Article
Chemistry, Analytical
Diwakar M. Awate, Cicero C. Pola, Erica Shumaker, Carmen L. Gomes, Jaime J. Juarez
Summary: Despite the limitations of flow cytometers, a 3D-printed imaging platform (3DPIP) has been developed to accurately count particles and conduct fluorescence microscopy efficiently. The 3DPIP utilizes a custom particle counter code and machine vision-based algorithm to identify and count particles, showing comparable accuracy to commercial particle counters. Additionally, the platform can perform static experiments and flow-through experiments effectively, making it a promising tool for use in resource-limited clinical environments.
Article
Engineering, Electrical & Electronic
Lorenzo A. Buscaglia, Joao Paulo Carmo, Osvaldo N. Oliveira
Summary: This article introduces a portable and low-cost impedance analyzer called Simple-Z, which utilizes the AD5933 integrated circuit and peripheral circuits for precise signal generation and reading. The software implemented in Simple-Z allows for strategic register overflow, control of acquisition cycles, and iterative approximation for optimal response amplification and calibration. Results obtained with Simple-Z were comparable to those from commercial benchtop analyzers. The affordability and scalability of Simple-Z make it suitable for point-of-care diagnosis systems and teaching laboratories.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Analytical
Chengzhuang Yu, Shanshan Li, Chunyang Wei, Shijie Dai, Xinyi Liang, Junwei Li
Summary: This article introduces the design of a portable and low-cost fluorescence microscope and evaluates its performance. The microscope is capable of bright-field and fluorescence imaging with micron-level resolution. By using 3D print components and a webcam, the microscope is assembled at a low cost.
Article
Engineering, Electrical & Electronic
Khaled Humood, Heba Abunahla, Baker Mohammad
Summary: Recently, Memristor (MR) devices have gained significant attention in various applications, with electrical characterization and testing being one of the main challenges. A novel power-efficient, cost-effective, lightweight, and automated Arduino-based MR characterization platform named MemChar has been proposed, with excellent correlation to industry-standard device parameter analyzer tools. This user-friendly platform represents a significant milestone in utilizing MR devices for mobile, IoT, and sensing applications.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Engineering, Electrical & Electronic
Subhanwit Roy, Yee Jher Chan, Nigel F. Reuel, Nathan M. Neihart
Summary: This article presents a simple, low-cost, and portable readout design based on coherent demodulation technique for spiral coil-based LC resonant sensors. The theoretical analysis establishes the relationship between the interrogation distance and other circuit parameters. The implemented readout system, using printed circuit board technology and off-the-shelf components, operates between I and 100 MHz and consumes 1.26 W. Experimental measurements demonstrate reliable and repeatable operation with interrogation distances up to 5 cm.
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT
(2022)
Article
Chemistry, Analytical
Andrew Teggert, Harish Datta, Stephen McIntosh, Barry Warden, Simon Bateson, Fathi Abugchem, Zulfiqur Ali
Summary: Absorption is a widely used technique with lower sensitivity compared to techniques like fluorescence. Optical cavity approaches can enhance sensitivity by increasing pathlength, but have not yet been widely used for analytical applications and point-of-care diagnostics.
Article
Computer Science, Artificial Intelligence
Weiran Li, Qian Zhu, Hanyu Zhang, Ziyu Xu, Zhenbo Li
Summary: This study proposes a fry counting method called MSENet, which improves counting accuracy and solves the issue of fry aggregation by designing a lightweight network and utilizing the Squeeze-and-Excitation block to enhance features.
APPLIED SOFT COMPUTING
(2023)
Article
Chemistry, Analytical
Leila Khoshmaram, Maryam Mohammadi, Adel Nazemi Babadi
Summary: This article presented a self-constructed fluorimeter using LED arrays as emission sources and a smartphone camera for fluorescence detection. The results obtained by the designed fluorimeter were consistent with those obtained by a commercial spectrofluorimeter, confirming its applicability for analytical purposes.
MICROCHEMICAL JOURNAL
(2021)
Article
Engineering, Electrical & Electronic
Yui Otagaki, Yuji Miyato, Jamie Barras, Hideo Sato-Akaba, Panagiotis Kosmas
Summary: Nuclear quadrupole resonance (NQR) technology is utilized in a small, portable device designed to detect landmines, offering a cost-effective and efficient solution. The device includes a field-programmable gate array (FPGA) and a low-impedance transmission and reception circuits for mine detection, with successful testing in the laboratory using 100g of RDX explosive. Detection was achieved with a signal to noise ratio (SNR) similar to existing mine detectors, but at a lower cost and smaller form factor, demonstrating its potential for practical application.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Analytical
Sarah Di Nonno, Roland Ulber
Summary: A novel portable low-cost Arduino-controlled photo- and fluorimeter has been developed for on-site measurements. The device demonstrates similar results to a laboratory spectrometer and fluorimeter in validation experiments, making it a viable option for field testing.
