Characterization of Zinc Oxide (ZnO) piezoelectric properties for Surface Acoustic Wave (SAW) device

Zakaria, Muhammad Razlan; Johari, Shazlina; Ismail, Mohd Hafiz; Hashim, U.

doi:10.1051/epjconf/201716201055

Cited by 13 publications

(4 citation statements)

References 17 publications

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“…Utilizing a sonic or ultrasonic wave indirectly to drive an NG is an ideal choice for powering or facilitating the self-sufficient operation of a nanosystem. Furthermore, applying the ultrasonic waves through liquid media is an effective method to agitate NGs. , The size of NGs was 1 cm × 0.5 cm, which is much smaller than that of the water chamber. As revealed in Figure , the output current result instantly increased when the ultrasonic oscillator machine was opened on and then kept at the maximum value.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Nanogenerator Performances of 1-D Al-Doped ZnO Nanorod Arrays through Ultrasonic Wave Systems

Chu

Young

Chang

et al. 2023

ACS Appl. Electron. Mater.

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One-dimensional (1-D) well-aligned zinc oxide (ZnO) nanorods (NRs) without and with aluminum (Al) dopants were triumphantly grown on conductive indium−tin-oxide glass substrates through a simple chemical bath deposition at low temperature in this study. The designed devices are also called the AZO-0 and AZO-1 samples. After annealing in a vacuum state (10 min, 600 °C), the optical properties of the nanostructures were explored via photoluminescence emission spectroscopy. Field-emission scanning electron microscopy, high-resolution transmission electron microscopy, and an X-ray diffraction spectrometer were used to investigate the surface nanostructures and crystalline properties of the NR arrays. It was seen that all nanostructures clearly showed a single-crystal property with hexagonal wurtzite shape and grew vertically on the substrate. The elemental content of the sample was checked by X-ray photoelectron spectroscopy and an energy-dispersive X-ray spectrometer. Additionally, nanogenerators (NGs) based on the 1-D AZO-0 and AZO-1 nanostructures were also fabricated and investigated. The copper tape was successfully utilized to combine nanostructures and electrodes for the NG device in an ultrasonic oscillator machine with a water chamber. As a result, it was found that the output power values of the AZO-1 NR NGs were higher than that of the AZO-0 NR NGs. The AZO-1 NRs revealed significantly superior conductive performance in NG devices and are promising candidates in future self-powered NG applications.

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Section: Resultsmentioning

confidence: 99%

Enhanced Nanogenerator Performances of 1-D Al-Doped ZnO Nanorod Arrays through Ultrasonic Wave Systems

Chu

Young

Chang

et al. 2023

ACS Appl. Electron. Mater.

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“…It can retain its hexagonal wurtzite structure and can be grown in polycrystalline and epitaxial nature [89], [90]. ZnO can be fabricated on a wide morphological setting [91]- [97], like in piezoelectrical transducers [94], [95]. The piezoelectric activity of ZnO, as well as other intriguing physical features, is owing to its unique crystal structure, which may be classified into three frameworks: rocksalt, zinc blende, and wurtzite.…”

Section: Zno Defects and Their Contributionmentioning

confidence: 99%

“…Furthermore, the coupling of ZnO piezoelectricity and semiconducting capabilities produced the so-called ''piezotronic effect.'' The charge carrier transport properties may be regulated and modified by the inner electric potential made in ZnO [95]. The idea of combining ZnO's unique characteristics with various morphologies has piqued researchers' interest in the material.…”

Section: Zno Defects and Their Contributionmentioning

confidence: 99%

ZnO Based Resistive Random Access Memory Device: A Prospective Multifunctional Next-Generation Memory

et al. 2021

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Numerous works that have demonstrated the study and enhancement of switching properties of ZnO-based RRAM devices are discussed. Several native point defects that have a direct or indirect effect on ZnO are discussed. The use of doping elements, multi-layered structures, suitable bottom and top electrodes, controlling the deposition materials, and the impact of hybrid structure for enhancing the switching dynamics are discussed. The potentials of ZnO-based RRAM for invisible and bendable devices are also covered. ZnO-based RRAM has the potential for possible application in bio-inspired cognitive computational systems. Thus, the synapse capability of ZnO is presented. The sneak-path current issue also besets ZnO-based RRAM crossbar array architecture. Hence, various attempts to subdue the bottleneck have been shown and discussed in this article. Interestingly, ZnO provides not only helpful memory features. However, it demonstrates the ability to be used in nonvolatile multifunctional memory devices. Also, this review covers various issues like the effect of electrodes, interfacial layers, proper switching layers, appropriate fabrication techniques, and proper annealing settings. These may offer a valuable understanding of the study and development of ZnO-based RRAM and should be an avenue for overcoming RRAM challenges.

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“…Piezoelectricity is the conversion of mechanical stress into electrical energy. Piezoelectric materials include non-centrosymmetric crystals that reorient their molecular dipole moments under physical stress (15). Silk holds great potential as a platform for neuromodulation.…”

Section: Emilin Mathew Leya Joykuttymentioning

confidence: 99%

Testing HCN1 channel dysregulation in the prefrontal cortex using a novel piezoelectric silk neuromodulator

Mathew,

Joykutty

2021

J Emerg Invest

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Mental illnesses are prevalent in society, yet patients are widely undiagnosed and mistreated. Within this branch of diseases, schizophrenia is an underrecognized disorder that affects approximately 1% of adult patients that portray behavioral and cognitive impairments. Although no comprehensive characterization of schizophrenia exists, there is a general consensus that patients have electrical dysfunction in the prefrontal cortex. The goal of the first phase of this project was to analyze whether hyperpolarization-activated cyclic nucleotide-gated (HCN) channel expression was increased in a calcium/calmodulin-dependent protein kinase (CAMK2) knockout (KO) mouse model of schizophrenia. Fluorescence analysis of four CAMK2 KO and one wild-type mouse validated that HCN channels were upregulated in the prefrontal cortex of KO mice compared to wild-type, which was demonstrated by high localization in dendrites. Notably, there was a statistical difference between the control and schizophrenic infralimbic regions but not between the control and schizophrenic prelimbic regions, suggesting that electrical dysfunction is localized in the infralimbic prefrontal cortex and future treatments should focus there. In the second phase, we investigated the resynchronization of neuronal firing as a treatment strategy for abnormal electrical firing, which has proven to be effective in other neurological disorders. We designed a novel piezoelectric silk-based implant and optimized electrical output through the addition of conductive materials zinc oxide (ZnO) and aluminum nitride (AlN). Via ultrasound exposure, we determined that the 2 M ZnO-silk composite generated the highest electrical output. With further research and compatibility studies, this implant could rectify electrical misfiring in the infralimbic prefrontal cortex.

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Characterization of Zinc Oxide (ZnO) piezoelectric properties for Surface Acoustic Wave (SAW) device

Cited by 13 publications

References 17 publications

Enhanced Nanogenerator Performances of 1-D Al-Doped ZnO Nanorod Arrays through Ultrasonic Wave Systems

Enhanced Nanogenerator Performances of 1-D Al-Doped ZnO Nanorod Arrays through Ultrasonic Wave Systems

ZnO Based Resistive Random Access Memory Device: A Prospective Multifunctional Next-Generation Memory

Testing HCN1 channel dysregulation in the prefrontal cortex using a novel piezoelectric silk neuromodulator

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