Carbon Nanotubes

Development of Carbon Nanotubes Vacuum Field Emission Devices

Kang W.P., Wong Y.M., Davidson J.L., Kerns D.V., Huang J.H., Galloway K.F., Vanderbilt University, US

This report focuses on the design, fabrication and characterization of vacuum field emission (VFE) devices, specifically on the triode and integrated differential amplifier (diff-amp), utilizing CNTs synthesized by microwave plasma chemical vapor deposition in conjunction [...]

Fabrication and Modeling of CNT Field-Emission Devices

Koohsorkhi J., Rouhi N., Abdi Y., Mohajerzadeh S., Robertson M.D., Thompson R.D., Acadia University, CA

We report the fabrication of field-emission devices based on vertically aligned carbon nanotubes that possess a novel gate structure with applications in flat-panel displays, nanolithography systems and new sensor technologies. The devices consist of CNTs [...]

Carbon Nanotube Cathode on Metal Surface Formed with BGA Balls

Chung M., Chang C-C, Chang Y.Y., Huang B.R., Fu C.S., Chang C-C, Chang Y.Y., Lai S.W., Chiou J.M., Southern Taiwan University of Technology, TW

Carbon nanotube is the primary field emission source in many applications, but there has been limited report on direct growth of CNT on metal surface with CVD method due to technical difficulties. This research propose [...]

Electrical Contacts to Nanotubes and Nanowires: Why Size Matters

Leonard F., Talin A.A., Sandia National Laboratories, US

Electrical contacts play a key role in electronics. As new materials such as nanotubes and nanowires are explored for nanoelectronics, the fundamental aspects of electrical contacts need to be re-examined due to the unique properties [...]

Heating double wall carbon nanotubes with UV photons

Puech P., Bassil A., Flahaut E., Bacsa W.S., University Paul Sabatier, FR

Light absorption leads inevitably to electronic excitation and inelastic electron scattering, creating phonons and resulting in the increase of the lattice temperature. By using photons with energies significantly above the fundamental band gap of the [...]

Direct observation of carbon nanostructures growth using in-situ ultrahigh vacuum transmission electron microscopy

Foo Y.L., Lin M., Tan J.P.Y., Boothroyd C.B., Tok E.S., Institute of Materials Research and Engineering, SG

The growth dynamics of single-walled carbon nanotube (SWNT) is observed in real-time using an in-situ ultra-high vacuum transmission electron microscope at 650 oC. The SWNTs preferentially grow on smaller sized catalyst particles (diameter ≤ 6 [...]

Catalytically active nanostructures derived from self-assembled block copolymer templates for rationally synthesizing single-walled carbon nanotubes and understanding the growth mechanism

Lu C., Lu J., Fu Q., Lu C., Lu J., Liu J., University of California, Merced, US

Employing self-assembled catalyst-containing block copolymer templates, we have successfully generated a variety of highly ordered and uniform-sized catalytically active transition metal nanostructures. These catalyst-containing nanostructures have been used to produce high-quality and single-walled carbon nanotubes [...]

Low-temperature growth of carbon nanofibers by selective heating of catalyst

Vasenkov A.V., Kolobov V.V., Melechko A.V, CFD Research Corporation, US

A critical technological challenge for many potential carbon-nanotubes (CNT) and carbon nanofibers (CNF) applications is to have a process for a direct synthesis of aligned/micropatterned CNTs/CNFs on temperature-sensitive surfaces. Currently there is no process that [...]

Directed Growth of Carbon Nanotubes Utilizing Plasma Induced Surface Charging Voltage

Law J.B.K., Koo C.K., Thong J.T.L., National University of Singapore, SG

In this work, we present a method for directed lateral growth of CNTs between electrodes on a substrate during an in-situ CNT growth process, by utilizing plasma induced charging inherent in a Radio Frequency (RF) [...]

Chemistry: The solution for making high performance SWNT-based materials

Simard B., National Research Council of Canada, CA

We explore the chemistry of reduced SWNT and show that it is more advantegous than the chemistry of neutral SWNT. In particular we will show a novel and cost saving functionalization procedureand how it leads [...]

Synthesis of Nanostructures from Carbides Sheets

Diaz Barriga Arceo L., Garibay Febles V., Orozco E., Zeifert B., Palacios Gonzalez E., German C.R.Sr., Rios-Guerrero L., Leyte Guerrero F., Instituto Politecnico Nacional, MX

Nanotubes and nanoparticles were obtained from a lamellar solid phase using a two step method: mechanical alloying (MA) and heat treatment. MA was used to prepare the monometallic carbide and the bimetallic carbides by milling [...]

