carbon nanotube – Page 5 – TechConnect Briefs

The acid-base properties of carboxylated CNT and the design of CNTFET biosensor

Kwon H.J., Woo J-M, Lim J., Kim S-H, Park Y.J., Seoul National University, KR

We observed the sign of the two responses from carbon nanotube field effect transistor (CNTFET) in aqueous solution by means of dynamic measurements. Two types of surface group, the hydroxyl and the carboxyl group of [...]

Change of the Electronic Conductivity of CNTs and Graphene Sheets Caused by a Three-dimensional Strain Field

Ohnishi M., Suzuki K., Miura H., Tohoku University, JP

Since the electronic structure of deformed carbon nanotubes (CNTs) varies widely depending on their chirality and deformation mode, CNTs have the potential to be high-quality strain sensors. The authors revealed the possibility of the high [...]

Acoustic energy harvesting using nanotube sheet flutter

Kang T.J., Jang E.Y., Lima M.D., Im H., Ovalle-Robles R., Kim T., Kim Y.H., Baughman R.H., Kim T., Kim Y.H., Seoul National University, KR

Energy harvesting from the surrounding environment has attracted much interest for diverse applications. One of the most widely available forms of ambient energy is acoustic noise, which is essentially inexhaustible and everywhere, however few research [...]

In-situ structural characterization of SWCNTs for probing the polymer/nanorod interactions

Liu T., Florida State University, US

Quantitative characterization of the structures of single-walled carbon nanotubes (SWCNTs) in the dispersion is important. It provides critical information for quality assurance of SWCNT dispersions, and more importantly for understanding and optimizing the properties and [...]

Effect of Carbon Nanotubes on Chinese Hamster Ovarian Cells

Chen H.H., Chen M., Luca J.A., Chen H.H., Chen M., Point Loma Nazarene University, US

We report the effect of carbon nanotubes at the cellular level using purified single-walled carbon nanotubes (SWNTs) resuspended in physiological compatible phosphate buffered saline (PBS) and systematically study its impact on Chinese Hamster Ovarian (CHO) [...]

A Fully Anlytical Model for Carbon Nanotube FETs including Quantum Capacitances and Electrostatics

Wei L., Frank D.J., Chang L., Wong H.S.P., Massachusetts Institute of Technology, US

In this paper, an analytical model of intrinsic carbon nanotube field effect transistors (CNFETs) is presented based on ballistic transport and careful analysis of the quantum capacitances, which requires neither iteration nor numeric integration. Essential [...]

Advancements in Ink-Jet Deposition of Carbon Nanotube Materials for Printed Electronics

Turner S., Brewer Science, US

Advancements in the separation, purification, and post processing of metallic carbon nanotubes are enabling these materials to be used in new printed electronic devices. While CNTs have been researched for over 10 years, recent innovations [...]

A Pressure Sensor Array with Sensing Ragnes Tunable by Drving Frequency

Lai Y.-T., Yang Y-J, National Taiwan University, TW

This work presents the development of a novel pressure sensing array which sensing ranges are tunable during operation. The sensing element consists of carbon nanotubes (CNT) dispersed in nematic liquid crystals composites. The sensing ranges [...]

Design and Fabrication of a Multi-Axis MEMS Force Sensor with Integrated Carbon Nanotube Based Piezoresistors

Cullinan M.A., Panas R.M., Culpepper M.L., Massachusetts Institute of Technology, US

Nanonewton level, multi-axis force sensing is required for many biology, materials science and nanomanufacturing applications. Unfortunately, these requirements are difficult to achieve given the size, sensitivity and fabrication limitations associated with existing small-scale sensing techniques. [...]

New Evidence Towards the Release of Airborne Carbon Nanotubes when Burning Nanocomposite Polymers

Fleury D., R’Mili B., Janes A., Vignes A., Bomfim J.A.S., Sinesi S., Bouillard J.X., INERIS, FR

The combustion of a CNT-filled nanocomposite polymer have been studied thanks to the use of differential thermal analysis coupled to measurement devices (sampling and particle concentration monitoring) to evaluate the potential release of nano-objects in [...]