Local Strain Distribution in ZnO Microstructures Visualized with Scanning Nano X‐Ray Diffraction and Impact on Electrical Properties

Jordt, Philipp; Hrkac, Stjepan; Gröttrup, Jorit; Davydok, Anton; Krywka, Christina; Wolff, Niklas; Kienle, Lorenz; Adelung, Rainer; Magnussen, Olaf M.; Murphy, Bridget

doi:10.1002/adem.202100201

Cited by 5 publications

(3 citation statements)

References 61 publications

(86 reference statements)

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“…Moreover, ZnO nanowires and nanorods have not yet been fully explored in magnetoelectric applications, even though they represent the bulk of research around ZnO nanostructures. Until this point, only ZnO microrods were extensively utilized in the study of the interfacial interaction between ZnO and magnetic materials, [61,80,82,83], specifically targeting sensor applications. Thus, a novel application of nanowire/nanorod composites, either in array form or in single nanowire configurations, may provide the means of bridging the performance gap, while also improving upon spatial resolution and sensitivity in sensor applications.…”

Section: Discussionmentioning

confidence: 99%

“…This investigation of strain distribution directly on the interface between ZnO and an MS layer highlights the impact of miniaturization on ME composites and drives the research to pursue further improvement on magnetoelectric performance in the nanoscale. Recent studies aiming to discover ZnO magnetoelectric applications have also utilized the aforementioned nXRD method for investigating local strain distributions at the interface [82,83].…”

Section: Zno Micro-and Nano-rodsmentioning

confidence: 99%

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A Review of Magnetoelectric Composites Based on ZnO Nanostructures

2023

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The recent advancements in magnetoelectric (ME) materials have enabled the development of functional magnetoelectric composites for sensor applications in the medical and engineering sectors, as well as in energy harvesting and material exploration. Magnetoelectric composites rely on the interaction between piezoelectric and magnetoelastic materials by coupling the magnetization-induced strain to the strain-generated potential of the piezoelectric phase. This creates an increased interest around the development of novel piezoelectric materials that not only possess favorable piezoelectric properties but also fulfill specific material criteria such as biocompatibility, bioactivity, ease of fabrication and low cost. ZnO, and its nanostructures, is one such material that has been employed in the magnetoelectric research due to its remarkable piezoelectric, semiconducting and optical properties. Thus, this article provides a comprehensive review of the available literature on magnetoelectric composites based on ZnO micro- and nanostructures, aiming to present a concise reference on the methods, applications and future prospects of ZnO-based ME composites. Specifically, a brief introduction is provided, presenting the current research interests around magnetoelectric composites, followed by a concise mention of the magnetoelectric effect and its key aspects. This is followed by separate sections describing the relevant research on ZnO magnetoelectric composites based on ZnO thin-films, either pure or doped, and nano- and microrods composites, as well as nano composites comprised of ZnO nanoparticles mixed with ferromagnetic nanoparticles. Finally, the future prospects and the extension of ME ZnO research into nanowire and nanorod composites are discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Zno Micro-and Nano-rodsmentioning

confidence: 99%

A Review of Magnetoelectric Composites Based on ZnO Nanostructures

2023

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“…[13][14][15] External stress and crystal quality induce a strong electric response in piezoelectric semiconductors, changing the height of the Schottky barrier and the depletion width. [16,17] By the addition of a magnetostrictive material, the variation of external magnetoelastic stress imposed on the semiconductor material could further tune the conductivity across the Schottky barrier for potential sensor applications.…”

Section: Introductionmentioning

confidence: 99%

Visualizing Intrinsic 3D‐Strain Distribution in Gold Coated ZnO Microstructures by Bragg Coherent X‐Ray Diffraction Imaging and Transmission Electron Microscopy with Respect to Piezotronic Applications

Jordt

Wolff

Hrkac

et al. 2021

Adv Elect Materials

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Novel devices ranging from bio magnetic field sensors to energy harvesting nano machines utilize the piezotronic effect. For optimal function, understanding the interaction of electrical and strain phenomena within the semiconductor crystal is necessary. Here, studies of a model piezotronic system are presented, consisting of a ZnO microrod coated by a thin layer of gold, which forms a Schottky contact with the piezoelectric ZnO material. Coherent X‐ray diffraction imaging (CXDI) and transmission electron microscopy (TEM) are used to visualize the structure and strain distribution, showing that the ZnO microrod exhibits strains of multiple origins in the bulk and at the interface. Strain values of −6 × 10‐4 have been measured by CXDI at the ZnO/Au interface. The origin is shown to be a combination of an interface strain, possibly caused by the Schottky contact formation, and distinct, localized electrical fields inside the crystal which are assigned to electron depletion and screening in a bent ZnO/Au piezotronic rod. These findings will contribute to sensor development and to a better understanding of piezotronic applications.

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Strain Distribution in Au/ZnO Microstructures for bio-magnetic sensing utilizing Scanning X-Ray Nano Diffraction and Coherent X-Ray Diffraction Imaging

Jordt

2023

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Local Strain Distribution in ZnO Microstructures Visualized with Scanning Nano X‐Ray Diffraction and Impact on Electrical Properties

Abstract: The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adem.202100201.

Cited by 5 publications

References 61 publications

A Review of Magnetoelectric Composites Based on ZnO Nanostructures

A Review of Magnetoelectric Composites Based on ZnO Nanostructures

Visualizing Intrinsic 3D‐Strain Distribution in Gold Coated ZnO Microstructures by Bragg Coherent X‐Ray Diffraction Imaging and Transmission Electron Microscopy with Respect to Piezotronic Applications

Strain Distribution in Au/ZnO Microstructures for bio-magnetic sensing utilizing Scanning X-Ray Nano Diffraction and Coherent X-Ray Diffraction Imaging

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