proposal. Consequently, contributing to track and control the high glucose levels that cause significant health and economic problems in our society. Thus, this paper presents an approach for enhancing the hydrogen peroxide sensitivity in sensors nanostructured with nanowires. In contrast to most of the standard design methodologies, this scheme does not rely on phenomenological models but experimental data and statistical modeling. Firstly, for a sensor with a given design, the data obtained with cyclic voltammetry allows finding the potential at which the sensor's response is the highest for hydrogen peroxide's concentrations ranging from 0 to 20 millimoles. Secondly, after calculating the optimal potential, a linear regression correctly relates current density with the concentration, representing the sensor's sensitivity as such a linear model's slope. Finally, using planar (non- nanostructured) sensors as a benchmark, a statistical test allows concluding that the sensitivity is significantly higher for nanostructured sensors using gold and nickel self-supported nanowires arrays than planar.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"132 1","pages":"221-224"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76768921","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 : 2021-07-28DOI: 10.1109/NANO51122.2021.9514356
Gaurab Panda, Haozhi Dong, V. Ayres, M. Hussain
In this work, we report growth of highly crystalline Ni, Co and layered Ni-Co nanowires obtained by a novel combination of high-speed turbulent flow electrodeposition with a thin hydrocarbon layer on an oxidized titanium substrate. Our results indicate that a turbulent flow regime can be used to break a hydrocarbon surface film into an array of carbon catalyst particles while creating solute-substrate ion chemistries that are conducive for highly crystalline Ni, Co and layered Ni-Co nanowire growth.
{"title":"Quantitative Investigation of New Templateless Growth Method for Highly Crystalline Ni, Co and Ni-Co Nanowires","authors":"Gaurab Panda, Haozhi Dong, V. Ayres, M. Hussain","doi":"10.1109/NANO51122.2021.9514356","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514356","url":null,"abstract":"In this work, we report growth of highly crystalline Ni, Co and layered Ni-Co nanowires obtained by a novel combination of high-speed turbulent flow electrodeposition with a thin hydrocarbon layer on an oxidized titanium substrate. Our results indicate that a turbulent flow regime can be used to break a hydrocarbon surface film into an array of carbon catalyst particles while creating solute-substrate ion chemistries that are conducive for highly crystalline Ni, Co and layered Ni-Co nanowire growth.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"25 1","pages":"405-408"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88703457","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 : 2021-07-28DOI: 10.1109/NANO51122.2021.9514318
Tinn Hongboontry, Surada Ponwaranon, Supphakorn Sirijongdee, C. Thanachayanont, P. Pungetmongkol
Creatinine, a metabolized product of phosphocreatine in muscles, is excreted via urine by kidneys. Creatinine concentration in urine is an indicator of renal function for a patient with chronic kidney disease. A single-use and portable screen-printed carbon electrode with copper oxide nanostructure was developed for creatinine detection via copper-creatinine complex formation. SEM was deployed to visualize the copper oxide nanostructure. Creatinine measurement was performed in 0.1 M PBS at pH 6.5 with a smartphone application and portable near-field communication potentiostat. Five chemicals were tested as interferences. The CuO/SPCE shows linear and repeatable responses of creatinine from 0–30 mM, which makes it an appealing alternative for quick and reliable CRE detection.
