Nanomechanics Quantum Size Effects, Contacts, and Triboelectricity

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Nanomechanics Quantum Size Effects, Contacts, and Triboelectricity ( nanomechanics-quantum-size-effects-contacts-and-triboelectri )

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1.7 Objectives 13 i. Investigating whether quantum effects are of importance at the nano level. For example, as one or more dimensions in a material having free electrons become very small, the electron states are affected. To be specific we choose to model the bending of a metallic nanowire. If the nanowire can freely oscillate, will the oscillation frequency be quantized as the nanowire is bent? To answer this we have made a model of a free electron gas confined in the volume of a nanowire. ii. Modeling charged matter at nanocontact. Here, a model was made of ad- sorbed atoms (adatoms) affected by the electric field from a charged nano- sized tip. The adatoms are uncharged but have a dipole moment, which af- fects how the adatoms move in this inhomogeneous electric field. iii. Modeling the temperature dependency and propose charge transfer mecha- nisms. Here a two-level Schottky ion model was made, where the two energy levels correspond to the two surfaces that are brought in and out of contact. 2. Demonstrateanddescribelowspeedwindenergyconversionusingawinddriven TENG. An experiment with a generator in a table-top sized wind tunnel was per- formed, and a von Karman vortex model was developed and fitted to experimen- tal data.

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