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Latest Selective chemistry of single-walled nanotubes Stories

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2010-07-08 14:33:06

Metallic carbon nanotubes show great promise for applications from microelectronics to power lines because of their ballistic transmission of electrons. But who knew magnets could stop those electrons in their tracks? Rice physicist Junichiro Kono and his team have been studying the Aharonov-Bohm effect -- the interaction between electrically charged particles and magnetic fields -- and how it relates to carbon nanotubes.  While doing so, they came to the unexpected conclusion that...

2009-09-20 13:13:27

Case Western Reserve University researchers find mixing different metals in a catalyst can help determine structure, function Nanoscopic tubes made of a lattice of carbon just a single atom deep hold promise for delivering medicines directly to a tumor, sensors so keen they detect the arrival or departure of a single electron, a replacement for costly platinum in fuel cells or as energy"saving transistors and wires. Single"walled carbon nanotubes, made of a cheap and...

2009-05-19 09:18:06

U.S. scientists say they have developed a chemical functionalization technology that will allow graphene to be used in a wide range of technologies. Graphene is an atomically thin sheet of carbon that has potential use in high-performance electronics. And while the physics of graphene is well understood, chemical functionalization of graphene has proved elusive. Functionalization is a process that binds molecules to the carbon atoms of a nanotube to allow the blending of nanotubes into...

2009-02-10 15:04:41

U.S. scientists say they've been able to increase the current-carrying capacity of carbon nanotubes to a level previously thought impossible to achieve. University of Illinois researchers said they used an avalanche process that carries more electrons down more paths, similar to the way a multilane highway carries more traffic than a one-lane road. Single-wall carbon nanotubes are already known to carry current densities up to 100 times higher than the best metals like copper, said Professor...

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2009-02-09 14:24:22

By pushing carbon nanotubes close to their breaking point, researchers at the University of Illinois have demonstrated a remarkable increase in the current-carrying capacity of the nanotubes, well beyond what was previously thought possible. The researchers drove semiconducting carbon nanotubes into an avalanche process that carries more electrons down more paths, similar to the way a multilane highway carries more traffic than a one-lane road. "Single-wall carbon nanotubes are already known...

2005-07-29 15:08:49

PHILADELPHIA --  Physicists at the University of Pennsylvania have overcome a major hurdle in the race to create nanotube-based electronics.  In an article in the August issue of the journal Nature Materials, available online now, the researchers describe their method of using nanotubes tiny tubes entirely composed of carbon atoms -- to create a functional electronic circuit.  Their method creates circuits by dipping semiconductor chips into liquid suspensions of carbon...


Word of the Day
negawatt
  • A unit of saved energy.
Coined by Amory Lovins, chairman of the Rocky Mountain Institute as a contraction of negative watt on the model of similar compounds like megawatt.