Straightening Suspended Single Walled Carbon Nanotubes by Ion Irradiation

Jung, Yung Joon; Homma, Yoshikazu; Vajtai, Róbert; Kobayashi, Yoshihiro; Ogino, T.; Ajayan, Pulickel M.

doi:10.1021/nl049550b

Cited by 43 publications

(28 citation statements)

References 15 publications

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“…This has been demonstrated in the Fe-oxide nanoparticle system. [47] The impact of ions on nanostructured objects will be influenced by object size, [36] shape (due to angle of impact effects), [48,49] as well as other physical characteristic effects such as how the objects are supported [51] or if they are porous. [50] The two latter characteristics may lead to environmental effects as objects suspended in space respond differently to an ion beam than when they are supported on a substrate, and a porous structure may adsorb and retain ambient gases or solvents for considerable time in vacuum.…”

Section: Probe Effectsmentioning

confidence: 99%

Characterization challenges for nanomaterials

Baer

Amonette

Engelhard

et al. 2008

Surface & Interface Analysis

124

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Nanostructured materials are increasingly subject to nearly every type of chemical and physical analysis possible. Due to their small sizes, there is a significant focus on tools with high spatial resolution. It is also natural to characterize nanomaterials using tools designed to analyze surfaces, because of their high surface area. Regardless of the approach, nanostructured materials present a variety of obstacles to adequate, useful, and needed analysis. Case studies of measurements on ceria and iron metal-core/oxide-shell nanoparticles are used to introduce some of the issues that frequently need to be addressed during analysis of nanostructured materials. We use a combination of tools for routine analysis including X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and x-ray diffraction (XRD) and apply several other methods as needed to obtain essential information. The examples provide an introduction to other issues and complications associated with the analysis of nanostructured materials including particle stability, probe effects, environmental effects, specimen handling, surface coating, contamination, and time.

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Section: Probe Effectsmentioning

confidence: 99%

Characterization challenges for nanomaterials

Baer

Amonette

Engelhard

et al. 2008

Surface & Interface Analysis

124

View full text Add to dashboard Cite

show abstract

“…[6][7][8][9][10][11][12][13][14][15][16] Besides, it was demonstrated that nanotubes can be interconnected or merged 9,12,17,18 and that irradiation can give rise to many interesting phenomena, such as extreme pressure inside nanotubes 19 or fullerenelike "onions," 6,20 so that these systems can be used as nanolaboratories for studying pressure-induced transformations at the nanoscale. Furthermore, recent experiments indicate that ion, [21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37][38] electron, 6,39-52 and high energy photon [53][54][55][56] irradiation can be used to tailor the mechanical, 8,10 electronic, 11,[21][22][23] and even magnetic …”

Section: Introductionmentioning

confidence: 99%

Ion and electron irradiation-induced effects in nanostructured materials

Krasheninnikov¹,

Nordlund²

2010

Journal of Applied Physics

947

591

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A common misconception is that the irradiation of solids with energetic electrons and ions has exclusively detrimental effects on the properties of target materials. In addition to the well-known cases of doping of bulk semiconductors and ion beam nitriding of steels, recent experiments show that irradiation can also have beneficial effects on nanostructured systems. Electron or ion beams may serve as tools to synthesize nanoclusters and nanowires, change their morphology in a controllable manner, and tailor their mechanical, electronic, and even magnetic properties. Harnessing irradiation as a tool for modifying material properties at the nanoscale requires having the full microscopic picture of defect production and annealing in nanotargets. In this article, we review recent progress in the understanding of effects of irradiation on various zero-dimensional and one-dimensional nanoscale systems, such as semiconductor and metal nanoclusters and nanowires, nanotubes, and fullerenes. We also consider the two-dimensional nanosystem graphene due to its similarity with carbon nanotubes. We dwell on both theoretical and experimental results and discuss at length not only the physics behind irradiation effects in nanostructures but also the technical applicability of irradiation for the engineering of nanosystems.

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“…The initial efforts involved applying FIB to modify and manipulate CNTs directly with Ga+ ion beams [13][14][15][16]. However, due to the high impact momentum of Ga + , the carbon atoms are easily knocked out from their lattice locations and structural defects were induced inside the CNTs.…”

Section: Introductionmentioning

confidence: 99%

Focused Ion Beam Fabrication of Individual Carbon Nanotube Devices

Chow

Chai

2007

MRS Proc.

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Focused ion beam (FIB) techniques have found many applications in nanoscience and nanotechnology applications in recent years. However, not much work has been done using FIB to fabricate carbon nanotube devices. This is mainly due to the fact that carbon nanotubes are very fragile and energetic ion beam from FIB can easily damage the carbon nanotubes. Here we report the fabrication of carbon nanotube (CNT) devices, including electron field emitters, atomic force microscope tips, and nano-pores for biomedical applications. This is made possible by a unique, coaxial configuration consisting of a CNT embedded in a graphitic carbon coating, which was developed by us for FIB processing of carbon nanotubes. The CNT-based atomic force microscope tip has been demonstrated. The electron field emission from the tip and the side wall of CNT will be discussed. We will also report the fabrication of a multiwall carbon nanotube nanopore for future applications.

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Straightening Suspended Single Walled Carbon Nanotubes by Ion Irradiation

Cited by 43 publications

References 15 publications

Characterization challenges for nanomaterials

Characterization challenges for nanomaterials

Ion and electron irradiation-induced effects in nanostructured materials

Focused Ion Beam Fabrication of Individual Carbon Nanotube Devices

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