Displacement of the Sulfur Atom in CdS by Electron Bombardment

Kulp, B. A.; Kelley, R. H.

doi:10.1063/1.1735745

Cited by 164 publications

(20 citation statements)

References 10 publications

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“…Rev. Letters 7, 14 (1961 bears considerable resemblance to Abrikosov's theory 7 of type II superconductors in bulk form, and leads to an equivalent expression for the critical field. Thus it provides a simple model to help in understanding that rather mathematical paper.…”

Section: Introductionmentioning

confidence: 90%

Effect of Fluxoid Quantization on Transitions of Superconducting Films

1963

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Section: Introductionmentioning

confidence: 90%

Effect of Fluxoid Quantization on Transitions of Superconducting Films

1963

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“…32 The green emission of CdS can be explained by recombination of e À (free e À or trapped e À ) from the conduction band or different levels (donor or acceptor) with free holes or holes that are either trapped or captured at different levels of CdS crystals. 33,34 …”

Section: Uv-vis and Photoluminescence Spectroscopymentioning

confidence: 99%

In situ functionalization of self-assembled dendrimer nanofibers with cadmium sulfide quantum dots through simple ionic-substitution

et al. 2016

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Cadmium sulfide quantum dots (CdS-QDs) can be generated along poly(propylene imine) (PPI) dendrimerbased self-assembled nanofibers through a simple approach based on ionic substitution. Supramolecular nanofibers are obtained via self-assembly of cationic PPI dendrimers in aqueous solution containing cadmium acetate. The dissociated asymmetric acetate ions (AcO À ) are the ''glue'' for the self-assembly process. The semiconductive CdS nanoparticles are synthesized at room temperature along the selfassembled nanofibers by the addition of sodium sulphide (Na 2 S) in solution. Molecular dynamics (MD) simulation shows that the higher affinity of SH À ions (from dissociated Na 2 S) for Cd 2+ , compared to that of AcO À , triggers ionic substitution at the interface between the dendrimers. TEM and AFM measurements confirm the self-assembly of the fibers and the formation of CdS quantum dots along the filaments having a final size of B2 nanometers. The obtained absorbance results show the presence of quantum confinement effect. Since these self-assembled fibers can be disassembled by a simple addition of sodium chloride in solution (ionic competition), this work proposes a new facile route to obtain functional materials in a convenient way.

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“…The emission peaks observed at 486 and 489 are known as green emission peaks of CdS. These peaks may occur due to a) combination of free electrons from conduction band with holes captured on an acceptor level, b) recombination of trapped electrons from a donor level with free holes and c) recombination of electrons from a donor level with holes trapped on an acceptor level [32,33].…”

Section: Photoluminescencementioning

confidence: 99%

Optical Properties of ZnO – CdS Nano Composites

Madhu¹

2013

IOSRJEN

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-Over the past few years, more effort has been taken to synthesise various inorganic nanocrystalline materials with different sizes and shapes due to their interesting properties and applications. In the present work we have prepared (ZnO) x (CdS) 1-x nano composites by the solvothermal method using a domestic microwave oven. All the prepared (7 with x = 0.0, 0.2, 0.4, 0.5, 0.6, 0.8 and 1.0) samples were optically characterized by UV-Vis -NIR spectral, photoconductivity and photoluminescence measurements.From the UV-Vis-NIR spectra the band gap energies were calculated. It is found that they were slightly higher than the reported values for the end members in the bulk state. This significant change can be attributed to the quantum confinement of the ZnO and CdS nanoparticles. For mixed nano composites the band gap energy lies between the end members. The absorption band region was also determined from the spectrum. The photo conductivity measurements were made for all the samples and a positive photoconductivity was observed for all the samples. The results indicate that the ZnO-CdS nanocomposites are very photosensitive. Photoluminescence studies carried out exhibit five prominent peaks with different wavelengths. The results are reported.

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Displacement of the Sulfur Atom in CdS by Electron Bombardment

Cited by 164 publications

References 10 publications

Effect of Fluxoid Quantization on Transitions of Superconducting Films

Effect of Fluxoid Quantization on Transitions of Superconducting Films

In situ functionalization of self-assembled dendrimer nanofibers with cadmium sulfide quantum dots through simple ionic-substitution

Optical Properties of ZnO – CdS Nano Composites

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