Electron-induced cutting of single-walled carbon nanotubes

Rauwald, Urs; Shaver, Jonah; Klosterman, Donald A.; Chen, Zheyi; Silvera-Batista, Carlos A.; Schmidt, Howard K.; Hauge, Robert H.; Smalley, R. E.; Ziegler, Kirk J.

doi:10.1016/j.carbon.2008.09.043

Cited by 27 publications

(34 citation statements)

References 42 publications

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“…[http://dx.doi.org/10.1063/ 1.4894815] In recent years, much effort [1][2][3][4][5][6][7][8][9][10][11][12] has been devoted to processing of carbon nanotubes (CNTs) especially singlewalled carbon nanotubes (SWCNTs) by energetic electron beam (e-beam) irradiation for their potential applications 13 in nanodevices and nanotechnology. In these studies, the structural changes at nanoscale (called thereafter as nanoinstability for short) of CNTs as induced by e-beam irradiation were generally described in terms of the existing theories such as knock-on mechanism and the subsequent atom reconstruction mostly along with some related simulations.…”

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confidence: 99%

Non uniform shrinkages of double-walled carbon nanotube as induced by electron beam irradiation

Zhu

Gong

Yang

et al. 2014

Applied Physics Letters

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Electron beam-induced nanoinstabilities of pristine double-walled carbon nanotubes (DWCNTs) of two different configurations, one fixed at both ends and another fixed at only one end, were in-situ investigated in transmission electron microscope at room temperature. It was observed that the DWCNT fixed at both ends shrank in its diameter uniformly. Meanwhile, the DWCNT fixed at only one end intriguingly shrank preferentially from its free cap end along its axial direction whereas its diameter shrinkage was offset. A mechanism of “diffusion” along with “evaporation” at room temperature which is driven by the nanocurvature of the DWCNTs, and the athermal activation induced by the electron beam was proposed to elucidate the observed phenomena. The effect of the interlayer interaction of the DWCNTs was also discussed.

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confidence: 99%

Non uniform shrinkages of double-walled carbon nanotube as induced by electron beam irradiation

Zhu

Gong

Yang

et al. 2014

Applied Physics Letters

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“…With the advent of new technologies of production of CNT, it is possible to obtain homogeneous diameters, while the length control requires additional processes (Bouanis et al, 2014). Various techniques such as mechanical fracture, selective oxidation and growth control have been implemented to shorten NTCs (Tserpes et al, 2006, Kang et al, 2006, Rauwald et al, 2009. It has found that pristine-NTC> 10 µm produce granuloma, pristine-NTC <10 µm are retained by RES, whereas oxidized SWNTC < 300nm and oxidized MWCNT <500 nm are excreted via the kidneys and bile ducts (Kolosnjaj-Tabi et al, 2010, Jain et al, 2011.…”

Section: Toxicological Aspectsmentioning

confidence: 99%

Carbon Nanotubes: a viable drug delivery platform for the treatment of cancer

Pinillos-Madrid¹,

Gallardo²

2015

J App Pharm Sci

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The development of new drug delivery platforms and specific vectorization processes for the treatment of diseases like cancer has become vitally important for the pharmaceutical industry. One of these new platforms are functionalized carbon nanotubes (f-CNTs), which are characterized by their high aspect ratio, high loading capacity, rich surface chemistry with functional groupsfor binding drugs and molecules. It has been demonstrated that functionalization processes of CNTs generate a marked decrease in toxicity, which makes them ideal candidates for clinical studies for their use as drug vectors.

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“…There are many purification strategies in literature such as mixed acids bath Chou et al (2005); Diao et al (2002), piranha solution Liu et al (1998);Ziegler et al (2005), ozonation Rauwald et al (2009), phosphomolybdic acid Warakulwit et al (2008), persulfate solution Liu et al (2007), pyrolysis Gu et al (2002) and electron beam irradiation Rauwald et al (2009). Carbon nanotubes are not only cut and purified when treated in these oxidant conditions but carboxylic functions would create at damage sites: in particular it has been shown by our group that a distribution of oxygenated species would be present on the surface of nanotubes, from carboxylic functions to aldehydes Lamberti et al (2010).…”

Section: Swcnts Functionalizationmentioning

confidence: 99%