Three-dimensional Nanorobotic Manipulations of Carbon Nanotubes

2002 ◽  
Vol 14 (3) ◽  
pp. 245-252 ◽  
Author(s):  
Lixin Dong ◽  
◽  
Fumihito Arai ◽  
Toshio Fukuda ◽  
◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Flexural Rigidity ◽  
Three Dimensional ◽  
Building Blocks ◽  
Intermolecular Forces ◽  
Multiwalled Carbon ◽  
Atomic Force ◽  
Manipulation System ◽  
Afm Cantilever ◽  
End Effectors

A nanorobotic manipulation system with 10 degreesof-freedom (DOFs) is presented and applied in 3-D manipulation of carbon nanotubes (CNTs) by controlling intermolecular forces. Manipulators are actuated with PicomotorsTM (New Focus Inc.) for coarse motions and PZTs for fine ones, and operated inside a scanning electronic microscope (SEM). Resolutions of manipulators are better than 30nm (linear) and 2mrad (rotary) for coarse motions, and within nanoorder for fine ones. Atomic force microscope (AFM) cantilevers are used as end-effectors, and van der Waals forces between them and objects are controlled by applying dielectrophoresis. Individual multiwalled carbon nanotubes (MWNTs) have been picked up on an AFM cantilever, placed between two cantilevers, and bent between a cantilever and sample substrate. As basic building blocks for more complex nanostructures and devices, CNT-junctions are constructed. A cross-junction was constructed with two MWNTs (∼ø40nm × 6μm and ∼ø50nm ö 7μm), and a T-junction was made of two MWNTs (∼ø40nm × 3μm and ∼ø50nm × 2μm). A kink junction is formed by bending an MWNT (∼ø40nm × 6μm) over its elastic limit for 20 times. Force measurements are performed and the flexural rigidity and Young's Modulus of an ∼ø30nm ∼7μm MWNT are estimated in situ to be 8.641 × 10-20Nm2 and 2.17TPa. Such manipulations are essential for both the property characterization of CNTs and the fabrication of functional nanosystems.

scholarly journals A porous 3D-RGO@MWCNT hybrid material as Li–S battery cathode

2019 ◽  
Vol 10 ◽  
pp. 514-521 ◽  
Author(s):  
Yongguang Zhang ◽  
Jun Ren ◽  
Yan Zhao ◽  
Taizhe Tan ◽  
Fuxing Yin ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
3D Structure ◽  
Three Dimensional ◽  
Rate Capability ◽  
Composite Matrix ◽  
Multiwalled Carbon ◽  
Shuttle Effect ◽  
Reduced Graphene

In this work, a unique three-dimensional (3D) structured carbon-based composite was synthesized. In the composite, multiwalled carbon nanotubes (MWCNT) form a lattice matrix in which porous spherical reduced graphene oxide (RGO) completes the 3D structure. When used in Li–S batteries, the 3D porous lattice matrix not only accommodates a high content of sulfur, but also induces a confinement effect towards polysulfide, and thereby reduces the “shuttle effect”. The as-prepared S-3D-RGO@MWCNT composite delivers an initial specific capacity of 1102 mAh·g−1. After 200 charging/discharge cycles, a capacity of 805 mAh·g−1 and a coulombic efficiency of 98% were maintained, implying the shuttle effect was greatly suppressed by the composite matrix. In addition, the S-3D-RGO@MWCNT composite also exhibits an excellent rate capability.

In-plane shear of nanoprepreg/nanostitched three-dimensional carbon/epoxy multiwalled carbon nanotubes composites

2019 ◽  
Vol 53 (24) ◽  
pp. 3413-3431 ◽  
Author(s):  
Kadir Bilisik ◽  
Nesrin Karaduman ◽  
Gulhan Erdogan ◽  
Erdal Sapanci ◽  
Sila Gungor
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Shear Fracture ◽  
Three Dimensional ◽  
Carbon Fabric ◽  
Multiwalled Carbon ◽  
Plane Shear ◽  
The Matrix ◽  
Delamination Area ◽  
Base Structure

The in-plane shear properties of nanostitched three-dimensional (3D) carbon/epoxy composites were investigated. Adding the stitching fiber or multiwalled carbon nanotubes or nanostitched fiber into carbon fabric preform slightly improved the shear strength and modulus of stitched and stitched nanocomposites. The in-plane shear fracture of the base and nanostructures was extensive delamination and tensile fiber failures in the sheared region. But, the stitched and stitched nanocomposites had angular deformation of the stitching yarns in the fiber scissoring areas, shear hackles in the matrix and successive fiber breakages in the interlayers. Probably, this mechanism prohibited extensive interlayer opening in the nanostitched composites. The results exhibited that introducing the stitching fiber (1.44%) and multiwalled carbon nanotubes (0.03125%) in the base structure enhanced its transverse fracture properties as a form of confined delamination area. Therefore, the damaged tolerance properties of the stitched nanocomposites were enhanced.

