IEEE Journal on Flexible Electronics最新文献_第9页

Influence of Electrode Thickness on Contact Resistance in Solution-Processed Organic Field-Effect Transistors 溶液处理有机场效应晶体管中电极厚度对接触电阻的影响

IEEE Journal on Flexible Electronics Pub Date : 2025-08-06 DOI: 10.1109/JFLEX.2025.3596536

Fiheon Imroze;Sanjoy Jena;Soumya Dutta

引用次数: 0

Compact XNOR Gate Using Flexible Oxide TFT Technology 采用柔性氧化物TFT技术的紧凑XNOR栅极

IEEE Journal on Flexible Electronics Pub Date : 2025-08-04 DOI: 10.1109/JFLEX.2025.3595525

Mayana Yousuf Ali Khan;Pydi Ganga Bahubalindruni;Phani Kumar Peddibhotla;Gopika G. Pillai;Ashutosh Kumar Tripathi

{"title":"Compact XNOR Gate Using Flexible Oxide TFT Technology","authors":"Mayana Yousuf Ali Khan;Pydi Ganga Bahubalindruni;Phani Kumar Peddibhotla;Gopika G. Pillai;Ashutosh Kumar Tripathi","doi":"10.1109/JFLEX.2025.3595525","DOIUrl":"https://doi.org/10.1109/JFLEX.2025.3595525","url":null,"abstract":"This article presents a novel compact <sc>xnor gate, which is fabricated using unipolar single-gate n-type oxide thin-film transistors (TFTs) at low temperatures (<inline-formula> <tex-math>$leq $ </tex-math></inline-formula>150 °C). The proposed two-input <sc>xnor gate utilizes only two driving transistors and an active load (a diode-connected transistor), significantly reducing power consumption, design complexity, and active area. In contrast, implementing a conventional two-input <sc>xnor gate with unipolar transistor technology typically requires four two-input <sc>nor gates, which need at least 12 transistors. For a fair comparison, a traditional two-input <sc>nor gate is characterized under identical conditions. Measurement response indicates that both gates exhibit similar power consumption (~1.5 mW) and operating frequency (75 kHz) under normal ambient conditions. These findings highlight that the <sc>xnor gate achieves its functionality with almost one-fourth of the circuit complexity compared to a traditional design without compromising other performance metrics, such as speed and power consumption.","PeriodicalId":100623,"journal":{"name":"IEEE Journal on Flexible Electronics","volume":"4 10","pages":"399-404"},"PeriodicalIF":0.0,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145374725","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}

引用次数: 0

An Open-Source Tool for FEM Modeling of Bent Flexible Circuits 弯曲柔性电路有限元建模的开源工具

IEEE Journal on Flexible Electronics Pub Date : 2025-07-31 DOI: 10.1109/JFLEX.2025.3594658

Nico Arnold;Andreas Krinke;Manfred Dietrich;Jens Lienig

{"title":"An Open-Source Tool for FEM Modeling of Bent Flexible Circuits","authors":"Nico Arnold;Andreas Krinke;Manfred Dietrich;Jens Lienig","doi":"10.1109/JFLEX.2025.3594658","DOIUrl":"https://doi.org/10.1109/JFLEX.2025.3594658","url":null,"abstract":"Predicting the properties of flexible printed circuits (FPCs) before production is a significant challenge in their development. Traditional design flows model FPCs in a flat state, yet simulations of the actual bent shape of the circuits are required in forecasting their final, real-world behavior. Currently, only proprietary tools are available for simulating these 3-D geometries, with no open-source alternatives. This article introduces a novel open-source software tool that bridges this gap by transforming 2-D layout data from KiCad files into 3-D bent meshes ready for simulation. Initially, retrieved geometries are rendered according to a predefined stackup. To enable a seamless simulation workflow, the geometries must then undergo preprocessing, meshing, and labeling. This article significantly extends an earlier published algorithm by: 1) supporting more bend shapes and 2) eliminating dependencies on external programs for geometry generation, omitting the necessity to do the meshing manually, and generating physical groups. These steps are now integrated in our tool, facilitating automatic mesh generation from layout files in a single step. Consequently, the software generates ready-to-use finite element method (FEM) meshes for external simulators, thus supporting a comprehensive open-source design and verification workflow. This work not only enhances the accessibility of FPC design and simulation but also underscores the broader applicability of open-source solutions for printed circuit board (PCB) design.","PeriodicalId":100623,"journal":{"name":"IEEE Journal on Flexible Electronics","volume":"4 8","pages":"333-341"},"PeriodicalIF":0.0,"publicationDate":"2025-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236668","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}

