Article
Nanoscience & Nanotechnology
Junshi Li, Yundong Ma, Dong Huang, Zhongyan Wang, Zhitong Zhang, Yingjie Ren, Mengyue Hong, Yufeng Chen, Tingyu Li, Xiaoyi Shi, Lu Cao, Jiayan Zhang, Bingli Jiao, Junhua Liu, Hongqiang Sun, Zhihong Li
Summary: The researchers have developed a flexible MNA electrode that can fit a curved body surface, penetrate the skin without fracture, and be mass-produced with a simplified process. The electrode is compatible with wearable wireless systems and has a short preparation time, improving the comfort and convenience of electrophysiological recording.
NANO-MICRO LETTERS
(2022)
Article
Neurosciences
Patrique Fiedler, Carlos Fonseca, Eko Supriyanto, Frank Zanow, Jens Haueisen
Summary: The new dry 256-channel HD-EEG electrode cap overcomes the principal limitations of HD-EEG in terms of preparation complexity, allowing rapid application by non-medically trained individuals, and enabling new use cases for HD-EEG. The dry electrodes make recording with state-of-the-art EEG amplifiers easier, while also demonstrating superior performance and wearing comfort.
HUMAN BRAIN MAPPING
(2022)
Article
Nanoscience & Nanotechnology
Yue Hou, Zhaoyu Li, Ziyu Wang, Hongyu Yu
Summary: In long-term health monitoring, a flexible MAE on a Miura-ori structured substrate demonstrates superior accuracy and long-term stability in bio-signal recordings such as ECG and EMG. The device shows enhanced performance in device reliability and air ventilation through two-directional in-plane bendability and air-circulating channels, indicating great potential in health monitoring applications.
MICROSYSTEMS & NANOENGINEERING
(2021)
Article
Multidisciplinary Sciences
Wonryung Lee, Seung-Hwan Jeong, Young-Woo Lim, Hyunhwan Lee, Joohyuk Kang, Hyunjae Lee, Injun Lee, Hyung-Seop Han, Shingo Kobayashi, Masaru Tanaka, Byeong-Soo Bae
Summary: The study developed a microneedle sensor on a hybrid substrate based on high Young's modulus epoxy siloxane and low Young's modulus polydimethylsiloxane, successfully achieving a microneedle sensor array on a flexible substrate. Mechanical durability was assessed through insertion into pig skin 1000 times, and the utility of flexible microneedle pH sensors in monitoring pH distribution in a disease model was demonstrated.
Article
Chemistry, Physical
Sabria Benrabah, Maxime Legallais, Pascal Besson, Simon Ruel, Laura Vauche, Bernard Pelissier, Chloe Thieuleux, Bassem Salem, Matthew Charles
Summary: This study explores the impact of several wet etchants commonly encountered in the microelectronic industry on the surface chemistry of GaN on silicon. Phosphoric acid treatment is found to significantly modify the surface and enable the recovery of the surface morphology. The study proposes a promising treatment method for the recovery of good quality GaN surfaces after dry etching.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Chao-Ching Chiang, Xinyi Xia, Jian-Sian Li, Fan Ren, S. J. Pearton
Summary: Patterning of NiO/Ga2O3 heterojunctions requires development of selective wet and dry etch processes. Wet etching of NiO using 1:4 HNO3:H2O solution showed measurable etch rates above 40 degrees C, with infinite selectivity over β-Ga2O3 below 55 degrees C. Dry etching using Cl-2/Ar plasma achieved etch rates up to 800 angstrom.min(-1), with maximum selectivities for β-Ga2O3.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Review
Biochemical Research Methods
Junxia Wang, Ziyi Lu, Ruisi Cai, Hanqi Zheng, Jicheng Yu, Yuqi Zhang, Zhen Gu
Summary: This paper presents an overview of state-of-the-art microneedle-based detection and sensing systems. Firstly, the designs of microneedle devices based on extraction mechanisms are summarized, including different geometries and materials of microneedles. Secondly, the targets of equipment-assisted microneedle detections are discussed, revealing the current performance and potential scenarios of these microneedles. Thirdly, the trend towards highly integrated sensors is elaborated by emphasizing the sensing principles (colorimetric, fluorometric and electronic manner). Finally, the key challenges and future development perspectives are discussed.
