Long Nanotubes Grown with Controlled Straightness and Orientation - New Technology

Researchers at Duke University have succeeded in growing one atom thick carbon nanotubes, 100 times longer than usual. They have also been able to grow these nanotubes with controlled straightness and orientation.

Their discovery overcomes a major hurdle to the use of nanotubes in tiny nanoelectronic devices. Further to this, they have also successfully grown checkerboard like grids of nanotubes which could form the basis of nanoelectronic devices.

The researchers grew the nanotubes from tiny catalytic clusters of iron and molybdenum atoms dotted onto a small rectangle of silicon inside a quartz tube. The nanotubes continued to grow along the silicon surface in the same direction of flow as the feed gas of carbon monoxide and hydrogen. These gases were rapidly heated to 900°C, a temperature that would melt normal glass.

Their finding were published in the Journal of the American Chemical Society. At the time of publishing, they believed that their nanotubes were the longest recorded, with lengths as long as 4mm having been produced.

They were also able to grow interconnecting grids by growing nanotubes in a perpendicular direction using suitably flowing gases. These structures could potentially form the basis of nanoelectronic circuitry. Furthermore, the long nanotubes could make the evaporation of multiple metal electrodes on a single nanotube quite simple, allowing multiple devices to be created on the same nanotube.

Posted April 22nd, 2003

Tell Us What You Think

Do you have a review, update or anything you would like to add to this article?

Leave your feedback
Your comment type

While we only use edited and approved content for Azthena answers, it may on occasions provide incorrect responses. Please confirm any data provided with the related suppliers or authors. We do not provide medical advice, if you search for medical information you must always consult a medical professional before acting on any information provided.

Your questions, but not your email details will be shared with OpenAI and retained for 30 days in accordance with their privacy principles.

Please do not ask questions that use sensitive or confidential information.

Read the full Terms & Conditions.