引用次数: 0

IEEE Journal on Flexible Electronics Publication Information IEEE柔性电子出版信息杂志

IEEE Journal on Flexible Electronics Pub Date : 2025-07-30 DOI: 10.1109/JFLEX.2025.3588646

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Selective Impedimetric Laser-Induced Graphene Sensor for Glucose Detection 选择性阻抗激光诱导石墨烯传感器葡萄糖检测

IEEE Journal on Flexible Electronics Pub Date : 2025-07-23 DOI: 10.1109/JFLEX.2025.3591420

Sonia Gómez-Gijón;Isabel Blasco-Pascual;Yann Houeix;Álvaro García-Ávila;Alfonso Salinas-Castillo;Francisco J. Romero;Almudena Rivadeneyra

{"title":"Selective Impedimetric Laser-Induced Graphene Sensor for Glucose Detection","authors":"Sonia Gómez-Gijón;Isabel Blasco-Pascual;Yann Houeix;Álvaro García-Ávila;Alfonso Salinas-Castillo;Francisco J. Romero;Almudena Rivadeneyra","doi":"10.1109/JFLEX.2025.3591420","DOIUrl":"https://doi.org/10.1109/JFLEX.2025.3591420","url":null,"abstract":"This work presents a novel approach to the fabrication of interdigitated electrodes (IDEs) using flexible polymer substrates. Two substrates, polyimide (PI) and polyetherimide (PEI), are compared alongside two manufacturing techniques: direct laser tracing and silver-ink printing. The IDEs produced are applied to the detection of glucose and salt content in biological samples through impedance measurements. The analysis of impedance response enables the quantification of the relationship between signal magnitude and analyte concentration for both sensors and solutions, allowing for the estimation of unknown concentrations based on measured impedance values. The results obtained demonstrate the potential of the manufactured electrodes for noninvasive biosensing applications. This study highlights the sensitivity of these sensors for detecting glucose concentrations in the range of hypoglycemia and hyperglycemia (0.7–1.8 mg/mL) and salt content, revealing their potential for use in real-time monitoring of important biological parameters. To further enhance analyte discrimination, an equivalent circuit model has been developed to describe the system’s electrical behavior, enabling effective differentiation between glucose and salt solutions. The findings suggest that the combination of flexible, low-cost substrates, and impedance-based detection holds promise for advancing personalized health monitoring technologies, particularly for glucose and electrolyte balance.","PeriodicalId":100623,"journal":{"name":"IEEE Journal on Flexible Electronics","volume":"4 8","pages":"350-357"},"PeriodicalIF":0.0,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11091359","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236689","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}

引用次数: 0

Flexible Resistive Strain Sensor Based on PDMS-Coated MWCNTs and MWCNTs/GNP for Wrist Pulse and Respiration Monitoring 基于pdms包覆MWCNTs和MWCNTs/GNP的腕部脉搏和呼吸监测柔性电阻应变传感器

IEEE Journal on Flexible Electronics Pub Date : 2025-07-22 DOI: 10.1109/JFLEX.2025.3591416

Puneet Sharma;Suraj Baloda;Deepak Verma;Vijay Janyani;Ritu Sharma;Navneet Gupta

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Enabling Proprioception in Multistable Soft Machines Through Embedded Soft Capacitive Sensors 通过嵌入式软电容传感器实现多稳定软机器的本体感觉

IEEE Journal on Flexible Electronics Pub Date : 2025-07-17 DOI: 10.1109/JFLEX.2025.3589993

Hugo de Souza Oliveira;Xin Li;Niloofar Saeedzadeh Khaanghah;Niko Münzenrieder;Edoardo Milana

