Feeds

Oz nanoboffins punt paper-thin flak jacket plan

Some kind of Robocop involvement. And geckoes, of course

Application security programs and practises

Astounding news from Australia today, as it appears that yet another unbelievable movie themed breakthrough has been made in gecko-related nanotech.

This time, the flick ligged by ink-thirsty boffins is Robocop, rather than Spiderman or The Incredibles.

Sadly, we aren't talking here about brains plucked from slain hero cops being implanted into invulnerable robot bodies packing pop-up automatic weapons.

"Bulletproof jackets do not turn security guards, police officers and armed forces into Robocops," says a release from the Institute of Physics (IOP), which is publishing the Oz research in question.

No shit. But wait:

"New research in carbon nanotechnology however... can bounce bullets without a trace of damage... carbon nanotubes... not only stop bullets... but actually rebound their force... engineers in Sydney have undertaken experiments to find... the most effective bullet-bouncing gear."

Crikey. How does it work?

"Nanotubes bind together... because of the Van der Waals force... used... by geckoes when they stick to a ceiling."

OK, so there's no actual robocop action going on here. But we might have some kind of amazing gecko-tech nanotube vest off which bullets will bounce harmlessly.

According to the IOP publicists, regular old crappy flak jackets made of "Kevlar, Twaron or Dyneema" are rubbish.

"Targets can still be left suffering blunt force trauma - perhaps severe bruising or, worse, damage to critical organs," they say.

But bleeding-edge Antipodean research could change all that.

"The dynamic properties of the materials we have found means that a bullet can be repelled with minimum or no damage to the wearer of a bullet proof vest," according to Sydney-based engineering boffins Prof Liangchi Zhang and Dr Kausala Mylvaganam.

For the full details, go here (pdf).

"The best material for body armour should have a high level of elastic storage energy that will cause the bullet to bounce off," say Zhang and Mylvaganam.

"This study estimates, though based on a very strong assumption, that body armour... could bounce off a bullet with a muzzle energy of 320 J."

Actually that's fairly poor. If you believe famous Russian gun nut Max Popenker's stats the nanogecko vest won't even stop ordinary 9mm and .45 pistol rounds. It certainly wouldn't cope against anything saucy like .357 magnum, or God forbid the ridiculous .50 Desert Eagle hand-cannon ammo favoured by movie figures such as Bullet-tooth Tony (Snatch) and Agent Smith (Matrix trilogy). As for rifle bullets - not a chance. The nanotube vest might do against pocket pistols - .22, .32, 9mm short - but nothing more. Assuming it needs to bounce the bullets to work, at least.

On the other hand, Zhang and Mylvaganam reckon their 320-J-bouncer armour would be only a tad over half a millimetre thick. Presumably, heftier stuff would bounce pokier bullets.

But the most troublesome part is the idea that bouncing a bullet is better than just stopping it. Conservation of momentum would seem to mean that bullets which bounce off at any speed would impart a larger impulse to the target than ones which simply stop. If the nanogecko armour is a rigid plate which doesn't deform on being hit, that might not be a problem; but the comparison with kevlar suggests half-millimetre, fairly flexible fabric from which bullets will bounce.

The IOP says it is "devoted to increasing the understanding and application of physics." It doesn't seem to be doing a brilliant job in this instance. ®

Build a business case: developing custom apps

More from The Register

next story
Just TWO climate committee MPs contradict IPCC: The two with SCIENCE degrees
'Greenhouse effect is real, but as for the rest of it ...'
BEST BATTERY EVER: All lithium, all the time, plus a dash of carbon nano-stuff
We have found the Holy Grail (of batteries) - boffins
Asteroid's DINO KILLING SPREE just bad luck – boffins
Sauricide WASN'T inevitable, reckon scientists
Flamewars in SPAAACE: cooler fires hint at energy efficiency
Experiment aboard ISS shows we should all chill out for cleaner engines
The Sun took a day off last week and made NO sunspots
Someone needs to get that lazy star cooking again before things get cold around here
Boffins discuss AI space program at hush-hush IARPA confab
IBM, MIT, plenty of others invited to fill Uncle Sam's spy toolchest, but where's Google?
Famous 'Dish' radio telescope to be emptied in budget crisis: CSIRO
Radio astronomy suffering to protect Square Kilometre Array
prev story

Whitepapers

Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
Application security programs and practises
Follow a few strategies and your organization can gain the full benefits of open source and the cloud without compromising the security of your applications.
How modern custom applications can spur business growth
Learn how to create, deploy and manage custom applications without consuming or expanding the need for scarce, expensive IT resources.
Securing Web Applications Made Simple and Scalable
Learn how automated security testing can provide a simple and scalable way to protect your web applications.