Article
Pharmacology & Pharmacy
Conor O'Mahony, Ryan Sebastian, Fjodors Tjulkins, Derek Whelan, Andrea Bocchino, Yuan Hu, Joe O'Brien, Jim Scully, Margaret Hegarty, Alan Blake, Ines Slimi, A. James P. Clover, Alexander Lyness, Anne-Marie Kelleher
Summary: This paper describes a method for fabricating arrays of hollow silicon microneedles using only two bulk silicon etches. The microneedle arrays show biomechanical reliability and have the potential to be used for transdermal delivery and diagnostics.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Chemistry, Analytical
Ming-Nan Chien, Shih-Hao Fan, Chi-Huang Huang, Chien-Chen Wu, Jung-Tung Huang
Summary: In this study, a low-cost continuous lactate monitoring system (CLMS) is developed based on a percutaneous microneedle array that uses a three-electrode lactate sensor. The CLMS can provide real-time monitoring of lactate levels during exercise and assess the feasibility of evaluating exercise performance and training intensity.
Article
Chemistry, Multidisciplinary
Khakimjon Saidov, Ivan Erofeev, Zainul Aabdin, Antoine Pacco, Harold Philipsen, Antony Winata Hartanto, Yifan Chen, Hongwei Yan, Weng Weei Tjiu, Frank Holsteyns, Utkur Mirsaidov
Summary: A method of precise and uniform wet etching for molybdenum (Mo) and other metals is presented, which overcomes the challenge of non-uniform etch profiles in wet chemical etching of polycrystalline metals. This method combines multiple cycles of cryo-oxidation and selective oxide dissolution to achieve the desired smooth and uniform nanostructures.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Biomedical
Yingying Wang, Lelun Jiang, Lei Ren, Pingao Huang, Mei Yu, Lan Tian, Xiangxin Li, Jun Xie, Peng Fang, Guanglin Li
Summary: The use of microneedle electrode array improves the quality of electrophysiological signal recordings on human body surface with lower interface impedance and more stable signal recording characteristics. It enables high-quality electromyography and electrocardiography recordings, without causing discomfort. Microneedles penetrate through the corneum and reach the epidermis to fix electrodes on the body surface for high-quality signal recording, especially during body movements.
IEEE TRANSACTIONS ON BIOMEDICAL ENGINEERING
(2021)
Article
Engineering, Electrical & Electronic
Abolfazl Harati, Amir Jahanshahi
Summary: A relatively inexpensive, flexible, and stretchable dry electrode for EEG recording is presented in this study. The electrode demonstrates good mechanical and electrical reliability, with electrical performance similar to standard wet Ag/AgCl electrodes. The mechanical endurance of the electrode is verified through custom-designed stroke tests under relatively severe conditions.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Review
Engineering, Electrical & Electronic
Rui M. R. Pinto, Ved Gund, Carlos Calaza, K. K. Nagaraja, K. B. Vinayakumar
Summary: This review introduces the wet and dry etching methods for aluminum nitride (AlN) thin-films, and discusses the effects of etching parameters on the overall surface characteristics.
MICROELECTRONIC ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Jialei Zhu, Fuqin Wang, Jiaying Chen, Chang Liu
Summary: This article presents a method for glucose detection by depositing Cu2O nanoparticles on a stainless steel needle electrode and further preparing CoCu-LDH nanosheets. The unique morphology of the materials accelerates electron transport and provides more active centers for glucose sensing. The developed sensor showed good performance and stability in glucose analysis.
