Article
Engineering, Electrical & Electronic
Ruijun Zhang, Jia Liu, Geng Liu, Liang Yao, Ying Liu, Rongdun Hong, Feng Zhang
Summary: A novel dual P-layer 4H-SiC p-i-n ultraviolet photodetector is proposed and investigated, showing effective reduction of carrier recombination and enhanced separation of electron-hole pairs near the device surface. The photodetector exhibits high response and detectivity, particularly in the extreme ultraviolet to ultraviolet-C wavelength range. It achieves a peak spectral response of 0.2 A/W with a quantum efficiency of 95.3% and a low avalanche breakdown voltage of 182 V. The dual P-layer structure offers an innovative approach for the advancement of future ultraviolet photodetectors across different illumination wavelengths.
ELECTRONICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Zhao Fu, Mingkun Zhang, Shan Han, Jiafa Cai, Rongdun Hong, Xiaping Chen, Dingqu Lin, Shaoxiong Wu, Yuning Zhang, Deyi Fu, Zhengyun Wu, Baoping Zhang, Feng Zhang, Rong Zhang
Summary: In this study, 4H-SiC p-i-n photodiodes with various micro-hole arrays were fabricated using selective etching technology, resulting in improved device performance. By increasing the photosensitive area and introducing a high electric field, the responsivity and quantum efficiency of the devices were significantly enhanced.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Qunsi Yang, Qing Liu, Lijian Guo, Shucai Hao, Dong Zhou, Weizong Xu, Baoqiang Zhang, Fan Yang, Fangfang Ren, Dunjun Chen, Rong Zhang, Youdou Zheng, Hai Lu
Summary: The results of electrical characteristics and alpha-particle energy spectrometry of 4H-SiC p-i-n diodes are presented. The effective doping concentration of the epitaxial layer used in this study is calculated, approaching the lowest doping level. The detector exhibits low leakage current, superior thermal stability, high energy resolution, and charge collection efficiency.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Optics
Cheng-Hsun Tsai, Kuan-Chih Lin, Chin-Yuan Cheng, Kuo-Chih Lee, H. H. Cheng, Guo-En Chang
Summary: This study demonstrates the first mid-infrared lateral p-i-n GeSn waveguide photodetectors on silicon, utilizing GeSn alloys as the active material to achieve efficient photodetection. By designing and fabricating a lateral p-i-n homojunction diode, optical responsivity was significantly enhanced, leading to a photodetection range of up to 1950 nm with a good responsivity of 0.292 A/W at 1800 nm.
Article
Instruments & Instrumentation
M. Menichelli, M. Bizzarri, M. Boscardin, L. Calcagnile, M. Caprai, A. P. Caricato, G. A. P. Cirrone, M. Crivellari, I. Cupparo, G. Cuttone, S. Dunand, L. Fano, B. Gianfelici, O. Hammad, M. Ionica, K. Kanxheri, M. Large, G. Maruccio, A. G. Monteduro, F. Moscatelli, A. Morozzi, A. Papi, D. Passeri, M. Pedio, M. Petasecca, G. Petringa, F. Peverini, G. Quarta, S. Rizzato, A. Rossi, G. Rossi, A. Scorzoni, L. Servoli, C. Talamonti, G. Verzellesi, N. Wyrsch
Summary: Hydrogenated amorphous silicon is commonly used in radiation-resistant detectors for particle beam flux measurements and space solar panels. This study focuses on p-i-n and charge selective contacts planar diode detectors with a thickness of 10 μm, which were irradiated with neutrons at two fluence values. The radiation resistance of the detectors was evaluated by measuring leakage current and response to x-ray photons. The results show that the leakage current increased by a factor of 2 after irradiation at 1016 neq/cm2, but was completely recovered after annealing for p-i-n devices. X-ray dosimetric sensitivity degraded after irradiation, but partially recovered for charge selective contact devices and increased for p-i-n devices after annealing. For the irradiation test at 5 x 1016 neq/cm2, noticeable degradation in leakage current and x-ray sensitivity was observed after storage, with a small recovery after annealing.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2023)
Article
Engineering, Electrical & Electronic
Qianyu Hou, Qing Cai, Qunsi Yang, Pengfei Shao, Danfeng Pan, Dunjun Chen, Hai Lu, Rong Zhang, Youdou Zheng
Summary: In this study, a low-voltage p-i-n GaN-based alpha-particle detector with excellent energy resolution was fabricated. Superior performances were achieved by artificially enlarging the path of alpha particles in the depletion region and utilizing high crystal quality epitaxial film grown on a single-crystal GaN substrate. The results are expected to advance the research of radiation-hardened GaN-based detectors.
