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Article

Optimization of ZnO Nanorods Concentration in a Micro-Structured Polymeric Composite for Nanogenerators

Institute for Nanostructures, Nanomodelling and Nanofabrication (i3N)/Centro de Investigação em Materiais (CENIMAT), Department of Materials Science, NOVA School of Science and Technology (FCT-NOVA) and Center of Excellence in Microelectronics Optoelectronics and Processes (CEMOP)/Instituto de Desenvolvimento de Novas Tecnologias (UNINOVA), NOVA University Lisbon, Campus de Caparica, 2829-516 Caparica, Portugal
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Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Simas Rackauskas
Chemosensors 2021, 9(2), 27; https://doi.org/10.3390/chemosensors9020027
Received: 28 December 2020 / Revised: 27 January 2021 / Accepted: 28 January 2021 / Published: 31 January 2021
(This article belongs to the Special Issue Nanowire-Based Sensors)
The growing use of wearable devices has been stimulating research efforts in the development of energy harvesters as more portable and practical energy sources alternatives. The field of piezoelectric nanogenerators (PENGs) and triboelectric nanogenerators (TENGs), especially employing zinc oxide (ZnO) nanowires (NWs), has greatly flourished in recent years. Despite its modest piezoelectric coefficient, ZnO is very attractive due to its sustainable raw materials and the facility to obtain distinct morphologies, which increases its multifunctionality. The integration of ZnO nanostructures into polymeric matrices to overcome their fragility has already been proven to be fruitful, nevertheless, their concentration in the composite should be optimized to maximize the harvesters’ output, an aspect that has not been properly addressed. This work studies a composite with variable concentrations of ZnO nanorods (NRs), grown by microwave radiation assisted hydrothermal synthesis, and polydimethylsiloxane (PDMS). With a 25 wt % ZnO NRs concentration in a composite that was further micro-structured through laser engraving for output enhancement, a nanogenerator (NG) was fabricated with an output of 6 V at a pushing force of 2.3 N. The energy generated by the NG could be stored and later employed to power small electronic devices, ultimately illustrating its potential as an energy harvesting device. View Full-Text
Keywords: energy harvesting; nanogenerators; ZnO nanorods; microwave assisted hydrothermal synthesis; PDMS; micro-structuring energy harvesting; nanogenerators; ZnO nanorods; microwave assisted hydrothermal synthesis; PDMS; micro-structuring
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MDPI and ACS Style

dos Santos, A.; Sabino, F.; Rovisco, A.; Barquinha, P.; Águas, H.; Fortunato, E.; Martins, R.; Igreja, R. Optimization of ZnO Nanorods Concentration in a Micro-Structured Polymeric Composite for Nanogenerators. Chemosensors 2021, 9, 27. https://doi.org/10.3390/chemosensors9020027

AMA Style

dos Santos A, Sabino F, Rovisco A, Barquinha P, Águas H, Fortunato E, Martins R, Igreja R. Optimization of ZnO Nanorods Concentration in a Micro-Structured Polymeric Composite for Nanogenerators. Chemosensors. 2021; 9(2):27. https://doi.org/10.3390/chemosensors9020027

Chicago/Turabian Style

dos Santos, Andreia, Filipe Sabino, Ana Rovisco, Pedro Barquinha, Hugo Águas, Elvira Fortunato, Rodrigo Martins, and Rui Igreja. 2021. "Optimization of ZnO Nanorods Concentration in a Micro-Structured Polymeric Composite for Nanogenerators" Chemosensors 9, no. 2: 27. https://doi.org/10.3390/chemosensors9020027

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