Article
Instruments & Instrumentation
Afsoun Khosraviboroujeni, Seyedeh Zahra Mirdamadian, Mohsen Minaiyan, Azade Taheri
Summary: The study described the preparation of reservoir-based BPMNAs containing estradiol valerate using a combination of FDM 3D printing and injection volume filling techniques. The 3D printed PLA microneedles were able to release estradiol valerate for up to 7 days and successfully penetrate through the stratum corneum into the skin.
DRUG DELIVERY AND TRANSLATIONAL RESEARCH
(2022)
Article
Physics, Multidisciplinary
Jin-Jin Tang, Gui-Peng Liu, Jia-Yu Song, Gui-Juan Zhao, Jian-Hong Yang
Summary: By solving coupled Schrodinger's and Poisson's equations and using SRIM simulation software, the study investigates how proton irradiation affects the concentration of 2DEG in GaN-based HEMTs. It is found that proton irradiation leads to the appearance of a large number of Ga vacancies inside the device, affecting the Fermi level and trapping the two-dimensional electrons. The concentration of 2DEG is significantly reduced due to these two mechanisms of proton irradiation.
Article
Optics
Xu Han, Huifu Xiao, Yongheng Jiang, Guanghui Ren, Pu Zhang, Jianzong Tan, Jianhong Yang, Arnan Mitchell, Yonghui Tian
Summary: This paper introduces a 4x4 non-blocking optical router that can passively assign signals carried by optical wavelength and mode channels to output ports, achieving non-blocking performance. The device utilizes 8 mode (de)multiplexers and a 4x4 microring-based grid network, fabricated on a silicon-on-insulator platform using standard CMOS processes. Experimental results show low insertion loss and crosstalk, demonstrating the feasibility of scaling the device.
Article
Chemistry, Physical
Shu'an Xing, Guijuan Zhao, Yan Xu, Jie Wang, Xunshuan Li, Wenge Yang, Guipeng Liu, Jianhong Yang
Summary: The valence band offset of h-BN/WS2 heterojunction was experimentally measured, along with the determination of conduction band offset, revealing a type-I band alignment. This measurement is crucial for analyzing and designing devices based on h-BN/WS2.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
Hongxia Wang, Miaomiao Liao, Huifu Xiao, Xu Han, Yongheng Jiang, Jianzong Tan, Pu Zhang, Jingfeng Shao, Yonghui Tian, Jianhong Yang
Summary: A bow-shaped fiber structure (BFS) was fabricated using a simple knotting method, with adjustable extinction ratio for application in strain or displacement sensors. The temperature sensing performance was greatly enhanced by embedding the microfiber region in a PDMS layer, showing promising potential for future applications.
OPTICS COMMUNICATIONS
(2021)
Article
Physics, Multidisciplinary
Heyuan Huang, Wenge Yang, Shu'an Xing, Guijuan Zhao, Xunshuan Li, Guipeng Liu, Jianhong Yang
Summary: This study reports the band alignment parameters of ReS2/BN van der Waals heterojunction grown by CVD, with a type-I band alignment determined by XPS. The measured VBO and CEO values make this heterojunction a reference for electronic and photoelectric devices, as well as a good choice for CMOS transistor substrates and gate dielectrics.
Article
Engineering, Electrical & Electronic
Haoxiang Chen, Hao Jia, Tao Wang, Jianhong Yang
Summary: The paper introduces a gradient-oriented binary search method for photonic device design, which accelerates convergence speed and eliminates the need for additional binarization steps compared to direct binary search methods. By designing a bimodal interferometer and other devices, the universality and fast optimization speed of the method are verified.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Huifu Xiao, Xu Han, Yongheng Jiang, Guanghui Ren, Arnan Mitchell, Daqiang Gao, Jianhong Yang, Yonghui Tian
Summary: The article introduces a novel scheme of optical logic operations using optical switches, demonstrating an integrated photonic circuit on a silicon-on-insulator substrate capable of performing five different optical logic operations with correct results, high signal-to-noise ratios, and a speed of 10 Kbps.