IEEE ELECTRON DEVICE LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Haifan You, Haiping Wang, Weike Luo, Yiwang Wang, Xinghua Liu, Zhenguang Shao, Dunjun Chen, Hai Lu, Rong Zhang, Youdou Zheng
Summary: In this research, Al0.1Ga0.9N p-i-n ultraviolet avalanche photodiodes (APDs) based on sapphire substrates were reported, achieving a record-high gain over 2 x 10(6). The devices fabricated with various mesa diameters demonstrated consistent avalanche behaviors and identical dark current distributions, comparable to GaN APDs grown on free-standing GaN substrates. Quadratic fitting analysis revealed that the leakage current at the breakdown voltage is a mixture of surface and bulk leakage, with the surface component comparable to the bulk. Additionally, KOH surface treatment and SiO2 passivation were proven effective in suppressing the leakage current and achieving robust avalanche performance.
IEEE ELECTRON DEVICE LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Ruchi Singh, Ritesh Bhardwaj, Gaurav Siddharth, Pawan Kumar, Shaibal Mukherjee
Summary: The study demonstrates that in ZnO-based homojunction p-i-n UV photodetectors, increasing the thickness of the top p-type layer leads to a decrease in peak responsivity, while increasing the thickness of the i-ZnO layer results in an increase in responsivity. Additionally, replacing the p-type layer material can significantly improve responsivity and dark current performance.
IEEE SENSORS JOURNAL
(2021)
Article
Physics, Applied
Hadeel Alamoudi, Bin Xin, Somak Mitra, Mohamed N. Hedhili, Singaravelu Venkatesh, Dhaifallah Almalawi, Norah Alwadai, Zohoor Alharbi, Ahmad Subahi, Iman S. Roqan
Summary: In this study, p-n junction devices based on wide-bandgap p-type MnO quantum dots and n-type Si-doped GaN were fabricated. The fabricated solar-blind deep UV photodetector demonstrated high photocurrent response, low dark current, and superior photo-responsivity, making it suitable for low light level applications.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Fahrettin Sarcan, Umit Dogan, Ahmad Althumali, Hari B. Vasili, Leonardo Lari, Adam Kerrigan, Furkan Kuruoglu, Vlado K. Lazarov, Ayse Erol
Summary: This study reports the electrical and optical properties of a novel NiO-based homojunction p-i-n photodiode. The photodiode exhibits diode characteristics and a constant photoresponse under reverse bias. The responsivity of the photodiode is determined to be 295 mA/W at 3.9 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Engineering, Electrical & Electronic
Xinlei Geng, Xiaochuan Xia, Xingzhu Cui, Huishi Huang, Xiaohua Liang, Dawei Yan, Kuikui Tian, Leilei Chen, Xiaohong Yan, Ze Long, Mengchen Niu, Xiangcheng Meng, Hongwei Liang
Summary: A GaN alpha-particle detector with p-i-n structure was fabricated on a sapphire substrate, showing superior performance compared to detectors based on undoped i-GaN layer. The detector exhibited good crystal quality and achieved high charge collection efficiency (CCE) and energy resolution, indicating a promising prospect for cost-effective alpha-particle detectors using GaN-on-sapphire technology.
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
(2021)
Article
Optics
L. A. Hanks, K. Mamic, K. Klos, A. Bainbridge, J. Fletcher, L. Gilder, L. Tedstone, F. J. Castano, A. R. J. Marshall
Summary: An InGaAsSb p-B-n structure is designed and characterized for zero bias low power detection applications. The quasi-planar photodiodes with a 2.25 μm cut-off wavelength achieved a maximum responsivity of 1.05 A/W at 2.0 μm. The D* value was determined to be 9.4 x 1010 Jones, remaining >1 x 1010 Jones up to 380 K. The photodiode demonstrated potential for simple miniaturized detection and measurement of low concentration biomarkers, detecting optical powers as low as 40 pW without temperature stabilization or phase-sensitive detection.
