Nanotechnology Now

Our NanoNews Digest Sponsors





Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > Nanotech Speakers Hold Promise for Sonar Uses

Dr. Ali Aliev
Dr. Ali Aliev

Abstract:
Submarines Could Use New Technology to Scan the Depths and Elude Detection

Nanotech Speakers Hold Promise for Sonar Uses

Dallas, TX | Posted on June 14th, 2010

UT Dallas researchers have found that carbon nanotube sheets excel as underwater sound generators and noise-canceling speakers, two highly desirable traits for submarine sonar and stealth capabilities.

Researchers had previously shown that sheets of carbon nanotubes can produce a wall of sound in air, without moving back and forth like traditional speakers. The latest study from the UT Dallas Alan G. MacDiarmid NanoTech Institute, reveals that nanoscience speakers perform as well underwater as they do on land, and that one day they could replace traditional submarine sonar arrays.

The study was published in the American Chemical Society's journal Nano Letters.

Sonar works by generating sound from an underwater speaker and collecting the sound waves that are reflected back to the sub. Sonar operators can determine an object's size, location and speed with sonar data. But, the delicate sonar arrays are expensive, they add to a boat's weight, and they do nothing to reduce a submarine's propeller sounds and other noises as it navigates the seas.

Unlike alcohol or other liquids, water has an interesting effect on carbon nanotubes. The tiny tubes repel water slightly and form a layer of air along their perimeter. Once energized, the thin, light sheets of nanotubes heat and cool incredibly quickly, producing a pressure wave in the air around the nanotube that our ears and other devices perceive as sound.

Led by Dr. Ali Aliev, a research scientist at the NanoTech Institute, the team discovered that nanotubes excel at producing low frequency sound waves, which are ideal for probing the depths of the ocean with sonar. The team also confirmed previous studies noting the ability of nanoscience speakers to cancel noise when tuned to the correct frequency — say, the rumble of a submarine.

"Nanotube sheets can easily be deployed on curved surfaces, like the hull of a sub," Aliev said. "They're very light, about 20 microns thick, and they're 99 percent porous. Layers of nanotube sheets can be built up, each with a different function, for sonar projector applications or for control of the boundary layer losses for marine vehicles. Meaning, periodically heating the skin of a sub—or even an airplane—warms the thin pocket of air around the vehicle and reduces friction and turbulence. Or, these underwater sound generators could cancel out the sonar signal being sent out by another sub, leaving the friendly sub undetected."

####

For more information, please click here

Contacts:
Media Contact
Brandon V. Webb
UT Dallas
(972) 883-2155

Copyright © University of Texas in Dallas

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

Iranian Researchers Present New Model to Strengthen Superconductivity at Higher Temperatures April 19th, 2014

Iranian Researchers Produce New Anti-Cancer Drug from Turmeric April 19th, 2014

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Govt.-Legislation/Regulation/Funding/Policy

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Novel stapled peptide nanoparticle combination prevents RSV infection, study finds April 17th, 2014

INSCX™ exchange to present Exchange trade reporting mechanism for engineered nanomaterials (NMs) to UK regulation agencies, insurers and upstream/downstream users April 17th, 2014

Possible Futures

Virus structure inspires novel understanding of onion-like carbon nanoparticles April 10th, 2014

Local girl does good March 22nd, 2014

Surface Characteristics Influence Cellular Growth on Semiconductor Material March 12th, 2014

The "Tipping Point" February 12th, 2014

Nanotubes/Buckyballs

Effects of Carbon Nanotubes Studied on Pregnant Mothers April 12th, 2014

Nanotech Business Review 2013-2014 April 9th, 2014

Scientists Succeed in Simultaneous Determination of Acetaminophen, Codeine in Drug Samples April 9th, 2014

Rebar technique strengthens case for graphene: Rice University lab makes hybrid nanotube-graphene material that promises to simplify manufacturing April 7th, 2014

Announcements

Iranian Researchers Present New Model to Strengthen Superconductivity at Higher Temperatures April 19th, 2014

Iranian Researchers Produce New Anti-Cancer Drug from Turmeric April 19th, 2014

'Exotic' material is like a switch when super thin April 18th, 2014

Innovative strategy to facilitate organ repair April 18th, 2014

Military

'Exotic' material is like a switch when super thin April 18th, 2014

Tiny particles could help verify goods: Chemical engineers hope smartphone-readable microparticles could crack down on counterfeiting April 15th, 2014

Targeting cancer with a triple threat: MIT chemists design nanoparticles that can deliver three cancer drugs at a time April 15th, 2014

Scalable CVD process for making 2-D molybdenum diselenide: Rice, NTU scientists unveil CVD production for coveted 2-D semiconductor April 8th, 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