Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > News > Nanotube 'springboard' weighs bouncing atoms

July 21st, 2008

Nanotube 'springboard' weighs bouncing atoms

Abstract:
A tiny springboard constructed from a carbon nanotube can weigh individual atoms as they fall onto its surface. The device could replace high-resolution mass spectrometers, which tend to destroy the samples they weigh.

Resonators, materials that naturally oscillate strongly at certain frequencies, help to enhance the sound of many musical instruments.

But physicists also take advantage of resonators to calculate tiny masses. When extra mass lands on the surface of a resonator, it alters the frequency of the resonator, which gives physicists a means to calculate the extra mass.

Existing mass sensors of this kind, however, are constructed from relatively dense materials, such as quartz.

When atoms, which generally have a mass under a zeptogram (a trillionth of a billionth of a gram) land on the quartz, they are too small to make any impression on its vibration frequency. To weigh individual atoms, physicists need a resonator of a much lower density.
Hollow tubes

Kenneth Jensen, Kwanpyo Kim and Alex Zettl at the University of California in Berkeley have discovered that carbon nanotubes are perfect for the task.

Because nanotubes are hollow, they have a mass four orders of magnitude lower than specially built micromachined resonators. That brings their mass into the attogram range (a billionth of a billionth of a gram), and means they respond to single atoms.

Source:
technology.newscientist.com

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

New research points to graphene as a flexible, low-cost touchscreen solution September 19th, 2014

CiQUS researchers design an artificial nose to detect DNA differentiation with single nucleotide resolution September 18th, 2014

Big Results Require Big Ambitions: Three young UCSB faculty receive CAREER awards from the National Science Foundation September 18th, 2014

Biosensors Get a Boost from Graphene Partnership: $5 Million Investment Supports Dozens of Jobs and Development of 300mm Fabrication Process and Wafer Transfer Facility September 18th, 2014

Discoveries

New research points to graphene as a flexible, low-cost touchscreen solution September 19th, 2014

CiQUS researchers design an artificial nose to detect DNA differentiation with single nucleotide resolution September 18th, 2014

Big Results Require Big Ambitions: Three young UCSB faculty receive CAREER awards from the National Science Foundation September 18th, 2014

The Pocket Project will develop a low-cost and accurate point-of-care test to diagnose Tuberculosis: ICN2 holds a follow-up meeting of the Project on September 18th - 19th September 18th, 2014

Announcements

New research points to graphene as a flexible, low-cost touchscreen solution September 19th, 2014

IEEE International Electron Devices Meeting To Celebrate 60th Anniversary as The Leading Technical Conference for Advanced Semiconductor Devices September 18th, 2014

FEI Opens New Technology Center in Czech Republic: FEI expands its presence in Brno with the opening of a new, larger facility September 18th, 2014

Biosensors Get a Boost from Graphene Partnership: $5 Million Investment Supports Dozens of Jobs and Development of 300mm Fabrication Process and Wafer Transfer Facility September 18th, 2014

Tools

IEEE International Electron Devices Meeting To Celebrate 60th Anniversary as The Leading Technical Conference for Advanced Semiconductor Devices September 18th, 2014

FEI Opens New Technology Center in Czech Republic: FEI expands its presence in Brno with the opening of a new, larger facility September 18th, 2014

New NPZ100-403 Piezo Stage from nPoint Inc. September 17th, 2014

Researchers Create World’s Largest DNA Origami September 11th, 2014

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More














ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project







© Copyright 1999-2014 7th Wave, Inc. All Rights Reserved PRIVACY POLICY :: CONTACT US :: STATS :: SITE MAP :: ADVERTISE