Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Microwave fridges and nano diving boards

Abstract:
NPL scientists are paving the way for highly accurate measurement at the nano-scale and beyond, by being the first team in the world to develop a tiny microwave-powered room-temperature fridge.

Microwave fridges and nano diving boards

UK | Posted on October 8th, 2009

This microwave 'fridge' is unlike the one in your kitchen. Rather than chilling pints of milk, it cools tiny devices called 'micro' or 'nano-scale mechanical resonators' to a decidedly frosty -170 C. It is important to cool down these devices, which look and behave like tiny diving boards (the simplest type of mechanical resonator, with a well-defined resonant frequency, like a tuning fork), so that they can be measured accurately.

Heat is a killer when trying to make an accurate measurement. Any material that is warmer than absolute zero (-273 C) will have atoms moving around inside it, and this makes it very difficult to measure accurately (just as it would be very difficult to weigh a person who was jumping around on the scales).

Now imagine how much easier it would be to weigh the person if they were standing still - this is effectively what NPL has achieved. We have developed a technique that selectively cools down just the property of a sample that needs to be measured. This selective cooling saves an enormous amount of energy, as it means you don't have to waste energy cooling an entire sample when you are only interested in cooling and measuring a tiny fraction of it.

This technique will be of great use in nano-scale and quantum physics as it allows scientists to detect tiny changes in physical factors such as mass, force and displacement by measuring accurately changes in the resonant frequency of the diving board. This means it can be used in applications where highly sensitive detection is needed, such as bio-analytical screening for viruses (by catching a virus on the diving board!). In the longer term this technique could lead to development of even more sensitive 'quantum' diving boards which could be used to examine the really big questions of quantum physics, such as "At what scale do quantum effects break down?".

For more information on this research read 'Excitation, detection, and passive cooling of a micromechanical cantilever using near-field of a microwave resonator', published in the journal Applied Physics Letters 95, 113501 (2009) doi:10.1063/1.3224912 on 16 September 2009.

####

About National Physical Laboratory
As the UKs National Measurement Institute, NPLs mission is:

* Excellence in science
* Increased exploitation of that science to boost UK competitiveness and quality of life
* Integrity and independence as a national asset
* Enhanced international standing

For more information, please click here

Contacts:
Dr Ling Hao
Team Time Quantum and Electromagnetics

Phone +44 20 8943 6296

Copyright © National Physical Laboratory

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Immune system is key ally in cyberwar against cancer: Rice University study yields new two-step strategy for weakening cancer September 23rd, 2014

Los Alamos Researchers Uncover New Properties in Nanocomposite Oxide Ceramics for Reactor Fuel, Fast-Ion Conductors: Misfit dislocations are key to transport properties across material interfaces September 23rd, 2014

Production of Organometallic Frameworks in Least Possible Time September 23rd, 2014

Engineers show light can play seesaw at the nanoscale: Discovery is another step toward faster and more energy-efficient optical devices for computation and communication September 22nd, 2014

Laboratories

Los Alamos Researchers Uncover New Properties in Nanocomposite Oxide Ceramics for Reactor Fuel, Fast-Ion Conductors: Misfit dislocations are key to transport properties across material interfaces September 23rd, 2014

Announcements

Immune system is key ally in cyberwar against cancer: Rice University study yields new two-step strategy for weakening cancer September 23rd, 2014

Los Alamos Researchers Uncover New Properties in Nanocomposite Oxide Ceramics for Reactor Fuel, Fast-Ion Conductors: Misfit dislocations are key to transport properties across material interfaces September 23rd, 2014

Production of Organometallic Frameworks in Least Possible Time September 23rd, 2014

New star-shaped molecule breakthrough: Scientists at The University of Manchester have generated a new star-shaped molecule made up of interlocking rings, which is the most complex of its kind ever created September 22nd, 2014

Quantum nanoscience

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

Elusive Quantum Transformations Found Near Absolute Zero: Brookhaven Lab and Stony Brook University researchers measured the quantum fluctuations behind a novel magnetic material's ultra-cold ferromagnetic phase transition September 15th, 2014

Layered graphene sandwich for next generation electronics September 8th, 2014

Cool Calculations for Cold Atoms: New theory of universal three-body encounters September 2nd, 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