Article
Chemistry, Multidisciplinary
Wenning Zhao, Fan Lin, Xiuxun Han
Summary: This study proposes a new strategy for the replication of nano-patterns, called centrifugal-force-driven nano-replication (CFDNR). It utilizes easily obtainable centrifugal force to fill the nanostructured template and replicate the nano-pattern on a polymer film. The results show excellent precision and the potential for facile, inexpensive, and high-precision nanomanufacturing.
Article
Engineering, Mechanical
Xiaodong Chen, Kang Tai, Huifeng Tan, Zhimin Xie
Summary: This paper addresses the issue of parasitic motion in microgripper jaws and its impact on clamping accuracy, and proposes a symmetrically stressed parallelogram mechanism as a solution. Through mechanical modeling and experimental validation, the effectiveness of this method is demonstrated.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2024)
Article
Automation & Control Systems
Sirshendu Saha, Saikat Kumar Bera, Saurabh Pal, Satish Chandra Bera
Summary: The paper presents a modified non-contact Hall sensor based centrifugal and momentum force type flow transducer with simple design, low cost, and rugged construction. By utilizing the difference in outputs of the Hall sensors, a DC voltage signal nonlinearly related to flow rate can be obtained through the movement of the balance lever.
Article
Materials Science, Multidisciplinary
Hongseok Oh, Shadi A. Dayeh
Summary: Highly sensitive force sensors of piezoelectric zinc oxide dual-gate thin film transistors are reported, along with an analytical model that elucidates the physical origins of their response. The dual-gate TFTs exhibited static and transient current changes under external forces, with an analytical model accurately portraying the piezoelectric response that modulates the energy-band edges and current-voltage characteristics. Demonstrating a field-tunable force response in single TFT, this work sheds light on the correlation between material properties and the force response in piezoelectric TFTs.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Materials Science, Multidisciplinary
Song- Han, Deborah A. Sarkes, Justin P. Jahnke, Margaret M. Hurley, Victor M. Ugaz, Rebecca L. Renberg, James J. Sumner, Dimitra N. Stratis-Cullum, Arum Han
Summary: This study presents a centrifugal force-based microfluidic biopanning platform for screening peptides with specific affinity towards target materials, allowing for precise control of wash steps by adjusting rotation speed. Through iterative sorting, strong affinity isolates towards gold, ITO or both are successfully obtained. Amino acid analysis provides insights into the distinctive attributes of these peptides and their material-binding capabilities. The platform is user-friendly and versatile, enabling rapid discovery of peptide-driven biomaterials and hybrid organic-inorganic materials.
ADVANCED MATERIALS TECHNOLOGIES
(2021)
Article
Engineering, Mechanical
Zekui Lyu, Zehao Wu, Qingsong Xu
Summary: This paper presents the design, modeling, optimization, simulation, and experimental study of a new asymmetric flexible microgripper driven by a piezoelectric actuator. The gripper design is guided by a new guideline and features a consistent working mode and non-dense mode of resonance. The gripper mechanism consists of a three-stage flexure amplification mechanism which achieves friction-free and clearance-free displacement amplification. The performance of the flexure hinge is optimized and the kinematic, static, and dynamic models of the gripper are derived. Simulations and experiments verify the working stroke, clamping force, and resonant frequency of the designed gripper.
