Dynamic behavior of piezoelectric ZnO nanowires is investigated using finite element analyses (FEA) on FE models constructed based on previous experimental observations in which nanowires having aspect ratios of 1:2. 1:31, and 1:57 are obtained during a hydrothermal process. Modal analyses predict that nanowires will vibrate in lateral bending, uniaxial elongation/contraction, and twisting (torsion), respectively, for the three ratios. The natural frequency for each vibration mode varies depending on the aspect ratio, while the frequencies are in a range of 7.233 MHz to 3.393 GHz. Subsequent transient response analysis predicts that the nanowires will behave quasi-statically within the load frequency range below 10 MHz, implying that the ZnO nanowires have application potentials as structural members of electromechanical systems including nano piezoelectric generators and piezoelectric dynamic strain sensors. When an electric pulse signal is simulated, it is predicted that the nanowires will deform in accordance with the electric signal. Once the electric signal is removed, the nanowires exhibit a specific resonance-like vibration, with the frequency synchronized to the signal frequency. These predictions indicate that the nanowires have additional application potential as piezoelectric actuators and resonators.

Abstract
1.서 론
2. 유한요소 해석
    2.1 해석모델
    2.2 유한요소 해석 절차 및 방법
    2.3 소재 물성
    2.4 단위계
3. 결과 및 고찰
    3.1 진동모드와 공진주파수(Modal Analysis)
    3.2 과도응답 특성(Transient Response Analysis)
    3.3 전기신호에 의한 가진(Excitation) 특성
    3.4 소자설계 방안
4. 결 론
References

• 이웅(창원대학교 신소재공학부) | Woong Lee (School of Materials Science and Engineering, Changwon National University) Corresponding author