Photo- and electro-luminescence of cadmium selenide nanocrystals and nanocomposites

Ramrakhiani, Meera; Nogriya, V.

doi:10.1016/j.jlumin.2011.09.046

Cited by 23 publications

(7 citation statements)

References 17 publications

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“…The observed value for DMSO casted PVA film corresponds to earlier reports [12]. Similarly the characteristic reflections for DMAO casted PVK are close to the observations of [13,14]. The slight deviation in results is possibly due to variation in solvent swollen nature of PVK in different organic solvents.…”

Section: Methodssupporting

confidence: 86%

Preliminary Study on Blend Based Mixed Ion- Electron Conductor- (PVA: PVK): CH3COONH4: EC System

Agrawal¹

2014

IJMSA

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An attempt has been made in the present work to develop blend based mixed ion-electron conductor viz. PVA: PVK: CH 3 COONH 4 : EC system. Formation of polymer blend and composite has been evidenced during XRD and IR studies. Ionic conductivity of this system is seen to improve by an order of magnitude at room temperature with optimum at 1.27×10-3 S/cm for 0.4 mole ammonium acetate concentration. Ionic charge transport seems to dominate as reflected from It measurements. Temperature dependent conductivity shows that ionic conduction is controlled by combination of Arrhenius and VTF behavior. AC conductivity behavior is seen to be dictated by Jonscher Power law.

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Section: Methodssupporting

confidence: 86%

Preliminary Study on Blend Based Mixed Ion- Electron Conductor- (PVA: PVK): CH3COONH4: EC System

Agrawal¹

2014

IJMSA

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“…And therefore the intensity of the XRD peak gradually decreases and the width of the peak increases with decreasing crystallite size [6].…”

Section: ¼ Kλ=βcosθmentioning

confidence: 98%

“…CdS nanoparticles or quantum dots are extensively used in solar batteries, cells and various electronic devices. Cadmium nanocrystals are used as fluorophores and biolabelling agents because of their unique character of exhibiting fluorescence [6]. However the use of these quantum dots in biological applications was limited because of tedious synthesis process and use of various toxic chemicals.…”

Section: Introductionmentioning

confidence: 99%

Escherichia coli-based synthesis of cadmium sulfide nanoparticles, characterization, antimicrobial and cytotoxicity studies

Shivashankarappa

Sanjay

2020

Braz J Microbiol

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The present research describes the synthesis of cadmium sulfide (CdS) nanoparticles from Escherichia coli under the influence of bacterial enzyme sulphate reductase and study on their cytotoxicity for applications in cancer therapy. Escherichia coli cells were used to synthesize CdS nanoparticles under different concentrations of cadmium chloride and sodium sulfide. The morphology of the nanoparticles was analysed using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDX) was used for elemental analysis of nanoparticles. Fourier-transform infrared spectroscopy analysis (FTIR) was performed to assess the functional groups of the nanoparticles. Crystalline nature of nanoparticles was assessed using powder X-ray diffraction (XRD). Antibacterial studies of CdS nanoparticles were carried out on foodborne pathogens and cytotoxicity studies were carried out on Mus musculus skin melanoma (B16F10) and human epidermoid carcinoma (A431) cell lines. CdS nanoparticle showed more cytotoxic effect on cancer cells compared with standard 5-aminolevulinic acid (5-ALA). The Escherichia coli-synthesized CdS nanoparticles showed highest zone of inhibition in the ratio 4:1 of cadmium chloride and sodium sulfide on all tested bacterial strains. The nanoparticles were also tested for haemolytic activity on RBC cells, which exhibited lower cytotoxicity than sodium dodecyl sulphate which was used as positive control. The cytotoxicity of CdS nanoparticles assessed on A431 cells showed an inhibition of 81.53% at 100 μM concentration while the cytotoxicity assessed on B16F10 cells showed an inhibition of 75.71% at 200 μM concentration which was much efficient than 5-ALA which showed an inhibition of 31.95% at a concentration against B16F10 cells and 33.45% against A431 cells at a concentration of 1 mM. Cadmium sulfide nanoparticles were thus found to be highly toxic on cancer cells compare with standard anticancerous drug 5-ALA.

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“…In this framework, CdSe nanoparticles show enhanced luminescence, increased oscillator strength and shorter response time, fostering the interest in energy and optoelectronics applications [15]. Cadmium selenide is a good candidate for these purposes as it has good optical characteristics [16][17][18], is used in solar cells [19], light-emitting diodes (LEDs) [20][21][22], laser diodes [23][24][25], photo-and electroluminescent devices [26,27], and fluorescent sensors [28][29][30]. Additionally, CdSe versatile material can also be used in its pure nanocrystalline form [31], or in core-shell combination with other metals [32,33], or even in polymer composites to further improve its chemical-physical properties, such as CdSe/TiO2 [34] or In2Se3/CdSe nanocomposites [35] for energy applications.…”

Section: Introductionmentioning

confidence: 99%

Optimization and Characterization of Electrodeposited Cadmium Selenide on Monocrystalline Silicon

et al. 2022

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In this work, the optimal conditions for the electrodeposition of a CdSe film on n-Si were demonstrated. The structural and optical properties of the bare films and after annealing were studied. In particular, the crystallinity and photoluminescence of the samples were evaluated, and after annealing at 400 °C under a nitrogen atmosphere, a PL increase by almost an order of magnitude was observed. This paper opens the route towards the use of electrochemical deposition as a cost-effective and easy fabrication approach that can be used to integrate other interesting materials in the silicon-manufacturing processes for the realization of optoelectronic devices.

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Photo- and electro-luminescence of cadmium selenide nanocrystals and nanocomposites

Cited by 23 publications

References 17 publications

Preliminary Study on Blend Based Mixed Ion- Electron Conductor- (PVA: PVK): CH3COONH4: EC System

Preliminary Study on Blend Based Mixed Ion- Electron Conductor- (PVA: PVK): CH3COONH4: EC System

Escherichia coli-based synthesis of cadmium sulfide nanoparticles, characterization, antimicrobial and cytotoxicity studies

Optimization and Characterization of Electrodeposited Cadmium Selenide on Monocrystalline Silicon

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