The tendency in electronic devices is all about getting smaller and smaller and smaller. It’s just the way these things need to be. However, they also have to be very efficient and we have nanotechnology and carbon nanotubes to make them like this. In order to develop smaller and more efficient electronics, scientists want to develop the next generation of devices based on carbon nanotubes using a technique called “chemical vapor deposition”, but it’s very hard to manipulate these structures and to bring them to a useful state.
A new vision is needed to complete the next-gen electronics and thanks to a breakthrough from scientists at the University of Nebraska-Lincoln, our future devices could be built from carbon nanotubes. The team of scientists led by professor Yongfeng Lu and postdoctoral researcher Yunshen Zhou, used a technique based on the so-called “optical near-field effects” and they managed to control the growth of carbon nanotubes. The researchers linked individually self-aligned carbon nanotubes with sharp-tipped electrodes, a process which is very different from previous techniques where the carbon nanotubes were manipulated after growth.
“With our method, there’s no requirement for expensive instrumentation and no requirement for tedious processes. It’s a one-step process. We call it ’self-aligning growth.’ The carbon nanotubes ‘know’ where to start growth. In previous efforts, they could only manipulate carbon nanotubes one piece at a time, so they had to align the carbon nanotubes one by one. For our approach using optical near-field effects, all locations with sharp tips can accommodate carbon nanotube growth. That means we can make multiple carbon nanotubes at a time and all of them will be self-aligned,” said professor Lu.