In situ catalyzation of carbon nanostructures growth in low-frequency inductively coupled plasmas

Long, Jidong; Xu, Shuyan; Huang, Shiyong; Rutkevych, P.P.; Xu, Manzhang; Diong, Cheong Hoong

doi:10.1109/tps.2005.845340

Cited by 18 publications

(9 citation statements)

References 4 publications

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“…The surface temperature was maintained in the range of 400-550°C, while the dc bias was fixed at −100 V. Other experimental details are the same as in our earlier reports. 17,19,20 The most striking observations in this work were: ͑i͒ the radius of the flat top of the nanocones decreases as they grow and the transition to an ultrasharp needlelike shape occurs at the final growth stage, and ͑ii͒ growth still continues after a complete coverage of Ni catalyst nanoparticles by nanocone bases and even in cases when the bases of some nanostructures come into contact. Figure 1 shows two scanning electron microscopy images of tapered flat top ͑a͒ and needlelike ͑b͒ nanocones developed after 22 and 25 min into the growth process.…”

mentioning

confidence: 73%

“…It is also relevant to mention that the flat top surfaces of the nanocones of our interest are not primarily attributed to etching/sputtering effects caused by focused ion fluxes. 20 Indeed, quite similar VANs can be formed in neutral gas-based processes with no ion-and electric fieldrelated effects. 18 Finally, the proposed growth mechanism is applicable to a variety of other growth routes and plateletstructured single-crystalline vertical nanostructures such as nanorods and nanowires.…”

mentioning

confidence: 99%

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Plasma-assisted self-sharpening of platelet-structured single-crystalline carbon nanocones

Levchenko

Ostrikov

Long

et al. 2007

Applied Physics Letters

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A mechanism and model for the vertical growth of platelet-structured vertically aligned single-crystalline carbon nanostructures by the formation of graphene layers on a flat top surface are proposed and verified experimentally. It is demonstrated that plasma-related effects lead to self-sharpening of tapered nanocones to form needlelike nanostructures, in a good agreement with the predicted dependence of the radius of a nanocone’s flat top on the incoming ion flux and surface temperature. The growth mechanism is relevant to a broad class of nanostructures including nanotips, nanoneedles, and nanowires and can be used to improve the predictability of nanofabrication processes.

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confidence: 73%

mentioning

confidence: 99%

Plasma-assisted self-sharpening of platelet-structured single-crystalline carbon nanocones

Levchenko

Ostrikov

Long

et al. 2007

Applied Physics Letters

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“…Figure 25(a) shows vertically standing carbon nanowalls (CNWs) grown by hydrogen radical-assisted PECVD on a Si surface without any catalyst, using fluorocarbon precursor [254]. Similar CNWs were produced by other groups [256,257]. Interestingly, such catalyst-free CNW growth is only possible in a plasma.…”

Section: Graphene Nanosheetsmentioning

confidence: 94%

Plasma nanoscience: from nano-solids in plasmas to nano-plasmas in solids

Ostrikov

Neyts

Meyyappan

2013

Advances in Physics

498

391

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The unique plasma-specific features and physical phenomena in the organization of nanoscale solid-state systems in a broad range of elemental composition, structure, and dimensionality are critically reviewed. These effects lead to the possibility to localize and control energy and matter at nanoscales and to produce self-organized nano-solids with highly unusual and superior properties. A unifying conceptual framework based on the control of production, transport, and self-organization of precursor species is introduced and a variety of plasmaspecific non-equilibrium and kinetics-driven phenomena across the many temporal and spatial scales is explained. When the plasma is localized to micrometer and nanometer dimensions, new emergent phenomena arise. The examples range from semiconducting quantum dots and nanowires, chirality control of single-walled carbon nanotubes, ultra-fine manipulation of graphenes, nano-diamond, and organic matter, to nano-plasma effects and nano-plasmas of different states of matter. Contents

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“…An interesting question arising from the contributions discussed above [8][9][10] and a number of other reports (see, e.g. [4,[63][64][65] and references therein) is what exactly causes crystallization of nanoparticles and nanostructures synthesized in plasma environments. In this regard, there appear a few factors that can improve crystallization of plasma-synthesized nanoassemblies.…”

Section: Processes Based On Non-equilibrium Plasmasmentioning

confidence: 98%

Plasma-aided nanofabrication: where is the cutting edge?

Ostrikov¹,

Murphy²

2007

J. Phys. D: Appl. Phys.

242

151

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Plasma-aided nanofabrication is a rapidly expanding area of research spanning disciplines ranging from physics and chemistry of plasmas and gas discharges to solid state physics, materials science, surface science, nanoscience and nanotechnology and related engineering subjects. The current status of the research field is discussed and examples of superior performance and competitive advantage of plasma processes and techniques are given. These examples are selected to represent a range of applications of two major types of plasmas suitable for nanoscale synthesis and processing, namely thermally non-equilibrium and thermal plasmas. Major concepts and terminology used in the field are introduced. The paper also pinpoints the major challenges facing plasma-aided nanofabrication and identifies some emerging topics for future research.

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In situ catalyzation of carbon nanostructures growth in low-frequency inductively coupled plasmas

Cited by 18 publications

References 4 publications

Plasma-assisted self-sharpening of platelet-structured single-crystalline carbon nanocones

Plasma-assisted self-sharpening of platelet-structured single-crystalline carbon nanocones

Plasma nanoscience: from nano-solids in plasmas to nano-plasmas in solids

Plasma-aided nanofabrication: where is the cutting edge?

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