A benign hydrothermal synthesis of nanopencils-like zinc oxide nanoflowers

Akhoon, Shabir Ahmad; Rubab, Seemin; Shah, M. A.

doi:10.1007/s40089-014-0130-7

Cited by 15 publications

(7 citation statements)

References 19 publications

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“…63 The diverse properties offered by ZnO are believed to be dependent on the variety of morphologies exhibited by ZnO. 64 The sol-gel method is an attractive process as it offers various advantages like simplicity, high reliability, low processing temperature, good repeatability, less production cost in comparison to other synthesis processes and excellent compositional homogeneity. It also provides effective control of the morphology, optical properties and physical characteristics of the synthesized nanoparticles.…”

Section: Sol-gel Synthesis Of Zno Nanoparticlesmentioning

confidence: 99%

Review—Influence of Processing Parameters to Control Morphology and Optical Properties of Sol-Gel Synthesized ZnO Nanoparticles

Arya

Mahajan

Mahajan³

et al. 2021

ECS J. Solid State Sci. Technol.

217

132

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ZnO has several potential applications into its credit. This review article focuses on the influence of processing parameters involved during the synthesis of ZnO nanoparticles by sol-gel method. During the sol-gel synthesis technique, the processing parameters/experimental conditions can affect the properties of the synthesized material. Processing parameters are the operating conditions that are to be kept under consideration during the synthesis process of nanoparticles so that various properties exhibited by the resulting nanoparticles can be tailored according to the desired applications. Effect of parameters like pH of the sol, additives used (like capping agent, surfactant), the effect of annealing temperature and calcination on the morphology and the optical properties of ZnO nanoparticles prepared via sol-gel technique is analyzed in this study. In this study, we tried to brief the experimental investigations done by various researchers to analyze the influence of processing parameters on ZnO nanoparticles. This study will provide a platform to understand and establish a correlation between the experimental conditions and properties of ZnO nanoparticles prepared through sol-gel route which will be helpful in meeting the desired needs in various application areas.

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Section: Sol-gel Synthesis Of Zno Nanoparticlesmentioning

confidence: 99%

Review—Influence of Processing Parameters to Control Morphology and Optical Properties of Sol-Gel Synthesized ZnO Nanoparticles

Arya

Mahajan

Mahajan³

et al. 2021

ECS J. Solid State Sci. Technol.

217

132

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show abstract

“…ZnO is a group II-VI semiconductor material with characteristic optical, transport and piezoelectric properties [1]. It has a wurtzite structure and a wide band-gap of about 3.4 eV, which makes it suitable for optoelectronic applications at short wavelengths [2][3][4]. It also has a high exciton binding energy of 60 mV at room temperature which has been reported to yield good excitonic emission at ultraviolet spectrum in disordered nanoparticles [5].…”

Section: Introductionmentioning

confidence: 99%

“…It also has a high exciton binding energy of 60 mV at room temperature which has been reported to yield good excitonic emission at ultraviolet spectrum in disordered nanoparticles [5]. Because of its high optical transparency in the visible and excellent electrical properties, especially when doped by aluminium [3], thin films of ZnO and ZnO-based materials have received enormous research attention in applications ranging from electrodes for solar cells and optoelectronic devices; to sensors and piezoelectric transducers, among other applications [1][2][3][4][5][6][7][8][9][10]. They are widely studied as alternative transparent conducting oxide (TCO) to mitigate the high cost of indium tin oxide (ITO) caused by the scarcity of indium.…”

Section: Introductionmentioning

confidence: 99%

Properties of nanostructured ZnO thin films synthesized using a modified aqueous chemical growth method

