Featured Research

from universities, journals, and other organizations

Invisibility cloaks and more: Force of acoustical waves tapped for metamaterials

Date:
April 5, 2011
Source:
American Institute of Physics
Summary:
A very simple bench-top technique that uses the force of acoustical waves to create a variety of 3-D structures will benefit the rapidly expanding field of metamaterials and their myriad applications -- including "invisibility cloaks."

These images show microcomputed x-ray tomography renderings of an acoustically engineered nanocomposite metamaterial based on ~5nm-diameter diamond nanoparticles.
Credit: Image courtesy of American Institute of Physics

A very simple bench-top technique that uses the force of acoustical waves to create a variety of 3D structures will benefit the rapidly expanding field of metamaterials and their myriad applications -- including "invisibility cloaks."

Related Articles


Metamaterials are artificial materials that are engineered to have properties not found in nature. These materials usually gain their unusual properties -- such as negative refraction that enables subwavelength focusing, negative bulk modulus, and band gaps -- from structure rather than composition.

By creating an inexpensive bench-top technique, as described in the American Institute of Physics' journal Review of Scientific Instruments, Los Alamos National Lab (LANL) researchers are making these highly desirable metamaterials more accessible.

Their technique harnesses an acoustical wave force, which causes nano-sized particles to cluster in periodic patterns in a host fluid that is later solidified, explains Farid Mitri, a Director's Fellow, and member of the Sensors & Electrochemical Devices, Acoustics & Sensors Technology Team, at LANL.

"The periodicity of the pattern formed is tunable and almost any kind of particle material can be used, including: metal, insulator, semiconductor, piezoelectric, hollow or gas-filled sphere, nanotubes and nanowires," he elaborates.

The entire process of structure formation is very fast and takes anywhere from 10 seconds to 5 minutes. Mitri and colleagues believe this technique can be easily adapted for large-scale manufacturing and holds the potential to become a platform technology for the creation of a new class of materials with extensive flexibility in terms of periodicity (mm to nm) and the variety of materialsthat can be used.

"This new class of acoustically engineered materials can lead to the discovery of many emergent phenomena, understanding novel mechanisms for the control of material properties, and hybrid metamaterials," says Mitri.

Applications of the technology, to name only a few, include: invisibility cloaks to hide objects from radar and sonar detection, sub-wavelength focusing for production of high-resolution lenses for microscopes and medical ultrasound/optical imaging probes, miniature directional antennas, development of novel anisotropic semiconducting metamaterials for the construction of effective electromagnetic devices, biological scaffolding for tissue engineering, light guide, and a variety of sensors.


Story Source:

The above story is based on materials provided by American Institute of Physics. Note: Materials may be edited for content and length.


Journal Reference:

  1. F. G. Mitri, F. H. Garzon, D. N. Sinha. Characterization of acoustically engineered polymer nanocomposite metamaterials using x-ray microcomputed tomography. Review of Scientific Instruments, 2011; 82 (3): 034903 DOI: 10.1063/1.3553207

Cite This Page:

American Institute of Physics. "Invisibility cloaks and more: Force of acoustical waves tapped for metamaterials." ScienceDaily. ScienceDaily, 5 April 2011. <www.sciencedaily.com/releases/2011/04/110405122334.htm>.
American Institute of Physics. (2011, April 5). Invisibility cloaks and more: Force of acoustical waves tapped for metamaterials. ScienceDaily. Retrieved April 25, 2015 from www.sciencedaily.com/releases/2011/04/110405122334.htm
American Institute of Physics. "Invisibility cloaks and more: Force of acoustical waves tapped for metamaterials." ScienceDaily. www.sciencedaily.com/releases/2011/04/110405122334.htm (accessed April 25, 2015).

Share This


More From ScienceDaily



More Matter & Energy News

Saturday, April 25, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

MINI Shows Off Augmented Reality Glasses

MINI Shows Off Augmented Reality Glasses

AP (Apr. 24, 2015) — MINI showcased its new augmented reality glasses at the Shanghai Auto Show this week, which designers say will make roads safer and allow the driver to see through opaque parts of the car. (April 24) Video provided by AP
Powered by NewsLook.com
3D Food Printing: The Meal of the Future?

3D Food Printing: The Meal of the Future?

AP (Apr. 23, 2015) — Developers of 3D food printing hope the culinary technology will revolutionize the way we cook and eat. (April 23) Video provided by AP
Powered by NewsLook.com
'Safest Bike Ever' Devised by British Entrepreneur

'Safest Bike Ever' Devised by British Entrepreneur

Reuters - Innovations Video Online (Apr. 23, 2015) — A British inventor says his Babel bike is the safest bicycle ever produced. Crispin Sinclair - son of famous British inventor Sir Clive Sinclair - hopes the bike&apos;s safety cage, double seatbelt, and host of other measures will inspire non-cyclists to get in the saddle. Jim Drury went to see it in action. Video provided by Reuters
Powered by NewsLook.com
First Successful Aerial Refueling of a Drone

First Successful Aerial Refueling of a Drone

Reuters - Innovations Video Online (Apr. 23, 2015) — The bat-wing U.S. Navy drone that became the first autonomous airplane to take off and land on an aircraft carrier accomplished yet another milestone on Wednesday, becoming the first unmanned aircraft to undergo aerial refueling. Ben Gruber reports. Video provided by Reuters
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:

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

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