Pub Date : 2024-10-30DOI: 10.1109/OJNANO.2024.3488787
Anmol Garg;Sajal Agarwal;Deepak Punetha
This paper reports the comparative analysis of different piezoelectric materials through a MEMS-based piezoelectric actuator model, emphasizing their potential for sensing applications. The polarization and electrostrictive strain tensor capabilities have been extensively studied for different piezoelectric materials such as PZT, LiNbO 3 , PVDF, etc. The simulation results obtained at varying voltages and mechanical stress demonstrate that LiNbO 3 exhibits superior performance among the tested materials, with a polarization value of 0.5163 C/m 2 at 800 volts and an electrostrictive strain tensor of 0.01 at an applied mechanical stress of 25 MPa. These findings will assist scientists in selecting the most suitable piezoelectric materials for sensing applications in biomedical fields.
{"title":"Polarization and Strain in Piezoelectric Nanomaterials: Advancing Sensing Applications in Biomedical Technology","authors":"Anmol Garg;Sajal Agarwal;Deepak Punetha","doi":"10.1109/OJNANO.2024.3488787","DOIUrl":"https://doi.org/10.1109/OJNANO.2024.3488787","url":null,"abstract":"This paper reports the comparative analysis of different piezoelectric materials through a MEMS-based piezoelectric actuator model, emphasizing their potential for sensing applications. The polarization and electrostrictive strain tensor capabilities have been extensively studied for different piezoelectric materials such as PZT, LiNbO\u0000<sub>3</sub>\u0000, PVDF, etc. The simulation results obtained at varying voltages and mechanical stress demonstrate that LiNbO\u0000<sub>3</sub>\u0000 exhibits superior performance among the tested materials, with a polarization value of 0.5163 C/m\u0000<sup>2</sup>\u0000 at 800 volts and an electrostrictive strain tensor of 0.01 at an applied mechanical stress of 25 MPa. These findings will assist scientists in selecting the most suitable piezoelectric materials for sensing applications in biomedical fields.","PeriodicalId":446,"journal":{"name":"IEEE Open Journal of Nanotechnology","volume":"5 ","pages":"89-97"},"PeriodicalIF":1.8,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10739969","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142636309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This study investigated the electrical properties of AlGaN/GaN high-electron-mobility transistors (HEMTs) with varied recess depths under the gate electrode. We demonstrated a recess depth of approximately 6 nm, which was achieved through neutral beam etching (NBE) technique with a low etch rate of 1.8 nm/min, resulting in device enhancement-mode (E-mode) behavior with threshold voltage (V th ) of 0.49 V. The effects of post-metallization annealing (PMA) on the device performance were also examined. The results revealed that PMA treatment improves the DC characteristics of the devices, including maximum drain current (I DMAX ), transconductance (g m ), subthreshold swing (SS), on-off ratio, and off-state leakage current, with maximum enhancement percentage of 18.3% for I DMAX , 3758% for on-off ratio, and 54.3% for SS. Moreover, this study compared the recess depths of metal-insulator-semiconductor high-electron-mobility transistors (MIS-HEMTs) with the SiN dielectric layer. The results showed that MIS-HEMTs exhibit more negative V th values, which can be attributed to the controlled surface states achieved through passivation.
{"title":"Enhancing the Performance of E-Mode AlGaN/GaN HEMTs With Recessed Gates Through Low-Damage Neutral Beam Etching and Post-Metallization Annealing","authors":"Yi-Ho Chen;Daisuke Ohori;Muhammad Aslam;Yao-Jen Lee;Yiming Li;Seiji Samukawa","doi":"10.1109/OJNANO.2023.3306011","DOIUrl":"10.1109/OJNANO.2023.3306011","url":null,"abstract":"This study investigated the electrical properties of AlGaN/GaN high-electron-mobility transistors (HEMTs) with varied recess depths under the gate electrode. We demonstrated a recess depth of approximately 6 nm, which was achieved through neutral beam etching (NBE) technique with a low etch rate of 1.8 nm/min, resulting in device enhancement-mode (E-mode) behavior with threshold voltage (V\u0000<sub>th</sub>\u0000) of 0.49 V. The effects of post-metallization annealing (PMA) on the device performance were also examined. The results revealed that PMA treatment improves the DC characteristics of the devices, including maximum drain current (I\u0000<sub>DMAX</sub>\u0000), transconductance (g\u0000<sub>m</sub>\u0000), subthreshold swing (SS), on-off ratio, and off-state leakage current, with maximum enhancement percentage of 18.3% for I\u0000<sub>DMAX</sub>\u0000, 3758% for on-off ratio, and 54.3% for SS. Moreover, this study compared the recess depths of metal-insulator-semiconductor high-electron-mobility transistors (MIS-HEMTs) with the SiN dielectric layer. The results showed that MIS-HEMTs exhibit more negative V\u0000<sub>th</sub>\u0000 values, which can be attributed to the controlled surface states achieved through passivation.","PeriodicalId":446,"journal":{"name":"IEEE Open Journal of Nanotechnology","volume":"4 ","pages":"150-155"},"PeriodicalIF":1.7,"publicationDate":"2023-08-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10223256","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"62889594","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The ever increasing field of application of nanodielectrics in electrical insulations calls for description of the mechanisms underlying the performance of these systems and for identification of the signs exposing their aging under high electric fields. Such approach is of particular interest to electrically insulating polymers because their chemical defects are of deleterious nature for their electrical properties and can largely degrade their performance at high electric fields. Although these defects usually leave spectroscopic signatures in terms of characteristic luminescence peaks, it is nontrivial to assign, in an unambiguous way, the identified peaks to specific chemical groups or defects because of the low intensity of the signal with the main reason being that the insulating polymers are weakly emitting materials under electric field. In this work, we go beyond the conventional electroluminescence technique to record spectroscopic features of insulating polymers. By introducing a single plane of silver nanoparticles (AgNPs) at the near-surface of thin polypropylene films, the electroluminescent signal is strongly enhanced by surface plasmons processes. The presence of AgNPs leads not only to a much higher electroluminescence intensity but also to a strong decrease of the electric field threshold for detection of light emission and to a phase-stabilization of the recorded spectra, thus improving the assignment of the characteristic luminescence peaks. Besides, the performed analyses bring evidence on the capability of AgNPs to trap and eject charges, and on the possibility to adjust the energetics of charge carriers in electrically insulating polymers at the electrode/dielectric contact via AgNPs.
{"title":"Tailoring by AgNPs of the Energetics of Charge Carriers in Electrically Insulating Polymers at the Electrode/Dielectric Contact","authors":"Kremena Makasheva;Christina Villeneuve-Faure;Adriana Scarangella;Luca Montanari;Laurent Boudou;Gilbert Teyssedre","doi":"10.1109/OJNANO.2023.3284201","DOIUrl":"https://doi.org/10.1109/OJNANO.2023.3284201","url":null,"abstract":"The ever increasing field of application of nanodielectrics in electrical insulations calls for description of the mechanisms underlying the performance of these systems and for identification of the signs exposing their aging under high electric fields. Such approach is of particular interest to electrically insulating polymers because their chemical defects are of deleterious nature for their electrical properties and can largely degrade their performance at high electric fields. Although these defects usually leave spectroscopic signatures in terms of characteristic luminescence peaks, it is nontrivial to assign, in an unambiguous way, the identified peaks to specific chemical groups or defects because of the low intensity of the signal with the main reason being that the insulating polymers are weakly emitting materials under electric field. In this work, we go beyond the conventional electroluminescence technique to record spectroscopic features of insulating polymers. By introducing a single plane of silver nanoparticles (AgNPs) at the near-surface of thin polypropylene films, the electroluminescent signal is strongly enhanced by surface plasmons processes. The presence of AgNPs leads not only to a much higher electroluminescence intensity but also to a strong decrease of the electric field threshold for detection of light emission and to a phase-stabilization of the recorded spectra, thus improving the assignment of the characteristic luminescence peaks. Besides, the performed analyses bring evidence on the capability of AgNPs to trap and eject charges, and on the possibility to adjust the energetics of charge carriers in electrically insulating polymers at the electrode/dielectric contact via AgNPs.","PeriodicalId":446,"journal":{"name":"IEEE Open Journal of Nanotechnology","volume":"4 ","pages":"133-149"},"PeriodicalIF":1.7,"publicationDate":"2023-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/8782713/10007543/10146436.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3516656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Convolutional neural networks (CNNs) offer potentially a better accuracy alternative for conventional deep learning tasks. The hardware implementation of CNN functionalities with conventional CMOS based devices still lags in area and energy efficiency. This has necessitated the investigations of unconventional devices, circuits, and architectures to efficiently mimic the functionality of neurons and synapses for neuromorphic applications. Spin-orbit torque magnetic tunnel junction (SOT-MTJ) device is capable of achieving energy and area efficient rectified linear unit (ReLU) activation functionality. This work utilizes the SOT-MTJ based ReLU for activation and max-pooling in a single unit to eliminate the need of dedicated hardware for pooling layer. Moreover, 2 × 2 multiply-accumulate-activate-pool (MAAP) is implemented by using four activation pairs each of which is fed by the crossbar output. The presented approach has been used to implement various CNN architectures and evaluated for CIFAR-10 image classification. The number of read/write operations reduce significantly by 2X in MAAP based CNN architectures. The results show that the area and energy in MAAP based CNN is improved by at least 25% and 82.9%, respectively, when compared with conventional CNN designs.
