ZnSe based semiconductor core-shell structures: From preparation to application

Sun, Chengcheng; Gu, Yarong; Wen, Weijia; Zhao, Lijuan

doi:10.1016/j.optmat.2018.05.005

Cited by 25 publications

(6 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Modification of these conventional materials to improve their properties has also attracted great interest, using methods such as doping, impregnation, core-shell structures, among others. 12,13 Doping results in defects in the crystalline lattice of the material, which can act as centers to prevent recombination of e À /h + pairs. 14 Use of noble metals such as silver, gold, and copper on the surface of such particles can cause plasmonic effects 15 that result in strong absorption of incident radiation and increase the generation and impede the recombination of e À /h + pairs, enhancing the photocatalytic properties of the material.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Properties of Zinc-Doped CuO Decorated with Silver Obtained by Microwave-Assisted Hydrothermal Method: Statistical Factorial Design

Neto

Oliveira

Paskocimas

et al. 2019

Journal of Elec Materi

View full text Add to dashboard Cite

Zinc-doped CuO powders were obtained by microwave-assisted hydrothermal processing at 140°C for 30 min then decorated with silver by photodeposition and characterized by x-ray diffraction (XRD) analysis, field-scanning electron microscopy (SEM), and ultraviolet-visible (UV-Vis) spectroscopy region for E gap estimation. The photocatalytic activity of the powders was measured using methylene blue dye. To provide further information on the influence of the process variables on the photocatalytic activity, a 2 3 factorial design was carried out with three central points, using the amounts of zinc and silver and the stirring time under UV radiation as variables. The XRD patterns indicated ZnO precipitation when 8% Zn was added. SEM micrographs showed that the CuO had predominantly nanoplate morphology, with loss of the regular aspect of the ends and increased thickness on addition of zinc atoms. The photocatalytic activity results showed that addition of zinc and silver increased the photocatalytic activity of pure CuO. According to the factorial design, the stirring time of the CuO powder in contact with AgNO 3 solution was the most significant variable affecting the photocatalytic properties, with longer time being detrimental due to an increase in the size of the silver nanoparticles.

show abstract

Section: Introductionmentioning

confidence: 99%

Enhanced Photocatalytic Properties of Zinc-Doped CuO Decorated with Silver Obtained by Microwave-Assisted Hydrothermal Method: Statistical Factorial Design

Neto

Oliveira

Paskocimas

et al. 2019

Journal of Elec Materi

View full text Add to dashboard Cite

show abstract

“…ZnSe is a binary semiconductor with direct bandgap (2.7 eV) and has two wellknown allotropes: cubic zinc-blende and the hexagonal wurtzite structure. [11][12][13] In terms of basic optical properties, ZnSe can used in solar cells, protective and antireflection coating, blue laser diodes, light-emitting diodes, photodetector, and sensors. [14][15][16][17][18][19][20][21][22] With the rapid development of lasers, traditional linear optical devices have not been able to meet some specific requirements of high power laser and military fields.…”

Section: Doi: 101002/crat202000177mentioning

confidence: 99%

Influence of Annealing Temperature Modulation on the Structural and Optical Properties of ZnSe Thin Films

Yuan

Liu

et al. 2021

Crystal Research and Technology

View full text Add to dashboard Cite

The research work is devoted to study the influence of annealing temperature on the structural and optical properties of ZnSe thin films. The samples are prepared by a thermal evaporation technique and part of the as-deposited films are annealed. X-ray diffraction patterns and Raman spectra analysis reveal that the ZnSe thin films have cubic zinc-blende crystal structure and the crystallinity increases as the annealing temperature increases. For the linear optical parameters, the absorption edge moves to shorter wavelengths with the increase of annealing temperature. Based on Swanepoel's method, the refractive index, film thickness, absorption coefficient and optical band gap are determined. The values of band gap are found to increase from 2.63 to 2.68 eV as the annealing temperature increases. By performing an open aperture Z-scan technique with femtosecond pulses under 800 nm wavelength, all ZnSe samples show two-photon absorption responses. It is found that the modulation depth and the two-photon absorption coefficient decrease with increasing annealing temperature. Moreover, all samples exhibit better optical limiting responses at higher incident power intensities. These novel properties render this a promising material for traditional optoelectronic devices and optical limiters.

show abstract

“…The bioactivity of synthetic inorganic materials was deeply investigated, with many studies focusing on SiO 2 and TiO 2 [ 11 ] obtained by the sol–gel method because it uses materials that are non-toxic, low cost and well-investigated, but many other inorganic structures, most of them targeting other application fields than biomaterials, are now subjected to the bioactivity assays, such as ZnSe-based materials [ 12 , 13 ]. ZnSe is an intrinsic semiconductor with a direct band gap of ~2.7 eV [ 14 ] used especially in optoelectronic and energy fields [ 15 , 16 ]. In our previous study, micro-spherical ZnSe, TiO 2 -ZnSe and their hybrid complexes with lysozyme were deeply characterized from a morphological, structural and functional point of view [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Antibacterial Activity of ZnSe, ZnSe-TiO2 and TiO2 Particles Tailored by Lysozyme Loading and Visible Light Irradiation

et al. 2023

View full text Add to dashboard Cite

ZnSe, ZnSe-TiO2 microspheres and nanostructured TiO2 obtained by hydrothermal and sol–gel methods were tested against Staphylococcus aureus ATCC 25923 and Micrococcus lysodeikticus ATCC 4698 before and after lysozyme (Lys) loading. Morphological characterization of inorganic matrices and hybrid organic–inorganic complexes were performed by microscopy techniques (SEM, AFM and Dark Field Hyperspectral Microscopy). Light absorption properties of ZnSe, ZnSe-TiO2 and TiO2 powders were assessed by UV–visible spectroscopy and their ability to generate reactive oxygen species (•OH and O2•−) under visible light irradiation was investigated. Antibacterial activity of ZnSe, ZnSe-TiO2, TiO2, Lys/ZnSe, Lys/ZnSe-TiO2 and Lys/TiO2 samples under exposure to visible light irradiation (λ > 420 nm) was tested against Staphylococcus aureus and Micrococcus lysodeikticus and correlated with ROS photogeneration.

show abstract

ZnSe based semiconductor core-shell structures: From preparation to application

Cited by 25 publications

References 34 publications

Enhanced Photocatalytic Properties of Zinc-Doped CuO Decorated with Silver Obtained by Microwave-Assisted Hydrothermal Method: Statistical Factorial Design

Enhanced Photocatalytic Properties of Zinc-Doped CuO Decorated with Silver Obtained by Microwave-Assisted Hydrothermal Method: Statistical Factorial Design

Influence of Annealing Temperature Modulation on the Structural and Optical Properties of ZnSe Thin Films

Antibacterial Activity of ZnSe, ZnSe-TiO2 and TiO2 Particles Tailored by Lysozyme Loading and Visible Light Irradiation

Contact Info

Product

Resources

About