Article
Physics, Applied
Yongle Zhang, Hanyi Xue, Meng Zhu, Zhaona Wang
Summary: A self-powered photodetector with distinguishable wavelength detection has been developed by using two tandem p-n junctions, which effectively reduce wavelength interference and separate photo-generated carriers. The photodetector achieves bidirectional transient photocurrents for ultraviolet and visible detection, and significantly improves peak-to-peak current through the pyro-phototronic effect.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Sheikh Z. Ahmed, Samiran Ganguly, Yuan Yuan, Jiyuan Zheng, Yaohua Tan, Joe C. Campbell, Avik W. Ghosh
Summary: III-V material based APDs have been found to have low noise levels similar to Silicon APDs, and can operate at any wavelength in the infrared spectrum. A physics-based SPICE compatible compact model has been developed to accurately capture the physical characteristics of these APDs in integrated photonics circuit simulations, using parameters extracted from an EDTB model calibrated to DFT and MC methods.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Physics, Applied
Haijuan Wu, Lingyan Liang, Xiaolong Wang, Hengbo Zhang, Jinbiao Bao, Hongtao Cao
Summary: The addition of Sn influences the electronic structure and phase state of the films, leading to an increase in optical bandgap and a decrease in refractive index as Sn content increases. The Sn-free CuI films processed in air exhibit p-type conduction, with an increasing resistivity and a significant drop in hole concentration during the Sn-induced amorphization process. Transparent Cu-Sn-I/IGZO p-n junctions show the best rectifying characteristic at C-Sn=15%, with a forward-to-reverse ratio of 6.2x10(3).
APPLIED PHYSICS LETTERS
(2021)
Article
Engineering, Chemical
B. T. H. Borgelink, A. E. Carchia, J. F. Hernandez-Sanchez, D. Caputo, J. G. E. Gardeniers, A. Susarrey-Arce
Summary: The new computational model for predicting the filtering efficiency of N95 facemasks presents a more realistic view of practical facemasks with different particle capturing mechanisms. The simulation results show that capturing efficiencies vary with droplet diameter and air inflow velocity, and the model compares well with experimental results. The numerical approach is expected to contribute to the optimization of anti-viral facemasks.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Review
Chemistry, Physical
Luigi Coppola, Silvia Beretta, Maria Chiara Bignozzi, Fabio Bolzoni, Andrea Brenna, Marina Cabrini, Sebastiano Candamano, Domenico Caputo, Maddalena Carsana, Raffaele Cioffi, Denny Coffetti, Francesco Colangelo, Fortunato Crea, Sabino De Gisi, Maria Vittoria Diamanti, Claudio Ferone, Patrizia Frontera, Matteo Maria Gastaldi, Claudia Labianca, Federica Lollini, Sergio Lorenzi, Stefania Manzi, Milena Marroccoli, Michele Notarnicola, Marco Ormellese, Tommaso Pastore, MariaPia Pedeferri, Andrea Petrella, Elena Redaelli, Giuseppina Roviello, Antonio Telesca, Francesco Todaro
Summary: This paper discusses the strategies for producing sustainable and durable reinforced concrete structures in different environments, focusing on design methodologies, unconventional corrosion-resistant reinforcements, alternative binders, and various solutions for concrete protection and prevention against corrosion. Scientific literature analysis reveals that the sustainability of building materials can only be achieved through the implementation of multiple strategies aimed at reducing environmental impact, improving durability, and enhancing performance.
Article
Optics
Alessio Buzzin, Rita Asquini, Domenico Caputo, Giampiero de Cesare
Summary: This study presents a compact, inexpensive, and user-friendly glass chip that integrates the interaction and detection elements for optical biosensing systems. The chip utilizes the interaction between complex refractive index of a liquid mixture and evanescent wavelight, and has been successfully applied in food quality and fat content detection.
PHOTONICS RESEARCH
(2022)
Article
Nuclear Science & Technology
N. Burgio, L. Cretara, M. Corcione, M. Frullini, L. Iannascoli, A. Nascetti, A. Santagata, G. Palmerini, A. Quintino, J. R. Brucato, A. Meneghin, D. Paglialunga
Summary: This paper investigates the radiation effects on the ABCS payload in the inner Van Allen belt and proposes shielding solutions. It also performs simulations of neutron irradiation on the ABCS structure. The results show that a shielding solution consisting of tungsten, resins, and aluminium can effectively reduce the radiation dose.
