Focused ion beam milling of carbon nanotube yarns to study the relationship between structure and strength

Sears, Kallista; Skourtis, Chris; Atkinson, K. R.; Finn, Niall; Humphries, William

doi:10.1016/j.carbon.2010.08.004

Cited by 56 publications

(23 citation statements)

References 23 publications

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“…Irradiation times range from 10-60 min, which correspond to dosages of ~3x10 15 -2x10 16 e/cm 2 . The average values of the resistivity increased with irradiation time for up to 30 min and decrease with further irradiation, though with the presence of scattering in the data.…”

Section: Resultsmentioning

confidence: 99%

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Electrical Properties of Pristine and Electron Irradiated Carbon Nanotube Yarns at Small Length Scales

2014

Mod Chem Appl

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In this report the effect of e-beam irradiation on Carbon Nanotube (CNT) yarns electrical resistivity was studied by employing electron beam irradiation on a Transmission Electron Microscope (TEM) follow by two probe resistivity method in a Scanning Electron Microscope (SEM). Both local crosslinking and amorphous regions within the CNT yarn were observed with increased electron dosage, as revealed by High Resolution TEM (HRTEM). The resistivity lower bound value was obtained at the maximum dosage used, which was below the resistivity of the pristine yarn. The resistivity data is explained by a proposed model that takes into account the microstructural changes.

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Section: Resultsmentioning

confidence: 99%

“…Milling procedures involved the formation of a trench in the CNT yarns using an ion beam current of 2nA at 30 kV, followed by low current cleaning steps of the imaged surface [15]. Figure 1 depicts the schematic of the sample mount for e-beam irradiation in the TEM.…”

Section: Methodsmentioning

confidence: 99%

Electrical Properties of Pristine and Electron Irradiated Carbon Nanotube Yarns at Small Length Scales

2014

Mod Chem Appl

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“…Sears et al performed one of the fi rst comprehensive studies in which FIB milling was used to monitor changes in CNT yarn structure with varying spinning parameters [ 40 ]. In this study, FIB milling was used to make sections both parallel and perpendicular to the yarn axis and in this way monitor the internal structure of yarns with a range of twist densities and acetone densifi cation.…”

Section: Effect Of Fundamental Spinning Parameters On Internal Cnt Yamentioning

confidence: 98%

“…The effect of fundamental spinning conditions (such as twist) [ 40 ] 2. Densifi cation with solvents [ 22 , 27 , 40 ] 3.…”

Section: Examples: Cnt Yarnsmentioning

confidence: 99%

“…Prior to FIB milling, information about the arrangement of nanotubes was typically inferred from SEM images of the sample surface or from X-ray diffraction which can give an indication of the degree of their alignment [ 17 , 39 ]. More recently FIB milling has emerged as an effective tool for forming cross sections which can then be further imaged by either SEM [ 40 ] or TEM [ 24 ]. FIB milling is hence a powerful tool for examining the internal structure and enables the development of methods to manipulate the internal structure for specifi c properties.…”

Section: Introductionmentioning

confidence: 99%

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Focused Ion Beam Milling of Carbon Nanotube Yarns and Bucky-Papers: Correlating Their Internal Structure with Their Macro-Properties

Sears

Dumée

Finn

et al. 2013

Lecture Notes in Nanoscale Science and Technology

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Focused ion beam (FIB) milling through carbon nanotube (CNT) yarns and bucky-papers followed by scanning electron microscopy has recently emerged as a powerful tool for eliciting details of their internal structure. The internal arrangement of CNTs in bucky-papers and yarns directly affects their performance and characteristics. Consequently this information is critical for further optimisation of these structures and to tailor their properties for specifi c applications. This chapter describes in detail FIB milling of CNT yarns and bucky-papers and gives a range of examples where FIB milling has enabled a better understanding of how processing conditions and treatments affect the internal structure. Emphasis is placed on how FIB milling elucidates the infl uence of fabrication conditions on the internal arrangement of CNTs and how this infl uences the material's macroscopic properties.

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Improved Mechanical Performance of CNTs and CNT Fibres in Nanocomposites Through Inter-Wall and Inter-Tube Coupling

McCarthy

Byrne

O’Brien

et al. 2013

Springer Series in Materials Science

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Focused ion beam milling of carbon nanotube yarns to study the relationship between structure and strength

Cited by 56 publications

References 23 publications

Electrical Properties of Pristine and Electron Irradiated Carbon Nanotube Yarns at Small Length Scales

Electrical Properties of Pristine and Electron Irradiated Carbon Nanotube Yarns at Small Length Scales

Focused Ion Beam Milling of Carbon Nanotube Yarns and Bucky-Papers: Correlating Their Internal Structure with Their Macro-Properties

Improved Mechanical Performance of CNTs and CNT Fibres in Nanocomposites Through Inter-Wall and Inter-Tube Coupling

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