Article
Computer Science, Information Systems
Chih-Ying Chen, Nan-Ching Yeh, Yao-Chung Chuang, Chuan-Yao Lin
Summary: In this study, a low-cost, low-power high-performance weather prediction system was developed using the Raspberry Pi platform, which can be used in atmospheric science education and local weather forecasting applications.
Article
Engineering, Mechanical
Amir Molaei, Nima Amooye Foomany, Mahsa Paraspour, Javad Dargahi
Summary: This article proposes a two-degrees-of-freedom robot called MOCH for wrist rehabilitation. The MOCH mechanism includes a remote center of motion (RCM) mechanism with a rotation center outside of the robot structure. By coinciding the RCM of the robot with the rotation axis of the wrist, the patient can achieve pure rotational motion of the hand. MOCH's design takes into account the mechanical criteria and requirements of the wrist rehabilitation robot, and it uses a novel actuation to reduce inertia and size.
MECHANISM AND MACHINE THEORY
(2022)
Editorial Material
Hematology
Shruti Chaturvedi
Summary: A study in this issue of Blood suggests that adding caplacizumab to standard therapy for immune thrombotic thrombocytopenic purpura may not be cost-effective based on outcomes such as hospitalization duration and disease recurrence.
Article
Engineering, Electrical & Electronic
Ruchira Nandeshwar, Poulami Mandal, Siddharth Tallur
Summary: In this work, we introduce a point-of-use sensor for quantifying urea concentration in milk samples, which requires minimal sample preprocessing and provides seamless readout. The proposed method involves the addition of p-dimethylaminobenzaldehyde (p-DMAB) to the supernatant obtained from milk solids, resulting in a yellow-green color chromogen. The intensity of the color is directly proportional to the amount of chromogen produced, and a low-cost optical phase sensitive detection (PSD) system is used for detection. The acquired data is wirelessly streamed to a smartphone for further analysis. Preliminary results demonstrate a limit of detection (LOD) of 0.19 mg/mL for urea concentrations ranging from 0.1 mg/mL (safe level) to 0.7 mg/mL (maximum permissible limit).
IEEE SENSORS JOURNAL
(2023)
Article
Electrochemistry
Shan Chen, Jinghu Chen, Mingyan Qian, Jun Liu, Yimin Fang
Summary: The excessive use of nitrate fertilizer in agriculture has caused significant economic loss and environmental pollution. Hence, the development of a rapid sensing platform for on-site nitrate detection is crucial for environmental and agricultural purposes. This study presents a platform composed of an easily conducted extraction filter (ECEF) and a sensing element based on modified cadmium sulfide nanorods (CdS NRs) screen printed electrode (CdS NRs-SPE), enabling easy extraction of nitrate from soil in 3 minutes and direct detection of nitrate within 10 minutes with a detection limit of 2.3 μM and a linear range from 0.05 to 5 mM. The portable and low-cost CdS NRs-SPEs can be reused for over a month without significant loss of performance, showing promising application for intelligent nitrogen management and precise fertilization in modern agriculture.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Analytical
Chunyang Wei, Chengzhuang Yu, Shanshan Li, Jiyu Meng, Tiejun Li, Jingmeng Cheng, Feng Pan, Junwei Li
Summary: In this study, a microfluidic chip based on co-flow step emulsification was proposed for droplet digital PCR (ddPCR), which combines droplet generation, PCR amplification, and fluorescence detection on a single device. The chip offers low cost, easy operation, excellent quantitative capability, and small size, making it a promising tool for DNA molecule quantification.
ANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Applied
Shanshan Li, Jiaqi Zhang, Yanrong Li, Yang Xu
Summary: In this study, porphyrin-based NCPs with dual fluorescence emission were synthesized via a solvothermal process. These materials could be used for ratiometric fluorescent sensing of pH and copper ion. NCPs@PEI-1 showed a good fluorescence response to pH and could also be used as a sensor for detecting Cu2+.