{"title":"Energy Efficient Spin-Based Implementation of Neuromorphic Functions in CNNs","authors":"Sandeep Soni;Gaurav Verma;Hemkant Nehete;Brajesh Kumar Kaushik","doi":"10.1109/OJNANO.2023.3261959","DOIUrl":"https://doi.org/10.1109/OJNANO.2023.3261959","url":null,"abstract":"Convolutional neural networks (CNNs) offer potentially a better accuracy alternative for conventional deep learning tasks. The hardware implementation of CNN functionalities with conventional CMOS based devices still lags in area and energy efficiency. This has necessitated the investigations of unconventional devices, circuits, and architectures to efficiently mimic the functionality of neurons and synapses for neuromorphic applications. Spin-orbit torque magnetic tunnel junction (SOT-MTJ) device is capable of achieving energy and area efficient rectified linear unit (ReLU) activation functionality. This work utilizes the SOT-MTJ based ReLU for activation and max-pooling in a single unit to eliminate the need of dedicated hardware for pooling layer. Moreover, 2 × 2 multiply-accumulate-activate-pool (MAAP) is implemented by using four activation pairs each of which is fed by the crossbar output. The presented approach has been used to implement various CNN architectures and evaluated for CIFAR-10 image classification. The number of read/write operations reduce significantly by 2X in MAAP based CNN architectures. The results show that the area and energy in MAAP based CNN is improved by at least 25% and 82.9%, respectively, when compared with conventional CNN designs.","PeriodicalId":446,"journal":{"name":"IEEE Open Journal of Nanotechnology","volume":"4 ","pages":"102-108"},"PeriodicalIF":1.7,"publicationDate":"2023-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/8782713/10007543/10081384.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3516685","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-13DOI: 10.1109/OJNANO.2023.3256410
Shobhit Kareer;Jeongwon Park
The performance of silicon-based transistors is reaching its limit, and new materials like carbon nanotubes (CNTs) have started emerging to replace them in electronic products. However, the precise manipulation of CNTs requires complicated techniques, which increases process variation. These variations can lead to a decrease in the overall yield of the field-effect transistor (FET). This study shows how a low-frequency signal may regulate the number of CNTs on electrodes with a nanometer scale. We also demonstrate using an interdigitated electrode to reduce the shorts caused by metallic CNTs. The fabricated CNFETs were characterized using SEM, AFM, and I-V measurements. The study also demonstrates how the duration and amplitude of the applied signal impact the density of CNTs on the electrodes. Finally, finite element analysis was used to evaluate the electric field parameters during DEP. This technique will lead to precise CNTs per unit area, which can help fabricate transistors, sensors, and other electronic components.
