Developments, contacts, links, literatureDateline Paris, 2015: The cafes and boulevards haven't changed much. However, new invisible materials are now integrated in many everyday objects. Applications include foamed magnesium in lightweight bicycle frames, biocompatible materials in artificial hip joints, nanotechnology for mini fuel cells, notebooks and brightly illuminated displays, and piezofoils that actively control car roof vibrations
I was involved in materials research for more than 40 years. It started back in the 1990s with the discovery of fullerenes. Mon Dieu, that was a new kind of materialsort of like soccer balls made of pure carbon, but a hundred million times smaller. The stuff fascinated an entire generation of chemists. And after some German astrophysicist, who was actually trying to make artificial interstellar dust succeeded in producing a large number of fullerene molecules, well, just about every research institute and university went crazy. We did too. It was really exciting research. And it was only the beginning, because right after that a Japanese scientist invented nanotubestiny cylinders that are also made of carbon, sort of like rolled up graphite. Nanotubes soon replaced fullerenes because you could do a lot more interesting things with them much more easily. Garçon, would you bring me a glass of pastis, please?
You see the man with the notebook at the next table? That ultraflat display he's got is based on nanotubes that are laid out like blades of grass in a field. Each of the tubes is about 1 nm thick and emits an electron beam that excites one pixel on the screen. A nanometer is a billionth of a meterhow about that?
But nanotubes aren't the only new material that have been discovered over the last 20 years. Remember how you used to have to wait for minutes for your computer to boot up? No, you're too young for that. But that's how it was. Man, did that take long! Today you just press a fingertip on an identification sensor that checks to make sure it's really you, and all the programs are onn'est-ce pas? It's the magnetic permanent storage chips that do it. The computer knows exactly what state it was in when the power was turned off. As a result, you don't have to shut down the computer anymore eitherand that was an operation that sometimes took even longer than booting it up.
The really fantastic thing about these new materials is that they're all over the place, but you can't see them because they're hidden. You see that lady over there talking on her cell phone? The phone's powered by a mini fuel cell, and it's got plenty of nanotechnology in it too. Young people don't think about these things anymorethey just stick a methanol cartridge into the phone once every couple of weeks. When I was young, we used to have to drag a battery charger around.
Basically, everything's gotten a lot easier. Look at the bicycle that courier over there has. Just about all the parts are made of nanostructured metal magnesia foam. The stuff weighs practically nothing. But you can't see that when you look at it. It's all on the inside. This nanostructuring concept really did catch on amazingly quickly. I was one of the people who played a role in its development back then. The thing is that a material's ability to withstand stress doesn't change even if you get rid of about half the atomsbut it's got to be the right half, mon Dieu!
The best thing about the new implants is that they adapt to the way they're used over time. Now that's intelligent material! Cars have got that kind of material too. Don't believe me? Well, did you ever wonder why the really expensive cars are so quiet inside? Oh, you've got a cheap car? Well, I'll tell you anyway.
The best thing about the new implants is that they adapt to the way they're used over time. Now that's intelligent material! Cars have got that kind of material too. Don't believe me? Well, did you ever wonder why the really expensive cars are so quiet inside? Oh, you've got a cheap car? Well, I'll tell you anyway.
They're quiet because the roof contains an adaptive mat made of piezo fibers, which are actually ceramic and stretch out or contract when you apply voltage to them. That makes it possible to dampen vibrations. There's a sensor that measures the interior noise level and an electronic control system that stimulates the fibers in a way that neutralizes undesired frequencies. Naturally, the system still lets you listen to the radio or your favorite CD. Amazing, n'est-ce pas?
You want to see a new material that's really visible? Just turn around and look at that billboard outside and the lighting here in the café. It's all LEDs. Just ten years ago it would have been unbelievably expensive to light up an entire room with them. I tell you, the good old light bulb's days are numbered. These LEDs are fantasticthey last forever, can take on all different colors and get by with hardly any electricity. Now that's what I call a real technological revolution! Oh, I've got to go now. It was nice talking to you. Take care of yourself. Au revoir.
Norbert Aschenbrenner
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