Electronic properties of two-dimensional zinc oxide in hexagonal, (4,4)-tetragonal, and (4,8)-tetragonal structures by using Hybrid Functional calculation

Supatutkul, Chumpol; Pramchu, Sittichain; Jaroenjittichai, Atchara Punya; Laosiritaworn, Yongyut

doi:10.1088/1742-6596/901/1/012172

Cited by 22 publications

(23 citation statements)

References 15 publications

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“…In addition to the magnification effect of ZnO grain size, the decrease of bandgap energy value is also influenced by the amorph-shaped morphology layer. The bandgap value of the ZnO thin films in this study was similar to those reported by others work [13]- [15].…”

Section: Resultssupporting

confidence: 91%

Effect of Precursor Concentration and Annealed Substrate Temperature on the Crystal Structure, Electronic and Optical Properties of ZnO thin film

Denny

Trenggono

Wijaya

et al. 2020

J. Pure App. Chem Res

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This study carried out on the effect of precursor concentration and annealed substrate temperature on the crystal structure, electronic and optical properties of ZnO thin film. An aqueous solution of Acid Nitrite was used as precursors and its concentration was varied from 0.1 M to 0.4 M. The ZnO thin film was deposited on the glass substrate by Spray Pyrolysis Deposition and annealed with different temperature from 300 oC to 600 oC. The crystal structure, electronic and optical properties were investigated by Scanning Electron Microscopy (SEM), X-ray diffraction (XRD) and UV-Spectrometer. XRD result showed that all thin films have amorphous hexagonal wurtzite crystalline. Particle sizes ranging from 21.83 to 43.67 nm were calculated through Debye-Scherer Method. It showed that the concentration of the precursor had slightly impact on the particle size. Meanwhile, the increase in particle size with increasing annealed temperature is found to be gradual. The average transparent of all thin film was more than 80%. The bandgap of the ZnO thin films was estimated by Tauc Plot Relation. It showed that the bandgap values were increased with the increasing of precursor concentration due to Burstein-Moss Effect. In addition, the decrease in band gap values was found with increasing annealed temperature. Our results demonstrated that the varying precursor concentration and annealed substrate temperature can enhance the structure, electronic and the optical properties of ZnO thin films.

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Section: Resultssupporting

confidence: 91%

Effect of Precursor Concentration and Annealed Substrate Temperature on the Crystal Structure, Electronic and Optical Properties of ZnO thin film

Denny

Trenggono

Wijaya

et al. 2020

J. Pure App. Chem Res

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“…TEM images confirmed the hexagonal structure of the synthesized ZnO.NPs. This structure implies more ionicity and subsequent enhanced catalytic activity of the NP among the three 2D ZnO.NPs structures 44 . It is well documented that decreasing of particle size increases their functionality as antimicrobial and anticancer agent due to the larger surface-to-volume ratio 45 .…”

Section: Discussionmentioning

confidence: 94%

Green Synthesis of Zinc Oxide Nanoparticles Using Aqueous Extract of Deverra tortuosa and their Cytotoxic Activities

Selim

Azb

Ragab

et al. 2020

Sci Rep

394

138

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in recent years, there is a growing interest towards the green synthesis of metal nanoparticles, particularly from plants; however, yet no published study on the synthesis of Zno.nps using the Deverra tortuosa extract. through this study, zinc oxide nanoparticles (Zno.nps) have been synthesized based on using the environmentally benign extract of the aerial parts of D. tortuosa as a reducing and capping agent. ZnO.NPs synthesis was confirmed using UV-Visible (UV-Vis) spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), X-ray Diffraction (XRD) and High Resolution-Transmission electron Microscope (HR-teM). the qualitative and quantitative analyses of plant extract were done. the potential anticancer activity was in vitro investigated against two cancer cell lines (human colon adenocarcinoma "Caco-2" and human lung adenocarcinoma "A549") compared to their activities on the human lung fibroblast cell line (WI38) using the MTT assay. Both the aqueous extract and ZnO.NPs showed a remarkable selective cytotoxicity against the two examined cancer cell lines. Scientific RepoRtS |(2020) 10:3445 | https://doi.

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“…The corresponding SAED pattern reveals distinct crystallographic structures, namely, hexagonal and square lattice types, and similar atomic orderings have been studied earlier. 44 Elemental mapping (Figure 2c) carried out on a freestanding sheet exhibited conformity of Ag doping in ZnO.…”

Section: ■ Results and Discussionmentioning

confidence: 97%

Freestanding Silver-Doped Zinc Oxide 2D Crystals Synthesized by a Surface Energy-Controlled Hydrothermal Strategy

Pradhan

Bandyopadhyay

Nayak

et al. 2021

ACS Appl. Nano Mater.

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Two-dimensional transition metal oxides (2DTMOs) are in great demand for electronic gadgets and sensing devices due to their flexibility, structural immunity, and economic cost. Silver-doped 2DTMOs have suitable candidature for wavelength-selective photoresistive switching; therefore, band-gap engineering in 2DTMOs via silver doping is crucial. We report our discovery via hydrothermal synthesis of Ag-doped 2D ZnO (AZO) using an equimolar concentration of zinc nitrate (Zn(NO 3 ) 2 •6H 2 O) and silver nitrate (AgNO 3 ) as precursors and hexamethylenetetramine (HMTA) as a reducing agent, which helps to optimize surface energy for 2D crystal growth. Monolayers and a few-layered atomically thin AZO sheets up to 3 μm lateral dimensions are formed, as evidenced from atomic force microscopy line profiling. High-resolution electron imaging suggests the emergence of hexagonal (six-fold), square lattice (four-fold), and numerous other strainmediated crystallographic phases of AZO. X-ray photoelectron spectroscopy demonstrates tunable (up to ∼20%) Ag doping resulting in midgaps opening at 1.8 and 2.8 eV. Apart from the successful demonstration of the synthesis of 2D AZO atomic sheets and their thorough characterizations, unique electronic, optical, optoelectronic, photoluminescence, and ferromagnetic behavior paves the way for future generations of emergent devices and sensors.

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Electronic properties of two-dimensional zinc oxide in hexagonal, (4,4)-tetragonal, and (4,8)-tetragonal structures by using Hybrid Functional calculation

Cited by 22 publications

References 15 publications

Effect of Precursor Concentration and Annealed Substrate Temperature on the Crystal Structure, Electronic and Optical Properties of ZnO thin film

Effect of Precursor Concentration and Annealed Substrate Temperature on the Crystal Structure, Electronic and Optical Properties of ZnO thin film

Green Synthesis of Zinc Oxide Nanoparticles Using Aqueous Extract of Deverra tortuosa and their Cytotoxic Activities

Freestanding Silver-Doped Zinc Oxide 2D Crystals Synthesized by a Surface Energy-Controlled Hydrothermal Strategy

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