Adhesive and Mechanical Properties of Carbon Nanotube Probes Contacting Chemically-Treated Surfaces

2011 ◽  
Author(s):  
Kane M. Barker ◽  
Al Ferri ◽  
Lawrence A. Bottomley
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Mechanical Response ◽  
Tensile Load ◽  
Image Resolution ◽  
Adhesive Properties ◽  
Atomic Force ◽  
Afm Cantilever ◽  
Walled Carbon Nanotubes ◽  
Static Coefficient Of Friction

Carbon nanotubes are useful in a variety of measurement applications. In the case of Atomic Force Microscopes (AFMs), carbon nanotubes can be affixed to the tip of the AFM cantilever to improve image resolution and enable images of surfaces with deep crevices and trench structures. In this paper, the mechanical response of long, straight, small walled carbon nanotubes (SWNTs) under compressive and tensile load is examined with an atomic force microscope. Multi-dimensional force spectroscopy (MDFS) is used to simultaneously measure the cantilever resonant frequency, deflection, and scanner motion. The acquired force curves reveal that the SWNT buckles shortly after contact is initiated. As the scanner continues to rise and then reverses direction, the SWNT undergoes a number of adhesion/sticking episodes, buckling, and slip events. The bulk properties of the nanotube are estimated by measuring the shift in natural frequency during tension. Finally, the carbon nanotube is modeled as an elastica in order to predict the post-buckled shape of the SWNT. By comparing the model results with MDFS results, the static coefficient of friction between the SWNT and a variety of surfaces is estimated. The study suggests that MDFS has a wide applicability for studying the mechanical and adhesive properties of various nanotubes, nanorods and nanofibers.

scholarly journals Electrical and rheological percolation behavior of multiwalled carbon nanotube-reinforced poly(phenylene sulfide) composites

2016 ◽  
Vol 51 (2) ◽  
pp. 199-208 ◽  
Author(s):  
B Ribeiro ◽  
RB Pipes ◽  
ML Costa ◽  
EC Botelho
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Three Dimensional ◽  
Polyphenylene Sulfide ◽  
Melt Mixing ◽  
Multiwalled Carbon ◽  
Single Screw Extruder ◽  
Percolation Behavior ◽  
Electron Microscopy Analysis ◽  
Microscopy Analysis

Polyphenylene sulfide-based nanocomposites filled with unmodified multiwalled carbon nanotubes from 0.5 wt% to 8.0 wt% have been prepared by melt mixing technique with a single-screw extruder and hot press. Transmission electronic microscopy and scanning electron microscopy analysis were carried out in order to assess the multiwalled carbon nanotubes dispersion throughout the polyphenylene sulfide matrix. Electrical conductivity of the polymer was dramatically enhanced by about 11 decades between 2.0 wt% and 3.0 wt% of nanotubes, suggesting the formation of three-dimensional conductive network within the polymeric matrix. The storage modulus (G′) of neat polyphenylene sulfide presented an increase by two orders of magnitude when 2.0 wt% of pristine multiwalled carbon nanotubes was considered, with the formation of an interconnected nanotube structure, indicative of “pseudo-solid-like” behavior. In addition, percolation networks were formed when the loading levels achieve up to 1.5 wt% for multiwalled carbon nanotubes/polyphenylene sulfide composites.

Three-dimensional nanocomposite formed by hydrophobic multiwalled carbon nanotubes threading titanium dioxide as the counter electrode of enhanced performance dye-sensitized solar cells

RSC Advances ◽  
2016 ◽  
Vol 6 (60) ◽  
pp. 55071-55078 ◽  
Author(s):  
Zhichun Yang ◽  
Waqar Ahmad ◽  
Liang Chu ◽  
Majid Raissan Al-bahrani ◽  
Fanfan Tu ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Solar Cells ◽  
Multiwalled Carbon Nanotubes ◽  
Counter Electrode ◽  
Dye Sensitized Solar Cells ◽  
Three Dimensional ◽  
Multiwalled Carbon ◽  
Dye Sensitized ◽  
Novel Strategy ◽  
Sensitized Solar Cells

A novel strategy of fast solvent induced assembly is used to synthesize a three-dimensional (3D) nanocomposite of multiwalled carbon nanotubes (MWCNTs) and TiO2, as the counter electrode (CE) of dye-sensitized solar cells (DSSCs).

scholarly journals Three-dimensional bundle-like multiwalled carbon nanotubes composite for supercapacitor electrode application

2021 ◽  
Vol 22 ◽  
pp. 100569
Author(s):  
Hao-Lin Hsu ◽  
Milon Miah ◽  
Shyamal Kumar Saha ◽  
Jean-Hong Chen ◽  
Lung-Chuan Chen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Three Dimensional ◽  
Supercapacitor Electrode ◽  
Multiwalled Carbon
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