Nanotechnology Now

Our NanoNews Digest Sponsors


Heifer International

Wikipedia Affiliate Button


DHgate

Home > News > Nanotube sheets pave way for future flat speakers

November 1st, 2008

Nanotube sheets pave way for future flat speakers

Abstract:
A Chinese research team has moved a step closer to realising flat speakers that will be much cheaper than the existing ones, for they have found that sheets made of carbon nanotubes behave like a loudspeaker when zapped with a varying electric current.

Shoushan Fan and his colleagues at Tsinghua University and Beijing Normal University have become the research team to study the acoustic properties of nanotubes.

For their study, the researchers created a think sheet by roughly aligning many 10-nanometer-diameter carbon nanotubes.

Upon sending an audio frequency current through the sheet, the researchers found that it acted as a loudspeaker.

Fan thinks that the nanotube speaker functions as a thermoacoustic device.

He says when an alternating current passes through it, the nanotube sheet alternates between room temperature and 80 degree Celcius, and such rapid temperature oscillations lead to pressure oscillations in the air next to the film.

Source:
britainnews.net

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related News Press

News and information

Personal cooling units on the horizon April 29th, 2016

Exploring phosphorene, a promising new material April 29th, 2016

Arrowhead Pharmaceuticals Files for Regulatory Clearance to Begin Phase 1/2 Study of ARC-521 April 28th, 2016

The Translational Research Center at the University Hospital of Erlangen in Germany uses the ZetaView from Particle Metrix to quantify extracellular vesicles such as exosomes April 28th, 2016

Nanotubes/Buckyballs/Fullerenes

NREL finds nanotube semiconductors well-suited for PV systems April 27th, 2016

Researchers create artificial protein to control assembly of buckyballs April 27th, 2016

Cleaning up hybrid battery electrodes improves capacity and lifespan: New way of building supercapacitor-battery electrodes eliminates interference from inactive components April 22nd, 2016

Nature Photonics: Light source for quicker computer chips: Waveguide with integrated carbon nanotubes for conversion of electric signals into light / quicker computer chips are feasible / publication in Nature Photonics April 21st, 2016

Discoveries

Personal cooling units on the horizon April 29th, 2016

Exploring phosphorene, a promising new material April 29th, 2016

Nanoparticles hold promise as double-edged sword against genital herpes April 28th, 2016

Researchers create a first frequency comb of time-bin entangled qubits: Discovery is a significant step toward multi-channel quantum communication and higher capacity quantum computers April 28th, 2016

Announcements

Personal cooling units on the horizon April 29th, 2016

Exploring phosphorene, a promising new material April 29th, 2016

Arrowhead Pharmaceuticals Files for Regulatory Clearance to Begin Phase 1/2 Study of ARC-521 April 28th, 2016

The Translational Research Center at the University Hospital of Erlangen in Germany uses the ZetaView from Particle Metrix to quantify extracellular vesicles such as exosomes April 28th, 2016

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







Car Brands
Buy website traffic