Self-assembly and photoluminescence of CdS-mercaptoacetic clusters with internal structures

Chen, H.M.; Huang, Xinfan; Xu, Ling; Xu, Jun; Chen, K.J.; Ding, Feng

doi:10.1006/spmi.1999.0794

Cited by 57 publications

(30 citation statements)

References 7 publications

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“…The strong broad emission is attributed to carrier recombination due to surface states of CdS nanocrystals formed within the organic matrix. Earlier studies on CdS nanoparticles [25][26][27][28] have also shown the existence of a broad emission in this range, which is attributed to recombination of trapped charge carriers at surface defects. The shoulder at ϳ430 nm is attributed to the excitonic emission of CdS nanocrystals.…”

Section: -3mentioning

confidence: 72%

Orange-red luminescence from Cu doped CdS nanophosphor prepared using mixed Langmuir–Blodgett multilayers

Mandal

Talwar

Major

et al. 2008

The Journal of Chemical Physics

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Cu doped CdS nanophosphors were fabricated through Langmuir-Blodgett route for the first time. Precursors mixed Langmuir-Blodgett multilayers of cadmium arachidate-copper arachidate were used to grow doped sulfide nanoparticles within the organic matrix through postdeposition treatment with H 2 S gas. Changes in composition and layered structure of precursor multilayers were studied using Fourier transform infrared and x-ray reflection. Uptake of Cu in the multilayers was analyzed by inductively coupled plasma atomic emission spectroscopy measurements. Unannealed H 2 S exposed multilayers containing CdS nanoparticles show strong surface state emission centered at ϳ570 nm, whereas Cu doped CdS nanoparticles show orange-red luminescence. Photoluminescence ͑PL͒ spectra of annealed-Cu doped CdS nanoparticles show distinct Cu-related emission compared to annealed-undoped CdS nanoparticles. Power dependent PL measurements of annealed samples show that an efficient carrier recombination takes place at T 2 level of Cu ++ . The carrier relaxation from the excitonic states to T 2 level results in the strong orange-red luminescence.

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Section: -3mentioning

confidence: 72%

Orange-red luminescence from Cu doped CdS nanophosphor prepared using mixed Langmuir–Blodgett multilayers

Mandal

Talwar

Major

et al. 2008

The Journal of Chemical Physics

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“…After the first H 2 S exposure (step-1), LB multilayers exhibit a broad hump extending from 390 to 430 nm and a strong white luminescence centred at $550 nm. The strong white luminescence is attributed to radiative recombination from the trap/ surface states arising from the imperfection of nanocrystals' surface [27,28]. The broad hump is attributed to the overlapping of quartz emission ($390 nm) and the excitonic emission [29] of CdS nanocrystals.…”

Section: Resultsmentioning

confidence: 96%

CdS/ZnS core–shell nanoparticles in arachidic acid LB films

Mandal

Srinivasa

Talwar

et al. 2008

Applied Surface Science

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“…For purification of CdS QDs, the colloid was dialyzed with 0.01 M NaOH solution for 2 days. A membrane with a molecular weight of cutoff 7000 was used for the purification of CdS QDs ) Chen et al, 2000(.…”

Section: Preparation Of Tga-capped Cds Qds Nanoparticlesmentioning

confidence: 99%

Sensitive Determination of Cetirizine Using CdS Quantum dots as Oxidase Mimic-mediated Chemiluminescence of Sulfite

et al. 2016

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A new chemiluminescence (CL) method using cadmium sulfide quantum dots (QDs) as sensitizers is proposed for the chemiluminometric determination of cetirizine pharmaceutical formulation. CdS QDs were synthesized by using water soluble route. The nanoparticles were structurally and optically characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Ultra Violet-Visible (UVVis) absorption spectroscopy and scanning electron microscopy (SEM). In this study results shows that CdS quantum dots are enhancers of the weak CL emission. Trace amounts of cetirizine improved the sensitize effect of CdS quantum dots yielding a significant chemiluminescence enhancement of the Ce(IV)SO32?CdS QDs system. So, a new CL analysis system was selected for the determination of cetirizine. There is a good linear relationship between the relative chemiluminescence intensity and the concentration of cetirizine in the range of 1×10?9 1×10?6 molL?1 with a correlation coefficient (R2) of 0.9963 at the optimum conditions. The limit of detection (LOD) of this system was found to be 5×10?11 M. This method is simple, sensitive and cost effective, and also is accommodating for pharmaceutical applications.Kouhestany et al., International Current Pharmaceutical Journal, June 2016, 5(7): 59-62

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Self-assembly and photoluminescence of CdS-mercaptoacetic clusters with internal structures

Cited by 57 publications

References 7 publications

Orange-red luminescence from Cu doped CdS nanophosphor prepared using mixed Langmuir–Blodgett multilayers

Orange-red luminescence from Cu doped CdS nanophosphor prepared using mixed Langmuir–Blodgett multilayers

CdS/ZnS core–shell nanoparticles in arachidic acid LB films

Sensitive Determination of Cetirizine Using CdS Quantum dots as Oxidase Mimic-mediated Chemiluminescence of Sulfite

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