Review
Chemistry, Physical
Xinglei Tao, Shenglong Liao, Yapei Wang
Summary: This article summarizes recent research progress on recyclable electronic sensors, including sensors with self-healing or recyclable properties and new types of recyclable sensors. The article specifically discusses the design principles, recycling procedures, and sensing performance of these sensors, aiming to inspire the development of more fully recyclable electronic sensors with versatile functions.
Article
Chemistry, Multidisciplinary
Ashuya Takemoto, Teppei Araki, Kazuya Nishimura, Mihoko Akiyama, Takafumi Uemura, Kazuki Kiriyama, Johan M. Koot, Yuko Kasai, Naoko Kurihira, Shuto Osaki, Shin-ichi Wakida, Jaap M. J. den Toonder, Tsuyoshi Sekitani
Summary: Fully transparent, ultrathin, and flexible organic electrochemical transistors (OECTs) were successfully developed using the additive integration processes of selective-wetting deposition and thermally bonded lamination. These OECTs demonstrate high visible transmittance and high transconductance, with low-voltage operations. EEG acquisition and nitrate ion sensing can be performed while wearing the transparent OECTs, and simultaneous assessments of optical blood flowmetry are also compatible.
Review
Chemistry, Multidisciplinary
Tugce Delipinar, Atia Shafique, Maryam Sepehri Gohar, Murat Kaya Yapici
Summary: Humidity measurements have gained widespread attention in various applications, with a focus on developing innovative sensing modalities, process technologies, and new materials integration to enable cost-effective, robust, and flexible humidity sensors. This review paper provides an overview of flexible humidity sensors based on different sensing mechanisms, and discusses critical device design parameters and specific applications and use cases.
Article
Materials Science, Multidisciplinary
Jan Zavodnik, Yunbo Wang, Wenzhong Yan, Miha Brojan, Mohammad Khalid Jawed
Summary: A new class of thin flexible structures that can transform from flat to prescribed 3D shapes is introduced. By utilizing strain mismatch and kirigami cuts, control over the target shape can be achieved. The concept is demonstrated through circular composite plates, and the tools developed can be extended to attain arbitrary 3D shapes.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Review
Chemistry, Physical
Roman A. Surmenev, Roman Chernozem, Igor O. Pariy, Maria A. Surmeneva
Summary: This review highlights the recent advances in using AAO membranes as templates to prepare PVDF or PVDF-TrFE piezoelectric generators, showcasing the significant improvement in energy harvesting and sensing performances on nanoand micropillars compared to flat films. The study suggests that nanoand microstructuring of biocompatible piezopolymers holds promise for applications in various devices such as biosensors, piezoelectric generators, smart drug-delivery systems, and multiferroic systems.
Article
Engineering, Electrical & Electronic
Qifan Ding, Huyue Chen, Jiahao Wu, Tianxiang Zheng, Wen-Ming Zhang, Lei Shao
Summary: In this paper, a molding-free full-printing method for flexible tactile sensors was proposed and verified. The method offers a fast, low-cost, and reliable way to fabricate sensors with performance comparable or even better than those made with slow and expensive molding processes. The sensors show high sensitivity for low pressures and can detect a wide pressure range. The method also allows for the fabrication of diverse flexible devices.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Pavlo Makushko, Eduardo Sergio Oliveros Mata, Gilbert Santiago Canon Bermudez, Mariam Hassan, Sara Laureti, Christian Rinaldi, Federico Fagiani, Gianni Barucca, Nataliia Schmidt, Yevhen Zabila, Tobias Kosub, Rico Illing, Oleksii Volkov, Igor Vladymyrskyi, Jurgen Fassbender, Manfred Albrecht, Gaspare Varvaro, Denys Makarov
Summary: The new technology utilizes flexible switches for the development of on-skin touchless interactive electronics, which are sensitive to out-of-plane magnetic fields, have momentary and latching switch functions, and maintain performance even when bent.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Huayu Luo, Gaoyang Pang, Kaichen Xu, Zhiqiu Ye, Huayong Yang, Geng Yang
Summary: The fully printed flexible trimodal sensor sheet integrates pressure, temperature, and proximity sensor units, with a sophisticated structure that is easy to fabricate and can suppress crosstalk and mutual interference, providing dual-level detection capability and saving power consumption.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Review
