Papers – Page 89 – TechConnect Briefs

Aqueous Dispersion of Single-Walled Carbon Nanotubes by using Self-doped Polyaniline as Dispersant

Hwang J.H., Lee H.J., Lee H.S., Lee M.H., Hong M.S., Lee H.J., Lee H.S., Lee M.H., Lee H.J., Lee H.S., Lee M.H., Chonbuk National University, KR

In this research, a water-soluble self-doped polyaniline, poly(aniline N-butylsulfonate) (PAnBuS), was introduced to disperse SWNTs. Dispersion of SWNTs functionalized with PAnBuS was achieved ex-situ by simply mixing both components using ultrasonic treatment. The PAnBuS-functionalized SWNTs [...]

Carbon nanotube superlattices- An oscillatory metallic behaviour

Agrawal B.K., Pathak A., Allahabad University, IN

The physical properties of the (n,n)/(2n,0); n = 3 and 6 superlattices of the carbon nanotubes (CN’s) has been studied by employing the first–principle pseudopotential method. The curvature effects on the various properties are also [...]

SWNTs inhibit normal physiological function of calcium ion channels through yttrium release

Jakubek L.M., Raingo J., Lipscombe D., Hurt R.H., Brown University, US

The calcium ion channel is a voltage gated channel that enables calcium to enter electrically active cells. Proper function of these channels is essential for gene expression, neuronal excitability, muscle contraction and the release of [...]

Osteogenic induction on single-walled carbon nanotube scaffolds

Zanello L.P., Sharma P., Corzano R., Hauschka P., University of California Riverside, US

Production of bone materials is the result of secretory activities by osteoblasts, the bone-forming cells. In the fractured and wounded bone, successful repair and/or regeneration depends on the capacity of osteoblast precursors to proliferate and [...]

Carbon Nanotube Interfaces for Single Molecular Level Bio Sensing

Choi W.B., Vedala H., Roy S., Kim T-H., Florida International University, US

Single molecule detection, aimed both at fundamental investigation and applications, has recently been attracting a lot of attentions. The present set of studies is focused on the design, fabrication and optimization of novel carbon nanotube(CNT) [...]

First-principles studies of electrophilic molecules on the carbon nanotubes

Park S., Kong K-J, So H-M, Buh G-H, Lee J-O, Chang H., Korea Research Institute of Chemical Technology, KR

Recently we have reported that some electrophilic molecules, such as 2,4,6-triphenylpyrylium tetrafluoroborate (2,4,6-TPPT) and 1,3-benzodithiolylium tetrafluoroborate (1,3-BDYT), preferentially interact with metallic single-walled carbon nanotubes (SWNTs). It resulted in selective suppression of conductance in metallic carbon [...]

Advantages and Limitations of Diamond-Like Carbon as a MEMS Thin Film Material

Ohlckers P., Skotheim T., Dmitriev V., Kirpilenko G., Vestfold University College, NO

We can observe from the material properties of Diamond-Like Carbon (DNC) several characteristics can be favourable exploited to make MEMS devices with DNC thin films: Extraordinary yield strength, extraordinary stiffness, high indentation hardness and wear [...]

High Current Cold Electron Source Based on Carbon Nanotube Field Emitters and Electron Multiplier Microchannel Plate

Raghunandan S., Choi W., Florida International University, US

Vacuum microelectronics has been studied for decades to develop unique devices such as rf-generators, high efficiency flat panel displays, x-ray sources and so on. In recent years field emitters based on carbon nanotubes (CNTs) and [...]

Design Optimization of Field Emission from a Stacked Carbon Nanotube Array

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

Field emission (FE) from carbon nanotubes (CNTs) grown on a cathode substrate is difficult to characterize using simple formulae or data fitting, which is due to (1) electron-phonon interaction (2) electromechanical force field leading to [...]

Resistance measurements and weak localization in long SWNTs

Gabrielli P.G., Gabrielli S., Gabrielli P.G., Gabrielli S., Lisi N., ENEA, IT

In the theory of the 1-d electron systems, called Tomonaga-Luttinger-liquid (LL), the correlated electron state is characterized by a parameter g that measures the strength of the interaction between the electrons (g=1 for non-interacting electron [...]