Article
Materials Science, Multidisciplinary
Xiaoxing Guo, Wenting Zhang, Jinchao Yin, Yan Xu, Yujie Bai, Jianhong Yang
Summary: Research shows that optimizing functional layers or introducing appropriate auxiliary operation signals can optimize the performance of organic memory devices. Using Ag@SiO2 core-shell nanospheres as the floating gate-tunneling layer in the floating-gate organic memory device shows promising results in achieving the best and reliable nonvolatile memory characteristics.
ORGANIC ELECTRONICS
(2021)
Article
Physics, Multidisciplinary
Jinjin Tang, Guipeng Liu, Bangyao Mao, Salamat Ali, Guijuan Zhao, Jianhong Yang
Summary: The introduction of AlGaN back-barrier improves the high-frequency performance of AlGaN/AlN/GaN HEMTs and its impact on the irradiation tolerance of GaN-based HEMTs is investigated. The calculation results show that HEMTs with back-barrier exhibit more significant decrease in 2DEG density and mobility after proton irradiation compared to those without back-barrier, providing valuable suggestions for designing radiation-resistant GaN-based HEMTs.
Article
Engineering, Electrical & Electronic
Xu Han, Huifu Xiao, Guanghui Ren, Yongheng Jiang, Arnan Mitchell, Jianhong Yang, Yonghui Tian
Summary: This paper presents an on-chip non-blocking mode exchanger based on a mesh network of interconnected Mach-Zehnder interferometers, demonstrating successful non-blocking mode exchange among multiple optical modes on a silicon-on-insulator platform with superior performance.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Nanoscience & Nanotechnology
Xiurui Lv, Yan Xu, Bangyao Mao, Guipeng Liu, Guijuan Zhao, Jianhong Yang
Summary: Strain engineering is a crucial method for manipulating material properties. Studies on monolayer MoSi2N4 have shown that in-plane strain can effectively change its electronic and optical properties, paving the way for the design of strain-modulated optoelectronic devices.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2022)
Article
Physics, Applied
Xiurui Lv, Heyuan Huang, Bangyao Mao, Guipeng Liu, Guijuan Zhao, Jianhong Yang
Summary: This study investigates the structure, electronic properties, and carrier mobility of 2D Janus MoSiGeN4 bilayer structure under different stacks. The results show that the dipole moment perpendicular to the x-y plane plays a crucial role in regulating the bandgap. The bilayer structure has a significant effect on the bandgap and exhibits type II energy band alignment, leading to improved electron mobility.
APPLIED PHYSICS LETTERS
(2022)
Article
Engineering, Electrical & Electronic
Haoxiang Chen, Tao Wang, Jianhong Yang, Hao Jia
Summary: This paper proposes a new concept of mode converter, which is both robust to wavelength variation and has an ultracompact footprint. By designing two different prototypes, efficient mode conversion is achieved. The simulation results show that the devices have low insertion loss and high signal-to-noise ratios within the wavelength range of 1500-1600 nm.
IEEE PHOTONICS JOURNAL
(2022)
Article
Engineering, Electrical & Electronic
Heyuan Huang, Guijuan Zhao, Bangyao Mao, Xiurui Lv, Xingliang Wang, Wanting Wei, Guipeng Liu, Jianhong Yang
Summary: In this study, a suspended multilayer WSe2 photodetector was built using van der Waals contacts, achieving a balance between responsivity and response speed. The device showed good response in visible wavelengths, with higher responsivity than substrate-supported photodetectors. The improvement in performance was mainly attributed to the weakening of the Schottky barrier and the manipulation of the interfacial coupling effect.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Engineering, Electrical & Electronic
Hongxia Wang, Miaomiao Liao, Huifu Xiao, Zhenfu Zhang, Junbo Yang, Jianhong Yang, Yonghui Tian
Summary: An all-optical tunable polymer bottle micro-resonator was proposed and demonstrated using a droplet dispensing method. The experimental results showed that the fabricated device has advantages of high tuning efficiency, small size, easy fabrication, and extremely low cost.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2021)
