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Today's high functionality electronic circuits require faster interconnection speed, better thermal conductivity and the good mechanical properties for reliability. These requirements calls for enhanced properties of the present solder materials. Appropriate reinforcements in the existing solder material will help in achieving much improved electrical, mechanical and thermal properties. Carbon Nano...
In this study, we used four different hydrazines to react with CNTs to prepare CNT-based inks. We found that the ink with CNTs subjected to the 2,4-dinitrophenylhydrazine treatment exhibited much better dispersion property than the inks with CNTs treated with other organic hydrazines. In other words, within 3 days, all ink dispersions began to bundle and precipitate after the sample vials were left...
Centrifuge coating was implemented to fabricate nanostructured conductive layers through solution processing at room temperature. This coating procedure allows fast evaporation, thereby fixing the nanomaterials in their dispersed state onto a substrate by the centrifuge action. Material wastes were minimized by mitigating the effects of particle reaggregation. Using this method, we fabricate single-wall...
We studied the change of electrical resistance under climate controlled conditions of thin film coatings which are composed of multi-walled carbon nanotubes (MWCNTs) and polyvinylpyrrolidone (PVP). The presented films are characterized via DC resistance measurements in a climate control chamber with different humidity levels. Our measurements show significant increase of relative resistance change...
In this paper, we present a study of 2-D Carbon Nanotubes “CNTs” thin film. Transport and noise fluctuation of two types of films are measured and compared. We have developed a theoretical model based on CNT physics, where the films are described as an electrical network. Simulations using a Modified Nodal Analysis “MNA” provide DC and noise characteristics comparable to the experimental results.
Carbon nanotube (CNT) films made from sing-wall and multi-wall nanotubes (SWCNTs and MWCNTs) were investigated recently as strain gauge for strain sensing. The quality of CNT films is important thereby as well as for many related applications. In this paper relevant processing factors such as the sonication time and concentration of sodium dodecyl sulfate (SDS) are investigated to characterize their...
This paper reports on the analytical performance of a disposable electrochemical sensor for the detection of hydrogen peroxide, using screen-printed carbon based electrodes (SPCEs) modified with a dispersion of multi-wall carbon nanotubes in chitosan (CHIT/MWCNT). The modified sensors showed an excellent electrocatalytic activity towards hydrogen peroxide, respect to the high overvoltage characterizing...
We present a new method to fabricate thin films using single-walled carbon nanotubes and a urethane-based transparent polymer. We construct an Erbium-doped fiber laser to test our films as saturable absorbers to passive mode-lock them. As results, pulse-trains were achieved and we carry on an optimization study about the relation involving cavity length, total cavity dispersion, absorption strength...
We performed time-domain terahertz (THz) spectroscopy on single-walled carbon nanotube films. We found that a filtration method provides an efficient way of fabricating thick nanotube films which is capable of effective shielding of THz waves. Shielding effectiveness of more than 40 has been achieved from our method. In addition, all of the films we fabricated demonstrate a good metallic behavior...
Polymer composites based on poly(methyl methacrylate)/ carboxylic acid group functionalized multi-wall carbon nanotubes (PMMA/MWNT), were prepared by the exsitu and in-situ technique with 0.05% wt loading of the CNT. Nanocomposite films were fabricated by solvent casting method. Electrical conductivity of nanocomposites and the base PMMA polymer was measured. The different percolation thresholds were...
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