Another Report Laments the Status of Carbon Nanotube Development

With CNT capacity shrinking due to lack of demand, a nanotechnology industry group offers a way forward

2 min read
Illustration: Alamy
Illustration: Alamy

In the last half-a-decade we have witnessed once-beloved carbon nanotubes (CNTs) slowly being eclipsed by graphene as the “wonder material” of the nanomaterial universe.

This changing of the guard has occurred primarily within the research community, where the amount of papers being published about graphene seems to be steadily increasing. But in terms of commercial development, CNTs still have a leg up on graphene, finding increasing use in creating light but strong composites. Nonetheless, the commercial prospects for CNTs have been taking hits recently, with some producers scaling down capacity because of lack of demand.

With this as the backdrop, the National Nanotechnology Initiative (NNI), famous for its estimate back in 2001 that the market for nanotechnology will be worth $1 trillion by 2015, has released a report based on a meeting held last September. The report, called “Realizing the Promise of Carbon Nanotubes: Challenges, Opportunities, and the Pathway to Commercialization,” offers recommendations on the commercialization path for CNTs.

None of the recommendations should come as a surprise to those who have followed the commercial travails of CNTs over the years. While one of the recommendations of the report seemingly incongruously urges the scaling up of CNT production, it would appear the report is recommending a particular kind of increase. The aim of the recommendation is to support a scaled-up manufacturing that would impart the same kind of functionality seen in individual CNTs for CNT-based bulk materials.

Also, for those who measure all nanomaterial research by the degree to which it addresses environmental concerns, the report ticks that box by highlighting the need for life-cycle assessments as products based on CNTs reach commercialization.

Over the years, there has been a regular stream of research that has improved upon CNT production, whether it’s for electronics applications or for advanced composites.

Despite these advances, it doesn’t seem that anyone has been able to translate them into real-world products. That’s why the report contains what has come to be a fixture in any review on the status of nanomaterials: a lamentation of the innovation ecosystem.

It makes perfect sense that the report offers this recommendation: “Use of public-private partnerships or other collaboration vehicles to leverage resources and expertise to solve these technical challenges and accelerate commercialization.”

While urging the creation of a more effective innovation infrastructure is incumbent upon any report dealing with nanotechnology,  it might be time for one of these groups to not only identify the need for it but also to outline what that infrastructure would look like and actually begin buidling it. Until then, we’re likely to see more reports such as these, which tell those who are likely to be paying attention all the things they already know.

The Conversation (0)

3D-Stacked CMOS Takes Moore’s Law to New Heights

When transistors can’t get any smaller, the only direction is up

10 min read
An image of stacked squares with yellow flat bars through them.
Emily Cooper

Perhaps the most far-reaching technological achievement over the last 50 years has been the steady march toward ever smaller transistors, fitting them more tightly together, and reducing their power consumption. And yet, ever since the two of us started our careers at Intel more than 20 years ago, we’ve been hearing the alarms that the descent into the infinitesimal was about to end. Yet year after year, brilliant new innovations continue to propel the semiconductor industry further.

Along this journey, we engineers had to change the transistor’s architecture as we continued to scale down area and power consumption while boosting performance. The “planar” transistor designs that took us through the last half of the 20th century gave way to 3D fin-shaped devices by the first half of the 2010s. Now, these too have an end date in sight, with a new gate-all-around (GAA) structure rolling into production soon. But we have to look even further ahead because our ability to scale down even this new transistor architecture, which we call RibbonFET, has its limits.

Keep Reading ↓Show less