Q: Paper or Plastic for Carbon Nanotubes? A: Paper

Carbon nanotube ink and paper make for a simple energy storage device

1 min read

It is appealing when an engineering solution takes a step back, technologically speaking. Or so how it might be described as researchers at Stanford University have developed a way to make batteries and supercapacitors by spreading a liquid concoction of carbon nanotubes and silver nanowires onto simple paper rather than plastic.

Stanford researcher Yi Cui’s work entitled "Highly Conductive Paper for Energy Storage Devices" has been published in the Proceedings of the National Academy of Sciences this week.

While the simplicity of making these batteries is evidenced in the video below, we may be a long way from seeing machines such as implantable medical devices employing the technology as some publications have suggested when we have carbon nanotubes and silver nanoparticles under scrutiny for their toxicological issues.

Nonetheless it is fun to watch how something so simple can be used for storing and discharging energy.


[youtube https://www.youtube.com/v/QPTcQJPbGHw&hl=en_GB&fs=1& expand=1]
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The Transistor of 2047: Expert Predictions

What will the device be like on its 100th anniversary?

4 min read
Six men and a woman smiling.

The luminaries who dared predict the future of the transistor for IEEE Spectrum include: [clockwise from left] Gabriel Loh, Sri Samavedam, Sayeef Salahuddin, Richard Schultz, Suman Datta, Tsu-Jae King Liu, and H.-S. Philip Wong.


The 100th anniversary of the invention of the transistor will happen in 2047. What will transistors be like then? Will they even be the critical computing element they are today? IEEE Spectrum asked experts from around the world for their predictions.

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