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Vol. 122, Issue 11, November 2010, pp.102-112



Electromechanical TiO2 Nanogenerators



1Department of Computer Science,

University of Verona, Strada Le Grazie 15, 37134 Verona, Italy

2Istituto Superior Tecnico (IST)

Universidade Tecnica de Lisboa, Av. Rovisco Pais 1- 1049-001 Lisboa, Portugal

E-mail: valerio.dallacasa@univr.it, filippo.dallacasa@gmail.com



Received: 12 August 2010   /Accepted: 18 November 2010   /Published: 30 November 2010


Abstract: We have developed a nanogenerator that is driven by mechanical forces to produce continuous direct-current output. The nanogenerator was fabricated with titanium dioxide nanoparticle arrays that were placed beneath a conducting electrode with a small gap. The force drives the electrode up and down to bend and/or vibrate the nanoparticles. A piezoelectric process converts mechanical energy into electricity. The electrode collects the output electricity from all of the nanoparticles. The approach presents an adaptable, mobile, and cost-effective technology for powering nanodevices by harvesting mechanical energy from the environment.


Keywords: Piezoelectric sensor, Electromechanical nanogenerator, Flexoelectricity in nanostructures


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