Vertically integrated nanogenerator based on ZnO nanowire arrays

Yu, Aifang; Li, Hongyu; Tang, Hao; Liu, Tengjiao; Jiang, Peng; Wang, Zhong Lin

doi:10.1002/pssr.201105120

Cited by 44 publications

(32 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The presence of a Schottky contact at least at one end of the nanowires is essential for the operation of the vertically integrated alternating nanogenerator. The output voltage could be greatly enhanced by linearly integrating a number of layers of vertically integrated alternating nanogenerators [432,554]. As shown in Fig.…”

Section: Alternating Current Nanogeneratorsmentioning

confidence: 99%

One-dimensional ZnO nanostructures: Solution growth and functional properties

2011

Self Cite

View full text Add to dashboard Cite

One-dimensional (1D) ZnO nanostructures have been studied intensively and extensively over the last decade not only for their remarkable chemical and physical properties, but also for their current and future diverse technological applications. This article gives a comprehensive overview of the progress that has been made within the context of 1D ZnO nanostructures synthesized via wet chemical methods. We will cover the synthetic methodologies and corresponding growth mechanisms, different structures, doping and alloying, positioncontrolled growth on substrates, and finally, their functional properties as catalysts, hydrophobic surfaces, sensors, and in nanoelectronic, optical, optoelectronic, and energy harvesting devices.

show abstract

Section: Alternating Current Nanogeneratorsmentioning

confidence: 99%

One-dimensional ZnO nanostructures: Solution growth and functional properties

2011

Self Cite

View full text Add to dashboard Cite

show abstract

“…The output voltage and current could be greatly enhanced by linearly integrating a number of nanogenerators together [89,90]. Three nanogenerators with individual output voltages of 80, 90, and 96 mV, respectively, were connected in series, leading to an output voltage of 0.243 V (Fig.…”

Section: Multilayered Alternating-current Nanogeneratormentioning

confidence: 99%

Oxide nanowire arrays for light-emitting diodes and piezoelectric energy harvesters

Wang

2011

Pure and Applied Chemistry

Self Cite

View full text Add to dashboard Cite

As an outstanding member in the oxide nanowire family, ZnO nanowire is widely studied for its optical, semiconductive, and piezoelectric properties. PbZr x Ti 1-x O 3 (PZT), usually in the form of polycrystalline thin films, is known for its high piezoelectric coefficient and is an ideal material as actuator. In this review, we first briefly introduce the rational growth of ZnO and PZT nanowire arrays by seedless wet chemical methods. Utilizing the ordered ZnO nanowires grown on p-type substrates, we next present an array of single ZnO nanowire-based blue/near-UV light-emitting diodes (LEDs), including their fabrication process, electroluminescence (EL) spectra, and external quantum efficiency. Finally, we discuss the piezoelectric ZnO and PZT nanowire-enabled three-dimensionally integrated direct-and alternating-current nanogenerators, and their primary roles in selfpowered nanosystems and for powering personal microelectronics.Oxide nanowire arrays for energy sciences 2173virtue of entropy increase, resulting in higher decomposition rate of HMTA. Therefore, at the initial stage of reaction, HMTA has already decomposed to a relatively large degree and produced sufficient OHfor ZnO growth, so the base of ZnO nanorods is thicker than at lower temperatures. As the supply of Zn 2+ gradually becomes exhausted, the diameter of the nanowire would gradually decrease, forming a pyramidal shape. The ZnO nanowires synthesized via this method are of low aspect ratios, typically 10 to 15 [12], which greatly limits their applications where flexible or high surface-to-volume ratio nanowires are needed. To increase the aspect ratio, capping agents such as ethylenediamine [16] and polyethylenimine [2] can be added. However, these capping agents might also introduce certain impurities into the ZnO nanowires, undermining their properties and performance. Without capping agents, improvement of the aspect ratio proved to be challenging, because reaction parameters such as precursor concentration, growth time, and growth temperature worked together in a convoluted manner toward the final growth product. Most reported studies employed inefficient cook-and-look methods, and lacked theoretical guidance in experimental design. Fig. 2 SEM images of ZnO nanowire arrays with an aspect ratio of (a) 15.1, (b) 20.1, (c) 20.9, and (d) 22.3, respectively, and (e) their corresponding reflectance spectra [15]. Oxide nanowire arrays for energy sciences 2177 Fig. 4 (a) Top view and (b) 60º tilt view of the ZnO nanowire arrays on a GaN substrate. Inset in (a) is enlarged image showing the in-plane alignment of the nanowires. (c) Top view and (d) 60º tilt view of a 200 × 200 μm patterned nanowire array with 1 μm in pitch [20]. Fabrication of the heterostructural LEDWhile the pursuit of stable and reproducible p-ZnO is still ongoing [38], heterojunctions of n-ZnO and p-GaN were employed as an alternative approach considering the similar crystallographic and electronic properties of ZnO and GaN. The design of the LED is shown in Fig. 7a. Ordered ZnO nan...

show abstract

“…Since then, a new group of energyharvesting nanosystem, known as nanogenerator, has been developed [6][7][8][9]. The most common configuration of a nanogenerator involves piezoelectric ZnO nanowire grown vertically on a silicon substrate [10]. The vertically grown array of ZnO nanowires is encapsulated with a polymer, which may be active or passive [11].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Effective Elastic, Piezoelectric, and Dielectric Properties of SU8/ZnO Nanocomposite for Vertically Integrated Nanogenerators Using Finite Element Method

Mishra

Krishna

Singh

et al. 2017

Journal of Nanomaterials

View full text Add to dashboard Cite

A nanogenerator is a nanodevice which converts ambient mechanical energy into electrical energy. A piezoelectric nanocomposite, composed of vertical arrays of piezoelectric zinc oxide (ZnO) nanowires, encapsulated in a compliant polymeric matrix, is one of most common configurations of a nanogenerator. Knowledge of the effective elastic, piezoelectric, and dielectric material properties of the piezoelectric nanocomposite is critical in the design of a nanogenerator. In this work, the effective material properties of a unidirectional, unimodal, continuous piezoelectric composite, consisting of SU8 photoresist as matrix and vertical array of ZnO nanowires as reinforcement, are systematically evaluated using finite element method (FEM). The FEM simulations were carried out on cubic representative volume elements (RVEs). Four different types of arrangements of ZnO nanowires and three sizes of RVEs have been considered. The volume fraction of ZnO nanowires is varied from 0 to a maximum of 0.7. Homogeneous displacement and electric potential are prescribed as boundary conditions. The material properties are evaluated as functions of reinforcement volume fraction. The values obtained through FEM simulations are compared with the results obtained via the Eshelby-MoriTanaka micromechanics. The results demonstrate the significant effects of ZnO arrangement, ZnO volume fraction, and size of RVE on the material properties.

show abstract

Vertically integrated nanogenerator based on ZnO nanowire arrays

Cited by 44 publications

References 8 publications

One-dimensional ZnO nanostructures: Solution growth and functional properties

One-dimensional ZnO nanostructures: Solution growth and functional properties

Oxide nanowire arrays for light-emitting diodes and piezoelectric energy harvesters

Evaluation of Effective Elastic, Piezoelectric, and Dielectric Properties of SU8/ZnO Nanocomposite for Vertically Integrated Nanogenerators Using Finite Element Method

Contact Info

Product

Resources

About