Effect of thioglycolic acid on the stability and photoluminescence properties of colloidal solutions of CdTe nanocrystals

Kapush, O.A.; Trishchuk, L.I.; Tomashik, V. N.; Tomashik, Z. F.

doi:10.1134/s0020168514010105

Cited by 10 publications

(10 citation statements)

References 3 publications

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“…The second series. The studies performed in [3] showed that aqueous solutions of CdTe NC obtained by colloidal synthesis are stable only at low concentrations. At concentration higher than critical C CdTe = 5.1 × 10 -3 mol/L toward the aggregative and hence sedimentation stability of CdTe NC colloidal solution is lost.…”

Section: Resultsmentioning

confidence: 99%

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Effect of medium pH on the optical properties of CdTe nanocrystals at colloidal synthesis and postsynthetic treatment

Kapush

Trishchuk

Tomashik

et al. 2016

Russ. J. Inorg. Chem.

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Physicochemical properties of low-dimensional structures based on CdTe obtained by colloidal synthesis method were studied. Effect of thioglycolic, hydroxyethylidenediphosphonic, and ethylenediaminetetraacetic acids as well as L-cysteine and thiourea on the processes of formation of CdTe nanocrystals in aqueous solutions was examined. Medium pH was shown to have a considerable effect on the process of their colloidal synthesis. The features of preparation of concentrated colloidal solutions of CdTe nanocrystals stabilized by thioglycolic acid and further sedimentational precipitation of monodisperse fractions from polydisperse solutions were studied. Optical absorption and photoluminescence spectra of the studied materials immediately after synthesis completion and after postsynthetic treatment were obtained and analyzed.

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Section: Resultsmentioning

confidence: 99%

“…The method of colloidal synthesis allows preparation of CdTe NC with average hydrodynamic radius from 1 to 1000 nm and pronounced photoluminescent (PL) properties [1,3]. The advantage of this method is the possibility to obtain large amount (10 18 -10 20 ) of NC in the course of one synthesis.…”

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confidence: 99%

Effect of medium pH on the optical properties of CdTe nanocrystals at colloidal synthesis and postsynthetic treatment

Kapush

Trishchuk

Tomashik

et al. 2016

Russ. J. Inorg. Chem.

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“…CdTe NCs were synthesized by means of colloidal chemistry, following the protocol described by the part of the authors previously [26]. Briefly, the low-temperature colloidal synthesis has been performed in the reactor of complete mixing in the presence of TGA as a stabilizer.…”

Section: Methodsmentioning

confidence: 99%

Tuning the photoluminescence of CdTe quantum dots by controllable coupling to plasmonic Au nanoparticles

Dzhagan

Kapush

Isaeva

et al. 2022

Phys. Chem. Solid St.

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A controllable variation of the photoluminescence (PL) intensity of semiconductor quantum dots (QDs) via their coupling to plasmonic nanoparticles (NPs) is the potential basis for optoelectronic and sensing applications. In this work, the effect of Au NPs on the PL of colloidal CdTe QDs is investigated in solution and solid films. An PL enhancement for the QDs synthesized in water was observed in case of spectral overlap of the plasmon absorption band of and QD PL band. In case of Au NPs synthesized in dimethyl sulfoxyl the trend is to reduction of the PL intensity. For the reference samples prepared by mixing QDs not with Au NP solutions but with corresponding pure solvent, certain PL enhancement was observed and presumably attributed to reduction of self-absorption or non-radiative interparticle interaction in less concentrated QD solution. However, the contribution of this dilution-related enhancement is expected to be independent of the spectral properties of NPs and QDs. Therefore, the observed in this work different behavior of QD PL in certain combinations of QDs and NPs is attributed to interaction between electronic excitation in the QD and plasmon.

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“…The colloidal NC samples was obtained by deposition of cadmium and tellurium ions in an argon atmosphere in a three-necked heterogeneous semiperiodic reactor in the presence of TGA as stabilizer according to the procedure described previously in [19]. Deionized water, 10…50 % aqueous ethylene glycol solutions or 5…25% aqueous glycerin solutions were used as the dispersion medium.…”

Section: Methodsmentioning

confidence: 99%

“…Therefore, we investigated the change in the optical properties of NCs synthesized in deionized water after their incorporation into the matrix of polyvinyl acetate-acrylate copolymer. Being based on the results of our previous work [19], where we ascertained that the optimal [Cd 2+ ]:[Te 2-] ratio for obtaining fluorescent CdTe NCs is 8:1, NCs with the same nominal composition were also synthesized in this work for investigation of NC/polymer composites. Fig.…”

Section: Colloidal Synthesismentioning

confidence: 99%

Effect of the nature of dispersion medium on the CdTe/TGA nanocrystal formation in colloidal solutions and polymeric membranes

Kapush¹,

Boruk²,

Boruk³

et al. 2020

SPQEO

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In this work, physical and chemical properties of CdTe low-dimensional crystallites obtained by grinding or colloidal synthesis have been investigated. In particular, we have analyzed the photoluminescent characteristics of CdTe nanocrystals stabilized by thioglycolic acid, synthesized by using deionized water and water solutions of ethylene glycol and glycerin of different concentrations as dispersion medium. It has been shown that the stability of colloidal solutions of CdTe nanocrystals depends on the nature of dispersion medium and the stabilizer concentration.

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Effect of thioglycolic acid on the stability and photoluminescence properties of colloidal solutions of CdTe nanocrystals

Cited by 10 publications

References 3 publications

Effect of medium pH on the optical properties of CdTe nanocrystals at colloidal synthesis and postsynthetic treatment

Effect of medium pH on the optical properties of CdTe nanocrystals at colloidal synthesis and postsynthetic treatment

Tuning the photoluminescence of CdTe quantum dots by controllable coupling to plasmonic Au nanoparticles

Effect of the nature of dispersion medium on the CdTe/TGA nanocrystal formation in colloidal solutions and polymeric membranes

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