Enhanced photosensing by Mg-doped ZnO hexagonal rods via a feasible chemical route

Kutwade, Vishnu V.; Gattu, Ketan P.; Dive, Avinash S.; Sonawane, M.; Tonpe, Dipak A.; Sharma, Ramphal

doi:10.1007/s10854-021-05364-0

Cited by 13 publications

(3 citation statements)

References 83 publications

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“…Figure 2a shows XRD patterns of pure ZnO NRs (black line) and CuO NPs sprayed over ZnO NRs (red line) samples. The black line shows diffraction peaks at 2θ = 31.85°, 34.51°, 36.31°, 47.61°, and 62.89°, which correspond to the (100), (002), (101), (102), and (103) planes of hexagonal ZnO, similar to data from JCPDS-36-1451 and results reported before [ 39 – 40 ]. Additional peaks at 2θ = 35.90° and 39.14° appear in the XRD pattern of CuO NPs/ZnO NRs, while the original peaks of ZnO remain unchanged.…”

Section: Resultssupporting

confidence: 85%

A visible-light photodetector based on heterojunctions between CuO nanoparticles and ZnO nanorods

Giang,

Nguyen,

Ngo

et al. 2023

Beilstein J. Nanotechnol.

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Optoelectronic devices have various applications in medical equipment, sensors, and communication systems. Photodetectors, which convert light into electrical signals, have gained much attention from many research teams. This study describes a low-cost photodetector based on CuO nanoparticles and ZnO nanorods operating in a wide range of light wavelengths (395, 464, 532, and 640 nm). Particularly, under 395 nm excitation, the heterostructure device exhibits high responsivity, photoconductive gain, detectivity, and sensitivity with maximum values of 1.38 A·W−1, 4.33, 2.58 × 1011 Jones, and 1934.5% at a bias of 2 V, respectively. The sensing mechanism of the p–n heterojunction of CuO/ZnO is also explored. Overall, this study indicates that the heterostructure of CuO nanoparticles and ZnO nanorods obtained via a simple and cost-effective synthesis process has great potential for optoelectronic applications.

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Section: Resultssupporting

confidence: 85%

A visible-light photodetector based on heterojunctions between CuO nanoparticles and ZnO nanorods

Giang,

Nguyen,

Ngo

et al. 2023

Beilstein J. Nanotechnol.

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“…Two emission bands were observed in both sample MZ1 and sample MZ3. The emission peaks were observed at 387 nmin the ultraviolet region and 557 nm in the visible region.The strong ultraviolet emission peak at 387 nm originated from the near band edge emission (NBE).This near band edge emission was endorsed to free exciton emission [34].…”

Section: Fig 5 Uv-vis Spectra Of Magnesium Doped Zinc Oxide Nanoparti...mentioning

confidence: 99%

Untitled

2022

JOR

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Depending upon their origin and synthesis methods, nanoparticles possess unique physicochemical, structural and morphological characteristics, which are important in a wide variety of applications concomitant to various fields. In the present work, Magnesium doped zinc oxide nanoparticles with different concentrations (5 atomic % and 10 atomic %) are prepared and the prepared samples are annealed at 200 ⸰ C for 2 h in a muffle furnace. The structure, surface morphology, chemical composition, optical properties and photoluminescence properties were analyzed using standard procedures. The antioxidant potential and cytotoxicity against the breast cancer MDAMB231 cancer cell line of prepared nanoparticles were explored. A simple, economical soft chemical method was used. The XRD analysis confirmed the presence of hexagonal wurtzite phase with a space group P63mc all the prepared samples. The estimated average grain size for the sample MZ2 (18.16 nm) was smaller than the other samples. The SEM micrograph showed that the morphology of the samples were exhibited the rod shape (MZ1, MZ2 and MZ4) and flower shape (MZ3). The purity of the samples was confirmed by EDAX data. The estimated band gap energy of sample MZ1 and sample MZ3 were 3.41e V and 3.38 e V from the UV-vis analysis. The FT-IR spectra of the samples predicted the presence of functional groups for Zn-O and Mg-O bonds. The PL analysis displayed a strong UV emission peak at 387 nm and a green emission peak at 557 nm. The results of the prepared samples prove the potential toxicity against MDAMB231 breast cancer cell line.

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“…Under ambient conditions, MgO has rocksalt (RS) crystal structures, and ZnO has those of wurzite (WZ). With the development of synthesis, RS Mg 1−x Zn x O and WZ Zn 1−x Mg x O have been produced in recent years [4,[19][20][21][22][23][24]. In addition, both controlling the concentration of ZMO and applying external pressure have led to E g engineering.…”

Section: Introductionmentioning

confidence: 99%

Influence of Stress on Electronic and Optical Properties of Rocksalt and Wurtzite MgO–ZnO Nanocomposites with Varying Concentrations of Magnesium and Zinc

et al. 2022

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The structural, electronic and optical properties of stressed MgO–ZnO nanocomposite alloys with concentrations of Zn and Mg varying from 0.125 to 0.875 were studied using ab initio simulations. Two crystal structures are considered for the initial MgO–ZnO alloys: the rocksalt Mg\({_\text{1-x}}\)Zn\({_\text{x}}\)O and wurtzite Zn\({_\text{1-x}}\)Mg\({_\text{x}}\)O phases. For rocksalt Mg\({_\text{1-x}}\)Zn\({_\text{x}}\)O, the optimized structures are stable at pressures below 10 GPa. The larger the Mg concentration and pressure, the wider the \({E_{g}}\) of the rocksalt phase. In contrast, the optimal geometries of wurtzite Zn\({_\text{1-x}}\)Mg\({_\text{x}}\)O reveal a diversity of possibilities, including rocksalt, wurtzite and mixed phases. These effects lead to the fact that the optical properties of wurtzite Zn\({_\text{1-x}}\)Mg\({_\text{x}}\)O not only demonstrate the properties of the wurtzite phase but also indicate the optical features of the rocksalt phase. In addition, mixed phases of Zn\({_\text{1-x}}\)Mg\({_\text{x}}\)O simultaneously provide the characteristics of both wurtzite and rocksalt phases with the same structures in different dielectric matrices.

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Enhanced photosensing by Mg-doped ZnO hexagonal rods via a feasible chemical route

Cited by 13 publications

References 83 publications

A visible-light photodetector based on heterojunctions between CuO nanoparticles and ZnO nanorods

A visible-light photodetector based on heterojunctions between CuO nanoparticles and ZnO nanorods

Untitled

Influence of Stress on Electronic and Optical Properties of Rocksalt and Wurtzite MgO–ZnO Nanocomposites with Varying Concentrations of Magnesium and Zinc

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