Effect of CTAB concentration on the properties of ZnO nanoparticles produced by laser ablation method in CTAB solution

Abdi, Soheila; Dorranian, Davoud

doi:10.1016/j.optlastec.2018.07.009

Cited by 26 publications

(10 citation statements)

References 27 publications

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“…Hall measurement revealed that the Ag 2 S had a negative Hall coefficient, indicating that it is an n-type semiconductor. This finding agrees well with [ 39 ]. Fig.…”

Section: Resultssupporting

confidence: 94%

“…On the basis of these results, we suggest that adding a surfactant, such as cationic CTAB, to Tu solutions decreases the number of recombination centers and thus reduces the possibility of carrier recombination [ 39 ]. The obtained responsivity in the visible region for the photodetector prepared with CTAB was higher than that of silicon-based heterojunction photodetectors [ 40 – 44 ].…”

Section: Resultsmentioning

confidence: 99%

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High-responsivity hybrid α-Ag₂S/Si photodetector prepared by pulsed laser ablation in liquid

Ismail¹,

Rawdhan²,

Ahmed³

2020

Beilstein J. Nanotechnol.

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We report the synthesis of α-Ag2S nanoparticles (NPs) by one-step laser ablation of a silver target in aqueous solution of thiourea (Tu, CH4N2S) mixed with cationic cetyltrimethylammonium bromide (CTAB) as surfactant. The effect of the CTAB surfactant on the structural, morphological, optical, and elemental composition of Ag2S NPs was evaluated using X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), and UV–vis spectroscopy. The optical absorption decreased and the optical energy gap of α-Ag2S increased from 1.5 to 2 eV after the CTAB surfactant was added to the Tu solution. XRD studies revealed that the synthesized Ag2S NPs were polycrystalline with a monoclinic structure and that crystallinity of the nanoparticles was improved after adding CTAB. Raman studies revealed the presence of peaks related to Ag–S bonds (Ag modes) and the longitudinal optical phonon 2LO mode. Scanning electron microscopy investigations confirmed the production of monodisperse Ag2S NPs when using the CTAB surfactant. The optoelectronic properties of α-Ag2S/p-Si photodetector, such as current–voltage characteristics and responsivity in the dark and under illumination, were also improved after using the CTAB surfactant. The responsivity of the photodetector increases from 0.64 to 1.85 A/W at 510 nm after adding CTAB. The energy band diagram of the α-Ag2S/p-Si photodetector under illumination was constructed. The fabricated photodetectors exhibited reasonable stability after three weeks of storage under ambient conditions with a responsivity of 70% of the initial value.

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“…Hall measurement revealed that the Ag 2 S had a negative Hall coefficient, indicating that it is an n-type semiconductor. This finding agrees well with [ 39 ]. Fig.…”

Section: Resultssupporting

confidence: 94%

Section: Resultsmentioning

confidence: 99%

High-responsivity hybrid α-Ag₂S/Si photodetector prepared by pulsed laser ablation in liquid

Ismail¹,

Rawdhan²,

Ahmed³

2020

Beilstein J. Nanotechnol.

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“…However, when the concentration of CTAB keeps growing, a decline can be seen in the content of hydrocarbons in the pyrolysis products. It is possible that the hexagonal structure starts to become disordered, and the damage to the microporous structure of HZSM-5 is excessive [32]. When the concentration of CTAB is 10 wt%, the damage to microporous structures of HZSM-5 is weaker, and the MCM-41 structure can be assembled on the surface.…”

Section: Resultsmentioning

confidence: 99%

Research on catalytic pyrolysis of algae based on Py-GC/MS

Zhao

Zhong

et al. 2019

R. Soc. open sci.

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In order to improve the quality of catalysis products of algae, composite molecular sieve catalyst was prepared by digestion and crystallization of HZSM-5 to reduce the oxygen content of the catalytic products. According to the analysis of the pyrolysis products, the best preparation conditions were chosen of tetra propylammonium hydroxide (TPAOH) solution 2.0 mol l−1, cetyltrimethylammonium bromide (CTAB) solution 10 wt%, crystallization temperature 110°C, digestion–crystallization time: 24–24 h. The results indicate that the main function of catalysts is to promote the conversion of alcohols into hydrocarbons by reducing energy barriers. Catalysed by the composite molecular sieve, the content of alcohols in the pyrolysis products decreased from more than 30% to less than 10%, the content of hydrocarbons increased from 20% to nearly 60%, while all the adverse components remained at a low level, which indicates that the catalytic pyrolysis products are of high quality. The great deoxidation effect of composite molecular sieves is not only due to the expansion of the range of organic matter during re-pyrolysis, but also the increasing of the residence time of pyrolysis products inside the structure for the external mesoporous structure.

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“…Furthermore, in order to improve the properties of nanoparticles obtained by PLAL, different kinds of additives, such as surfactants, salts, polymers, biomolecules, and organic solvents, can be applied to tune the NPs' size and modify the NPs' property. For instance, Abdi et al used CTAB as cation surfactant to improve the degree of crystallinity of ZnO nanoparticles [49]. SDS as anion surfactant has often been used to control the size of the particles prepared with laser ablation in water [50].…”

Section: Plal Solutionsmentioning

confidence: 99%

Rare-earths doped-nanoparticles prepared by pulsed laser ablation in liquids

Castaing

Guo

et al. 2020

Ceramics International

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HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.

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Effect of CTAB concentration on the properties of ZnO nanoparticles produced by laser ablation method in CTAB solution

Cited by 26 publications

References 27 publications

High-responsivity hybrid α-Ag₂S/Si photodetector prepared by pulsed laser ablation in liquid

High-responsivity hybrid α-Ag₂S/Si photodetector prepared by pulsed laser ablation in liquid

Research on catalytic pyrolysis of algae based on Py-GC/MS

Rare-earths doped-nanoparticles prepared by pulsed laser ablation in liquids

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Effect of CTAB concentration on the properties of ZnO nanoparticles produced by laser ablation method in CTAB solution

Cited by 26 publications

References 27 publications

High-responsivity hybrid α-Ag2S/Si photodetector prepared by pulsed laser ablation in liquid

High-responsivity hybrid α-Ag2S/Si photodetector prepared by pulsed laser ablation in liquid

Research on catalytic pyrolysis of algae based on Py-GC/MS

Rare-earths doped-nanoparticles prepared by pulsed laser ablation in liquids

Contact Info

Product

Resources

About

High-responsivity hybrid α-Ag₂S/Si photodetector prepared by pulsed laser ablation in liquid

High-responsivity hybrid α-Ag₂S/Si photodetector prepared by pulsed laser ablation in liquid