{"title":"Metallic CNT Tolerant Field Effect Transistor Using Dielectrophoresis","authors":"Shobhit Kareer;Jeongwon Park","doi":"10.1109/OJNANO.2023.3256410","DOIUrl":"https://doi.org/10.1109/OJNANO.2023.3256410","url":null,"abstract":"The performance of silicon-based transistors is reaching its limit, and new materials like carbon nanotubes (CNTs) have started emerging to replace them in electronic products. However, the precise manipulation of CNTs requires complicated techniques, which increases process variation. These variations can lead to a decrease in the overall yield of the field-effect transistor (FET). This study shows how a low-frequency signal may regulate the number of CNTs on electrodes with a nanometer scale. We also demonstrate using an interdigitated electrode to reduce the shorts caused by metallic CNTs. The fabricated CNFETs were characterized using SEM, AFM, and I-V measurements. The study also demonstrates how the duration and amplitude of the applied signal impact the density of CNTs on the electrodes. Finally, finite element analysis was used to evaluate the electric field parameters during DEP. This technique will lead to precise CNTs per unit area, which can help fabricate transistors, sensors, and other electronic components.","PeriodicalId":446,"journal":{"name":"IEEE Open Journal of Nanotechnology","volume":"4 ","pages":"95-101"},"PeriodicalIF":1.7,"publicationDate":"2023-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/8782713/10007543/10068299.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3515774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-03-08DOI: 10.1109/OJNANO.2023.3273921
Bohua Zhang;Xiaoning Jiang
Nanoparticles containing thrombolytic medicines have been developed for thrombolysis applications in response to the increasing demand for effective, targeted treatment of thrombosis disease. In recent years, there has been a great deal of interest in nanoparticles that can be navigated and driven by a magnetic field. However, there are few review publications concerning the application of magnetic nanoparticles in thrombolysis. In this study, we examine the current state of magnetic nanoparticles in the application of in vitro and in vivo thrombolysis under a static or dynamic magnetic field, as well as the combination of magnetic nanoparticles with an acoustic field for dual-mode thrombolysis. We also discuss four primary processes of magnetic nanoparticles mediated thrombolysis, including magnetic nanoparticle targeting, magnetic nanoparticle trapping, magnetic drug release, and magnetic rupture of blood clot fibrin networks. This review will offer unique insights for the future study and clinical development of magnetic nanoparticles mediated thrombolysis approaches.
{"title":"Magnetic Nanoparticles Mediated Thrombolysis–A Review","authors":"Bohua Zhang;Xiaoning Jiang","doi":"10.1109/OJNANO.2023.3273921","DOIUrl":"https://doi.org/10.1109/OJNANO.2023.3273921","url":null,"abstract":"Nanoparticles containing thrombolytic medicines have been developed for thrombolysis applications in response to the increasing demand for effective, targeted treatment of thrombosis disease. In recent years, there has been a great deal of interest in nanoparticles that can be navigated and driven by a magnetic field. However, there are few review publications concerning the application of magnetic nanoparticles in thrombolysis. In this study, we examine the current state of magnetic nanoparticles in the application of \u0000<italic>in vitro</i>\u0000 and \u0000<italic>in vivo</i>\u0000 thrombolysis under a static or dynamic magnetic field, as well as the combination of magnetic nanoparticles with an acoustic field for dual-mode thrombolysis. We also discuss four primary processes of magnetic nanoparticles mediated thrombolysis, including magnetic nanoparticle targeting, magnetic nanoparticle trapping, magnetic drug release, and magnetic rupture of blood clot fibrin networks. This review will offer unique insights for the future study and clinical development of magnetic nanoparticles mediated thrombolysis approaches.","PeriodicalId":446,"journal":{"name":"IEEE Open Journal of Nanotechnology","volume":"4 ","pages":"109-132"},"PeriodicalIF":1.7,"publicationDate":"2023-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/8782713/10007543/10120760.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3516978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-03DOI: 10.1109/OJNANO.2023.3238959
Yu Xinge
The papers in this special section focus on materials and devices for flexible sensors. Presents recent advances in skin electronics, touch sensors for flexible display, near-infrared spectroscopy (NIRS) and organic electrochemical transistors (OECT), respectively. Three research article introduces new methods in flexible pressure sensing array, ammonia sensors and charge plasma junctionless tunnel field effect transistor (CP JLTFET), respectively.