肌酸酐是肌肉中磷酸肌酸的代谢产物，由肾脏通过尿液排出。尿肌酐浓度是慢性肾病患者肾功能的一个指标。通过铜-肌酸酐络合物的形成，制备了一种具有氧化铜纳米结构的一次性便携式丝网印刷碳电极，用于肌酸酐的检测。利用扫描电镜观察氧化铜纳米结构。肌酐测量在0.1 M PBS中进行，pH为6.5，使用智能手机应用程序和便携式近场通信电位器。测试了五种化学物质作为干扰物。CuO/SPCE在0-30 mM范围内对肌酐具有线性和可重复的响应，这使其成为快速可靠的CRE检测的一种有吸引力的替代方法。
{"title":"Low-cost and Portable Creatinine Electrochemical Sensor for Non-invasive Chronic Kidney Disease Monitoring","authors":"Tinn Hongboontry, Surada Ponwaranon, Supphakorn Sirijongdee, C. Thanachayanont, P. Pungetmongkol","doi":"10.1109/NANO51122.2021.9514318","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514318","url":null,"abstract":"Creatinine, a metabolized product of phosphocreatine in muscles, is excreted via urine by kidneys. Creatinine concentration in urine is an indicator of renal function for a patient with chronic kidney disease. A single-use and portable screen-printed carbon electrode with copper oxide nanostructure was developed for creatinine detection via copper-creatinine complex formation. SEM was deployed to visualize the copper oxide nanostructure. Creatinine measurement was performed in 0.1 M PBS at pH 6.5 with a smartphone application and portable near-field communication potentiostat. Five chemicals were tested as interferences. The CuO/SPCE shows linear and repeatable responses of creatinine from 0–30 mM, which makes it an appealing alternative for quick and reliable CRE detection.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"13 1","pages":"159-162"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90998773","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 : 2021-07-28DOI: 10.1109/NANO51122.2021.9514295
K. Sehra, V. Kumari, Mridula Gupta, M. Mishra, D. S. Rawal, M. Saxena
This work evaluates the degradation mechanisms of the proton irradiated HEMTs incorporating graded AlGaN layers that support 3DEG for the conduction and 3DHG as a back barrier and subsequently evaluating it for dosimeter applications. The results presented demonstrate the deleterious effects of the proton fluence on the device's transfer characteristics in creating a bottleneck towards the flow of carriers in the 3DEG sheet. However, the trench gate arrangement with HfO2 insulator controlling the bottleneck for the device operation remains intact even at a high proton fluence.
{"title":"Degradation Mechanisms in a Proton Irradiated HEMT with 3DEG Conduction and 3DHG as a Back Barrier","authors":"K. Sehra, V. Kumari, Mridula Gupta, M. Mishra, D. S. Rawal, M. Saxena","doi":"10.1109/NANO51122.2021.9514295","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514295","url":null,"abstract":"This work evaluates the degradation mechanisms of the proton irradiated HEMTs incorporating graded AlGaN layers that support 3DEG for the conduction and 3DHG as a back barrier and subsequently evaluating it for dosimeter applications. The results presented demonstrate the deleterious effects of the proton fluence on the device's transfer characteristics in creating a bottleneck towards the flow of carriers in the 3DEG sheet. However, the trench gate arrangement with HfO2 insulator controlling the bottleneck for the device operation remains intact even at a high proton fluence.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"11 1","pages":"173-176"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91021739","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 : 2021-07-28DOI: 10.1109/NANO51122.2021.9514350
Avik Ghosh Dastidar, R. Tiwari, R. Maity, N. Maity
The present study aims to unveil the efficacy of three different theoretical models namely both sides clamped circular plates model, clamped circular model with nonlocal plate theory (modified for nano scale) and membrane displacement model using silicon nitride (Si3N4) capacitive micromachined ultrasonic transducer (CMUT). To address the edge effects in calculation of capacitance of CMUT which should not be neglected in case of small dimension like micrometer or less, Landau & Lifschitz method of fringing has been incorporated in all these three models to precisely compute the displacement profiles. To validate these analytical models, the Finite Element Modelling (FEM) model has been built with COMSOL. The thorough investigation for various radius and thickness of the diaphragm of the CMUT has been done to reveal the superiority of a particular analytical model depending on the CMUT dimension.
