Article
Chemistry, Analytical
Cheng-Chih Hsu, Wen-Kai Ho, Chyan-Chyi Wu, Ching-Liang Dai
Summary: In this study, enzymatic doped/undoped poly-silicon nanowire sensors with different lengths were fabricated using a top-down technique to measure glucose concentration. The sensitivity and resolution of these sensors correlate well with the dopant property and length of nanowire. Experimental results indicate that the resolution is proportional to the nanowire length and dopant concentration, while the sensitivity is inversely proportional to the nanowire length. The proposed sensor showed good repeatability and a resolution better than 0.02 mg/dL for a doped type sensor with length of 3.5 μm in 30 applications with similar current-time response.
Article
Environmental Sciences
Rohan Benjankar, Ravin Kafle
Summary: The study developed EC-based sensors to measure salt concentrations in water bodies, with laboratory and field validations showing high accuracy and precision in predicting salt concentrations. The sensors were able to quantify salt concentrations in water bodies impacted by human activities, providing valuable insights for water managers, researchers, and agencies working on water quality and ecosystems.
WATER AIR AND SOIL POLLUTION
(2021)
Article
Chemistry, Analytical
Chun-He Quan, Xiao-Yu Zhang, Jong-Chul Lee
Summary: In this study, an SIW-based resonator that reacts to the complex permittivity variation of solutions with dimensions of 79.2 mm x 59.8 mm is introduced. The resonant structure was used to test different concentrations of ethanol-water and acetone-water mixtures for verification. The resonant frequency and quality factor (Q-factor) were found to vary with the relative complex permittivity of the liquid in the S-band, and the electric field distribution varied when liquid droplets were placed in the center of the substrate. The designed sensor operates at 2.45 GHz in the air, and the observed minimum resonant frequency shift with liquid was 15 MHz. The measurement error was approximately 3.1%, and the results reveal a relationship between the resonant frequency and temperature as well. Considering the observed sources of error, the measured relative permittivity is consistent with the actual values. The proposed sensor is economically convenient and suitable for various test environments.
Article
Optics
Cheng-Chih Hsu, Min-Rui Wu, Shih-Han Hung, Ju-Yi Lee, Chyan-Chyi Wu, Ching-Liang Dai
Summary: An enzymatic glucose sensor integrated into a heterodyne refractometer was used for glucose concentration detection, showing favorable performance in terms of stability and resolution. The method has potential application for monitoring blood glucose concentration.
OPTICAL ENGINEERING
(2021)
Article
Chemistry, Analytical
Danlei Li, Christopher Batchelor-McAuley, Richard G. Compton
Summary: An amperometric method was used to measure oxygen content in sheep's blood, with a linear relationship observed between chronoamperometric current and oxygen concentration. Additionally, this study presents the first investigation of direct voltammetry in sheep's blood and proposes a dissociative CE process to explain the electrochemical behavior of oxygen reduction.
Review
Optics
Pengqi Gong, Xuegang Li, Xue Zhou, Yanan Zhang, Ning Chen, Shankun Wang, Siqi Zhang, Yong Zhao
Summary: The paper provides a brief overview of the current research progress of optical fiber glucose sensor (OFGS), including detection principles and measurement methods, as well as discussing its shortcomings and future prospects.
OPTICS AND LASER TECHNOLOGY
(2021)
Article
Engineering, Chemical
Jose C. Diaz, Jovan Kamcev
Summary: Accurate measurements of membrane ionic conductivity are essential for understanding ion transport, but there is no standardized technique for such measurements. Discrepancies in reported ionic conductivity values for common commercial membranes are common. This study presents a non-invasive method based on electrochemical impedance spectroscopy to address external resistances in thin membranes equilibrated with dilute salt solutions.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Analytical
Xiao Chen, Hao Sun, Wei Huang, Jiayi Jin, Mingxu Su, Huinan Yang
Summary: A novel headspace oxygen concentration measurement (HOCM) sensor for vials was developed based on tunable diode laser absorption spectroscopy (TDLAS). The sensor was found to be non-invasive, with fast response and high accuracy, making it suitable for online quality supervision and management of production lines.