{"title":"Guest Editorial: Materials & Devices for Advanced Flexible Sensors","authors":"Yu Xinge","doi":"10.1109/OJNANO.2023.3238959","DOIUrl":"https://doi.org/10.1109/OJNANO.2023.3238959","url":null,"abstract":"The papers in this special section focus on materials and devices for flexible sensors. Presents recent advances in skin electronics, touch sensors for flexible display, near-infrared spectroscopy (NIRS) and organic electrochemical transistors (OECT), respectively. Three research article introduces new methods in flexible pressure sensing array, ammonia sensors and charge plasma junctionless tunnel field effect transistor (CP JLTFET), respectively.","PeriodicalId":446,"journal":{"name":"IEEE Open Journal of Nanotechnology","volume":"4 ","pages":"23-24"},"PeriodicalIF":1.7,"publicationDate":"2023-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/8782713/10007543/10036332.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3508121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-10DOI: 10.1109/OJNANO.2023.3234042
NORMAN J. M. HORING
We examine the question “Can Dirac materials exist in a nondegenerate statistical state?,” deriving and employing an identity for the thermodynamic Grand Potential $Omega$ (per unit volume/area) in the low density nondegenerate statistical regime, relating it to the density $n$ as $Omega = -beta ^{-1} n$ ( $beta ^{-1} = kappa _{B} T$ is thermal energy, $kappa _{B}$ is the Boltzmann constant, and $T$ is Kelvin temperature). The implications of this identity for Dirac materials are explored. The identity is universally valid for all thermodynamic systems in equilibrium in the nondegenerate, low density statistical regime, irrespective of size, dimensionality or applied static fields. Phenomena that may contribute to the realization of such a nondegenerate statistical equilibrium state in Dirac materials are discussed.
{"title":"Dirac Materials and an Identity for the Grand Potential of the Nondegenerate Statistical Thermodynamic Regime","authors":"NORMAN J. M. HORING","doi":"10.1109/OJNANO.2023.3234042","DOIUrl":"https://doi.org/10.1109/OJNANO.2023.3234042","url":null,"abstract":"We examine the question “Can Dirac materials exist in a nondegenerate statistical state?,” deriving and employing an identity for the thermodynamic Grand Potential \u0000<inline-formula><tex-math>$Omega$</tex-math></inline-formula>\u0000 (per unit volume/area) in the low density nondegenerate statistical regime, relating it to the density \u0000<inline-formula><tex-math>$n$</tex-math></inline-formula>\u0000 as \u0000<inline-formula><tex-math>$Omega = -beta ^{-1} n$</tex-math> </inline-formula>\u0000 (\u0000<inline-formula><tex-math>$beta ^{-1} = kappa _{B} T$</tex-math></inline-formula>\u0000 is thermal energy, \u0000<inline-formula><tex-math>$kappa _{B}$</tex-math></inline-formula>\u0000 is the Boltzmann constant, and \u0000<inline-formula><tex-math>$T$</tex-math></inline-formula>\u0000 is Kelvin temperature). The implications of this identity for Dirac materials are explored. The identity is universally valid for all thermodynamic systems in equilibrium in the nondegenerate, low density statistical regime, irrespective of size, dimensionality or applied static fields. Phenomena that may contribute to the realization of such a nondegenerate statistical equilibrium state in Dirac materials are discussed.","PeriodicalId":446,"journal":{"name":"IEEE Open Journal of Nanotechnology","volume":"4 ","pages":"77-80"},"PeriodicalIF":1.7,"publicationDate":"2023-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/8782713/10007543/10014530.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3496406","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Most greenhouse gases come from biological activities and industry which will lead to global warming and show an impact on human life. With the need of green transformation of the global economic structure and seeking for higher quality of human life, the detection and management of greenhouse gases, as well as most hazardous gases in the environment, are increasingly demanding. Applications in different fields require sensors that can detect gas volume fractions with magnitudes from 10–9 to 10–4. Greenhouse gas detection plays an important role both in the agriculture and industry field. In this review, we first summarize the mechanism of several common gas detectors used currently. Then, the advantages of nanostructured gas sensors are discussed. Finally, the applications of infrared gas sensors based on nanophotonic devices are described in detail. This review has been an outlook on the future development of infrared gas sensors based on nanophotonic devices.
