MATERIAL INNOVATIONS: Harnessing the Divas of the Nanoworld

In possession of alluring properties, boron nitride nanotubes are also notoriously temperamental compared to their carbon-based cousins.

Figure 1. Carpets of boron nitride nanotubes grown on a substrate.

Boron nitride nanotubes (BNNTs) are the divas of the nanoworld. In possession of alluring properties, they are also notoriously temperamental compared to their carbon-based cousins. On the plus side, they can withstand high temperatures (well over 1100øC), according to Yoke Khin Yap, an associate professor of physics at Michigan Technological University. "Carbon nanotubes would burn like charcoal in a barbecue at half of those temperatures," he says.

In addition, the electrical properties of BNNTs are remarkably uniform. Perfect insulators, BNNTs could be doped with other materials to form designer semiconductors that could be used in high-powered electronics. Unfortunately, making nanotubes from boron and nitrogen is easier said than done. "Making carbon nanotubes is simpler, like cooking," says Yap.

BNNTs, on the other hand, have always been fussy, requiring special instrumentation, dangerous chemistry or temperatures of over 1500°C to assemble. On top of that, the products are shot through with impurities. "We've been stuck for more than 10 years because nobody could grow them well on substrates," says Yap. "But now we can."

As it turns out, BNNTs just needed a little encouragement. Yap and his team have grown virtual Persian carpets of the tiny fibers on a substrate made from simple catalysts, magnesium oxide, iron or nickel. The process uses the same instrumentation for growing carbon nanotubes (at about 1100°C) and has achieved high-quality results. The boron nitride nanotubes can be made to assemble exclusively on these catalysts, so the researchers can control precisely where they grow (see Figure 1). "I hope this encourages more researchers to grow BNNTs using the new technique," says Yap.

These transparent nanotube sheets have another interesting property: they shed water like a duck's back, a quality known as the lotus effect. "Water just slides away," says Yap. "Anything coated with it would not only be stain resistant, it would be protected from anything water-soluble." This super-hydrophobicity holds at all pH levels, so anything coated with the sheets would be protected from even the strongest acids and alkalis.

The research was funded through a National Science Foundation Career Grant. A paper detailing Yap's discoveries, "Patterned Growth of Boron Nitride Nanotubes by Catalytic Chemical Vapor Deposition," has been published online by Chemistry of Materials. Yap is also the editor of B-C-N Nanotubes and Related Nanostructures, a book detailing nanostructures constructed from one or multiple elements using boron, carbon and nitrogen.

For more information, visit


Did you enjoy this article? Click here to subscribe to Ceramic Industry Magazine.

You must login or register in order to post a comment.



Image Galleries

December 2014 Issue Highlights

Our December 2014 issue is now available! Posted: April 27, 2015.


Ceramics Expo podcast
Editor Susan Sutton discusses the upcoming Ceramics Expo with event director Adam Moore.
More Podcasts

Ceramic Industry Magazine

CI May 2015 cover

2015 May

Our May issue covers bulk batching, pneumatic conveyors, high-temperature furnaces and more! Be sure to check it out today.

Table Of Contents Subscribe

Daily News

We know where you find the latest ceramic industry news (ahem), but where do you catch up on the rest of your daily news?
View Results Poll Archive


M:\General Shared\__AEC Store Katie Z\AEC Store\Images\Ceramics Industry\handbook of advanced ceramics.gif
Handbook of Advanced Ceramics Machining

Ceramics, with their unique properties and diverse applications, hold the potential to revolutionize many industries, including automotive and semiconductors.

More Products

Clear Seas Research

Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications,Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.


facebook_40px twitter_40px  youtube_40pxlinkedin_40google+ icon 40px


CI Data Book July 2012

Ceramic Industry's Directories including Components, Equipment Digest, Services, Data Book & Buyers Guide, Materials Handbook and much more!