Article
Engineering, Environmental
Vishwesh Dutt Awasthi, Satya Prakash Singh, Shankar Ramachandran, Rajdip Bandyopadhyaya
Summary: This article introduces a low-cost portable device that enables fast measurement of arsenic levels in drinking water. The device utilizes an optimized concentration of a sensor reagent and a colorimeter-based method to measure absorbance, allowing for accurate measurement of As(V) and As(III) concentrations within a wide range in just 10 minutes. The device shows low interference from common ions and anions, and any phosphate interference can be eliminated with the use of appropriate resin.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Engineering, Manufacturing
Yang Xu, Ziqi Wang, Siyu Gong, Yong Chen
Summary: Traditional AM processes require supports that are wasteful and time-consuming. The new reusable support system uses dynamically controlled metal pins to significantly reduce the amount of supports needed, increasing efficiency and reliability.
ADDITIVE MANUFACTURING
(2021)
Article
Engineering, Electrical & Electronic
Zhuocheng Shentu, Juan Kang, Zhicheng Zhu, Lin Wang, Yong Guo, Ting Xu, Chunliu Zhao
Summary: This paper presents a novel no-core polydimethylsiloxane optical sensor suitable for large scale strain and concentration measurement with high sensitivity. Experimental results demonstrate good strain sensitivity and linear concentration measurement performance of the proposed sensor.
OPTICAL FIBER TECHNOLOGY
(2021)
Article
Chemistry, Analytical
Cheng-Chih Hsu, Wan-Yu Chung, Chun-Yi Chang, Chyan-Chyi Wu, Cheng-Ling Lee
Summary: In this study, a glucose fiber sensor incorporating heterodyne interferometry was developed to measure the phase difference caused by the chemical reaction between glucose and glucose oxidase (GOx). The results showed that the phase variation is inversely proportional to glucose concentration. The proposed method has a linear measurement range of glucose concentration from 10 mg/dL to 550 mg/dL and an optimum resolution better than 0.6 mg/dL.
Article
Energy & Fuels
Wenhao Chen, Xinxin Liu, Weiqing Liu, Yuanyuan Yu, Wenjie Wang, Yimao Wan
Summary: The pivotal structure of n-TOPCon solar cells consists of a heavily doped polysilicon layer and an ultrathin silicon oxide layer, providing excellent selectively carrier transport. The activated phosphorus concentration in the passivating contact structure plays a crucial role in the passivation quality and contact resistivity performance. Different activated phosphorus concentrations were achieved by adjusting PH3 flow rate, SiOx thickness, and activation temperature, and the best efficiency of over 24.8% was obtained with an activated phosphorus concentration of about 3 x 1020 cm-1.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Engineering, Electrical & Electronic
Ying Tian, Xing Li He, Ling Feng Li, Peng Li, Yun Jing Zhang
Summary: This article presents a miniaturized microwave sensor based on a cylindrical cavity for detecting the concentration of water-glucose solutions. The sensitivity of the sensor is enhanced by modifying the cavity and incorporating symmetrical metal wires. The proposed sensor outperforms traditional cavities in terms of measurement accuracy and sensitivity, and offers semiwireless and passive full-wireless measurement methods with potential applications in biological and chemical sensors.
IEEE SENSORS JOURNAL
(2023)
Article
Chemistry, Analytical
Hung-Chih Hsieh, Yi-Ming Lu, Ke-Cheng Huang
Summary: An accurate, easy setup, low-cost, and time-saving method for measuring glucose concentration was proposed. The method utilized a moving-grating-based heterodyne interferometry and a grating-based self-align sensor. The interference signal was created through the combination of diffraction lights from two moving gratings and polarization interference. The validity of the method was proven with a measurement resolution of 2 mg/dL.
Article
Chemistry, Analytical
Hua-Ju Shih, Ching-Liang Dai, Po-Jen Shih
Article
Chemistry, Multidisciplinary
Yu-Wei Chen, Chyan-Chyi Wu, Cheng-Chih Hsu, Ching-Liang Dai
APPLIED SCIENCES-BASEL
(2018)
Article
Chemistry, Analytical
Yen-Nan Lin, Ching-Liang Dai
Article
Chemistry, Analytical
Wnag-Lin Lee, Po-Jen Shih, Cheng-Chih Hsu, Ching-Liang Dai
Article
Chemistry, Analytical
Wei-Chun Shen, Po-Jen Shih, Yao-Chuan Tsai, Cheng-Chih Hsu, Ching-Liang Dai
Article
Chemistry, Analytical
Wei-Ren Chen, Yao-Chuan Tsai, Po-Jen Shih, Cheng-Chih Hsu, Ching-Liang Dai
Article
Physics, Applied
Hsin-Jou Wang, Tun-Yi Cheng, Cheng-Chun Huang, Ching-Yuan Su, Ching-Liang Dai, Yao-Chuan Tsai
Summary: In this study, electrochemical graphene was successfully attached to a polyester fabric to create a flexible fabric strain sensor with high gauge factor and sensitivity. The electromechanical performance and strain sensing properties of the sensor were evaluated through experiments, showing a high gauge factor within a specific strain range.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Analytical
Zung-You Tsai, Po-Jen Shih, Yao-Chuan Tsai, Ching-Liang Dai
Summary: This paper presents a radio frequency microelectromechanical system switch (MSS) manufactured by the CMOS process, which includes CPW lines, a membrane, and springs. The membrane is released by wet etching of the sacrificial oxide layer in the post-process. The experimental results show that the actuation voltage for the MSS is 10V, with an insertion loss of 0.9 dB at 41 GHz and isolation of 30 dB at 41 GHz.
