Nanotechnology Now

Our NanoNews Digest Sponsors



Heifer International

Wikipedia Affiliate Button


android tablet pc

Home > Press > The Sounds of Nanoscience

The nanotube device (above)
use  a principle first identified by Alexander Graham Bell. “They have no moving parts and can be attached to any surface,” said Dr. Mikhail Kozlov.
The nanotube device (above) use a principle first identified by Alexander Graham Bell. “They have no moving parts and can be attached to any surface,” said Dr. Mikhail Kozlov.

Abstract:
Carbon Nanotube Speakers Could Be Powered by Lasers, Blend into Windows and Transform Noisy Spaces into Peaceful Sanctums

The Sounds of Nanoscience

Richardson, TX | Posted on March 11th, 2010

A UT Dallas team's study published in the Journal of Applied Physics expands the extraordinary capabilities of nanotechnology to include laser-powered acoustic speakers made from assemblies of carbon nanotubes.

The study confirms earlier research that carbon nanotubes that are stretched into sheets and electrically powered can produce intense sound, but researchers at UT Dallas' Alan G. MacDiarmid NanoTech Institute have made some important advancements.

Although prior studies demonstrated that sheets of carbon nanotubes can produce sound when heated with alternating electrical current, the UT Dallas researchers have found that striking tones can be generated by vertical arrays of nanotubes, called forests, which resemble black velvet.

The team also discovered that high-quality sound can be generated when nanotube sheets or forests are struck with laser light that is modulated, or "altered," in the acoustic frequency range.

"Nanotubes assemblies of various types are black and highly conductive," said Dr. Mikhail Kozlov, a research scientist and the study's lead author. "Their dark, conductive surface can be effectively heated with laser light or electricity to induce variations in the pressure of the air around the nanotubes — which we perceive as sound. It's called the photo- or thermo-acoustic effect, and it's the same principle Alexander Graham Bell used to produce sound on the first telephone."

With laser excitation, no electrical contact with the nanotube speaker is required, making the speakers wireless.

"Speakers made with carbon nanotube sheets are extremely thin, light and almost transparent," Kozlov said. "They have no moving parts and can be attached to any surface, which makes the surface acoustically active. They can be concealed in television and computer screens, apartment walls, or in the windows of buildings and cars. The almost invisible strands form films that can ‘talk.'"

In addition to filling a room with sound from invisible speakers, nanotube speakers could easily cancel sound from the noisiest neighbor or dim the roar of traffic rushing past a neighborhood, using the same principles as current sound-canceling technologies.

"The sound generation by nanotube sheets can help to achieve this effect on very large scales," Kozlov said.

Carter Haines, a senior physics major, co-authored the journal article and assisted in putting the nanotube speakers through their paces. He is a former George A. Jeffrey NanoExplorer, who conducted research at the NanoTech Institute while in high school. He has continued to perform research in the lab as an undergraduate.

"Hands-on research like this is very important to me," Haines said. "We had to put together the test set-up from scratch. I've enjoyed tinkering with small projects on my own, but the resources and the source of direction NanoTech offers allows me to explore science on a whole different level."

Along with Kozlov and Haines, the NanoTech research team included:

* Dr. Jiyoung Oh, research associate.
* Dr. Marcio Lima, research associate.
* Dr. Shaoli Fang, associate research professor.

In addition to demonstrating that forests and sheets of nanotubes can generate sound, the team took a number of capability measurements to add to the growing list of characteristics, or properties, scientists can use in future studies. Such characterizations are especially important in new areas of research and serve as platforms of knowledge, built layer by layer, from projects like this.

Haines expressed a sentiment familiar to all researchers upon learning the journal article had been published.

"On the one hand, it's rewarding to see something I worked on get recognized and published," Haines said. "On the other hand, I know this is just one small thing, and if anything, it serves to remind me how much more there is to be done."

####

For more information, please click here

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

or the Office of Media Relations, UT Dallas
(972) 883-2155

Copyright © UT 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

Arrowhead to Present at BioCentury's NewsMakers in the Biotech Industry Conference September 19th, 2014

SouthWest NanoTechnologies (SWeNT) Receives NIST Small Business Innovation Research (SBIR) Phase 1 Award to Produce Greater than 99% Semiconducting Single-Wall Carbon Nanotubes September 19th, 2014

Toward optical chips: A promising light source for optoelectronic chips can be tuned to different frequencies September 19th, 2014

New research points to graphene as a flexible, low-cost touchscreen solution September 19th, 2014

Possible Futures

Air Force’s 30-year plan seeks 'strategic agility' August 1st, 2014

IBM Announces $3 Billion Research Initiative to Tackle Chip Grand Challenges for Cloud and Big Data Systems: Scientists and engineers to push limits of silicon technology to 7 nanometers and below and create post-silicon future July 10th, 2014

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

Local girl does good March 22nd, 2014

Academic/Education

Biosensors Get a Boost from Graphene Partnership: $5 Million Investment Supports Dozens of Jobs and Development of 300mm Fabrication Process and Wafer Transfer Facility September 18th, 2014

Malvern technology delivers Malvern reliability in multi-disciplinary lab at Queen Mary University London September 9th, 2014

State University of New York Trustees Unanimously Approve SUNY Polytechnic Institute (SUNY Poly) as New Name for Merged SUNY CNSE / SUNYIT September 9th, 2014

New Vice President Takes Helm at CNSE CMOST: Catherine Gilbert To Lead CNSE Children’s Museum of Science and Technology Through Expansion And Relocation August 29th, 2014

Nanotubes/Buckyballs

SouthWest NanoTechnologies (SWeNT) Receives NIST Small Business Innovation Research (SBIR) Phase 1 Award to Produce Greater than 99% Semiconducting Single-Wall Carbon Nanotubes September 19th, 2014

Scientists refine formula for nanotube types: Rice University theorists determine factors that give tubes their chiral angles September 17th, 2014

‘Small’ transformation yields big changes September 16th, 2014

Rice rolls 'neat' nanotube fibers: Rice University researchers' acid-free approach leads to strong conductive carbon threads September 15th, 2014

Announcements

Arrowhead to Present at BioCentury's NewsMakers in the Biotech Industry Conference September 19th, 2014

SouthWest NanoTechnologies (SWeNT) Receives NIST Small Business Innovation Research (SBIR) Phase 1 Award to Produce Greater than 99% Semiconducting Single-Wall Carbon Nanotubes September 19th, 2014

Toward optical chips: A promising light source for optoelectronic chips can be tuned to different frequencies September 19th, 2014

New research points to graphene as a flexible, low-cost touchscreen solution September 19th, 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