CdS Nanocrystals from a Quaternary Water-in-Oil Microemulsion: Preparation and Characterization of Self-Assembled Layers

Curri, M. Lucia; Alvisi, Marco; Agostiano, Angela; Monica, M. Della; Vasanelli, L.

doi:10.1006/jcis.2001.7835

Cited by 13 publications

(5 citation statements)

References 25 publications

(26 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If the particles consist of homogeneous crystallites with a spherical shape, the geometrical considerations show that the ratio of the particle diameter (D) and the related coherence length (L) is 4/3. 32) We analyzed XRD spectra using the mixed nanoparticles of several batch synthesized in the same conditions, because a very small number of nanoparticles were synthesized under the synthetic reaction of one batch. In order to estimate the nanoparticle diameters by Scherrer's method, we linearized the XRD patterns of a number of scattering peaks due to the finite size of the nanoparticles and determined the width at the midpoint of the linearized XRD peaks.…”

Section: Resultsmentioning

confidence: 99%

Characterization and Photoluminescence of CdS Nanoparticles Synthesized in Diethyl Ether–Sodium Dioctylsulfosuccinate–Water Microemulsion System

Park

Kang

et al. 2007

jjap

View full text Add to dashboard Cite

Spherical cadmium sulfide (CdS) nanoparticles, 4 -5 nm in diameter, were synthesized using an aqueous cadmium nitride [Cd(NO 3 ) 2 . 4H 2 O] and sodium sulfide [Na 2 S . 9H 2 O] solution in a microemulsion system. The effects of the water to surfactant molar ratio (W = [water]/[surfactant]), the concentration of precursors, the Cd to S precursor ratio, and the density of the ultrasonic wave on the properties of the CdS nanoparticles were examined. The luminescent properties and the size effect of the nanoparticles were characterized using UV-vis absorption and photoluminescence (PL) spectra. The PL emission intensity did not change significantly with an increase in precursor and surfactant concentrations. The absorption edge and PL peak energy of the CdS nanoparticles shifted to shorter wavelengths with an increase in cadmium nitride concentration owing to a phase change and a decrease in CdS nanoparticle size.

show abstract

Section: Resultsmentioning

confidence: 99%

Characterization and Photoluminescence of CdS Nanoparticles Synthesized in Diethyl Ether–Sodium Dioctylsulfosuccinate–Water Microemulsion System

Park

Kang

et al. 2007

jjap

View full text Add to dashboard Cite

show abstract

“…A heterogeneous environment combines a medium that is a good solvent and one that is a poor solvent, and the interface between the media acts as a barrier to solutes to control the diffusion of molecules. Heterogeneous environments are known to inside of micelles formed by surfactants, − emulsions, − and ionic liquids. − Supramolecules, such as cyclodextrin, can also trap molecules because of the difference in amphiphilicity between the outside and inside of the molecule . A heterogeneous environment can be used as a diffusion restriction field to promote reactions and switch functions.…”

Section: Introductionmentioning

confidence: 99%

Reversible Change between Excimer and Monomer Forms of Perylene Induced by Water Absorption and Dehydration of Poly-N-isopropylacrylamide Gel

et al. 2021

View full text Add to dashboard Cite

Several fluorescence patterns derived from the excimer states of perylene have been reported, but most of these have been obtained from rigid forms such as crystals or for perylene embedded in hard polymers. We observed perylene excimer emission on absorption of water by a poly-N-isopropylacrylamide gel containing perylene molecules, which were not fixed to the gel framework by chemical bonding. We propose that this emission arises because the hydrophobic perylene molecules cannot dissolve in water and form aggregates. The perylene aggregation was quickly lost on dehydration of the gel, and the luminescence reverted to that of the monomer. In a dehydrated environment, perylene was rapidly dispersed in the gel network. In other words, solid–liquid phase separation of perylene was induced by uptake of water into the gel, and perylene dissolved in the gel on dehydration. Because the outside of the gel is always in an aqueous environment, perylene will remain semipermanently in the gel. Therefore, monomer emission and excimer emission can be switched reversibly and repeatedly.

show abstract

“…Nanoemulsion has been considered to be an ideal nano-reactor for preparation of nanoparticles, such as GeO 2 [10] and CdS [11]. In our previous studies, the composition and stability of W/O nanoemulsions with Triton X-100 as surfactant, nhexanol as co-surfactant, cyclohexane as the oil phase, and water or salt (Na 2 SO 4 or BaCl 2 ) solution as the aqueous phase was investigated [12], and the system was used to prepare BaSO 4 nanoparticles [13].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of diuretic furosemide onto chitosan nanoparticles prepared with a water-in-oil nanoemulsion system

Zhi

Wang

Luo

2005

Reactive and Functional Polymers

View full text Add to dashboard Cite

CdS Nanocrystals from a Quaternary Water-in-Oil Microemulsion: Preparation and Characterization of Self-Assembled Layers

Cited by 13 publications

References 25 publications

Characterization and Photoluminescence of CdS Nanoparticles Synthesized in Diethyl Ether–Sodium Dioctylsulfosuccinate–Water Microemulsion System

Characterization and Photoluminescence of CdS Nanoparticles Synthesized in Diethyl Ether–Sodium Dioctylsulfosuccinate–Water Microemulsion System

Reversible Change between Excimer and Monomer Forms of Perylene Induced by Water Absorption and Dehydration of Poly-N-isopropylacrylamide Gel

Adsorption of diuretic furosemide onto chitosan nanoparticles prepared with a water-in-oil nanoemulsion system

Contact Info

Product

Resources

About