RADIATION DETECTION TECHNOLOGY AND METHODS
(2022)
Article
Chemistry, Analytical
Nicola Lovecchio, Francesca Costantini, Augusto Nascetti, Giampiero de Cesare, Domenico Caputo
Summary: The proposed LoC platform based on hydrogenated amorphous silicon sensors is suitable for biochemical and food quality control analysis. It includes light and temperature sensors, a thin film resistor, and an optional thin film interferential filter, showing promising performance.
Article
Biophysics
Donato Calabria, Ilaria Trozzi, Elisa Lazzarini, Andrea Pace, Martina Zangheri, Lorenzo Iannascoli, Nithin Maipan Davis, Sagar Sarvad Gosikere Matadha, Thiago Baratto De Albuquerque, Simone Pirrotta, Marta Del Bianco, Gabriele Impresario, Liyana Popova, Nicola Lovecchio, Giampiero de Cesare, Domenico Caputo, John Brucato, Augusto Nascetti, Massimo Guardigli, Mara Mirasoli
Summary: Space exploration is entering a new era with planned missions to the Moon and Mars, making the development and validation of new technologies crucial. Biosensors and lab-on-chip devices can play a key role in analyzing biological samples, monitoring environmental safety, and searching for signs of life in extra-terrestrial environments. Small satellites like CubeSats are being utilized as cost-effective platforms for technology validation. A fully autonomous lab-on-chip platform has been developed for performing bioassays in space, simplifying device design and protocols and enhancing stability of reagents.
BIOSENSORS & BIOELECTRONICS
(2023)
Article
Chemistry, Analytical
Cinzia Caliendo, Massimiliano Benetti, Domenico Cannata, Alessio Buzzin, Francesca Grossi, Enrico Verona, Giampiero de Cesare
Summary: ZnO thin films were grown on fused silica substrates using the radio frequency sputtering technique. The films exhibited a hexagonal wurtzite structure and dense columnar morphology. The ZnO layers were used for surface acoustic wave (SAW) delay lines and showed sensitivity to UV light. The ZnO/fused silica-based SAW UV sensors demonstrated potential for UV sensing in harsh environments due to their optical transparency and wireless reading capability.
Article
Chemistry, Physical
Luigi Angelo Castriotta, Emanuele Calabro, Francesco Di Giacomo, Sathy Harshavardhan Reddy, Daimiota Takhellambam, Barbara Paci, Amanda Generosi, Luca Serenelli, Francesca Menchini, Luca Martini, Mario Tucci, Aldo Di Carlo
Summary: Perovskite solar technology has gained attention in the last decade with efficiencies reaching up to 25.7%. However, the focus has been on performance rather than stability under stress conditions. In this study, researchers explored a universal strategy to enhance stability by using a combination of additives in the perovskite ink. The results showed significant improvements in efficiency and stability, with the modified solar cells retaining 95% efficiency after 1000 hours of light soaking and 100% efficiency after 1500 hours of stress.
Article
Chemistry, Analytical
Francesca Costantini, Nicola Lovecchio, Manasa Nandimandalam, Ariana Manglli, Francesco Faggioli, Mara Biasin, Cesare Manetti, Pio Federico Roversi, Augusto Nascetti, Giampiero de Cesare, Domenico Caputo
Summary: In this study, a Lab-on-Chip (LoC)-PCR device called System-on-Glass (SoG) was developed, which integrated thermalization, temperature control, and detection elements on a single glass substrate. Real-time reverse transcriptase PCR of RNA from plant and human viruses was successfully conducted using this device. The LoC-PCR achieved the same detection limit and analysis time as the standard equipment, but with the advantage of portability and faster analysis.
Article
Chemistry, Analytical
Alessio Buzzin, Rita Asquini, Domenico Caputo, Giampiero de Cesare
Summary: This paper presents a compact and sensitive refractive index sensor that can evaluate the concentration of an analyte in a sample. The sensor achieves high sensitivity and low production costs by embedding the sample-light interaction site and the detector in a small glass substrate. Experimental results demonstrate that the sensor performs well in detecting sugar content.