Chemistry, Multidisciplinary
Tomoyuki Yokota, Kenjiro Fukuda, Takao Someya
Summary: Flexible image sensors are gaining attention as new imaging devices due to their lightness, softness, and bendability. They offer high-accuracy continuous biometric information measurement directly attached to curved surfaces like skin, with potential applications in wearable devices and home medical care. The individual components, performance evaluation parameters, and real-world measurement cases of these sensors in the biomedical field are discussed.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Kirill Keller, Christoph Leitner, Christian Baumgartner, Luca Benini, Francesco Greco
Summary: We present the fabrication of a fully printed, lead-free, polymer piezoelectric transducer and demonstrate the characterization of its structural, dielectric, and ferroelectric properties at different processing stages. The performance of the transducer made with poly(vinylidene fluoride-trifluoroethylene) is evaluated through resonance frequency analyses, acoustic power measurements, and pulse-echo experiments. Importantly, we demonstrate an optimal performance in the medical ultrasound range (<15 MHz) with acoustic power >1 W cm(-2) for the first time in a fully printed transducer, which shows promise for applications in epidermal and wearable electronics. Overall, these findings lay a strong foundation for future research in the field of flexible ultrasound transducers.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Materials Science, Multidisciplinary
Marc Alique, Claudia Delgado Simao, Gonzalo Murillo, Ana Moya
Summary: Recent advancements in materials and manufacturing processes have enabled the development of printed piezoelectric materials for use as flexible sensors, actuators, and generators. Key focus is on the lightweight, flexible, and high throughput manufacturing capabilities, providing disruptive advantages in integration technologies and cost-effective applications. However, challenges remain in the production of reliable flexible printed piezoelectric devices, with limitations mainly stemming from the production and processing of piezoelectric inks.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Multidisciplinary Sciences
Matthew S. Brown, Louis Somma, Melissa Mendoza, Yeonsik Noh, Gretchen J. Mahler, Ahyeon Koh
Summary: This study presents a method to upcycle compact discs into flexible and stretchable bio-electronics, providing a sustainable solution to the global issue of electronic waste.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Cong Zhao, Taili Du, Bin Ge, Ziyue Xi, Zian Qian, Yawei Wang, Junpeng Wang, Fangyang Dong, Dianlong Shen, Zhenhao Zhan, Minyi Xu
Summary: This article introduces a flexible fiber-shaped triboelectric nanogenerator (F-TENG) for self-powered vibration sensing. The sensor exhibits high adaptability and sensitivity, and with the assistance of deep learning, it is capable of accurately identifying and monitoring the operational conditions of the system.
Review
Chemistry, Multidisciplinary
Chun Zhao, Yanjie Wang, Gangqiang Tang, Jie Ru, Zicai Zhu, Bo Li, Chuan Fei Guo, Lijie Li, Denglin Zhu
Summary: This review comprehensively reviews the sensing mechanisms, compositions, structural design, and applications of ionic flexible sensors (IFS). With the development of novel ionic materials, structural designs, and biomimetic approaches, IFS can replicate the topological structures of human skin and achieve tactile perception functions similar to that of human skin. IFS have a wide range of applications in artificial skin, human-interactive technologies, wearable health monitors, and other related fields.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Hongqiang Li, Zhixuan An, Sai Zhang, Shasha Zuo, Wei Zhu, Shanshan Zhang, Beiju Huang, Lu Cao, Cheng Zhang, Zanyun Zhang, Wenchao Song, Quanhua Mao, Yuxin Mu, Changyun Miao, Enbang Li, J. Daniel Prades
Summary: The research presented the first fully integrated optical interrogator for the continuous, dynamic, and long-term acquisition of human physiological signals, with the ability to detect body temperature and heart sounds in a wristband. This paves the way for the development of watch-sized integrated wearable optical interrogators with potential applications in health monitoring.