Article
Chemistry, Analytical
Chengzhuang Yu, Shanshan Li, Chunyang Wei, Shijie Dai, Xinyi Liang, Junwei Li
Summary: This article introduces the design of a portable and low-cost fluorescence microscope and evaluates its performance. The microscope is capable of bright-field and fluorescence imaging with micron-level resolution. By using 3D print components and a webcam, the microscope is assembled at a low cost.
Article
Chemistry, Analytical
Chunyang Wei, Chengzhuang Yu, Shanshan Li, Tiejun Li, Jiyu Meng, Junwei Li
Summary: The presented microfluidic chip provides a possible solution for achieving 3D cell culture and enabling scalable and high-throughput cell culture, with great potential for application in biological fields.
Article
Chemistry, Analytical
Chengzhuang Yu, Shijie Dai, Shanshan Li, Junwei Li, Hezhi Hu, Jiyu Meng, Chunyang Wei, Jie Jayne Wu
Summary: A rapid nucleic acid detection method was developed in this study, using PCR and ICP technology combined with Nafion film for enrichment. The capability of the method was demonstrated through an animal-derived component detection experiment for meat product identification applications, with a detection time of about 35 min.
Article
Biochemical Research Methods
Chengzhuang Yu, Shijie Dai, Ziqi Zhang, Shanshan Li, Jingmeng Cheng, Hezhi Hu, Jayne Wu, Junwei Li
Summary: Meat adulteration detection is achieved using a multiplex digital polymerase chain reaction method and a low-cost device. A polydimethylsiloxane microfluidic device is used to automatically load polymerase chain reaction reagents into microchambers. The method can distinguish DNA templates from different animal species and has a limit of detection of 3 copies/μL. The method has potential for point-of-care testing with portable microscopy equipment.
Article
Chemistry, Analytical
Bowen Yang, Chao Wang, Xinyi Liang, Jinchao Li, Shanshan Li, Jie Jayne Wu, Tanbin Su, Junwei Li
Summary: Cell viability is essential for drug screening. This study proposed a low-cost microfluidic impedance cytometry device with 100-micron wide indium tin oxide (ITO) electrodes to assess cell viability without the cytotoxicity of dye staining.
Article
Chemistry, Multidisciplinary
Xinyue Shao, Chang Qu, Guoqiang Song, Binghao Wang, Qingyun Tao, Ran Jia, Junwei Li, Jinping Wang, Hailong An
Summary: A photothermal-driven intracellular magnesium ion regulation strategy is proposed to reverse multidrug resistance caused by overexpressed P-gp in cell membrane. The bimetallic Pd@Pt nanostructure (DPd@PtM) delivers Mg2+ into tumor cells and activates the TRPV1 channel for extracellular released Mg2+ influx. The accumulated intracellular Mg2+ suppresses ATP production and downregulates P-gp expression, inhibiting tumor multidrug resistance.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Shanshan Li, Chao Wang, Bowen Yang, Xinyi Liang, Junwei Li
Summary: Impedance flow cytometry, as a label-free single cell analysis approach, provides valuable differential signals. However, particle coincidence is inevitable for high throughput detection, especially with high cell concentration or pumping rate. In this study, a numerical model and a novel method for particle coincidence were proposed to investigate multiparticle events. By statistically analyzing signal peaks, the threshold for particle events and the particle numbers were determined. Compared to customized thresholds, a data-driven cutoff line fundamentally improves the accuracy of particle recognition. Moreover, the key operational parameters and the best practices to avoid multiparticle coincidence events in real applications are elucidated.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Analytical
Jinchao Li, Jingmeng Cheng, Shanshan Li, Jie Jayne Wu, Junwei Li
Summary: In this research, we developed a chamber-based digital PCR (cdPCR) microfluidic device compatible with fluorescence imaging systems for detecting milk adulteration. The device enables digitalization of PCR reagents in microchambers, followed by DNA amplification through thermocycling. Fluorescence images of the microchambers are then analyzed to accurately quantify the target DNA and differentiate intentional adulteration from accidental contamination. The device was validated by authenticating camel milk samples, demonstrating its effectiveness in real biotechnical applications.
Article
Computer Science, Information Systems
Wei Zhou, Wanyun Su, Xingyu Li, Zhaozong Meng, Shanshan Li
Summary: This paper proposes a feature extraction and classification method based on x-ray images to improve the defect recognition rate of thermal batteries. By combining the Gray Level Co-occurrence Matrix and Local Binary Pattern, the gray texture of the monomer is extracted and analyzed for serial feature fusion. The experimental results show that this method achieves a defect recognition rate of 98.9%.
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)
