Enhancement effect of CdTe quantum dots–IgG bioconjugates on chemiluminescence of luminol–H2O2 system

Kanwal, Shamsa; Traore, Zoumana Sekou; Zhao, Chunyu

doi:10.1016/j.jlumin.2010.05.004

Cited by 25 publications

(7 citation statements)

References 48 publications

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“…The study of functional nanomaterials has attracted tremendous attention because of their potential applications in microelectronics, catalysis, molecular recognition, and chemical and biological labels [12][13][14][15]. Traditionally, the investigation of CL phenomenon is limited to certain molecular systems with considerably strong CL emission [16].…”

Section: Introductionmentioning

confidence: 99%

A sensitive chemiluminescence method for the determination of cysteine based on silver nanoclusters

Wang

Xiang-nan

et al. 2012

Microchim Acta

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We have developed a sensitive chemiluminescent (CL) assay for cysteine. It is based on the use of watersoluble and fluorescent silver nanoclusters (Ag NCs) which are found to be able to strongly enhance the weak CL signal resulting from the redox reaction between Ce(IV) ion and sulfite ion. This enhancement is inhibited by cysteine under appropriate conditions. Taking advantage of this specific CL inhibition, a novel CL method for the sensitive and selective detection of cysteine was developed. This effect is interpreted in terms of an electronic energy transfer from excited state intermediate sulfur dioxide (originating from the CL reaction between Ce(IV) and sulfite ions) to the Ag-NCs. The latter become electronically excited and thus can act as a new source of emission. The method was applied to the determination of cysteine in the range from 5.0 nM to 1.0 μM, with a detection limit at 2.5 nM (S/N03).

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Section: Introductionmentioning

confidence: 99%

A sensitive chemiluminescence method for the determination of cysteine based on silver nanoclusters

Wang

Xiang-nan

et al. 2012

Microchim Acta

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“…The prepared nanocrystals possessed excellent optical properties and QY above 60 %. It is worth to note, that CdTe nanocrystals were tightly capped by Cd 2+ -GSH at a lower pH value (compared to other thiol ligands, e.g pH 11.2 in the case of MSA (Kanwal et al 2010)), which inhibited the growth of the nanocrystals. With the decrease of pH value, the growth rate slows dramatically.…”

Section: Microwave Irradiation Synthesismentioning

confidence: 97%

“…As usual, these QDs can be functionalized with various thiol ligands such as MPA, MSA (Kanwal et al 2010), TGA, 1-butanethiol, 2-mercaptoethanol (Majumder et al 2010) or GSH (Qian et al 2006). However, thiol ligands can be also used as sulphur source in one-step MW synthesis of QDs.…”

Section: Microwave Irradiation Synthesismentioning

confidence: 99%

Synthesis of Glutathione Coated Quantum Dots

Chomoucká¹,

Drbohlavová²,

Ryvolová³

et al. 2012

State-of-the-Art of Quantum Dot System Fabrications

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“…QDs are monodisperse crystalline semiconductor particles with radius being less than or equal to the bulk-exciton Bohr radius (11,10). QDs participate in a CL reaction in one of the following possible ways: (1) as emitting species which are directly oxidized during the reaction (12)(13)(14)(15)(16)(17); (2) as emitting species, after occurrence of chemiluminescence resonance energy transfer (CRET) (18)(19)(20)(21); (3) or as catalyst of a reaction involving another chemiluminophore (22)(23)(24)(25).…”

Section: Introductionmentioning

confidence: 99%

Determination of naphazoline hydrochloride in biological and pharmaceutical samples by a quantum dot‐assisted chemiluminescence system using response‐surface methodology

Imani-Nabiyyi

Sorouraddin

2014

Luminescence

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A simple and highly sensitive chemiluminescence (CL) method is reported for the determination of naphazoline hydrochloride (NH). It was found that the weak CL from the reaction of luminol and KIO4 in an alkaline medium could be highly amplified by cysteine-capped cadmium telluride quantum dots (QDs) and the enhanced CL was effectively quenched by NH and this finding was utilized as a basis for the determination of NH. The QDs were synthesized in aqueous medium and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), and UV-vis and photoluminescence spectroscopy. A possible mechanism was proposed for the CL system based on radical identification experiments, along with CL spectrum of the system. The experimental parameters were optimized by the reliable response surface methodology (RSM). Under the optimized experimental conditions, the proposed method allowed the determination of NH over the range of 5.0 × 10(-10) -2.0 × 10(-7) mol/L (r(2) = 0.9993, n = 10). The precision (RSD%) of the method, obtained from five replicate determinations of 2.0 and 150 nmol/L NH, was found to be 1.0% and 1.3%, respectively. The method was successfully applied to the determination of NH in pharmaceutical formulations and human urine and serum samples with results corroborated with the aid of those obtained from a standard method.

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Enhancement effect of CdTe quantum dots–IgG bioconjugates on chemiluminescence of luminol–H2O2 system

Cited by 25 publications

References 48 publications

A sensitive chemiluminescence method for the determination of cysteine based on silver nanoclusters

A sensitive chemiluminescence method for the determination of cysteine based on silver nanoclusters

Synthesis of Glutathione Coated Quantum Dots

Determination of naphazoline hydrochloride in biological and pharmaceutical samples by a quantum dot‐assisted chemiluminescence system using response‐surface methodology

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