Ostwald Ripening in Rarefied Systems

Burlakov, V. M.

doi:10.1103/physrevlett.97.155703

Cited by 21 publications

(20 citation statements)

References 25 publications

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“…It happens because small metastable clusters dissolve and created ions are catalytically reduced on other cluster surface. On the other hand, fast reduction results in fast nucleation, and there is no time for Ostwald ripening [51][52][53][54] as it can be observed in case of sodium borohydride [55] or dimethylamino borane [56]. In our case, with increasing initial reductant concentration, the shape of obtained particles is becoming different from spherical.…”

Section: Resultsmentioning

confidence: 55%

Linking the Gold Nanoparticles Formation Kinetics with Their Morphology

Luty–Błocho

Wojnicki

Grzonka

et al. 2018

Int J of Chemical Kinetics

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In this paper, we show that using different concentrations of reagents, it is possible to produce gold nanoparticles with different morphology (size, shape). The color of obtained colloidal gold change from pink, violet to blue, and it corresponds to the shape change. The pink color corresponds to spherical nanoparticles and the blue one to a star shape. The mixture of those two types of nanoparticles result in a violet tone. It was also shown that kinetics of nucleation and growth process is controlled by the reaction on the gold atoms surface, i.e., comproportionation of Au(III) and Au(0) to Au(I), which can be inhibited by varying precursor and reductant concentration.

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Section: Resultsmentioning

confidence: 55%

Linking the Gold Nanoparticles Formation Kinetics with Their Morphology

Luty–Błocho

Wojnicki

Grzonka

et al. 2018

Int J of Chemical Kinetics

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“…The linear growth is attributed to the preferential adsorption of acetate anions to special crystal facets, which directs the growth of the nanoparticles into nanorods by controlling the growth rates along different crystal axes [22,23]. The smaller nanoparticles vanish at the site of the nanorods through an "Ostwald ripening" process [24][25][26] resulting in the final formation of Cd 2 Ge 2 O 6 nanowires with the increase of the reaction time.…”

Section: Resultsmentioning

confidence: 99%

Cd₂Ge₂O₆ nanowires grown by a simple hydrothermal route

Pei¹,

Yang²,

Pei³

et al. 2011

Cryst. Res. Technol.

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Cd 2 Ge 2 O 6 nanowires have been synthesized by a simple hydrothermal route in the absence of any surfactants. The diameter and length of the Cd 2 Ge 2 O 6 nanowires with flat tips are 30-300 nm and several dozens of micrometers, respectivley. X-ray diffraction and high-resolution transmission electron microscopy results show that the nanowires are composed of monoclinic Cd 2 Ge 2 O 6 phase. The growth condition dependence results show that the formation of the Cd 2 Ge 2 O 6 nanowires undergoes three morphological changes from spherical particles to nanorods, and finally to nanowires. The photoluminescence spectrum of the Cd 2 Ge 2 O 6 nanowires exhibits three fluorescence emission peaks centered at 422 nm, 490 nm and 528 nm showing the potential application for optical devices.

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“…, and θ = 0, 1 corresponding to interface-and diffusion-limited growth, respectively. (The case θ = −1 with linear growth is special [25] and will not be discussed here.) Furthermore, let us redefine the "time" to have the growth law as…”

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Early stages of Ostwald ripening

Shneidman

2013

Phys. Rev. E

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The Becker-Döring (BD) nucleation equation is known to predict a narrow double-exponential front (DEF) in the distribution of growing particles over sizes, which is due to early transient effects. When mass conservation is included, nucleation is eventually exhausted while independent growth is replaced by ripening. Despite the enormous difference in the associated time scales, and the resulting demand on numerics, within the generalized BD model the early DEF is shown to be crucial for the selection of the unique self-similar Lifshitz-Slyozov-Wagner asymptotic regime. Being preserved till the latest stages of growth, the DEF provides a universal part of the initial conditions for the ripening problem, regardless of the mass exchange mechanism between the nucleus and the matrix.

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Ostwald Ripening in Rarefied Systems

Cited by 21 publications

References 25 publications

Linking the Gold Nanoparticles Formation Kinetics with Their Morphology

Linking the Gold Nanoparticles Formation Kinetics with Their Morphology

Cd₂Ge₂O₆ nanowires grown by a simple hydrothermal route

Early stages of Ostwald ripening

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Ostwald Ripening in Rarefied Systems

Cited by 21 publications

References 25 publications

Linking the Gold Nanoparticles Formation Kinetics with Their Morphology

Linking the Gold Nanoparticles Formation Kinetics with Their Morphology

Cd2Ge2O6 nanowires grown by a simple hydrothermal route

Early stages of Ostwald ripening

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Cd₂Ge₂O₆ nanowires grown by a simple hydrothermal route