Fabrication of Cu-encapsulated Carbon Nanotube Inductors

Lee B.C., Lee J-O, Lee B.C., Lee J-O, Choi Y.K., Yoon J.-B., Korea Institute of Science and Technology(KIST), KR

In this works, we developed a top-down fabrication method to pattern and form carbon nanotube(CNT) interconnects with Cu encapsulation. Using this method, we fabricated spiral Cu-encapsulated CNT inductors for RF ICs and investigated the inductance [...]

Studies of Nanotube-based Co-axial and Resonant Oscillators

Xiao S.P., Andersen D., Hou W.Y., The University of Iowa, US

In this paper, we first investigate mechanisms of nanotube-based co-axial oscillators, shown in Figure 1, based on molecular dynamics simulation. We mainly study the interlayer friction between the outer tube and the inner tube when [...]

ALTRAS-CNFET: Full-Band Based Quantum Transport Simulator for Carbon Nanotube Field Effect Transistor Engineering: From Chirality to Device Performance

Tao Y., Liu F., Bian W., Man T.Y., Chan M., He J., Shenzhen Graduate School, Peking University, CN

ALTRAS-CNTS is a powerful full-band based quantum transport simulator for CNT energy-band and CNFET performance calculation. It can directly compute device tunneling gate current in the radial direction, drain current in the channel and other [...]

Carbon Nanotube Transistors with 60mV/decade Switching and its Capacitance Measurement

Lu Y., Dai H., Nishi Y., Stanford University, US

Recently, we have been able to approach the ultimate vertical scaling limit of carbon nanotube field effect transistors (FETs) and reliably achieve S ~ 60 mV/decade at room temperature, by non-covalent functionalization of single walled [...]

Novel Solid Phase Synthesized Carbon Nano Tube using Tube Control Agent

Nguyen K.C., Nguyen S.T., Do S.T., Le T.V., Nguyen K.C., Nguyen S.T., SAIGON HI TECH PARK, VN

Even though gas phase reaction using plasma CVD reactor seems to be the most promising for scale up of single walled and multi walled carbon nano tube (CNT) products, it still remains several serious issues [...]

Modelling the Stress Transfer in CNT Composite using Finite Element Method

Chaboki A., Sadrnejad S.A., Yahyaeii M., University of Sydney, AU

Since carbon nanotubes have special mechanical properties, they tend to be used as reinforcements in composites. The stress transfer between the nanotubes and the matrix at the interface critically controls the mechanical properties of these [...]

Coulomb Oscillations at Room-Temperature of Single-Walled Carbon Nanotube Field-Effect Transistors

Ohno Y., Asai Y., Maehashi K., Inoue K., Matsumoto K., Osaka University, JP

Single-walled carbon nanotube field-effect transistors with thin tunnel barriers were investigated, and room-temperature single-electron transistor (SET) operation was realized. Single-walled carbon nanotubes were grown by thermal chemical vapor deposition at 820 degrees Celsius for 10 [...]

Individual Carbon Nanotube Cold Field Emitters: Experimental and Modeling Studies of Integrated System Architecture

Niemann D.L., Ribaya B.P., Gunther N., Rahman M., Leung J., Nguyen C.V., Eloret Corp, NASA Ames Research Center, US

Individual carbon nanotube (CNT) cold field emitters are promising point electron sources because of their low energy spread, high brightness, and low power consumption [1-3]. Potential high-resolution applications for these efficient electron sources include advanced [...]

Modeling the Field Emission Current Fluctuation in Carbon Nanotube Thin Films

Sinha N., Roy Mahapatra D., Yeow J.T.W., Melnik R., University of Waterloo, CA

Carbon nanotubes (CNTs) are currently among the best field emitters for a variety of technological applications. However, from mathematical viewpoint, approach towards understanding the physics of nanotube based field emission of a thin film is [...]

Flame synthesis of carbon nanotubes using a double-faced wall stagnation flow burner

Woo S.K., Hong Y-T, Kwon O.C., Sungkyunkwan University, KR

The potential of using a double-faced wall stagnation flow burner in mass production of carbon nanotubes was evaluated experimentally and computationally. With nitrogen-diluted premixed ethylene-air flames established on the Ni-coated stainless steel or Ni-sintered, double-faced [...]

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