Dynamic observation of the bending behavior of carbon nanotubes by nanoprobe manipulation in TEM

Kuzumaki, Tôru; Kitakata, Shintaro; Enomoto, Kazuki; Yasuhara, Toshiyuki; Ohtake, Naoto; Mitsuda, Yoshitaka

doi:10.1016/j.carbon.2004.04.035

Cited by 18 publications

(8 citation statements)

References 15 publications

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“…The Arc-CNT showed local plastic deformation over the elastic limit, while that of the CVD-CNT were failed in a brittle fracture mode. The difference in their mechanical characteristics was attributed to the atomic structure of the defects on the cylindrical wall of the two kinds of nanotubes and to their stiffness according to the difference in a diameter (number of the graphitic walls) [27]. A recent study also showed yielding in tensile test of Arc-CNT [28].…”

Section: Nano Researchmentioning

confidence: 90%

In situ TEM measurements of the mechanical properties and behavior of WS2 nanotubes

et al. 2008

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The mechanical properties of individual WS 2 nanotubes were investigated and directly related to their atomic structure details by in situ transmission electron microscope measurements. A brittle mode deformation was observed in bending tests of short (ca. 1 μm in length) multilayer nanotubes. This mode can be related to the atomic structure of their shells. In addition, longer nanotubes (6 7μm in length) were deformed in situ scanning electron microscope, but no plastic deformation was detected. A "sword-in-sheath" fracture mechanism was revealed in tensile loading of a nanotube, and the sliding of inner shells inside the outermost shell was imaged "on-line". Furthermore, bending modulus of 217 GPa was obtained from measurements of the electric-fi eldinduced resonance of these nanotubes.

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Section: Nano Researchmentioning

confidence: 90%

In situ TEM measurements of the mechanical properties and behavior of WS2 nanotubes

et al. 2008

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“…Tungsten tips have become promising nanoprobes for scanning tunneling microscopy (STM) [17], nanoindentation and nanomanipulation in scanning electron microscopes 2 Advances in Optics (SEM) [18], and contact experiments inside a transmission electron microscope (TEM) [19]. In recent years the improvement of spatial resolution of atomic and subatomic particles as well as the nanoscale quantum wire, quantum dots, and quantum well is in tremendous progress with improving the capabilities of transmission electron microscope (TEM) [20,21].…”

Section: Introductionmentioning

confidence: 99%

A Theoretical Study of Bulk Tungsten (W) Based on Momentum Transfer (q-Dependent)

Thapa

2014

Advances in Optics

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The ground state electronic properties of bulk (W) were studied within the density functional theory (DFT). We have also analyzed the momentum-(q-) dependent loss function, dielectric constant, and optical conductivity (OC) within TD-DFT random-phase approximation (RPA). The loss function is plotted in the energy range 0-55 eV. The energy loss function spectrum shows four prominent peaks, two lower peaks below along with two sharp peaks above 30 eV. The different nature of peaks depends on the momentum transfer q. The peak caused by interband transition showed a less pronounced dispersion. From the dielectric function curve we have predicted the plasmon excitation at around 1.75 eV and calculated the corresponding plasma frequency ( ) = 26.585 × 10 14 s −1 .

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“…We discuss cases of non‐linear acquisition as intermediate between binary and quantitative tomography. Methods are illustrated using two important categories of regularly shaped nanostructures: (i) octahedral nanoparticles, such as CeO 2 , used as catalysts (Trovarelli, 1996) or UV absorption agents (Mogensen et al ., 2000); (ii) cone shaped objects, such as tungsten tips (uniform or core shell) commonly used for scanning probe microscopy and nanoindentation applications (Kuzumaki et al , 2004; Bobji et al , 2005).…”

Section: Introductionmentioning

confidence: 99%

Electron tomography of regularly shaped nanostructures under non‐linear image acquisition

Saghi

Möbus

2008

Journal of Microscopy

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SummaryElectron tomography allows the 3D quantitative characterization of nanostructures, provided a monotonic relationship is fulfilled between the projected signal and the atomic number and thickness of the specimen. This requirement is not satisfied if the micrographs are affected by (i) diffraction contrast, (ii) detector saturation or (iii) contrast inversion due to absorption (high-angle scattering) at high thickness. Artefacts related to the non-monotonic tomography acquisition are examined using computer simulations and experimental tilt series of tungsten tips and CeO 2 nanoparticles. Conditions are derived under which in spite of the non-linear artefacts the information is sufficient for reconstructing the 3D morphology of convex objects by geometric tomography.

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Dynamic observation of the bending behavior of carbon nanotubes by nanoprobe manipulation in TEM

Cited by 18 publications

References 15 publications

In situ TEM measurements of the mechanical properties and behavior of WS2 nanotubes

In situ TEM measurements of the mechanical properties and behavior of WS2 nanotubes

A Theoretical Study of Bulk Tungsten (W) Based on Momentum Transfer (q-Dependent)

Electron tomography of regularly shaped nanostructures under non‐linear image acquisition

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