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Showing Spotlights 33 - 40 of 304 in category Carbon Nanotubes (newest first):


In situ monitoring catalytic processes for ultrahigh purity carbon nanotubes

carbon_nanotubesCatalysis is one of the most important routines for the production of nanomaterials. The catalysts that are used in these processes play a vital role for the controllable fabrication of nanomaterials with anticipated structures. However, carbon nanotubes grown through routine catalytic chemical vapor deposition have always shown non-carbon impurities. Effective purification of SWCNTs has therefore attracted significant attention from researchers around the world in order to improve the performance of carbon nanotubes, especially in energy storage systems.

Posted: Oct 30th, 2013

Nanotechnology for implantable sensors

Thanks to nanotechnology, medical research is moving quickly towards a future where intelligent medical implants can continuously monitor their condition inside the body and autonomously respond to changes such as infection by releasing anti-inflammatory agents. A recent review discusses present and prospective implantable sensors incorporating nanostructured carbon allotropes. The authors describe various applications with an in-depth look at the implantable sensors from the viewpoints of nanomedicine, materials science, nanobiotechnology, and sensor design, both present and future.

Posted: Sep 5th, 2013

Detecting neurotransmitters in live brain tissue with carbon nanotube electrodes

brainConventional carbon-fiber electrodes have been the material of choice for identifying the chemical nature of neurotransmitters in the brain. Unfortunately, they have some limitations that leave some of the molecules that researchers are interested in just out of our reach. Further miniaturization of biologically compatible, carbon based electrode materials to the nanoscale promises to enhance the very characteristics that made microelectrodes so transformative in the first place, enabling high speed measurements in discrete spatial locations.

Posted: Sep 3rd, 2013

Nanotechnology T-Shirt to replace batteries? Towards wearable energy storage

carbon_nanotube_fiberIn new work, researchers have demonstrated that flexible cotton threads can be used as a platform to fabricate a cable-type supercapacitor. Wearable electronics will go far beyond just very small electronic devices or wearable, flexible computers. Not only will these devices be embedded in textile substrates but an electronics device or system could ultimately become the fabric itself. Supercapacitors with a cable-type architecture could lead to flexible energy storage devices that can remove traditional restriction and achieve a subversive technology that could open up a path for design innovation.

Posted: Aug 29th, 2013

Novel CNT-copper nanocomposite delivers a 100-fold increase in current density

nanocompositeWith the semiconductor industry still on the path of Moore's law, researchers have already been toying with single-molecule electronics and molecular memory to push miniaturization of electronics to its limit. However, with electrical gadgets and devices getting increasingly smaller and functionally more powerful, the current density flowing through the copper and gold conductors in these devices has been exponentially increasing. Therefore, electrical conductors with higher current density tolerance are in huge demand and recent research has addressed this issue.

Posted: Aug 6th, 2013

A sustainable nanotechnology design for micro-sized microbial fuel cells

microbesMicrobial fuel cells are a prime example of environmental biotechnology that turns the treatment of organic wastes into a source of electricity. In microbial fuel cells, the naturally occurring decomposing pathways of electrogenic bacteria are used to both clean water and produce electricity by oxidizing biological compounds from wastewater and other liquid wastes, even urine. Researchers have now demonstrated a sustainable and practical design for a micro-sized microbial fuel cell.

Posted: Aug 1st, 2013

Visualization and manipulation of carbon nanotubes under an optical microscope

carbon_nanotubesDirect visualization and manipulation of individual carbon nanotubes (CNTs) in ambient conditions is of great significance for their characterizations and applications. However, the direct visualization, location, and manipulation of individual CNTs is extremely difficult due to their nanoscale diameters. The observation of individual CNTs usually requires electron microscopes under high vacuum. Researchers now have proposed a facile way to realize optical visualization of individual carbon nanotubes and, based on that, macroscale manipulation of individual carbon nanotubes that could be carried out under an optical microscope.

Posted: Jul 22nd, 2013

Probing single-molecule magnets with carbon nanotube NEMS

nanomagnetElectronics will undergo revolutionary changes as the relatively novel disciplines of spintronics, nanoelectronics, and quantum computing come of age. A fundamental link between these fields can be established using molecular magnetic materials and, in particular, single-molecule magnets. Researchers have now demonstrated how to noninvasively graft a single-molecule magnet onto a carbon nanotube nanoelectromechanical system and probe the molecular nanomagnet with the carbon nanotube's mechanical motion.

Posted: Jul 19th, 2013