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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2016.12
- 수록면
- 1,986 - 1,991 (6page)
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초록· 키워드
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Perpetual progress in nanofabrication enables the miniaturization of implantable medical devices, such as a pacemaker. This makes it possible to fit the pacemaker in a tiny capsule which can be implanted intravenously in a heart without leads. Nanoscale energy harvesting from human blood pressure has attracted enormous interests as a promising solution to permanently power a leadless intra-cardiac pacemaker. With this purpose in mind, we propose a multiphysics analytical model to predict the output voltage generated by a nanoscale dielectric plate considering the flexoelectricity, the surface effect, and the nonlocal effects. The flexoelectricity concerns a linear coupling between the strain gradient and the polarization. The existence of the strain gradient locally breaks the inversion symmetry, thereby rendering the formation of dipole moments in all dielectrics. The Kirchhoff plate theory is applied to analyze the bending behavior of the nanoscale dielectric plate. Based on the Gurtin-Murdoch theory, the surface elasticity is taken into consideration by the generalized Young-Laplace equations with non-classical boundary conditions. Hamilton’s principle is used to derive the differential equation of motion. The electrical circuit equation is derived by substituting the piezoelectric constitutive relation involving the higher-order gradient (nonlocal) terms into Gauss’s law. Finally, the output voltage is explicitly obtained under human blood pressure with the low-frequency variation of 1 Hz.
목차
Abstract
1. 서론
2. 심장 내 심박 조율기(Intra-Cardiac Pacemaker) 자가 구동 원리 및 구조
3. 굽힘-전기 효과, 비국소성, 표면 효과를 고려한 압전 재료의 선형 구성방정식
4. 나노스케일 혈압 에너지 하베스팅 성능 예측 모델
5. 결론
참고문헌
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UCI(KEPA) : I410-ECN-0101-2017-550-002050426