Article
Nanoscience & Nanotechnology
Tamal Dey, Arup Ghorai, Soumen Das, Samit K. Ray
Summary: Phosphor-converted LEDs (pc-LEDs) are considered as a promising solid-state lighting source for next-generation display technologies. However, the current production technique for white LEDs often results in high correlated color temperature and low color rendering index values. To overcome this limitation, researchers have demonstrated the use of blue and green-emitting nitrogen-functionalized graphene quantum dots (GQDs) coupled with red-emitting CsPbI3 nanocrystals for phosphor-based LED applications. This approach significantly improves the color rendering index and luminous efficiency of the LEDs, surpassing established benchmarks.
Article
Computer Science, Cybernetics
Anshita Gupta, Sudip Misra, Nidhi Pathak, Debanjan Das
Summary: This study proposes an edge-based federated learning framework for resource-constrained devices. It introduces a split learning phase to enable collaboratively training between stragglers and edge nodes, reducing video training time and improving system performance.
IEEE TRANSACTIONS ON COMPUTATIONAL SOCIAL SYSTEMS
(2023)
Article
Engineering, Electrical & Electronic
Deepraj Chowdhury, Aparna Sinha, Debanjan Das
Summary: This study proposes a data-driven approach for diagnosing faults in 3D printers. By collecting data for three scenarios - healthy condition, bed failure, and arm failure - an ensemble learning model of Random Forest and XGBoost achieves an accuracy of 99.75%. The interpretation of the model is improved using the Shapley additive explanations library.
IEEE SENSORS LETTERS
(2023)
Article
Oncology
Moumita Kundu, Subhayan Das, Chandan Kanta Das, Gaurav Kulkarni, Soumen Das, Dibakar Dhara, Mahitosh Mandal
Summary: Glioma is difficult to treat due to its invasive nature and the blood-brain barrier. This study discovered that Magnolol, a neolignan, plays an important role in inducing apoptosis and modulating autophagy in glioma cells. The study also found that Magnolol inhibits the PI3K/AKT/mTOR pathway to induce autophagy. The results suggest that Magnolol could be a promising therapeutic agent for glioma management.
EXPERIMENTAL CELL RESEARCH
(2023)
Article
Chemistry, Physical
Jyotsana Priyadarshani, Prasoon Awasthi, Soumen Das, Suman Chakraborty
Summary: A liquid filament can separate into different shapes on a soft surface due to the interplay of inertial, capillary, and viscous forces. However, controlling the precise and stable morphological features of complex materials like soft gel filaments remains challenging. We propose a new method using thermally regulated instabilities to fabricate gel microbeads with precise control over their morphology and hydration state, resulting in topologically-selective microbeads.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Physics, Applied
Shreyasi Das, Arup Ghorai, Sourabh Pal, Somnath Mahato, Soumen Das, Samit K. Ray
Summary: This study reports a hybrid heterostructure-based photo-field-effect transistor with air-stable cesium lead iodide/tungsten di-sulfide mixed-dimensional heterostructure. The device exhibits extremely low dark current and high sensitivity photodetection, achieved through the rectification characteristics induced by the WS2/Au interface and the photogating effect from alpha-phase CsPbI3 nanocrystal sensitizer. Furthermore, the device shows superior performance under high-humidity conditions due to the formation of cubic alpha-phase CsPbI3 nanocrystals and the protection from environmental degradation provided by the WS2 layer.
PHYSICAL REVIEW APPLIED
(2023)
Article
Nanoscience & Nanotechnology
Arijit Pal, Souvik Biswas, Koel Chaudhury, Soumen Das
Summary: The sensing behavior of a MoS2-functionalized paper sensor towards dopamine was investigated using theoretical analysis, experimental validation, and machine learning-driven predictive modeling. The suitability of MoS2 for detecting dopamine was confirmed through density functional theory. Theoretical analysis revealed the physisorption behavior and electrostatic interaction of dopamine on MoS2, while experimental results confirmed the alteration in dopamine's oxidation potential. The developed sensor showed high accuracy in detecting dopamine in serum samples, with an average accuracy of over 96% and a detection limit of 10 nM. Implementation of a machine-intelligent web app interface further improved the sensing platform's resolution and accuracy to nearly 99%.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Thermodynamics
Aparna Sinha, Debanjan Das, Suneel Kumar Palavalasa
Summary: The coal-fired boiler often faces multiple problems such as corrosion, slagging, fouling, and clinkering. Existing research lacks focus on clinkering prediction for 500 MW CFBs, and feature selection is based on operator experience. To address this, a data-driven-based predictive maintenance method called dClink is proposed, which uses automated feature selection to predict clinkering based on real-time process parameters. The method has shown high accuracy in detecting clinkering faults and predicting clinkering to prevent accidents, low efficiency, and financial loss.