MECHANISM AND MACHINE THEORY
(2022)
Article
Engineering, Electrical & Electronic
Chih-Hsin Shih, Yuan -Ting Cheng, Ho-Chin Wu, Chia -Lin Chang, Yi-Xiang Zhao
Summary: This paper presents a sequential liquid release approach through decanting. By coordinating the Euler and centrifugal forces under rapid deceleration, liquid can be effectively poured from a reservoir into a reaction chamber on a centrifugal platform. No valves are used in this approach. The decanting mechanism is analyzed and the parameters that control the volume of decanted liquid are investigated. It is found that the onset of the decanting phenomenon is determined by the Bond number. An eight-step sequential flow control design is proposed to robustly deliver reagents to the reaction chamber and facilitate a multistep process.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Engineering, Multidisciplinary
GuanYing Xing, Song Xue, Tao Hong, HuaiYu Zuo, XiaoBing Luo
Summary: A novel hydrodynamic suspension micropump without a grooved thrust bearing is proposed in this paper, which can levitate the rotating components in liquid without any mechanical friction. The mechanisms of suspension forces formation, the centrifugal effect, and the wedge effect are identified and the variation in suspension forces with rotor position is investigated. The prototype HSMP designed in this study shows a maximum output performance that is manyfold greater than other micropumps, demonstrating its simplicity, high power density, and high reliability.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2023)
Article
Automation & Control Systems
Renming Wang, Yili Hu, Dezhu Shen, Jijie Ma, Jianping Li, Jianming Wen
Summary: This article introduces a novel piezoelectric inchworm actuator driven by a single channel dc signal, aiming to simplify the excitation signal and achieve stable output displacement. The clamping force of the actuator is generated by a dc motor and permanent magnets, with a photoelectric sensor used to detect the position. A mathematical model is established for motion prediction.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Chemistry, Applied
Xinchao Liu, Jing Wang, Yongde Xia, Xinhuan Lu, Qinghua Xia, Dan Zhou
Summary: By comparing the synthesis routes, the study investigates the formation mechanism of the Ti-HSZ hollownest structure, revealing that the RH environment accelerates crystallization and facilitates the hierarchical pore structure formation. The research not only aids in understanding zeolites' crystallization mechanism, but also guides the design and synthesis of zeolite materials with unique morphological characteristics.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Biophysics
Lei Wang, Wuzhen Qi, Maohua Wang, Fan Jiang, Ying Ding, Xinge Xi, Ming Liao, Yanbin Li, Jianhan Lin
Summary: A portable pipette-adapted biosensor was developed using magnetic grid separation and nanocatalyst signal amplification for rapid detection of Salmonella typhimurium. The biosensor is affordable, sensitive, specific, user-friendly, rapid and robust, equipment-free and deliverable to endusers, making it suitable for in-field testing of foodborne pathogens to ensure food safety, especially in resource-constrained areas.
BIOSENSORS & BIOELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Nicola Lacalendola, Geoff R. Willmott
Summary: Ion pipette aspiration is a technique that combines micropipette aspiration and resistive pulse sensing to measure the mechanical properties of soft microparticles. By establishing a correlation between the mechanical properties derived from micropipette aspiration and the ion current measurement, the mechanical properties of particles can be predicted accurately.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Automation & Control Systems
Vladimir Kocovic, Djordje Vukelic, Sonja Kostic, Ivan Bijelic, Miljana Prica, Branko Tadic
Summary: The paper presents a novel process of micro-cutting by applying a constant penetration force of the cutting tool into the workpiece. The regulation of penetration force intensity is achieved by changing the mass, eccentricity, and angular velocity of the specially designed moving assembly. The applied method provides small cutting depths, reduced circularity deviation and roughness, and a more favorable distribution of the material in the surface layer.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Rongqi Wang, Xiaoqin Zhou, Haonan Meng, Baizhi Liu
Summary: This article introduces the application of pseudo-decoupling methods in two-degree-of-freedom piezoelectrically driven compliant mechanisms (2-DOF PDCMs). The article proposes a pseudo-decoupling method based on phase difference compensation (PDC) and an improved method based on elliptical parameter compensation (EPC), and optimizes and validates the performance of these two methods through finite element analysis and experiments.
Article
Materials Science, Multidisciplinary
Hanheng Du, Zhiwei Zhu, Zuankai Wang, Suet To
Summary: This study proposes a novel piezoelectrically actuated cutting system for fabricating high-aspect-ratio and hierarchical micro/nanostructure arrays. The mechanical structure is designed based on the circular flexure hinge, and a finite element model is established to analyze its resonant frequencies and mode shapes. The effectiveness and flexibility of the proposed cutting system are demonstrated by fabricating micro/nanostructure arrays with varying features.
MATERIALS & DESIGN
(2023)
