Feeds

The nanotube light bulb: bright idea

First major change since Edison

  • alert
  • submit to reddit

New hybrid storage solutions

Chinese scientists working in collaboration with Louisiana State University have demonstrated a light bulb in with a carbon nanotube filament. As well as being the only real change in design in the last 125 years, the nano-filament bulb has several advantages over traditional tungsten.

Firstly, the researchers, lead by Tsinghua University's Jinquan Wei, found that the nano-filament emitted more light than tungsten at the same voltage. It also has a lower threshold for light emission: a mere three volts, as opposed to six for Tungsten. The bulbs still worked after being switched on and off 5000 times, and could operate at 25 volts for more than 360 hours.

The filament also behaves as a precise resistor over a wide temperature range: producing consistent resistance at up to 1750 Kelvin.

The experiment involved replacing the tungsten filament with a highly pure carbon nanotube version. The team made the tubes by chemical vapour deposition. After soaking in alcohol, the tubes self-organise into long filaments. The new filament was sealed, under vacuum, into an ordinary 40 watt bulb.

According to PhysicsWeb, the researchers say that although more work is needed, the bulbs could be commercially available in the next five years. ®

Relates stories

Boffins build room-temperature nano transistor
Europe slips behind on nano technology
DNA-based nanobot takes a stroll

Secure remote control for conventional and virtual desktops

More from The Register

next story
Boffins say they've got Lithium batteries the wrong way around
Surprises at the nano-scale mean our ideas about how they charge could be all wrong
Thought that last dinosaur was BIG? This one's bloody ENORMOUS
Weighed several adult elephants, contend boffins
Chelyabinsk-sized SURPRISE asteroid to skim Earth, satnav birds
Space rock appears out of nowhere, buzzes planet on Sunday
City hidden beneath England's Stonehenge had HUMAN ABATTOIR. And a pub
Boozed-up ancients drank beer before tearing corpses apart
'Duck face' selfie in SPAAAACE: Rosetta's snap with bird comet
Probe prepares to make first landing on fast-moving rock
Archaeologists and robots on hunt for more Antikythera pieces
How much of the world's oldest computer can they find?
prev story

Whitepapers

Providing a secure and efficient Helpdesk
A single remote control platform for user support is be key to providing an efficient helpdesk. Retain full control over the way in which screen and keystroke data is transmitted.
Top 5 reasons to deploy VMware with Tegile
Data demand and the rise of virtualization is challenging IT teams to deliver storage performance, scalability and capacity that can keep up, while maximizing efficiency.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.
Secure remote control for conventional and virtual desktops
Balancing user privacy and privileged access, in accordance with compliance frameworks and legislation. Evaluating any potential remote control choice.