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Nanoscale Device PhysicsScience and Engineering Fundamentals$
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Sandip Tiwari

Print publication date: 2017

Print ISBN-13: 9780198759874

Published to Oxford Scholarship Online: August 2017

DOI: 10.1093/oso/9780198759874.001.0001

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Electromechanics and its devices

Electromechanics and its devices

(p.411) 5 Electromechanics and its devices
Nanoscale Device Physics

Sandip Tiwari

Oxford University Press

Electromechanics—coupling of mechanical forces with others—exhibits a continuum-to-discrete spectrum of properties. In this chapter, classical and newer analysis techniques are developed for devices ranging from inertial sensors to scanning probes to quantify limits and sensitivities. Mechanical response, energy storage, transduction and dynamic characteristics of various devices are analyzed. The Lagrangian approach is developed for multidomain analysis and to bring out nonlinearity. The approach is extended to nanoscale fluidic systems where nonlinearities, fluctuation effects and the classical-quantum boundary is quite central. This leads to the study of measurement limits using power spectrum and, correlations with slow and fast forces. After a diversion to acoustic waves and piezoelectric phenomena, nonlinearities are explored in depth: homogeneous and forced conditions of excitation, chaos, bifurcations and other consequences, Melnikov analysis and the classic phase portaiture. The chapter ends with comments on multiphysics such as of nanotube-based systems and electromechanobiological biomotor systems.

Keywords:   Multiscale, Multiphysics, Inertial frame, Mechanical response, Lagrangian, Hamiltonian, Conjugate variables, Beam response, Plate response, Pull in, Eigenmode analysis, Navier-Stokes equation, Equipartition of energy, Fluctuations, Power spectrum, Sensitivity, Slow force, Fast force, Acoustic wave, Chaos, Bifurcation, Feigenbaum delta, Melnikov analysis, Duffing oscillator, Lennard Jones potential

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