Surface plasmon resonance in nanostructured Ag incorporated ZnS films

Chalana, S.R.; Ganesan, V.; Pillai, V. P. Mahadevan

doi:10.1063/1.4933075

Cited by 38 publications

(14 citation statements)

References 57 publications

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“…AFM 2D and 3D mages of a 2%, b 4%, c 6%, d 8% and e 10% Zn doped CdS thin films et al[27]. The reduction of the grain size with the increase of Zn dopant in CdS thin films is in good agreement with the XRD results.…”

supporting

confidence: 79%

Structural, surface morphological, optical and thermoelectric properties of sol–gel spin coated Zn doped CdS thin films

2020

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The present work is focussed on Zinc (2, 4, 6, 8 and 10 wt%) doped CdS thin films synthesized by sol-gel spin coating method and deposited on glass substrates. X-ray diffraction patterns of Zn doped CdS thin films exhibit cubic structure. The microstructural properties such as crystallite size, lattice constant, microstrain, dislocation density and stacking fault probability in the films were reported. The surface morphology and topography of the films was studied by using field emission scanning electron microscopy and atomic force microscopy. The incorporation of Zn in CdS and elemental composition of the films has been confirmed with X-ray photoelectron spectroscopy (XPS) and energy dispersive spectroscopy (EDS). Raman spectrum of Zn doped CdS thin films exhibits 1LO and 2LO phonon modes. The optical band gap of CdS thin films increased from 2.63 to 2.73 eV with the increase of Zn dopant from 2 to 10%. Thermoelectric power measurements show negative Seebeck coefficient indicating n-type semiconducting behaviour. The carrier concentration of Zn doped CdS thin films at room temperature are found to be in the range of 10 19-10 20 cm −3 suggesting that the prepared films are degenerate semiconductors. The increase in thermal conductivity of Zn doped CdS thin film is due to the increase in carrier concentration of the films. The lattice thermal conductivity of Zn doped CdS thin films had an inverse temperature dependent and at high temperatures shows the dominance of phonon scattering.

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confidence: 79%

Structural, surface morphological, optical and thermoelectric properties of sol–gel spin coated Zn doped CdS thin films

2020

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“…The presence of more sharp and well-defined Raman bands in the Z150 film compared to the Z120 and Z180 films indicates the enhanced crystalline nature of this film, as revealed in the XRD results. The intense Raman band at ~348 cm -1 can be assigned to the longitudinal optical (LO) phonon [7,8,32,33], and the medium intensity band ~266 cm -1 can be assigned to the transverse optical (TO) phonon [7,8,33]. The Raman bands at approximately 140 cm -1 and 171 cm -1 can be attributed to the disorderactivated, second-order acoustic phonons [7,8,34,35].…”

Section: Fig 1(a)-(d) Xrd Patterns Of the Zns Films Deposited On Quamentioning

confidence: 99%

“…ZnS thin films can be prepared using various techniques, such as sputtering [7][8][9][10][11], metal organic chemical vapor deposition [12], molecular beam epitaxy [13], atomic layer epitaxy [14], sol-gel [15] and pulsed laser deposition [16]. Among these techniques, radio frequency (RF) magnetron sputtering is a relatively simple and costeffective technique for the preparation of ZnS films [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of RF Power on the Structural and Optical Properties of Zinc Sulfide Films

Chalana

Sankararaman

Prabhu

et al. 2017

JOM

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Zinc sulfide (ZnS) films were prepared via a radio frequency (RF) magnetron sputtering technique using different RF powers (100, 120, 150 and 180 W), and the effects of the RF power on the structural and optical properties of the films were studied using X-ray diffraction, micro-Raman spectroscopy, atomic force microscopy, ultraviolet-visible spectroscopy, spectroscopic ellipsometry and laser photoluminescence spectroscopy. It was found that the RF power has an important impact on the predominant phase formation and crystallinity of the ZnS films. The film thickness, refractive index, and film to bulk relative density increase systematically with an increase in the RF power. Among the various RF power values investigated, 150 W was optimal for the growth of highly crystalline ZnS films with a predominance of the cubic phase and enhanced photoluminescence emissions.

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“…Chalana et al . concluded that Ag could cause photocatalytic activity of the ZnS when exposed to visible light due to the surface plasmon resonance (SPR) effect. In another survey, graphene‐based compounds demonstrate high potentials in this respect because of variegated properties such as unique physicochemical, optical and electrical properties .…”

Section: Introductionmentioning

confidence: 99%

“…Sivakumar et al (22) reported the proper performance of synthesized ZnS-Ag nanocomposite as a photocatalyst for the degradation of organic pollutants under visible light irradiation. Chalana et al (23) concluded that Ag could cause photocatalytic activity of the ZnS when exposed to visible light due to the surface plasmon resonance (SPR) effect. In another survey, graphene-based compounds demonstrate high potentials in this respect because of variegated properties such as unique physicochemical, optical and electrical properties (24)(25)(26).…”

Section: Introductionmentioning

confidence: 99%

Ultrasound‐assisted Synthesis of Ag‐ZnS/rGO and its Utilization in Photocatalytic Degradation of Tetracycline Under Visible Light Irradiation

Kameli

Mehrizad

2018

Photochem & Photobiology

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Recent improvements based on heterojunction nanocomposites have opened new possibilities in photocatalysis. In this research, an ultrasound-assisted coprecipitation method was used to fabricate silver, zinc sulfide and reduced graphene oxide (Ag-ZnS/rGO) nanocomposite, and characterization results indicated that 3% Ag-ZnS spherical nanoparticles are successfully embedded in rGO matrix. The potential of the Ag-ZnS/rGO, as a visible light active photocatalyst, was assessed through optimizing degradation of Tetracycline (TC) by response surface methodology. It was found that the photocatalytic degradation of TC increased with an increase in the amount of nanocomposite and irradiation time, whereas it decreased with increasing the initial TC concentration. Under the optimal conditions (10 mg L of TC, 1.25 g L of Ag-ZnS/rGO, at pH = 7, and irradiation duration 110 min), more than 90% of the TC was degraded. The study of the mechanism of the photocatalytic process disclosed that the synergistic role of surface plasmon resonance (SPR) induced by Ag nanoparticles and p-type semiconductor feature of rGO leads to ZnS semiconductor stimulation in the visible light region. Eventually, a pseudo-first order kinetics model was developed based on the proposed mechanism. The obtained results highlight the role of Ag-ZnS/rGO nanophotocatalyst toward degradation of some antibiotics under visible light.

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Surface plasmon resonance in nanostructured Ag incorporated ZnS films

Cited by 38 publications

References 57 publications

Structural, surface morphological, optical and thermoelectric properties of sol–gel spin coated Zn doped CdS thin films

Structural, surface morphological, optical and thermoelectric properties of sol–gel spin coated Zn doped CdS thin films

Effect of RF Power on the Structural and Optical Properties of Zinc Sulfide Films

Ultrasound‐assisted Synthesis of Ag‐ZnS/rGO and its Utilization in Photocatalytic Degradation of Tetracycline Under Visible Light Irradiation

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