Synthesis of histidine-stabilized cadmium sulfide quantum dots: Study of their fluorescence behaviour in the presence of adenine and guanine

Chanu, T. Inakhunbi; Negi, Devendra P.S.

doi:10.1016/j.cplett.2010.03.068

Cited by 29 publications

(20 citation statements)

References 36 publications

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“…BPA could bind to the surface of chitosan-capped ZnS QDs like a cap through the hydrogen-bond interaction between the -OH of BPA and the -NH 2 /-OH of chitosan. 32 The hydrogen bonds lead chitosan molecules to partly peel off from the surface of the ZnS QDs, and then the surface changes induced the uorescence quenching of the ZnS QDs. 21…”

Section: Quenching Mechanismmentioning

confidence: 99%

Facile synthesis of chitosan-capped ZnS quantum dots as an eco-friendly fluorescence sensor for rapid determination of bisphenol A in water and plastic samples

et al. 2014

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Section: Quenching Mechanismmentioning

confidence: 99%

Facile synthesis of chitosan-capped ZnS quantum dots as an eco-friendly fluorescence sensor for rapid determination of bisphenol A in water and plastic samples

et al. 2014

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“…[ 15,16,23 ] In this procedure, the capping agent plays an important role in controlling the stability, shape, and size of the nanoparticles, as well as avoiding their agglomeration. [ 24–26 ] There have recently been several reports on the use of various thio Schiff base ligands as sulfur sources, as well as the capping and reducing agents for synthesis of sulfide nanomaterials, [ 27,28 ] which can be attached directly to metal ions and avoid nanoparticle agglomeration.…”

Section: Introductionmentioning

confidence: 99%

Influence of synthesis parameters on the optical and photocatalytic properties of solvo/hydrothermal CuS and ZnS nanoparticles

et al. 2020

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Copper sulfide and zinc sulfide nanostructures were synthesized using a solvo/hydrothermal method and a thio Schiff base ligand, N‐benzylidene ethanethioamide, as a source of sulfide ions. The effects of different synthesis parameters including the type of solvent, temperature, and duration of reactions on the morphology of the CuS and ZnS products were investigated using field emission scanning microscopy and transmission electron microscopy, respectively. The structural aspects of the samples were characterized using powder X‐ray diffraction, Fourier transform infrared spectroscopy, and energy dispersive X‐ray analysis. The optical properties of the samples were studied through their optical absorption and photoluminescence spectra. The photocatalytic ability of the as‐synthesized sulfides was explored by studying the colour removal of methylene blue under ultraviolet light irradiation.

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“…With an equilibrium dissociation constant ( K d ) of 8.7×10 −13 [22], zinc-histidine complexes can act as nucleation centers for sulfide incorporation and the production of luminescent ZnS and CdS nanocrystals [23, 24]. Typical synthesis schemes require high concentration of histidine (in the 2–30 mM range), alkaline conditions (pH ≥ 9.5) and elevated temperatures (T ≈ 60°C), which can all affect the structural and functional integrity of proteins.…”

Section: Resultsmentioning

confidence: 99%

Biofabrication of ZnS:Mn luminescent nanocrystals using histidine, hexahistidine, and His-tagged proteins: A comparison study

Zhou

Baneyx

2014

Biochemical Engineering Journal

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The ubiquitous hexahistidine purification tag has been used to conjugate proteins to the shell of CdSe:ZnS quantum dots (QDs) due to its affinity for surface-exposed Zn2+ ions but little attention has been paid to the potential of His-tagged proteins for mineralizing luminescent ZnS nanocrystals. Here, we compare the ability of free histidine, a His tag peptide, His-tagged thioredoxin (TrxA, a monomeric protein), and N- and C-terminally His-tagged versions of Hsp31 (a homodimeric protein) to support the synthesis of Mn-doped ZnS nanocrystals from aqueous precursors under mild conditions of pH (8.2) and temperature (37°C). We find that: (1) it is possible to produce poor quality QDs when histidine is used at high (8 mM) concentration; (2) an increase in local histidine concentration through repetition of the amino acid as a His tag decreases the amount of needed reagent ≈10-fold and improves optical properties; (3) fusion of the same His tag to TrxA allows for ZnS:Mn QDs mineralization at micromolar concentrations; and (4) doubling the local hexahistidine concentration by exploiting Hsp31 dimerization further improves nanocrystal luminescence with the brightest particles obtained when His tags are spatially co-localized at the Hsp31 N-termini. Although hexahistidine tracts are not as efficient as combinatorially selected ZnS binding peptides at QD synthesis, it should be possible to use the large number of available His-tagged proteins and the synthesis approach described herein to produce luminescent nanoparticles whose protein shell carries a broad range of functions.

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Synthesis of histidine-stabilized cadmium sulfide quantum dots: Study of their fluorescence behaviour in the presence of adenine and guanine

Cited by 29 publications

References 36 publications

Facile synthesis of chitosan-capped ZnS quantum dots as an eco-friendly fluorescence sensor for rapid determination of bisphenol A in water and plastic samples

Facile synthesis of chitosan-capped ZnS quantum dots as an eco-friendly fluorescence sensor for rapid determination of bisphenol A in water and plastic samples

Influence of synthesis parameters on the optical and photocatalytic properties of solvo/hydrothermal CuS and ZnS nanoparticles

Biofabrication of ZnS:Mn luminescent nanocrystals using histidine, hexahistidine, and His-tagged proteins: A comparison study

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