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

Haydale and Goodfellow Announce Major Distribution Agreement for Functionalised Graphene Materials July 21st, 2014

Relaunch of the Nanoscribe Website New design, optimized research, and impressive gallery of applications July 21st, 2014

Dongbu HiTek Unveils Low-Voltage BCDMOS Process for Efficient Power Management in Smart Phones and Tablet Computers July 21st, 2014

Iran to Host 1st Asian Congress on Nanostructures on Kish Island July 21st, 2014

Discoveries

Oregon chemists eye improved thin films with metal substitution: Solution-based inorganic process could drive more efficient electronics and solar devices July 21st, 2014

Steam from the sun: New spongelike structure converts solar energy into steam July 21st, 2014

More than glitter: Scientists explain how gold nanoparticles easily penetrate cells, making them useful for delivering drugs July 21st, 2014

Carbyne morphs when stretched: Rice University calculations show carbon-atom chain would go metal to semiconductor July 21st, 2014

Announcements

Oxford Instruments Asylum Research Opens an Atomic Force Microscopy Demonstration Lab in Mumbai, India July 21st, 2014

Steam from the sun: New spongelike structure converts solar energy into steam July 21st, 2014

More than glitter: Scientists explain how gold nanoparticles easily penetrate cells, making them useful for delivering drugs July 21st, 2014

Iran to Host 1st Asian Congress on Nanostructures on Kish Island July 21st, 2014

Tools

Dongbu HiTek Unveils Low-Voltage BCDMOS Process for Efficient Power Management in Smart Phones and Tablet Computers July 21st, 2014

Oxford Instruments Asylum Research Opens an Atomic Force Microscopy Demonstration Lab in Mumbai, India July 21st, 2014

Martini Tech Inc. becomes the exclusive distributor for Yoshioka Seiko Co. porous chucks for Europe and North America July 20th, 2014

Sono-Tek Corporation Announces New Clean Room Rated Laboratory Facility in China July 18th, 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