Article
Engineering, Electrical & Electronic
Aparna Sinha, Debanjan Das
Summary: An accurate and robust technique called SNRepair has been proposed for sensor fault diagnosis in the IoT network, which uses modified deep reinforcement learning (DRL) to detect different types of faults and self-calibrate the faulty sensors. The fault detection module achieves a 96.17% accuracy in identifying four types of faults, and the self-calibration module can calibrate the faulty sensors within seconds, ensuring uninterrupted availability of accurate monitoring information.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
Jyoti Prajapati, Debanjan Das, Venkanna Udutalapally, Rajarshi Mahapatra, Preetam Narayan Wasnik
Summary: This article proposes a smart jaundice diagnosis method using a smartphone camera to capture eye images and determine the bilirubin level. The model achieved high accuracy and sensitivity, and can be converted into a mobile application for continuous monitoring.
IEEE SENSORS JOURNAL
(2023)
Article
Engineering, Electrical & Electronic
G. Harish Gnanasambanthan, Debashis Maji
Summary: This study develops a flexible copper-based micro-electrode array (MEA) patch for electrical stimulation (ES)-based accelerated wound healing. Simulation results optimize ES for effective electric field-induced electrotaxis. A low-cost MEA patch with excellent electrical continuity, flexibility, and skin conformality is fabricated using a unique screen-printed masking technique. In experiments on a rat model, an optimized DC potential of 0.4 V significantly reduces the healing time (9 days) compared to the control group (13 days), demonstrating the effectiveness of the fabricated patch.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Computer Science, Cybernetics
Vaibhav Kotiyal, Anshita Gupta, Pallav Kumar Deb, Subhas Chandra Misra, Debanjan Das, Venkanna Udutalapally
Summary: This article introduces a social IoMT-based activity-monitoring system that faces challenges of collecting a global activity dataset. To address this, the authors propose Skipper, a federated Siamese network-based data-independent group activity segregator that can identify anomalies without prior training. Using activities related to school environments as a proof of concept, Skipper monitors students' motion signatures and calculates indices to identify students who do not perform the same activity. Real-world implementations show that Skipper is a fast, easy, and accurate solution for recognizing outliers in IoMT social systems.
IEEE TRANSACTIONS ON COMPUTATIONAL SOCIAL SYSTEMS
(2023)
Article
Chemistry, Analytical
Smriti Sinha, Akashlina Basu, Jai Shukla, Shirin Dasgupta, Gorachand Dutta, Soumen Das
Summary: A simple, reagent-free, non-destructive, smartphone-integrated paper-based device was developed for measuring blood hematocrit (Hct) level. The device, calibrated using a custom-made Python algorithm, showed wide linear range, high accuracy, and suitability for quantitative estimation and quality assessment in different medical settings.
ANALYTICAL METHODS
(2023)
Article
Computer Science, Information Systems
Aparna Sinha, Deepraj Chowdhury, Sandeep Sharma, Yashasva Raj Sherke, Debanjan Das
Summary: This paper proposes a smart, accurate, and reliable data-driven architecture, nCare, to predict the battery's health at low power and low computation costs. Three models are used for health prediction, including two Gaussian Process Regression (GPR) models for predicting State of Health (SoH) of the battery and one AutoKeras model for predicting Remaining Useful Life (RUL) of the battery. The nCare architecture ensures an effective and accurate solution for predicting the RUL of a battery.
INTERNET OF THINGS
(2023)
Article
Nanoscience & Nanotechnology
Tamal Dey, Sudarshan Singh, Subhajit Jana, Soumen Das, Samit K. Ray
Summary: In this study, two UV-NIR dual-absorbing nanostructures, including S-GQD/PbS and Se-GQD/PbSe, were developed. These nanocomposites were synthesized by a two-step solvothermal method. The fabricated photodetectors can operate over a wide wavelength range and exhibit superior performance under zero-bias conditions.
ACS APPLIED NANO MATERIALS
(2023)
