In-situ stretching strain-driven high piezoelectricity and enhanced electromechanical energy-harvesting performance of a ZnO nanorod-array structure

Choi, Hong Je; Jung, Ye Seul; Han, Ju; Cho, Yong Soo

doi:10.1016/j.nanoen.2020.104735

Cited by 45 publications

(22 citation statements)

References 36 publications

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“…There is no experimental report using the biaxial stress in AlN to modify the piezoelectric modulus reported in the literature. However, two recent reports on different materials support our interpretation: (1) stretching ZnO nanorods increases the piezoelectric coefficient 45 and (2) in situ XRD on Lead Zirconium Titanate confirms the direct correlation between piezoelectric polarization and the crystallography. 46 A known method to increase the piezoelectric modulus is alloying with trivalent rare-earth metals or effective trivalent clusters.…”

Section: Articlesupporting

confidence: 74%

Enhancing the piezoelectric modulus of wurtzite AlN by ion beam strain engineering

Fiedler

Leveneur

Mitchell

et al. 2021

Applied Physics Letters

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The piezoelectric modulus of wurtzite aluminum nitride (AlN) is a critical material parameter for electrical components, ultimately contributing to the energy efficiency and achievable bandwidth of modern communication devices. Here, we demonstrate that the introduction of metallic point-defects (Ti, Zr, Hf) improves the piezoelectric modulus of as-received, unstrained, epitaxially grown AlN. The metals are incorporated by ion implantation with an acceleration energy of 30 keV to a fluence of 10 15 at cm À2 , which causes an elongation along the wurtzite c-axis. The stored internal strain energy increases the piezoelectric polarization of the thin AlN layer. This can equivalently be described by an enhancement of the piezoelectric modulus d 33 . The incorporation of 0.1 at. % Ti enhances the piezoelectric modulus by $30%; significantly exceeding gains obtained by alloying with the same amount of Sc.

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Section: Articlesupporting

confidence: 74%

Enhancing the piezoelectric modulus of wurtzite AlN by ion beam strain engineering

Fiedler

Leveneur

Mitchell

et al. 2021

Applied Physics Letters

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“…Then, the ZnO nanorods (ZNRs) were hydrothermally grown on the seed layer in an aqueous growth solution composed of zinc nitrate and hexamethylenetetramine. [23] Then, the as-grown ZNRs were immersed in an aqueous NaOH solution to produce ZnO nanotubes (ZNTs) by selectively etching the polar facet (001) of the ZNR. [24] Finally, the Au nanoislands were functionalized on the ZNT (AuNI-ZNT) via deposition of Au thin film and subsequent thermal dewetting.…”

Section: Fabrication and Characterization Of The Auni-zntsmentioning

confidence: 99%

Photothermal Structural Dynamics of Au Nanofurnace for In Situ Enhancement in Desorption and Ionization

Kim

Yun

Noh

et al. 2021

Small

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/smll.202103745. in the AuNI-ZNT hybrid, which modulates the overall band structure and thereby promotes the ionization process. Ultimately, high LDI-MS performance is demonstrated by analyzing small metabolites of fatty acids and monosaccharides, which are challenged to be detected in conventional LDI-MS. This study emphasizing the understanding of matrix properties can provide insights into the design and development of a novel nanomaterial as an efficient LDI matrix. Furthermore, the developed hybrid matrix can overcome the major hurdles existing in conventional LDI-MS.

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“…[10,28,29,32] ZnO nanoarray has attracted great attention in recent years due to the excellent piezoelectric performance. [33][34][35][36][37][38] When ZnO nanorods are aligned in the c-axis of the ZnO crystalline structure, the total electrical energy generation will be significantly increased because the electrical generation from each nanorod are added up. [39] However, despite the current technologies in developing energy harvesters using ZnO nanoarrays, three major hurdles remain that prevent ZnO nanoarray from being widely used in building flexible energy harvester.…”

Section: Introductionmentioning

confidence: 99%

Skin‐like Elastomer Embedded Zinc Oxide Nanoarrays for Biomechanical Energy Harvesting

Jin

Dong

Xü

et al. 2021

Adv Materials Inter

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mechanical energy from those motions to electrical energy to power the portable electronics or as a sensor to monitor vital physiological signals such as the heart rate and blood pressure. The latter is designed to be implanted inside the body usually via a thoracotomy surgery such as a cardiac pacemaker. [12] An example is the implantable cardiac energy harvester that can convert the heart beating motion into electrical energy to power a pacemaker. [13][14][15][16][17][18][19][20] Since these devices directly contact human skins or organs, they need to be highly flexible, deformable, and biocompatible.Thanks to the recent advances in energy harvesting (EH) materials, researchers have developed many sustainable energy strategies for those wearable and implantable cardiac devices, one of the most prominent is the piezoelectric energy nanogenerator (PENG). [6] PENG is built on piezoelectric materials which exhibit piezoelectric effect, that is, the material will generate electricity when subject to mechanical stress or strain due to electric polarization in the material. [21] Piezoelectricity exists in many different materials, including ceramics, single crystals, and polymers. Piezoelectric ceramics such as ZnO, BaTiO 3 (BTO), Pb(Zr x Ti 1-x )-O 3 (PZT), have high piezoelectric coefficient, but they are considered too rigid and fragile for use in wearable or implantable devices, and slight stretching can lead to material failure.

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In-situ stretching strain-driven high piezoelectricity and enhanced electromechanical energy-harvesting performance of a ZnO nanorod-array structure

Cited by 45 publications

References 36 publications

Enhancing the piezoelectric modulus of wurtzite AlN by ion beam strain engineering

Enhancing the piezoelectric modulus of wurtzite AlN by ion beam strain engineering

Photothermal Structural Dynamics of Au Nanofurnace for In Situ Enhancement in Desorption and Ionization

Skin‐like Elastomer Embedded Zinc Oxide Nanoarrays for Biomechanical Energy Harvesting

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