Synthesis, size control, and passivation of CdS nanoparticles in water/AOT/n-heptane microemulsions

Caponetti, Eugenio; Pedone, Lucia; Martino, Delia Chillura; Pantò, Valentina; Liveri, Vincenzo Turco

doi:10.1016/s0928-4931(03)00030-4

Cited by 55 publications

(23 citation statements)

References 22 publications

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“…The small discrepancies with data obtained under similar conditions and reported in Ref. [16] are related to differences in the time at which BEA was added. The mean size agrees with the value obtained by means of UV-vis band analysis; this confirms the validity of the above procedure in determining the mean particle size from the CdS absorption band.…”

Section: Cds Powder Characterizationcontrasting

confidence: 72%

“…It is well known that nanoparticles size can be controlled by varying different parameters, such as reactant and surfactant concentrations and temperature. In a previous work [16], how the water-to-AOT molar ratio affects nanoparticle size was demonstrated.…”

Section: Cds Nanoparticle Synthesismentioning

confidence: 97%

“…From its intersection with the x axis a λ s value of 464 ± 9 nm was achieved. To obtain a relationship between λ s and nanoparticle mean diameters (d), in a previous paper [16] UV-vis spectra and HRTEM measurements were performed with AOTcapped CdS nanoparticles dispersed in n-heptane and synthesized using five water/AOT/n-heptane microemulsions having different water/AOT molar ratios. The empirical relationship obtained was…”

Section: Cds Powder Characterizationmentioning

confidence: 99%

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Synthesis and characterization of CdS nanoparticles embedded in a polymethylmethacrylate matrix

Pedone

Caponetti

Leone

et al. 2005

Journal of Colloid and Interface Science

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CdS nanopowder capped with sodium bis(2-ethylhexyl)sulfosuccinate was synthesized by using water-in-oil microemulsions. The CdS nanoparticles of about 5 nm obtained were embedded in polymethylmethacrylate matrix by a photocuring process. The transparent yellow solid compound was characterized by optical absorption and emission spectroscopy, high-resolution transmission electron microscopy, and energy-dispersive X-ray spectroscopy. The properties of this compound were compared with those of the nanopowder dispersed in heptane and in methylmethacrylate. The results obtained indicate that the nanoparticles are homogeneously dispersed in the matrix and do not change in size during the embedding process. Even if the surface slightly changes its luminescence properties, as a consequence of the different new chemical environment, the final product seems to be suitable for practical applications.

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Section: Cds Powder Characterizationcontrasting

confidence: 72%

Section: Cds Nanoparticle Synthesismentioning

confidence: 97%

Section: Cds Powder Characterizationmentioning

confidence: 99%

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Synthesis and characterization of CdS nanoparticles embedded in a polymethylmethacrylate matrix

Pedone

Caponetti

Leone

et al. 2005

Journal of Colloid and Interface Science

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“…Table I reveals that surface area and particle size depend on the proportion of precursors, pH of the reaction medium, stirring time and speed, concentration of added NaOH and its pH. In order to evaluate the threshold wavelength (λ s ) value, UV-vis spectrum has been analysed according to the following equation [11],…”

Section: Resultsmentioning

confidence: 99%

Optical Properties of ZnO Nanoparticles Synthesised from a Polysaccharide and ZnCl₂

Bindu

Thomas

2017

Acta Phys. Pol. A

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In this article we study the optical properties of ZnO nanoparticles. This paper describes cost effective, high yield, and a facile synthetic method for the synthesis of ZnO nanoparticles from precursors viz. linear polysaccharide, chitosan, and ZnCl2 by a precipitation method. The synthesized ZnO nanoparticles were characterized by surface area, pore size, and UV-visible measurements. The optical band gap and the Urbach energy were also calculated and the optical band gap energy of the synthesized ZnO nanoparticles was found to be 3.26 eV and the nature of the optical transition has been identified as direct allowed.

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“…A number of methods are known to produce nanoparticles which require different reaction mediums (Dé ká ny et al, 1995;Caponetti et al, 2003;Pedone et al, 2005;Shi et al, 2004). Among them the ordered organic matrixes must be mentioned: Langmuir-Blodget films, microemulsions and unilamellar vesicles (Fendler, 1984(Fendler, , 1987Mann et al, 1986;Zhu et al, 1992;Pileni et al, 1992;Korgel & Monbouquette, 2000).…”

Section: Introductionmentioning

confidence: 99%

Vesicles as reactors of nanoparticles: an anomalous small-angle X-ray scattering study of the domains rich in copper ions

2007

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The formation of copper hydroxide and copper oxide particles in the gaps among the stacks of multilamellar vesicles is described, illustrating a new pathway in the preparation of nanometre‐scale particles. The in situ structural characterization of both the solid particles and the vesicles as a reaction medium was performed in the initial and final states of the process by using anomalous small‐angle X‐ray scattering (ASAXS) and freeze‐fracture methods. The ASAXS method provides a description of the particle‐size distribution of the copper nanoparticles, in spite of the fact that they are present in low concentration. This method allows the particle formation and growth to be monitored throughout the whole time range of the synthesis.

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Synthesis, size control, and passivation of CdS nanoparticles in water/AOT/n-heptane microemulsions

Cited by 55 publications

References 22 publications

Synthesis and characterization of CdS nanoparticles embedded in a polymethylmethacrylate matrix

Synthesis and characterization of CdS nanoparticles embedded in a polymethylmethacrylate matrix

Optical Properties of ZnO Nanoparticles Synthesised from a Polysaccharide and ZnCl₂

Vesicles as reactors of nanoparticles: an anomalous small-angle X-ray scattering study of the domains rich in copper ions

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Synthesis, size control, and passivation of CdS nanoparticles in water/AOT/n-heptane microemulsions

Cited by 55 publications

References 22 publications

Synthesis and characterization of CdS nanoparticles embedded in a polymethylmethacrylate matrix

Synthesis and characterization of CdS nanoparticles embedded in a polymethylmethacrylate matrix

Optical Properties of ZnO Nanoparticles Synthesised from a Polysaccharide and ZnCl2

Vesicles as reactors of nanoparticles: an anomalous small-angle X-ray scattering study of the domains rich in copper ions

Contact Info

Product

Resources

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Optical Properties of ZnO Nanoparticles Synthesised from a Polysaccharide and ZnCl₂