Formation of CdS nanoparticles using starch as capping agent

Rodriguez, P.; Muñoz-Aguirre, Narcizo; Martínez, Ede; González, Gema; Zelaya, O.; Mendoza, José Guzmán

doi:10.1016/j.apsusc.2008.07.032

Cited by 36 publications

(9 citation statements)

References 4 publications

(4 reference statements)

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“…In the XRD patterns of the nanocomposite hydrogel, a number of sharp diffraction maximums appear, confirming the formation of a crystalline mineral phase after treatment of the 10A1M10Cd hydrogel with gaseous hydrogen sulphide. The positions of the diffraction peaks coincide well with the corresponding peaks of CdS crystal with a cubic structure [39,40]. At the same time, an essential broadening of these peaks in XRD pattern of the nanocomposite can be attributed to the formation of CdS crystals of nanometre size.…”

Section: Resultssupporting

confidence: 69%

Synthesis and characteristics of cross-linked polymer hydrogels with embedded CdS nanocrystals

et al. 2021

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Structural combining of polymer hydrogel network with mineral nanoparticles (metals, oxides, salts) is a very promising approach to create new functional materials with the specific properties. In this study, the cross-linked polymer hydrogels with embedded cadmium sulphide nanocrystals have been synthesized via radical copolymerization of acryl amide with acrylic acid or 2-(dimethylamino)ethyl methacrylate and N,N′-methylenebis(acrylamide) as cross-linker in aqueous media in the presence of nanoparticle precursor-cadmium salt, followed by subjecting the hydrogel obtained to gaseous hydrogen sulphide; this provides the in situ formation of CdS nanocrystals in pores of the hydrogel polymeric network. The effect of the Cd 2+ cation concentration on the copolymerization kinetics, as well as on the gel-fraction content has been studied. The formation of CdS nanocrystals with the size of 3-6 nm has been proved by UV-vis spectroscopy and X-Ray diffractometry. Importantly, the nanocrystal size is largely determined by the density of the hydrogel polymer network. The compressive strain of hydrogels with CdS nanoparticles is significantly larger than that for the initial hydrogels containing Cd 2+ cations only, apparently owing to the breaking of ionic and coordination bonds between metal cations and polar functional groups of matrix copolymer, which provide additional cross-linking of the hydrogel matrix. The obtained nanocomposite hydrogels are highly elastic materials characterized by a sufficiently high strength.

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Section: Resultssupporting

confidence: 69%

Synthesis and characteristics of cross-linked polymer hydrogels with embedded CdS nanocrystals

et al. 2021

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“…a shows the emissions of the traps created by stoichiometry‐related defects like the deep electron trap of sulfur vacancies

true({normalV}_{normalS}^{2 -} true)

at 1.65 eV . A second identifiable peak with an energy of 1.75 eV related to the emission after an electron–phonon interaction with the lattice . The peak located at 2.03 eV has been related in previous works as a donor–acceptor pair (DAP) transition between a donor level related to interstitial cadmium

true({normalI}_{Cd}^{2 +} true)

and an undetermined acceptor level.…”

Section: Resultsmentioning

confidence: 70%

Stimulation of the photoluminescent properties of CBD‐CdS thin films achieved by structural modifications resulting from Ag⁺ doping

Flores-Pacheco

Contreras-Rascón

Dı́az-Reyes

et al. 2017

Physica Rapid Research Ltrs

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The present study details the changes in photoluminescence properties stimulated by the structural changes in consequence of doping the II–VI nanocomposite thin‐film semiconductor cadmium sulfide (CdS) with the IB metallic ion Ag+. The synthesis of the matrix and doped semiconductors was performed using low‐temperature chemical bath deposition (CBD). The doping percentage of the CdS matrix was determined by energy‐dispersive X‐ray spectroscopy (EDS) with a value around 3%. The crystallographic study shows a cubic (1 1 1) preferential growth plane for the undoped material. Both X‐ray and HRTEM characterizations show the presence of a polycrystalline structure for the Ag+‐doped sample. Measurements of particle size from HRTEM micrographs confirm quantum confinement with a reduction of the average particle size from 5.46 to 4.12 nm in the doped sample. The photoluminescence study shows intense downshifted emissions in the green range of the visible spectrum. This could be due to the shallow electron traps formed by crystalline defects in the lattice, which are induced by the metallic ion. This study also shows higher‐energy emissions due to the decrease of the particle size below the effective CdS exciton Bohr radius.

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“…Starch molecules which contain anhydrous glucose unit may play an important role for the structural modification of composite nanomaterials [12]. Syntheses of CdS [13], CdSe [14] and ZnSe [15] nanoparticles have been reported using starch as capping agent. But to the best of our knowledge it has not been utilized for the synthesis of ZnS nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of biopolymer protected zinc sulphide nanoparticles

Senapati¹,

Sarkar

2015

Superlattices and Microstructures

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Formation of CdS nanoparticles using starch as capping agent

Cited by 36 publications

References 4 publications

Synthesis and characteristics of cross-linked polymer hydrogels with embedded CdS nanocrystals

Synthesis and characteristics of cross-linked polymer hydrogels with embedded CdS nanocrystals

Stimulation of the photoluminescent properties of CBD‐CdS thin films achieved by structural modifications resulting from Ag⁺ doping

Synthesis and characterization of biopolymer protected zinc sulphide nanoparticles

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Formation of CdS nanoparticles using starch as capping agent

Cited by 36 publications

References 4 publications

Synthesis and characteristics of cross-linked polymer hydrogels with embedded CdS nanocrystals

Synthesis and characteristics of cross-linked polymer hydrogels with embedded CdS nanocrystals

Stimulation of the photoluminescent properties of CBD‐CdS thin films achieved by structural modifications resulting from Ag+ doping

Synthesis and characterization of biopolymer protected zinc sulphide nanoparticles

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Stimulation of the photoluminescent properties of CBD‐CdS thin films achieved by structural modifications resulting from Ag⁺ doping