Output Potential of ZnO Nanowires: Influence of Geometrical Parameters

• Type: Article in International Scientific Journal
• Date: 2016

Authors

Oliveira, FF (Author) Other; proenca, m. p. (Author) FCUP; araujo, j. p. (Author) FCUP; ventura, j. (Author) FCUP

Journal

Title: Journal of Nanoscience and Nanotechnology

Vol. 16

Pages: 8533-8537

ISSN: 1533-4880

Publisher: American Scientific Publishers

Indexing

ISI Web of Knowledge - 2 Citations

Scopus - 3 Citations

Other information

Authenticus ID: P-00K-NZE

DOI: 10.1166/jnn.2016.10729

Abstract (EN): Energy harvesting through nanogenerator devices is a novel technologic development that can open new ways on energy recovery and energetic independency on our lives. Amongst others, piezoelectric nanogenerators, which convert mechanical into electrical energy, show great promise due to their diverse applications and easy deformation through pressure, bending or twisting. For the fabrication and optimization of such devices, it is highly important to determine the maximum output energy attainable from typical deformation forces. In this work, we simulated hexagonal piezoelectric zinc oxide nanowires, the main components of piezoelectric nanogenerator devices, and studied the influence of the corresponding geometric parameters (height and width) on the output potential upon a parallel or perpendicular applied force. For the former, the output potential was found to depend only on the width of the nanowire, exponentially increasing with decreasing width up to 1.2 V. On the other hand, for a perpendicular force, the obtained output values are much higher (reaching a maximum of 72.2 V), increasing linearly with increasing height and exponentially with decreasing width. Our results thus allow one to better tune the geometry of the piezoelectric nanowires and to optimize the future fabrication of nanodevices.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5