Apeh

Chime

Agbo

et al. 2019

Mater. Res. Express

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Research and development of nano-sized Zinc Oxide (ZnO) has recently received great attention due to its remarkable properties such as large exciton binding energy of 60 meV, extraordinary photosensitivity, nontoxic nature, wide bandgap and the fact that it is a low cost material with many technological applications. The inherent necessity for stoichiometric ZnO nanostructures suggest that a deposition method where the film stoichiometry is controlled by a chemical reaction is unavoidable. Moreover, it is extremely important, when developing new methods for deposition of ZnO nanostructures to keep the deposition system as simple as possible, maximize throughput, and keep costs at a minimum. Modified aqueous chemical growth method offer such an opportunity. In this work, ZnO nano-petals on microscope glass substrates have been prepared by using a modified aqueous chemical growth method. On the other hand, before utilization of the fabricated ZnO nanostructures by any technique for any technological applications, it is essential to investigate morphological, optical, electrical and structural properties. In this work morphological, optical, electrical and structural properties with respect to change in deposition time have been cross examined using FESEM, UV-Vis spectroscopy, I-V properties by Keithley system and XRD respectively. SEM micrographs have revealed very little changes in the shape, orientations and distribution of ZnO nanopetals formed with change in deposition times. SEM micrographs have also revealed the growth pattern for the prepared ZnO nano-petals which proceeds via a nucleation, and coalescence of ZnO nuclei. XRD analysis have revealed that the synthesized ZnO nano-petals have a hexagonal Wurtzite ZnO structure with peaks at 2θ positions 31.7°, 34.4°, 36.2°, 47.4°, 56.5°and 62.7° belonging to the (100), (002), (101), (102), (110) and (103) planes respectively. UV-Vis spectroscopy has in the same way shown that the synthesized ZnO nano-petals have energy band gaps ranging from 3.46 eV to 3.65 eV. I-V measurements have disclosed that the ZnO nano-petals are conductive. Film resistivity values obtained from the I-V curves showed an exponential increase in resistivity with increased film thickness. Our method of preparation of ZnO nano-petals via a chemical assisted route can serve as benchmark for controlled synthesis of ZnO nanostructures for various technological applications.

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“…12,16 The hydrothermal method has attracted the considerable interest because of its simplicity and low-temperature processing. 9,[20][21][22][23] 26 Among these, ZnO-NR-based UV detectors and optical switches have been the focus of out studies. 27,28 In recent times, many groups have reported the UV detection properties of ZnO thin¯lms and ZnO nanostructures-based devices.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Ag/ZnO Nanorod Schottky Diode-Based Low-Voltage Ultraviolet Photodetector

Singh

Jit

Park

2017

NANO

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Ultraviolet (UV) detection characteristics of Ag Schottky contacts with ZnO nanorods (ZnONRs) grown on Indium Tin Oxide (ITO)-coated glass substrates have been investigated. A lowtemperature hydrothermal method was used for growing ZnO-NRs. Circular contacts of Ag were deposited above the ZnO-NRs/ITO samples using the shadow mask technique. The structural properties of the ZnO-NRs were characterized by using scanning electron microscopy (SEM), atomic force microscope (AFM) and X-ray di®raction (XRD). The results revealed a (0002) crystal orientation and a wurtzite hexagonal structure. The electrical characteristics of the Ag/ ZnO-NR Schottky contacts were studied at forward applied bias over the range 0 V to 1 V, under dark and UV illumination. The dark and photocurrents were 1:29 Â 10 À5 A and 2:16 Â 10 À5 A, respectively, and the contrast ratio (ratio of photocurrent to dark current) was 1.67 at þ1.0 V for these devices. The results show that these devices could be useful for cost-e®ective and low-voltage UV detection applications.

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A benign hydrothermal synthesis of nanopencils-like zinc oxide nanoflowers

Cited by 15 publications

References 19 publications

Review—Influence of Processing Parameters to Control Morphology and Optical Properties of Sol-Gel Synthesized ZnO Nanoparticles

Review—Influence of Processing Parameters to Control Morphology and Optical Properties of Sol-Gel Synthesized ZnO Nanoparticles

Properties of nanostructured ZnO thin films synthesized using a modified aqueous chemical growth method

Characterization of Ag/ZnO Nanorod Schottky Diode-Based Low-Voltage Ultraviolet Photodetector

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