Right- and left-hand microcrystals of kaolinite and their natural abundance

Samotoin, N. D.

doi:10.1134/s1028334x10030281

Cited by 4 publications

(3 citation statements)

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“…A similar suggestion was made by Samotoin [137], who reported diamond morphology of spiral growth with a step height of ∼8 nm. Polycrystalline diamond films were synthesized from a hydrocarbon gas activated by an arc discharge of continuous current.…”

Section: Effect Of the Nanoparticle Size On The Deposition Behavioursupporting

confidence: 83%

Charged nanoparticles in thin film and nanostructure growth by chemical vapour deposition

Hwang¹,

Lee²

2010

J. Phys. D: Appl. Phys.

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The critical role of charged nanoclusters and nanoparticles in the growth of thin films and nanostructures by chemical vapour deposition (CVD) is reviewed. Advanced nanoparticle detection techniques have shown that charged gas-phase nuclei tend to be formed under conventional processing conditions of thin films and nanostructures by thermal, hot-wire and plasma CVD. The relation between gas-phase nuclei and thin film and nanostructure growth has not been clearly understood. In this review it will be shown that many films and nanostructures, which have been believed to grow by individual atoms or molecules, actually grow by the building blocks of such charged nuclei. This new growth mechanism was revealed in an attempt to explain many puzzling phenomena involved in the gas-activated diamond CVD process. Therefore, detailed thermodynamic and kinetic analyses will be made to draw the conclusion that the well-known phenomenon of deposition of less stable diamond with simultaneous etching of stable graphite should be an indication of diamond growth exclusively by charged nuclei formed in the gas phase. A similar logic was applied to the phenomenon of simultaneous deposition and etching of silicon, which also leads to the conclusion that silicon films by CVD should grow mainly by the building blocks of charged nuclei. This new mechanism of crystal growth appears to be general in many CVD and some physical vapour deposition (PVD) processes. In plasma CVD, this new mechanism has already been utilized to open a new field of plasma-aided nanofabrication.

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Section: Effect Of the Nanoparticle Size On The Deposition Behavioursupporting

confidence: 83%

Charged nanoparticles in thin film and nanostructure growth by chemical vapour deposition

Hwang¹,

Lee²

2010

J. Phys. D: Appl. Phys.

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“…However, 'wavy macrosteps' are commonly observed on CVD diamonds. Such wavy macrosteps indicate that the building block of diamonds is of a comparable size to the height of the macrosteps [37,40,41]. Based on the SEM observation of wavy macrosteps on the diamond crystal faces {1 0 0} and {1 1 1}, Samotoin [40,41] suggested that the diamond crystal growth from the hydrocarbon gas phase occurs at the level of clusters rather than atoms or molecules.…”

Section: Nonclassical Crystallization In Diamond Cvdmentioning

confidence: 99%

“…Such wavy macrosteps indicate that the building block of diamonds is of a comparable size to the height of the macrosteps [37,40,41]. Based on the SEM observation of wavy macrosteps on the diamond crystal faces {1 0 0} and {1 1 1}, Samotoin [40,41] suggested that the diamond crystal growth from the hydrocarbon gas phase occurs at the level of clusters rather than atoms or molecules. Observing that the smallest height of the growth steps of diamonds was about ~80 Å at all sources of layer growth, he concluded that crystals should grow by clusters comparable in size to this height.…”

Section: Nonclassical Crystallization In Diamond Cvdmentioning

confidence: 99%

Synthesis of nanostructures using charged nanoparticles spontaneously generated in the gas phase during chemical vapor deposition

Da-Seul¹,

Hwang²

2018

J. Phys. D: Appl. Phys.

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Nonclassical crystallization is the process in which crystals grow by deposition of nanoparticles rather than by the layer-wise deposition of atoms/ions/molecules on a crystal surface. A spontaneous generation of charged nanoparticles (CNPs) in the gas phase has been experimentally confirmed during many chemical vapor deposition (CVD) processes. The fact that crystals grown by CNPs have smooth surfaces without any void indicates that CNPs have a liquid-like or superplastic property. Based on this understanding of nonclassical crystallization in CVD processes, the synthesis of nanoparticles, thin films and nanowires can be approached systematically. Since electrical field, drag effect, size and the number of charges per particle affect the behavior of CNPs, electric bias, gas velocity, the size of the nanoparticles and the amount of charge can be new processing parameters. The size distribution of CNPs depends on the process conditions.The nanoparticles can be attracted or repelled by applying an electric bias to a substrate. If the nanoparticles are made to land on the substrate in a suitable number density, they can be used as quantum dots. In addition, nanopowders, nanowires, and nanostructures can be synthesized by CNPs with or without metallic catalysts on substrates. Herein, we will review recent results of the synthesis of nanostructures such as nanoparticles, thin films, and nanowires in the CVD process. We will also discuss the role of charge in these syntheses.

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Formulation and morphology of kaolin-filled rubber composites

Tian

2013

Applied Clay Science

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Right- and left-hand microcrystals of kaolinite and their natural abundance

Cited by 4 publications

References 1 publication

Charged nanoparticles in thin film and nanostructure growth by chemical vapour deposition

Charged nanoparticles in thin film and nanostructure growth by chemical vapour deposition

Synthesis of nanostructures using charged nanoparticles spontaneously generated in the gas phase during chemical vapor deposition

Formulation and morphology of kaolin-filled rubber composites

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