Optical and photoluminescent properties of nanomaterials based on cadmium sulfide nanoparticles and polyethylene

Ушаков, Н. М.; Yurkov, G. Yu.; Баранов, Д. А.; Запсис, К. В.; Zhuravleva, Margarita; Кочубей, В. И.; Кособудский, И. Д.; Губин, С. П.

doi:10.1134/s0030400x06080121

Cited by 15 publications

(5 citation statements)

References 25 publications

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“…If we plot the maximum PL intensities against various mass compositions for nanocomposite IIa (see Figure 12a), the results corresponded well with the findings from Ushakov and co-workers (2006) [33] in their work on CdS nanoparticles and polyethylene nanocomposites at different mass percentages (from 0% to 40%). These researchers obtained the photoluminescence spectrum at 20 mass % CdS nanoparticles and found that the CdS nanoparticles suppress the matrix radiation and enhanced the radiation intensity of the nanomaterial.…”

Section: Resultssupporting

confidence: 86%

Thermal and Optical Properties of CdS Nanoparticles in Thermotropic Liquid Crystal Monomers

et al. 2010

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Two new mesogenic monomers, namely 3,3’-dimethoxy-4,4’-di(hydroxyhexoxy)-N-benzylidene-o-Tolidine (Ia) and 4,4’-di(6-hydroxyhexoxy)-N-benzylidene-o-Tolidine (IIa), were reacted with cadmium sulfide (CdS) via an in situ chemical precipitation method in ethanol to produce CdS nanocomposites. A series of different mass compositions of CdS with Ia and IIa ranging from 0.1:1.0 to 1.0:1.0 (w/w) were prepared and characterized using X-ray Diffraction (XRD), Raman spectroscopy, Fourier Transform Infrared Spectroscopy (FT-IR), Transmission Electron Microscopy (TEM), Polarizing Optical Microscopy (POM) and Differential Scanning Calorimetry (DSC), X-ray Photoelectron Spectroscopy (XPS) and Photoluminescence Spectroscopy (PL). XRD showed that the broad peaks are ascribed to the formation of cubic CdS nanoparticles in both Ia and IIa. The average particle size for both nanocomposites was less than 5 nm with a narrower size distribution when compared with pure CdS nanoparticles. The analyses from POM and DSC demonstrated that mass composition from 0.1:1.0 up to 0.5:1.0 of CdS:Ia nanocomposites showed their enantiotropic nematic phase. On the other hand, polarizing optical microscopy (POM) for IIa nanocomposites showed that the liquid crystal property vanished completely when the mass composition was at 0.2:1.0. PL emissions for CdS: Ia or IIa nanocomposites indicated deep trap defects occurred in these both samples. The PL results revealed that addition of CdS to Ia monomers suppressed the photoluminescence intensity of Ia. However, the introduction of CdS to IIa monomers increased the photoluminescence and was at a maximum when the mass composition was 0.3:1.0, then decreased in intensity as more CdS was added. The XPS results also showed that the stoichiometric ratios of S/Cd were close to 1.0:1.0 for both types of nanocomposites for a mass composition of 1.0:1.0 (CdS:matrix).

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Section: Resultssupporting

confidence: 86%

Thermal and Optical Properties of CdS Nanoparticles in Thermotropic Liquid Crystal Monomers

et al. 2010

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“…Photoluminescence is obtained due to the π-π * transition of the benzenoid unit of polyaniline (2). Also this is due to high quantum efficiency of the photoluminescence reported some researcher [5].…”

Section: Results and Discoussionmentioning

confidence: 97%

Characterization and optical properties of polyaniline-MWCNT-ZnS nanocomposites

Goswami

Ghosh

Meikap

2014

AIP Conference Proceedings

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Polyaniline (PANI)-MWCNT-Zinc sulfide (ZnS) nanocomposites have been synthesized at room temperature by in situ polymerization of aniline in presence of MWCNT and negatively charged ZnS nanoparticles. The nanocomposites were characterized using HRTEM, RAMAN, FTIR, UV-VIS absorptions spectroscopy and photoluminescence (PL) spectroscopy. From HRTEM the estimated particle diameter of different nanocomposites are 3.21 nm. PL measurements indicates that the incorporation of ZnS nanoparticles in PANI-MWCNT enhance the PL emission and occurrence of red shift.

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“…In the case of semiconductor nanoparticles, the so called quantum size effect is known to take place [13]. It is also known that the magnetization and magnetic anisotropy of magnetic nanoparticles can be several times higher than those of the corresponding bulk materials.…”

Section: Introductionmentioning

confidence: 99%

“…Such 2D nanostructures represent a multiphase system consist ing of a polymer matrix and such elements as inor ganic nanoparticles of various compositions and shapes. The properties of these nanoobjects can differ substantially from those of the corresponding bulk materials [12,13].…”

Section: Introductionmentioning

confidence: 99%

“…Depending on the filling of a dielectric matrix with inorganic nanoparticles, the properties of such nanocomposites can vary over wide limits and exhibit quantum size effects [13]. In addition, the properties of nanocomposites are likely to depend on the choice of a polymer matrix and the shape, size, and chemical composition of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

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Surface morphology and optical and magnetic properties of polyelectrolyte/magnetite nanoparticles nanofilms

Gorin¹,

Yashchenok²,

Koksharov

et al. 2009

Tech. Phys.

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Abstract-Polyelectrolyte/iron oxide nanoparticles composite nanocoatings are fabricated by polyionic assembly. They are characterized by atomic force microscopy, electron magnetic resonance, ellipsometry, and secondary ion mass spectrometry. The results obtained indicate that the number of magnetite nanoparticle lay ers in a film is related to its refractive index, thickness, and surface roughness. The electron magnetic resonance signal intensity is found to nonlinearly depend on the number of magnetic nanoparticle layers in a film.

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Optical and photoluminescent properties of nanomaterials based on cadmium sulfide nanoparticles and polyethylene

Cited by 15 publications

References 25 publications

Thermal and Optical Properties of CdS Nanoparticles in Thermotropic Liquid Crystal Monomers

Thermal and Optical Properties of CdS Nanoparticles in Thermotropic Liquid Crystal Monomers

Characterization and optical properties of polyaniline-MWCNT-ZnS nanocomposites

Surface morphology and optical and magnetic properties of polyelectrolyte/magnetite nanoparticles nanofilms

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