Hydrothermal growth of vertically aligned ZnO nanorods as potential scintillator materials for radiation detectors

Angub, Maria Cecilia; Vergara, Christopher Jude; Husay, Horace Andrew; Salvador, A.; Empizo, Melvin John F.; Kawano, Kimiko; Minami, Yuki; Shimizu, Toshihiko; Sarukura, Nobuhiko

doi:10.1016/j.jlumin.2018.05.062

Cited by 31 publications

(7 citation statements)

References 61 publications

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“…For the nonannealed one, the diffracting patterns at ~34.45° and ~47.58° were attributed to (002) and (102) planes of the hydrothermal ZnO nanowire with the hexagonal wurtzite structure [ 24 ]. The predominant intensity of (002) plane strongly suggested that ZnO nanowire hydrothermally grew on the substrate surface with the preferential orientation along [0001] direction (c-axis) [ 25 ]. The additional diffraction patterns at ~31.62° and ~37.31° corresponding to (220) and (311) planes of gamma Al 2 O 3 phase were distinctly observed from the annealed ZnO/Al 2 O 3 core-shell nanowire [ 26 , 27 , 28 ].…”

Section: Resultsmentioning

confidence: 99%

Annealed ZnO/Al2O3 Core-Shell Nanowire as a Platform to Capture RNA in Blood Plasma

et al. 2021

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RNA analytical platforms gained extensive attention recently for RNA-based molecular analysis. However, the major challenge for analyzing RNAs is their low concentration in blood plasma samples, hindering the use of RNAs for diagnostics. Platforms that can enrich RNAs are essential to enhance molecular detection. Here, we developed the annealed ZnO/Al2O3 core-shell nanowire device as a platform to capture RNAs. We showed that the annealed ZnO/Al2O3 core-shell nanowire could capture RNAs with high efficiency compared to that of other circulating nucleic acids, including genomic DNA (gDNA) and cell-free DNA (cfDNA). Moreover, the nanowire was considered to be biocompatible with blood plasma samples due to the crystalline structure of the Al2O3 shell which serves as a protective layer to prevent nanowire degradation. Our developed device has the potential to be a platform for RNA-based extraction and detection.

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Section: Resultsmentioning

confidence: 99%

Annealed ZnO/Al2O3 Core-Shell Nanowire as a Platform to Capture RNA in Blood Plasma

et al. 2021

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“…Experimental growth techniques can lead to various shapes and orientations of NRs and are reported in the literature. Most of the research works on growth are focused on vertical growth of ZnO NRs by optimization of growth conditions or by using seed layer to achieve high piezoelectric potential [22]. ZnO NRs growth processes, conducted without optimization tend to develop tilted structures and there are also other possibilities due to changes in growth parameters viz.…”

Section: Types Of Zno Nrs In the Experimental Synthesismentioning

confidence: 99%

Simulation study of ZnO nanorod geometry for the development of high-performance tactile sensors and energy harvesting devices

Ahmed,

Kumar

2024

Phys. Scr.

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ZnO exhibits an excellent piezoelectric response and can transduce mechanical energy into electrical signals by applying pressure. In particular, vertically aligned ZnO nanorods were thought to be of great importance because of their higher value of piezoelectric coefficient along the z-direction. In this study, various geometries of ZnO nanorods are explored and their effect on the strength of piezoelectric output potential is simulated using COMSOL Multiphysics software. The simulation results show that out of many geometries and inclinations of ZnO nanorods, the highest piezoelectric output is demonstrated by the inclined ZnO nanorods due to the application of higher torque force or shear stress in similar applied force. The high torque force or shear stress at 60⁰ orientation and optimized contributions from all the piezoelectric coefficients resulted in a high piezoelectric output potential close to 215 mV which is much higher than the vertically aligned ZnO nanorod which is approximately 25 mV.

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“…In addition, the micro/nanorod scintillator (Figure 2B) enables the emitted photons to be easily guided or coupled to the readout device, effectively reducing the scattering and re-absorption probability of the scintillation signals. Therefore, it could be concluded that micro/nanostructured scintillators make efficient and accurate VUV photodetection with high temporal and spatial resolution (Angub et al, 2018) possible.…”

Section: Zno Scintillators For Ultra-fast Vuv Photodetectionmentioning

confidence: 99%

Vacuum-Ultraviolet Photon Detections

2020

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Vacuum-ultraviolet (VUV) photon detection technology is an effective means for the exploration in the field of space science (monitoring the formation and evolution of solar storms), high-energy physics (dark matter detection), large-scale scientific facility (VUV free electron lasers) and electronic industry (high-resolution lithography). The advancement of this technology mainly depends on the performance optimization of VUV photodetectors. In this review, we introduced the research progress on the typical VUV photodetectors based on scintillator, photomultiplier tube, semiconductor, and gas, with their unique advantages and optimal performance indicators in different applications summarized. In particular, during recent years, thanks to the advances in ultra-wide bandgap semiconductors, economical VUV photodetectors with low power consumption and small size have been encouragingly developed. Finally, we pointed out the remaining challenges for each type of VUV detector, with the aim of maximizing the performance in a variety of applications in the future.

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Hydrothermal growth of vertically aligned ZnO nanorods as potential scintillator materials for radiation detectors

Cited by 31 publications

References 61 publications

Annealed ZnO/Al2O3 Core-Shell Nanowire as a Platform to Capture RNA in Blood Plasma

Annealed ZnO/Al2O3 Core-Shell Nanowire as a Platform to Capture RNA in Blood Plasma

Simulation study of ZnO nanorod geometry for the development of high-performance tactile sensors and energy harvesting devices

Vacuum-Ultraviolet Photon Detections

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