Featured Research

from universities, journals, and other organizations

Transforming 'noise' into mechanical energy at nanometric level

Date:
November 22, 2012
Source:
Basque Research
Summary:
Scientists have developed a method that enables efficiently using the random movement of a molecule in order to make a macroscopic-scale lever oscillate.

Transforming ‘noise’ into mechanical energy.
Credit: Image courtesy of Basque Research

A team of researchers at the Freie Universität Berlin, co-ordinated by José Ignacio Pascual*, have developed a method that enables efficiently using the random movement of a molecule in order to make a macroscopic-scale lever oscillate.

The research was published in Science.

In nature, processes such as the movement of fluids, the intensity of electromagnetic signals, chemical compositions, etc., are subject to random fluctuations which normally are called 'noise'. This noise is a source of energy and its utilisation for undertaking a task is a paradigm that nature has shown to be possible in certain cases.

The research led by José Ignacio Pascual and published in Science, focused on a molecule of hydrogen (H2). The researchers placed the molecule within a very small space between a flat surface and the sharp point of an ultra-sensitive atomic force microscope. This microscope used the periodic movement of the point located at the end of a highly sensitive mechanical oscillator in order to 'feel' the forces that exist at a nanoscale level. The molecule of hydrogen moves randomly and chaotically and, when the point of the microscope approaches it, the point hits the molecule, making the oscillator or lever move. But this lever, at the same time, modulates the movement of the molecule, resulting in an orchestrated 'dance' between the point and the 'noisy' molecule. "The result is that the smallest molecule that exists, a molecule of hydrogen, 'pushes' the lever, that has a mass 1019 greater; ten trillion time greater!," explained José Ignacio Pascual.

The underlying principle is a mathematical theory known as Stocastic Resonance which describes how random movements of energy are channelled into periodic movements and, thus, can be harnessed. With this research, it has been shown that this principle is fulfilled at a nanometric scale.

"In our experiment, the 'noise' of the molecule is made by injecting electric current, and not temperature, through the molecule and, thus, functions like an engine converting electric energy into mechanical," stated José Ignacio Pascual. Thus, one of the most promising aspects of this result is that it can be applied to the design of artificial molecules, which are complex molecules designed to be able to oscillate or rotate in only one direction. The authors do not discard, moreover, that this molecular fluctuation can be produced by other sources, such as light, or be carried out with a greater number of molecules, even with different chemical compositions.

*current leader of the Nanoimagen team at CIC nanoGUNE


Story Source:

The above story is based on materials provided by Basque Research. Note: Materials may be edited for content and length.


Journal Reference:

  1. C. Lotze, M. Corso, K. J. Franke, F. von Oppen, J. I. Pascual. Driving a Macroscopic Oscillator with the Stochastic Motion of a Hydrogen Molecule. Science, 2012; 338 (6108): 779 DOI: 10.1126/science.1227621

Cite This Page:

Basque Research. "Transforming 'noise' into mechanical energy at nanometric level." ScienceDaily. ScienceDaily, 22 November 2012. <www.sciencedaily.com/releases/2012/11/121122095313.htm>.
Basque Research. (2012, November 22). Transforming 'noise' into mechanical energy at nanometric level. ScienceDaily. Retrieved July 30, 2014 from www.sciencedaily.com/releases/2012/11/121122095313.htm
Basque Research. "Transforming 'noise' into mechanical energy at nanometric level." ScienceDaily. www.sciencedaily.com/releases/2012/11/121122095313.htm (accessed July 30, 2014).

Share This




More Matter & Energy News

Wednesday, July 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Britain Testing Driverless Cars on Roadways

Britain Testing Driverless Cars on Roadways

AP (July 30, 2014) — British officials said on Wednesday that driverless cars will be tested on roads in as many as three cities in a trial program set to begin in January. Officials said the tests will last up to three years. (July 30) Video provided by AP
Powered by NewsLook.com
Amid Drought, UCLA Sees Only Water

Amid Drought, UCLA Sees Only Water

AP (July 30, 2014) — A ruptured 93-year-old water main left the UCLA campus awash in 8 million gallons of water in the middle of California's worst drought in decades. (July 30) Video provided by AP
Powered by NewsLook.com
Smartphone Powered Paper Plane Debuts at Airshow

Smartphone Powered Paper Plane Debuts at Airshow

AP (July 30, 2014) — Smartphone powered paper airplane that was popular on crowdfunding website KickStarter makes its debut at Wisconsin airshow (July 30) Video provided by AP
Powered by NewsLook.com
U.K. To Allow Driverless Cars On Public Roads

U.K. To Allow Driverless Cars On Public Roads

Newsy (July 30, 2014) — Driverless cars could soon become a staple on U.K. city streets, as they're set to be introduced to a few cities in 2015. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



      Save/Print:
      Share:  

      Free Subscriptions


      Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

      Get Social & Mobile


      Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

      Have Feedback?


      Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
      Mobile iPhone Android Web
      Follow Facebook Twitter Google+
      Subscribe RSS Feeds Email Newsletters
      Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins