Scholarlink

<p>A microgripper with a piezoelectric actuator (PZT) uses boron nitride nanotubes (BNNTs) at its tip to achieve jaw displacements of 100&#xa0;nm. Size-dependent vibration response analysis of single-walled boron nitride nanotubes (SWBNNTs) is indispensable for achieving precise and well-controlled motion of the end effector. Euler–Bernoulli beam element based on modified couple stress theory has been utilised to analyse the size effect of SWBNNT. The modified couple stress theory requires only one size parameter for capturing the size effect. This parameter is commonly assumed to be constant. In our study, <i>l</i> is treated as size-dependent rather than constant. It has been demonstrated that the displacement increases linearly with the driving voltage for piezoelectrically driven ceramic plates in micro grippers. Micro grippers with SWBNNT are analysed using the finite element method to determine the dominant vibration mode during the grabbing and releasing of the nano-objects. Modal analysis indicates the first three natural frequencies at 459, 1300, and 2482&#xa0;Hz, with the first translational mode as the operating mode. Actuation is maintained well below 100&#xa0;Hz, avoiding resonance amplification. Effective mass analysis shows over 90% of the structural mass concentrated in the first three modes, ensuring predictable dynamics and minimal high-frequency vibrations. Overall, the microgripper demonstrates high precision, low resonance risk, and excellent operational stability, making it suitable for reliable nanomanipulation and biomedical applications.</p> Graphical Abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Size effect on vibrational characteristics of SWBN nanotubes in microgripper

  • 期刊论文

  • 发表日期：

    2026年2月5日

查看全文
  • Geetha Sundaram,
  • Varatharajan Prasannavenkadesan,
  • Ramanathan Kalimuthu,
  • Selvaraj Sathiyaseelan

摘要

A microgripper with a piezoelectric actuator (PZT) uses boron nitride nanotubes (BNNTs) at its tip to achieve jaw displacements of 100 nm. Size-dependent vibration response analysis of single-walled boron nitride nanotubes (SWBNNTs) is indispensable for achieving precise and well-controlled motion of the end effector. Euler–Bernoulli beam element based on modified couple stress theory has been utilised to analyse the size effect of SWBNNT. The modified couple stress theory requires only one size parameter for capturing the size effect. This parameter is commonly assumed to be constant. In our study, l is treated as size-dependent rather than constant. It has been demonstrated that the displacement increases linearly with the driving voltage for piezoelectrically driven ceramic plates in micro grippers. Micro grippers with SWBNNT are analysed using the finite element method to determine the dominant vibration mode during the grabbing and releasing of the nano-objects. Modal analysis indicates the first three natural frequencies at 459, 1300, and 2482 Hz, with the first translational mode as the operating mode. Actuation is maintained well below 100 Hz, avoiding resonance amplification. Effective mass analysis shows over 90% of the structural mass concentrated in the first three modes, ensuring predictable dynamics and minimal high-frequency vibrations. Overall, the microgripper demonstrates high precision, low resonance risk, and excellent operational stability, making it suitable for reliable nanomanipulation and biomedical applications.

Graphical Abstract