Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

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

A big nano boost for solar cells: Kyoto University and Osaka Gas effort doubles current efficiencies January 21st, 2017

A toolkit for transformable materials: How to design materials with reprogrammable shape and function January 20th, 2017

Explaining how 2-D materials break at the atomic level January 20th, 2017

New research helps to meet the challenges of nanotechnology: Research helps to make the most of nanoscale catalytic effects for nanotechnology January 20th, 2017

Discoveries

A big nano boost for solar cells: Kyoto University and Osaka Gas effort doubles current efficiencies January 21st, 2017

A toolkit for transformable materials: How to design materials with reprogrammable shape and function January 20th, 2017

Explaining how 2-D materials break at the atomic level January 20th, 2017

New research helps to meet the challenges of nanotechnology: Research helps to make the most of nanoscale catalytic effects for nanotechnology January 20th, 2017

Announcements

A big nano boost for solar cells: Kyoto University and Osaka Gas effort doubles current efficiencies January 21st, 2017

A toolkit for transformable materials: How to design materials with reprogrammable shape and function January 20th, 2017

New research helps to meet the challenges of nanotechnology: Research helps to make the most of nanoscale catalytic effects for nanotechnology January 20th, 2017

Ultra-precise chip-scale sensor detects unprecedentedly small changes at the nanoscale January 20th, 2017

Tools

Chemists Cook up New Nanomaterial and Imaging Method: Nanomaterials can store all kinds of things, including energy, drugs and other cargo January 19th, 2017

Nanometrics to Announce Fourth Quarter and Full Year Financial Results on February 7, 2017 January 19th, 2017

Distinguishing truth under the surface: electrostatic or mechanic December 31st, 2016

Nanomechanics Inc. Continues Growth in Revenue and Market Penetration: Leading nanoindentation company reports continued growth in revenues and distribution channels on national and international scales December 27th, 2016

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