Preparation of monodispersed colloidal particles

Sugimoto, Tadao

doi:10.1016/0001-8686(87)80009-x

Cited by 890 publications

(710 citation statements)

References 122 publications

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“…Finally, the condition of monomer supersaturation can be maintained for rather long periods of time since the precursor particles release new monomer as long as their particle size is smaller than the critical particle radius under the given reaction conditions. Growth conditions where new monomer is constantly produced at high rate, however, result in strong focussing of the particle size distribution, as has been shown theoretically [59,60].…”

Section: Introductionmentioning

confidence: 90%

Synthesis of β-Phase NaYF₄:Yb,Er Upconversion Nanocrystals and Nanorods by Hot-Injection of Small Particles of the α-Phase

Nordmann

Voss

Komban³

et al. 2014

Zeitschrift Für Physikalische Chemie

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-NaYF 4 :Yb,Er upconversion nanocrystals are synthesized by a hotinjection method employing purified -NaYF 4 :Yb,Er particles with a size of approximately 2-3 nm as single-source precursor. The method allows to prepare either spherical nanoparticles with different sizes or nanorods by simply controlling the addition rate of the solution of -phase particles and performing the synthesis either in the absence or in the presence of seed particles. The luminescence properties of the different particles are compared also including core-shell particles.

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Section: Introductionmentioning

confidence: 90%

Synthesis of β-Phase NaYF₄:Yb,Er Upconversion Nanocrystals and Nanorods by Hot-Injection of Small Particles of the α-Phase

Nordmann

Voss

Komban³

et al. 2014

Zeitschrift Für Physikalische Chemie

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“…Upon closer evaluation of the CSD in Figure 3 it can be seen the seed material to exhibit a modest bimodal pattern that incorporates a sub-micron size fraction. The frequency of this fraction decreases with time of crystal growth due to apparent ripening arising from size-dependent solubility [56,57]. The origin of the reduced frequency of crystals in the 1-10 microns range is less clear.…”

Section: Figure 7: Correlation Between the Reduction Of Particle Sizementioning

confidence: 99%

The crystal growth kinetics of alpha calcium sulfate hemihydrate in concentrated CaCl2–HCl solutions

Feldmann

Demopoulos²

2012

Journal of Crystal Growth

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The crystal growth kinetics of calcium sulfate α-hemihydrate (α-HH) in nearly constant supersaturated HCl-CaCl 2 solutions were investigated. Two types of solutions were used, the first had a low HCl (1.4 mol/L) and high CaCl 2 (2.8 mol/L) concentration and the second had a high HCl (5.6 mol/L) and low CaCl 2 (0.7 mol/L) concentration. These conditions were chosen to represent the first and last stage of a newly developed stage-wise HCl regeneration process. The seeded growth experiments were carried out in a stirred, temperature controlled semi-batch reactor in which supersaturation was kept constant by simultaneous addition of CaCl 2 and Na 2 SO 4 solutions. The influence of the following parameters on α-HH crystal growth was studied: temperature (70-95°C), specific power input of stirring (0.02-1.29 W/kg) and equimolar inflow rate of CaCl 2 and Na 2 SO 4 (0-0.6 mol/h). The crystal growth rate was derived from particle size distribution measurements made with the laser light diffraction technique. It was found that the surface area normalized crystal growth rate increased linearly with the molar inflow rate up to 0.3 mol/h, at higher inflow rates no further increase of the growth rate was observed. Temperature and specific power input, within the investigated ranges, did not show a marked effect on the growth rate, attributable to a diffusion/adsorption controlled growth process. An interesting finding of the present research is the establishment of a positive relationship between the narrowing of the width of the particle size distribution with increasing crystal growth rate. The results show that the resulting particle size distribution is positively related to the reagent inflow rate, a finding that can be applied to the industrial design and scale-up of the α-HH crystallization/HCl regeneration process.

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“…These include gas-phase techniques such as gasevaporation, laser vaporization, and laser pyrolysis [40][41][42][43][44]; vacuum synthesis techniques like sputtering, laser ablation, and ionized beam deposition [45][46][47][48]; and liquid phase techniques like precipitation from homogeneous solutions, sol-gel processing, freeze drying [49][50][51][52][53], etc. This article focuses on the use of the aqueous cores of water-in-oil microemulsions as reactors for the synthesis of nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Preparation of nanoparticles of silver halides, superconductors and magnetic materials using water-in-oil microemulsions as nano-reactors

Pillai

Kumar

Hou

et al. 1995

Advances in Colloid and Interface Science

250

121

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Preparation of monodispersed colloidal particles

Cited by 890 publications

References 122 publications

Synthesis of β-Phase NaYF₄:Yb,Er Upconversion Nanocrystals and Nanorods by Hot-Injection of Small Particles of the α-Phase

Synthesis of β-Phase NaYF₄:Yb,Er Upconversion Nanocrystals and Nanorods by Hot-Injection of Small Particles of the α-Phase

The crystal growth kinetics of alpha calcium sulfate hemihydrate in concentrated CaCl2–HCl solutions

Preparation of nanoparticles of silver halides, superconductors and magnetic materials using water-in-oil microemulsions as nano-reactors

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Preparation of monodispersed colloidal particles

Cited by 890 publications

References 122 publications

Synthesis of β-Phase NaYF4:Yb,Er Upconversion Nanocrystals and Nanorods by Hot-Injection of Small Particles of the α-Phase

Synthesis of β-Phase NaYF4:Yb,Er Upconversion Nanocrystals and Nanorods by Hot-Injection of Small Particles of the α-Phase

The crystal growth kinetics of alpha calcium sulfate hemihydrate in concentrated CaCl2–HCl solutions

Preparation of nanoparticles of silver halides, superconductors and magnetic materials using water-in-oil microemulsions as nano-reactors

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Synthesis of β-Phase NaYF₄:Yb,Er Upconversion Nanocrystals and Nanorods by Hot-Injection of Small Particles of the α-Phase

Synthesis of β-Phase NaYF₄:Yb,Er Upconversion Nanocrystals and Nanorods by Hot-Injection of Small Particles of the α-Phase