Ultra-long vertically aligned lead titanate nanowire arrays for energy harvesting in extreme environments

Nafari, Alireza; Bowland, Christopher C.; Sodano, Henry A.

doi:10.1016/j.nanoen.2016.11.015

Cited by 33 publications

(14 citation statements)

References 26 publications

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“…The advancement of nanotechnology has greatly accelerated the miniaturization of electronic and mechanical devices, particularly, the nanoelectromechanical system (NEMS) [1,2]. Benefited from the intriguing attributes, NEMS exhibits revolutionary functionalities which enable broad applications such as chemical and biological sensors [3], mass sensor or radiofrequency signal processing [4], drug delivery and imaging [5], and energy harvesting [6]. To facilitate various applications, NEMS is usually devised from the integration of multiple electronic and mechanical components [7], such as actuators, transistor, resonators, and motors.…”

Section: Introductionmentioning

confidence: 99%

Graphene helicoid as novel nanospring

Zhan

Zhang

Yang

et al. 2017

Carbon

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Advancement of nanotechnology has greatly accelerated the miniaturization of mechanical or electronic devices/components. This work proposes a new nanoscale spring -a graphene nanoribbon-based helicoid (GH) structure by using large-scale molecular dynamics simulation. It is found that the GH structure not only possesses an extraordinary high tensile deformation capability, but also exhibits unique features not accessible from traditional springs. Specifically, its yield strain increases when its inner radius is enlarged, which can exceed 1000%, and it has three elastic deformation stages including the initial delamination, stable delamination and elastic deformation. Moreover, the failure of the GH is found to be governed by the failure of graphene nanoribbon and the inner edge atoms absorb most of the tensile strain energy. Such fact leads to a constant elastic limit force (corresponding to the yield point) for all GHs. This study has provided a comprehensive understanding of the tensile behaviors of GH, which opens the avenue to design novel nanoscale springs based on 2D nanomaterials.

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Section: Introductionmentioning

confidence: 99%

Graphene helicoid as novel nanospring

Zhan

Zhang

Yang

et al. 2017

Carbon

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“…This PNG was used to stimulate the frog's sciatic nerve and induce a contraction of a frog's gastrocnemius by producing an ultrahigh output voltage of 209 V and a current density of 23.5 μA cm À2 . Nafari et al [83] fabricated PT NW arrays to harvest vibrational energy at a very high temperature condition (up to 375 C). PT NW arrays generated a peak voltage of 0.56 V for temperature ranging from 25 to 300 C. However, beyond 300 C, the output voltage decreases gradually.…”

Section: Lead Zirconate Titanate (Pzt)mentioning

confidence: 99%

A Comprehensive Review on Piezoelectric Polymeric and Ceramic Nanogenerators

2022

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With the increasing concerns over global warming and the growing demands for electricity, many researchers have considered renewable and sustainable resources for electricity/power generation. [1] Photovoltaics, thermoelectric, and electromagnetic induction are among the well-established technologies for electricity generation. [2] Mechanical energy is one of the most abundant and available resources that can be harvested to generate electricity. For example, mechanical energy is available in the form of human body motion and mechanical vibration. [3][4][5][6] Piezoelectric and triboelectric nanogenerators have both been used for mechanical energy harvesting. In triboelectric nanogenerators, electrical energy originates mainly from friction or temporary contact of two different layers. However, a wide range of deformation modes like bending, stretching, and vibration can generate electricity using piezoelectric nanogenerators (PNGs). The working mechanisms of PNGs are typically easier than triboelectric nanogenerators. [7] In addition, improving electrical output and reproducibility of triboelectric nanogenerators are still challenges. [8] The use of ferroelectric materials is a promising choice for energy harvesting. Ferroelectric materials show both piezoelectric (generation of electrical power from mechanical oscillation) and pyroelectric (generation of electricity from temperature fluctuation) properties. [9,10] Piezoelectric property offers conversion of mechanical energy to electricity. By applying mechanical stress, dipole momentum forms, leading to spontaneous polarization. Consequently, the electric current flows through the piezoelectric materials as a result of charge accumulation. [11] A wide range of piezoelectric materials is used as PNGs. Piezoelectric materials can be categorized into ceramics, polymers, and piezoelectret polymers. Materials with perovskite or wurtzite nanostructures show piezoelectric properties because their crystals are noncentral symmetry. Ceramics with perovskite

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“…83 In recent years, however, the scalable synthesis as well as the ultra-long morphology have been developed through the modulated chemistry. [84][85][86][87] (Na 1/2 Bi 1/2 )TiO 3 (NBT or BNT), another promising candidate for lead-free piezoelectric materials, was rstly released in 1960. 88,89 It possesses a perovskite structure at room temperature with a sequence of phase transitions from cubic to tetragonal to rhombohedral at temperatures of $540 C and $300 C, respectively.…”

Section: Types Of Lead-free Piezoelectric Nanomaterialsmentioning

confidence: 99%