Article
Energy & Fuels
Luca Serenelli, Luca Martini, Francesca Menchini, Massimo Izzi, Mario Tucci
Summary: To achieve high efficiency solar cells, the crystalline silicon (c-Si) heterojunction (HJ) is one of the best options due to its high open circuit voltage (Voc) achievable through excellent surface passivation using intrinsic amorphous silicon (a-Si:H) layers. However, wafer edges may result non-passivated in some cases, leading to Voc reduction. In this study, the correlation between Voc, cell area, and recombining surface introduced by cutting the cell into a smaller one was analyzed. The possibility of re-passivation of cell edges by depositing a thick a-Si:H layer after masking the sun-exposed cell surface was also investigated in order to avoid re-annealing.
Article
Chemistry, Physical
Silvia Casalinuovo, Daniela Caschera, Simone Quaranta, Virgilio Genova, Alessio Buzzin, Fulvio Federici, Giampiero de Cesare, Donatella Puglisi, Domenico Caputo
Summary: This study explores the use of gold nanoparticles on flexible cotton fabric as sensitive substrates for acetone and ethanol, utilizing impedance measurements. The nanoparticles were synthesized using green methods and then deposited on cotton fabric. The study found that the functionalization of the nanoparticles affects the electrical interconnection and electron transport, leading to different sensing properties for acetone and ethanol. The findings have potential implications for the development of VOC sensors in personal protective equipment and wearable telemedicine devices, as well as low-cost detectors for disease diagnosis based on breath volatiles.
Article
Engineering, Aerospace
Stefano Carletta, Augusto Nascetti, Sagar S. Gosikere S. Matadha, Lorenzo Iannascoli, Thiago Baratto de Albuquerque, Nithin Maipan Davis, Luigi Schirone, Gabriele Impresario, Simone Pirrotta, John R. Brucato
Summary: AstroBio CubeSat is a mission funded by the Italian Space Agency to validate novel lab-on-chip technology, which allows micro- and nanosatellites to be used as autonomous orbiting laboratories for astrobiology research. This paper presents the experimental characterization of the passive magnetic attitude control system (PMACS) on the engineering unit of the satellite, which is achieved using a Helmholtz cage facility and a spherical air-bearing to simulate environmental conditions. The results confirm the effectiveness of the proposed methods and PMACS design.
Article
Engineering, Electrical & Electronic
Kehao Feng, Zhenghua Zhang, Guohua Bai, Xiuyuan Fan, Rongzhi Zhao, Xuefeng Zhang
Summary: This paper proposes a new method to accurately evaluate the high-frequency power loss of soft magnetic materials. Through a two-step calibration, the system is able to compensate for the phase angle discrepancy between the exciting current and induced voltage, enabling a higher power loss measurement frequency.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Mingfang Kang, Tong Liu, Hongmei Sun, Lin Li, Keliang Wang
Summary: In this study, the absorption performance of ambient nitrogenous toxic gases on a monolayer of blue phosphorus phase germanium selenide (GeSe) was investigated using density-functional theory calculations. The results showed that GeSe monolayer exhibits higher sensitivity and selectivity for the hazardous gas NO.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Yaqiong Niu, Zhicheng Zou, Longsheng Cheng, Chaofeng Ye
Summary: This paper proposes a novel method to stabilize the laser diode output using a close-loop control with two feedbacks. The proposed method performs better for long-time operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jiajie Li, Ying Liu, Zhen Chai, Qian Cao, Renjie Li, Yueyang Zhai
Summary: This study proposed an efficient and high-quality beam-splitting method based on a diffractive optical element, enabling multichannel SERF atomic magnetometers to achieve ultra-high consistency and sensitivity. It has significant applications in array biomagnetic measurement systems.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
E. Oliveira, C. Doering, H. Fouckhardt
Summary: With the development of Lab on a chip technology, fluid management using dispersed droplets has become an important approach. Electrowetting on dielectric (EWOD) is one method for droplet actuation, but it requires prior definition of droplet positions. Optoelectrowetting (OEW) goes further by allowing changes in electrical parameters through impinging light spots, without the need for predefined droplet positions. This study re-evaluates the key parameters of OEW and explores their effects on droplet actuation using numerical optimization methods.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Haipeng Wang, Zhiguo Wang, Gancheng Zhu, Shuai Zhang
Summary: A novel capacitive proximity skin was developed to improve the performance of robotics in handling liquid-filled containers. This skin features a flexible structure that can adapt to different grippers and seamlessly integrate with Robot Operating System. Experimental results demonstrated that this proximity skin achieved data-lossless detection and contactless measurement of liquid level, making it suitable for grasping operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Tsenguun Byambadorj, Xiangyu Zhao, Yutao Qin, Yogesh B. Gianchandani