Article
Optics
Shang-Yu Hsin, Cheng-Chih Hsu, Nien-Po Chen, Chen-Yu Ye, Guan-Yu Ji, Ke-Cheng Huang, Hung-Chih Hsieh, Chyan-Chyi Wu, Ching-Liang Dai
Summary: A design method and fabrication procedures for a dual frusto-conical reflector of a downlight luminaire are proposed, resulting in a luminaire with 70% optimum illuminance within an illumination area and efficiency up to 158 lm/W and 119 lm/W for different types of LEDs.
Article
Optics
Cheng-Chih Hsu, Min-Rui Wu, Shih-Han Hung, Ju-Yi Lee, Chyan-Chyi Wu, Ching-Liang Dai
Summary: An enzymatic glucose sensor integrated into a heterodyne refractometer was used for glucose concentration detection, showing favorable performance in terms of stability and resolution. The method has potential application for monitoring blood glucose concentration.
OPTICAL ENGINEERING
(2021)
Article
Chemistry, Analytical
Chi-Han Wu, Po-Jen Shih, Yao-Chuan Tsai, Ching-Liang Dai
Summary: A three-axis micro magnetic sensor is developed using standard 180 nm CMOS technology, with two magnetic sensing elements (MSEs) designed to reduce cross-sensitivity. The sensor includes an x/y-MSE and a z-MSE, with additional collectors incorporated in the x/y-MSE to increase sensing current and enhance sensitivity. Simulation results show high sensitivity in x and y directions, and slightly lower sensitivity in the z-axis direction.
Article
Materials Science, Multidisciplinary
Chi-Yuan Lee, Chin-Lung Hsieh, Chia-Hung Chen, Lung-Jieh Yang, Ching-Liang Dai, Chong-An Jiang, Yu-Chun Chen
Summary: This study aimed to develop a real-time micro-sensor for internal diagnosis of VRFB. By utilizing MEMS technology, a flexible, integrated (current, voltage, flow and temperature) micro-sensor was successfully developed and subjected to durability testing. The findings showed that encapsulation contributed to the stability of the micro-sensor.
Article
Chemistry, Analytical
Cheng-Chih Hsu, Wen-Kai Ho, Chyan-Chyi Wu, Ching-Liang Dai
Summary: In this study, enzymatic doped/undoped poly-silicon nanowire sensors with different lengths were fabricated using a top-down technique to measure glucose concentration. The sensitivity and resolution of these sensors correlate well with the dopant property and length of nanowire. Experimental results indicate that the resolution is proportional to the nanowire length and dopant concentration, while the sensitivity is inversely proportional to the nanowire length. The proposed sensor showed good repeatability and a resolution better than 0.02 mg/dL for a doped type sensor with length of 3.5 μm in 30 applications with similar current-time response.
Article
Chemistry, Analytical
Chi-Han Wu, Cheng-Chih Hsu, Yao-Chuan Tsai, Chi-Yuan Lee, Ching-Liang Dai
Summary: This study investigates the design, fabrication, and measurement of a MEMS three-axis magnetic field sensor (MFS) based on the commercial CMOS process. The MFS is a magnetic transistor type and its performance is analyzed using semiconductor simulation software. To reduce cross-sensitivity, the MFS incorporates two independent sensing components - a z-MFS for sensing magnetic field in the z-direction, and a y/x-MFS composed of a y-MFS and an x-MFS for sensing M-F in the y- and x-directions. The experimental results show that the MFS has a low cross-sensitivity of less than 3% and sensitivity values of 237 mV/T, 485 mV/T, and 484 mV/T for the z-, y-, and x-MFS respectively.
Article
Optics
Chyan-Chyi Wu, Cheng-Chih Hsu, Yu-Chian Lin, Chia-Wei Chiang, Ching-Lian Dai
CHINESE OPTICS LETTERS
(2017)