{"title":"Displacement Profile of Micromachined Nano-Electro-Mechanical-Ultrasonic Pressure Sensor: A Comparative Analysis","authors":"Avik Ghosh Dastidar, R. Tiwari, R. Maity, N. Maity","doi":"10.1109/NANO51122.2021.9514350","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514350","url":null,"abstract":"The present study aims to unveil the efficacy of three different theoretical models namely both sides clamped circular plates model, clamped circular model with nonlocal plate theory (modified for nano scale) and membrane displacement model using silicon nitride (Si3N4) capacitive micromachined ultrasonic transducer (CMUT). To address the edge effects in calculation of capacitance of CMUT which should not be neglected in case of small dimension like micrometer or less, Landau & Lifschitz method of fringing has been incorporated in all these three models to precisely compute the displacement profiles. To validate these analytical models, the Finite Element Modelling (FEM) model has been built with COMSOL. The thorough investigation for various radius and thickness of the diaphragm of the CMUT has been done to reveal the superiority of a particular analytical model depending on the CMUT dimension.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"70 1","pages":"60-63"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86327231","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 : 2021-07-28DOI: 10.1109/NANO51122.2021.9514313
Daeun Kim, Jiwon Park, Youn Tae Kim
As the demand for low-carbon and eco-friendly energy is increasing and the use of wearable devices is soaring, the triboelectric nanogenerator (TENG), which can economically harvest energy, is in the spotlight. Among many materials, paper is considered a promising substrate and frame material for self-powered TENG due to its high accessibility, flexibility, and biocompatibility. Here, we present a new structure of foldable paper based TENG (FP-TENG) composed of paper and PTFE/Si-rubber. The double-folded FP-TENG generates voltages and currents of 153 V and 2.2 µA, respectively, and shows excellent durability without signal degradation under 5,000 cycles of external force. A watch strap was manufactured with FP-TENG and integrated with an electronic watch pannel to supply power, and several LEDs were turned on. Therefore, FP-TENG is expected to be utilized as a promising eco-friendly energy source for small electronic devices.
{"title":"Foldable paper based triboelectric nanogenerator for green energy harvesting","authors":"Daeun Kim, Jiwon Park, Youn Tae Kim","doi":"10.1109/NANO51122.2021.9514313","DOIUrl":"https://doi.org/10.1109/NANO51122.2021.9514313","url":null,"abstract":"As the demand for low-carbon and eco-friendly energy is increasing and the use of wearable devices is soaring, the triboelectric nanogenerator (TENG), which can economically harvest energy, is in the spotlight. Among many materials, paper is considered a promising substrate and frame material for self-powered TENG due to its high accessibility, flexibility, and biocompatibility. Here, we present a new structure of foldable paper based TENG (FP-TENG) composed of paper and PTFE/Si-rubber. The double-folded FP-TENG generates voltages and currents of 153 V and 2.2 µA, respectively, and shows excellent durability without signal degradation under 5,000 cycles of external force. A watch strap was manufactured with FP-TENG and integrated with an electronic watch pannel to supply power, and several LEDs were turned on. Therefore, FP-TENG is expected to be utilized as a promising eco-friendly energy source for small electronic devices.","PeriodicalId":6791,"journal":{"name":"2021 IEEE 21st International Conference on Nanotechnology (NANO)","volume":"27 1","pages":"96-99"},"PeriodicalIF":0.0,"publicationDate":"2021-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80685492","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 : 2021-07-28DOI: 10.1109/NANO51122.2021.9514284
O. Kaya, Nazli Donmezer
Recent developments in nanofabrication have been enabling us to build 2D material-based devices with superior electrical, optical, and thermal properties. Just as with many other semiconductor devices heat generated within the device during operation may cause device degradation and reliability problems. In these devices, 2D and GaN or SiO2 materials are in contact due to fabrication or/and device requirements. Around these interfaces, thermal properties are strongly affected by the phonon scattering mechanisms in materials. Although thermal boundary conductance has been investigated more; despite its importance, the change in individual material thermal conductivities are not investigated in detail. To observe the changes in material thermal conductivities around the interfaces, heterostructures of common 2D materials: Mos2, WSe2, and h-BN on GaN and SiO2 substrates are simulated through nonequilibrium molecular dynamics (NEMD). Obtained thermal conductivities are later compared with the thermal conductivities of the isolated materials. These results shed light on the thermal transport mechanisms in 2D/GaN and 2D/SiO2 heterostructures and help to build better thermal management strategies for devices involving such architectures.
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