Summary: In this research, a monolithically microfabricated Knudsen pump (KP) without suspended membranes was presented. These pumps offer improved mechanical robustness, wider process window, and simplified microfabrication process compared to previous designs. The experimental results matched the modeling results well, indicating the potential for monolithic integration onto complex lab-on-a-chip systems.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Hamed Karami, Saeed Karami Chemeh, Vahid Azizi, Hooman Sharifnasab, Jose Ramos, Mohammed Kamruzzaman
Summary: Aroma is a significant quality trait for pharmaceutical plants and their products, indicating the quality of the raw material. An electronic nose is an efficient approach for identifying and evaluating the aroma of essential oils. In this study, tarragon was dried at different temperatures and air velocities, and the purity of tarragon essential oil was evaluated using an electronic nose. Multivariate data analysis and artificial neural networks modeling were employed to quantify and classify the obtained essential oils.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Xiaoyang Duan, Dan Xu, Wenjun Jia, Ran Li, Bohao Sun, Ruitian Yan, Wenjie Zhao
Summary: Flower-like WO3/WS2 heterojunction materials constructed via a low-temperature in-situ oxidation method exhibit significant improvements in the detection of NO2 gas in gas sensors, along with good selectivity and reproducibility.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Peng Yu, Mengyang Zhang, Manqi You, Yuxi Gao, Landong Xiao, Yan Peng, Jingxia Lai, Zhouzhao Shi, Siwei Luo, Gencai Guo, Gang Guo
Summary: Recent studies have shown that two-dimensional Janus transition metal dichalcogenides (TMDs) have great potential for applications in gas sensors. By conducting first principles calculations, this study explores the potential application of Pd-doped monolayer HfSeS as gas sensor materials for detecting CO, CO2, NH3, and NO. The results demonstrate the good thermodynamical stability and reversible adsorption of these molecules on both pristine and Pd-doped HfSeS, with Pd-doped HfSeS showing higher sensitivity towards NO due to its metallic behavior upon NO adsorption.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jinlan Yang, Linjiao Li, Jun Huang, Quan Zhang, Hiba Affane
Summary: This study proposes a method for large-scale aggregation of micro-particles by creating a vortex region using low-frequency oscillation. Experimental results show that this method can achieve a large aggregation area and has the advantages of low cost and low power consumption.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Jitendra Singh, Saurabh Kumar Gupta, Vinita
Summary: In this investigation, a Surface Acoustic Wave (SAW) formalin gas sensor was explored for low-level formalin gas sensing applications. The sensor showed stable response and high sensitivity to formalin gas concentration, making it a reliable and useful sensor for room temperature operations.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Junyao Wang, Yahao Liu, Huan Liu, Qi Hou, Jianxin Xu, Hongxu Pan, Jingran Quan, Yansong Chen, Hanbo Yang, Lixiang Li
Summary: A flexible electrode with a serpentine-shaped tetra-chiral structure was designed to improve the mechanical properties and prevent mechanical fracture of flexible electrodes. The research demonstrated that this structure reduced the maximum tensile stress by 87.19% compared to the existing tetra-chiral structure. The flexible electrode remained conductive even at a strain of 70% and showed resistance values of 5 ohm and 4.4 ohm at a bending angle of 180 degrees and after 1000 fold cycles. Furthermore, the flexible electrodes showed great potential in biological signal monitoring, particularly in collecting ECG and pulse signals.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
Taihao Chen, Yong Fang, Mengru Zhu, Zhiwei Zhao, Wei Lei, Zhuoya Zhu, Helong Jiang
Summary: Flexible dual-spectral carbon nanodots/flexible n-silicon heterojunction photodetectors with high responsivity and detectivity are reported. These detectors show photo response in UV illumination and only in forward bias under visible illumination. The photocurrent of the device remains high even under bending strain.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
Article
Engineering, Electrical & Electronic
M. S. Sikandar Bathusha, Israr Ud Din, Rehan Umer, Kamran A. Khan
Summary: Graphene-based nanomaterials are used as embedded sensors to monitor fracture behavior in composite structures. This study investigates the in-situ crack propagation and fracture behavior in a glass fiber reinforced polymer composite using embedded reduced graphene oxide coated fabrics and highly conductive graphene nanoplatelet paper.
SENSORS AND ACTUATORS A-PHYSICAL
(2024)
