Article
Chemistry, Analytical
Sinan Gucluer
Summary: This study presents the design and fabrication of a miniaturized Archimedean screw pump for pumping high-viscosity fluids within microfluidic channels. The pump, 3D-printed and operated vertically, demonstrates efficient pumping of polyethylene glycol solutions, making it suitable for point-of-care and field applications. The pump's simple fabrication and easy operation position it as a promising candidate for lab-on-a-chip applications involving high-viscosity fluids.
Article
Radiology, Nuclear Medicine & Medical Imaging
Micol Colella, Daniel Z. Press, Rebecca M. Laher, Courtney E. McIlduff, Seward B. Rutkove, Antonino M. Cassara, Francesca Apollonio, Alvaro Pascual-Leone, Micaela Liberti, Giorgio Bonmassar
Summary: Peripheral magnetic stimulation (PMS) is a complementary method to standard electrical stimulation (ES) that can stimulate sensory and motor nerve fibers without discomfort. In this study, a novel PMS coil was developed using flexible technologies and its effectiveness was validated through simulations and experiments.
Article
Chemistry, Analytical
Joshua J. Davis, Melanie Padalino, Alexander S. Kaplitz, Greggory Murray, Samuel W. Foster, Jonathan Maturano, James P. Grinias
Summary: This study explores the potential use of an open-source peristaltic pump and a low-cost commercial Venturi pump as alternatives to precision syringe pumps for droplet microfluidics. Both devices provided stable flow and high reproducibility in signal intensity, making them suitable for common droplet microfluidic applications.
ANALYTICA CHIMICA ACTA
(2021)
Article
Multidisciplinary Sciences
Meng-Chun Hsu, Mehran Mansouri, Nuzhet N. N. Ahamed, Stephen M. Larson, Indranil M. Joshi, Adeel Ahmed, David A. Borkholder, Vinay V. Abhyankar
Summary: Well-defined fluid flows are essential for microfluidic culture systems, but the current devices are often too large to be integrated into confined environments. This study presents a tunable 3D printed micro pressure regulator (mu PR) combined with a battery-powered miniature air pump, which provides robust flow control capabilities for microfluidic applications.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Electrical & Electronic
Yujue Xie, Yuting Wang, Zhenxiang Yi, Ming Qin, Qing-An Huang
Summary: This study investigates the effects of miniaturized housing structure on MEMS thermal wind sensors for the first time through simulation and experiments, showing that smaller pillar diameter, more pillar number, and lower pillar height improve device performance. Additionally, a curved roof design is proposed for high wind speed measurement.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Chemistry, Analytical
Chaoxiang Yang, Bohao Hu, Liangyu Lu, Zekai Wang, Wenjuan Liu, Chengliang Sun
Summary: This work presents a miniaturized piezoelectric MEMS accelerometer with an area of only 868 x 833 µm² based on a polygonal topology. The proposed design shows higher voltage sensitivity compared to a device with larger fixed sides. The fabricated accelerometers demonstrate good linearity and high resolution for accelerations less than 2 g.
Review
Chemistry, Multidisciplinary
Hartmut Hillmer, Carsten Woidt, Andre Istock, Aliaksei Kobylinskiy, Duc Toan Nguyen, Naureen Ahmed, Robert Brunner, Thomas Kusserow
Summary: Optical spectrometers and sensors are crucial in metrology and information technology, with factors like size, resolution, sensitivity, spectral range, efficiency, reliability, and cost to consider. Nanomaterials and nanotechnologies have the potential to optimize these demands, which can sometimes conflict with each other. The paper focuses on visible and near infrared ranges, comparing different optical sensors and technologies for efficiency and cost-effectiveness.
Article
Chemistry, Analytical
Takashi Ozaki, Norikazu Ohta, Motohiro Fujiyoshi
Summary: This study proposed a laser scanner design and fabrication method, successfully achieving a large quasi-static mechanical deflection angle amplitude in two axes with a large mirror.
Article
Acoustics
P. Honzik, M. Bruneau, S. Durand, N. Joly
Summary: The paper aims to provide a suitable analytical approach for describing the behavior of a miniaturized square MEMS receiving transducer, optimizing sensitivity while maintaining a Cartesian geometry and minimum dimensions. The analytical method introduced in this study avoids difficulties of multi-modal analysis caused by geometrical discontinuity, and presents an approximate analytical solution for estimating sensitivity in the lower frequency range. The FEM solutions provided were used to test against the analytical results.
JOURNAL OF SOUND AND VIBRATION
(2021)
Article
Engineering, Mechanical
Fatih Akkoyun, Adem Ozcelik
Summary: This study presents the design and fabrication of a low-cost and battery-operated microfluidic pump for fluid manipulation in field and remote applications. The portable pump demonstrates high flow rates and the ability to handle high viscosity fluids.
Article
Chemistry, Analytical
Clint John Cortes Otic, Shigeru Yonemura
Summary: This paper proposes a mechanism for trapping and grasping micro-objects without physical contact by utilizing thermally induced Knudsen forces in a rarefied gas. The mechanism is achieved by the pressure differences induced by thermal edge flows, attracting the objects to a heated thin plate.
Article
Engineering, Electrical & Electronic
Qingmei Xu, Chongwei Zou, Chengtao Sun, Xingguo Zhang, Haixia Yu, Dachao Li
Summary: This paper presents a miniaturized and automatic optofluidic system for accurate and high-precision monitoring of glucose concentration in microvolume ISF samples. The system achieved high precision for automatic and continuous monitoring of glucose, showing great promise for continuous monitoring of blood glucose concentration.
IEEE SENSORS JOURNAL
(2022)
Article
Chemistry, Analytical
Dong Geon Jung, Maeum Han, Seung Deok Kim, Soon Yeol Kwon, Jin-Beom Kwon, Junyeop Lee, Seong Ho Kong, Daewoong Jung
Summary: A miniaturized portable total phosphorus analysis device was developed for real-time monitoring and prevention of eutrophication by pretreating analyte and measuring the absorbance of blue-colored analyte. The device has a wide linear response range and its performance is similar to that of a conventional TP analysis system, suitable for automated in situ TP analysis.
Article
Mechanics
Kannan Solai, Meera Chandrasekaran, Joseph Daniel Rathnasami
Summary: The main goal of this study is to achieve a lower resonance frequency in a compact micromachined structure by optimizing various parameters such as the choice of piezoelectric material and the structural configuration of the harvester. The authors propose to maximize induced stress and harvested power by using a sectioned cantilever with gradually decreasing widths in order to achieve a significant improvement in power generation without compromising miniaturization.
ARCHIVE OF APPLIED MECHANICS
(2021)
Article
Multidisciplinary Sciences
Aman Agrawal, Jack F. Douglas, Matthew Tirrell, Alamgir Karim
Summary: Many biopolymers undergo phase separation due to chain connectivity and low entropy of mixing. This phase separation process, called complex coacervation, plays a vital role in biological structures and processes. In this study, we investigate the field responsiveness of stabilized coacervate droplets after phase separation and exposure to deionized water. We find that by applying low-voltage electric fields, we can precisely control the position of individual droplets and induce chain formation. This phase separation-like process resembles the behavior of electrorheological fluids and is attributed to altered interfacial viscoelastic properties and high polarizability of the droplets.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
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)