التفاصيل البيبلوغرافية
| العنوان: |
Low-Voltage High-Frequency Lamb-Wave-Driven Micromotors. |
| المؤلفون: |
Wang, Zhaoxun, Wei, Wei, Zhang, Menglun, Duan, Xuexin, Li, Quanning, Chen, Xuejiao, Yang, Qingrui, Pang, Wei |
| المصدر: |
Micromachines; Jun2024, Vol. 15 Issue 6, p716, 8p |
| مصطلحات موضوعية: |
LAMB waves, MICROMOTORS, ACOUSTIC streaming, HYDRAULIC couplings, ANGULAR velocity, IMPEDANCE matching, WAVE energy |
| مستخلص: |
By leveraging the benefits of a high energy density, miniaturization and integration, acoustic-wave-driven micromotors have recently emerged as powerful tools for microfluidic actuation. In this study, a Lamb-wave-driven micromotor is proposed for the first time. This motor consists of a ring-shaped Lamb wave actuator array with a rotor and a fluid coupling layer in between. On a driving mechanism level, high-frequency Lamb waves of 380 MHz generate strong acoustic streaming effects over an extremely short distance; on a mechanical design level, each Lamb wave actuator incorporates a reflector on one side of the actuator, while an acoustic opening is incorporated on the other side to limit wave energy leakage; and on electrical design level, the electrodes placed on the two sides of the film enhance the capacitance in the vertical direction, which facilitates impedance matching within a smaller area. As a result, the Lamb-wave-driven solution features a much lower driving voltage and a smaller size compared with conventional surface acoustic-wave-driven solutions. For an improved motor performance, actuator array configurations, rotor sizes, and liquid coupling layer thicknesses are examined via simulations and experiments. The results show the micromotor with a rotor with a diameter of 5 mm can achieve a maximum angular velocity of 250 rpm with an input voltage of 6 V. The proposed micromotor is a new prototype for acoustic-wave-driven actuators and demonstrates potential for lab-on-a-chip applications. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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