{"title":"Enabling Proprioception in Multistable Soft Machines Through Embedded Soft Capacitive Sensors","authors":"Hugo de Souza Oliveira;Xin Li;Niloofar Saeedzadeh Khaanghah;Niko Münzenrieder;Edoardo Milana","doi":"10.1109/JFLEX.2025.3589993","DOIUrl":"https://doi.org/10.1109/JFLEX.2025.3589993","url":null,"abstract":"Transforming soft machines into fully autonomous soft robots capable of complex interactions with the environment requires the integration of soft electronics and sensors, enabling feedback control while preserving mechanical compliance. Multistable mechanisms, such as mechanical metamaterials and snapping beams, are great candidates for such systems due to their programmable nonlinear responses. In this work, we introduce the integration of a sensing technology based on 3D-printed soft capacitive sensor in a 3-D-printed multistable metastructure composed of four bistable unit cells—enabling proprioceptive monitoring of state transitions by detecting snap-through events in multistable mechanisms. Under cyclic tensile loading, the metastructure exhibits snapping events at forces up to 7 N, accompanied by capacitance changes from about 0.025 to 0.750 pF. We further demonstrate the integration of the same sensing principle in a 3-D-printed monolithic bistable soft gripper, reliably grasping delicate objects such as popcorns, tomatoes, and strawberries, spanning masses from 0.5 to 16 g. These results confirm that embedded capacitive soft sensors are a viable technology to detect snap-through transitions and to be seamlessly integrated in soft structures, representing a crucial step toward fully compliant, self-aware robotic systems.","PeriodicalId":100623,"journal":{"name":"IEEE Journal on Flexible Electronics","volume":"4 8","pages":"324-332"},"PeriodicalIF":0.0,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11083606","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236686","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}

引用次数: 0

IEEE Journal on Flexible Electronics Publication Information IEEE柔性电子出版信息杂志

IEEE Journal on Flexible Electronics Pub Date : 2025-07-10 DOI: 10.1109/JFLEX.2025.3584174

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Guest Editorial Special Issue on Circular, Sustainable, and Green Electronics 《循环、可持续和绿色电子》特刊特邀编辑

IEEE Journal on Flexible Electronics Pub Date : 2025-07-10 DOI: 10.1109/JFLEX.2025.3573112

Giuseppe Cantarella;Sara Carniello;Clara Santato;Shree Prakash Tiwari

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Remote R-Peak Detection in Single-Lead ECG Chest Monitors Using Clustering Classification and Laser-Induced Graphene Electrodes 基于聚类分类和激光诱导石墨烯电极的单导联心电图胸部监护仪远程r峰检测

IEEE Journal on Flexible Electronics Pub Date : 2025-07-07 DOI: 10.1109/JFLEX.2025.3586821

Denice Gerardo;Yann Houeix;Álvaro García-Ávila;Víctor Toral;Encarnación Castillo;Almudena Rivadeneyra;Francisco J. Romero

{"title":"Remote R-Peak Detection in Single-Lead ECG Chest Monitors Using Clustering Classification and Laser-Induced Graphene Electrodes","authors":"Denice Gerardo;Yann Houeix;Álvaro García-Ávila;Víctor Toral;Encarnación Castillo;Almudena Rivadeneyra;Francisco J. Romero","doi":"10.1109/JFLEX.2025.3586821","DOIUrl":"https://doi.org/10.1109/JFLEX.2025.3586821","url":null,"abstract":"This study presents a complete system for remote single-lead electrocardiogram (ECG) monitoring using a wearable device equipped with dry laser-induced graphene (LIG) electrodes. First, we evaluated the feasibility of LIG electrodes for chest ECG acquisition across different volunteers and overextended recording periods. After that, a simple algorithm for R-peak detection was developed and validated using the acquired signals. This algorithm implemented using open-source libraries in Python, consists of two optimized stages. In the first stage, the ECG signal is preprocessed using the discrete wavelet transform (DWT) to remove the baseline wandering and denoise the signal. Second, a clustering-based algorithm classifies the different peaks in the ECG signal into two clusters based on their amplitude range. It is demonstrated that, despite the interindividual variability in ECG waveforms, the proposed algorithm effectively identifies the R-peaks with high accuracy without requiring the specific cardiac profile for each individual patient, thus ensuring a reliable and robust heart rate (HR) monitoring. Finally, we showcase the potential of integrating novel wearable ECG monitoring systems with advanced sensors and signal processing techniques by a near real-time remote ECG monitoring setup.","PeriodicalId":100623,"journal":{"name":"IEEE Journal on Flexible Electronics","volume":"4 8","pages":"342-349"},"PeriodicalIF":0.0,"publicationDate":"2025-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11072480","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145236704","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}

引用次数: 0