{"title":"Greenhouse Gas Detection Based on Infrared Nanophotonic Devices","authors":"Chunhui Hao;Xiao Fu;Xiaoyong Jiang;Yutong Li;Juyi Sun;Haitao Wu;He Zhu;Qing Li;Yunhai Li;Zhangcheng Huang;Fang Zhong;Ting He;Jinshui Miao;Weida Hu","doi":"10.1109/OJNANO.2022.3233485","DOIUrl":"https://doi.org/10.1109/OJNANO.2022.3233485","url":null,"abstract":"Most greenhouse gases come from biological activities and industry which will lead to global warming and show an impact on human life. With the need of green transformation of the global economic structure and seeking for higher quality of human life, the detection and management of greenhouse gases, as well as most hazardous gases in the environment, are increasingly demanding. Applications in different fields require sensors that can detect gas volume fractions with magnitudes from 10–9 to 10–4. Greenhouse gas detection plays an important role both in the agriculture and industry field. In this review, we first summarize the mechanism of several common gas detectors used currently. Then, the advantages of nanostructured gas sensors are discussed. Finally, the applications of infrared gas sensors based on nanophotonic devices are described in detail. This review has been an outlook on the future development of infrared gas sensors based on nanophotonic devices.","PeriodicalId":446,"journal":{"name":"IEEE Open Journal of Nanotechnology","volume":"4 ","pages":"10-22"},"PeriodicalIF":1.7,"publicationDate":"2023-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/8782713/10007543/10009893.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3508119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper presents an approach to evaluate capacitance developed by perforated membrane of RF MEMS switch with high accuracy. An analytical model is developed for both upstate and downstate of switch by including parasitic and fringing field capacitance in parallel plate capacitance model. The proposed analytical model includes the ligament efficiency term directly in the formula which reduce the efforts to calculate it individually for various perforation sizes. The capacitance analysis has been carried out by varying the physical parameters to optimize the switch dimensions and these analytical results are compared with the simulation results carried out by 3D FEM tool COMSOL multiphysics for validation. The proposed analytical model results are then compared with benchmark models to understand the efficiency of proposed model in estimating the up and downstate capacitances. The proposed analytical model proved to be good with less error percentage of 2.13% at upstate and 2.59% at downstate whereas the other benchmark models gives greater than 5% error. The switch is then fabricated using 4-mask surface micromachining process and experimental evaluation of capacitance at both upstate and downstate is carried out by DC probe station. Experimentally, the upstate capacitance is obtained as 37.4 fF and downstate as 2.43 pF and the analytical models exhibited low error percentage of 3.95% at upstate and 2.05% at downstate condition for µ = 0.5.
{"title":"Modelling, Fabrication and Testing of RF Micro-Electro-Mechanical-Systems Switch","authors":"Srinivasa Rao Karumuri;P. Ashok Kumar;Girija Sravani Kondavitee;Aime Lay-Ekuakille","doi":"10.1109/OJNANO.2022.3232182","DOIUrl":"https://doi.org/10.1109/OJNANO.2022.3232182","url":null,"abstract":"This paper presents an approach to evaluate capacitance developed by perforated membrane of RF MEMS switch with high accuracy. An analytical model is developed for both upstate and downstate of switch by including parasitic and fringing field capacitance in parallel plate capacitance model. The proposed analytical model includes the ligament efficiency term directly in the formula which reduce the efforts to calculate it individually for various perforation sizes. The capacitance analysis has been carried out by varying the physical parameters to optimize the switch dimensions and these analytical results are compared with the simulation results carried out by 3D FEM tool COMSOL multiphysics for validation. The proposed analytical model results are then compared with benchmark models to understand the efficiency of proposed model in estimating the up and downstate capacitances. The proposed analytical model proved to be good with less error percentage of 2.13% at upstate and 2.59% at downstate whereas the other benchmark models gives greater than 5% error. The switch is then fabricated using 4-mask surface micromachining process and experimental evaluation of capacitance at both upstate and downstate is carried out by DC probe station. Experimentally, the upstate capacitance is obtained as 37.4 fF and downstate as 2.43 pF and the analytical models exhibited low error percentage of 3.95% at upstate and 2.05% at downstate condition for µ = 0.5.","PeriodicalId":446,"journal":{"name":"IEEE Open Journal of Nanotechnology","volume":"4 ","pages":"81-94"},"PeriodicalIF":1.7,"publicationDate":"2022-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/iel7/8782713/10007543/09999329.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"3515039","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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