Social Media Sidebar

Announcement

Please sign up, comment on articles and bring your friends!

Current poll

PlanetTech is asking:

What do you think about our new web site?

Love it, indeed
Really good solution
Same as old one
The old one was better
This is a new option

Quote of the day

When seen through the lens of technology, few resources are truly scarce; they’re mainly inaccessible. 

 

Peter Diamandis

3D printing on the micrometer scale

RATE THIS! +3
Posted in Science on 3rd Sep, 2012 01:11 PM by AlexMuller

Three-dimensional printers are popping up everywhere these days. Some are small enough to fit in a briefcase and others are large enough to build print houses, but scientists at the Vienna University of Technology are going for the microscopic. Earlier this year, the university built a 3D printer that uses lasers to operate on a tiny small scale. Now they're refining the technique to enable precise placement a selected molecule in a three-dimensional material. This process, called “3D-photografting,” can potentially be used to create a “lab on a chip” or artificially grow living tissue.

 

Developed by material sciences specialist Prof. Jürgen Stampfl macromolecular chemist Prof. Robert Liska, the 3D-photografting technique is based on a sort of super sponge called hydrogel. This is a network of polymer chains that trap water much in the way that proteins in cooked egg whites do. Hydrogels are over 99 percent water and some varieties look like little transparent blobs.

 

Hydrogels not only trap water, but any other molecules that scientists wish to introduce. If the polymers that make up the hydrogel can be made to coagulate under precise control, they can form a scaffolding for molecules and even living cells.

 

In the Vienna University of Technology 3D-photografting technique, molecules are placed in inside the hydrogel. Then, at the points where the scientists wish to fix a molecule, a laser is focused using a special four-micron lens. Only at that point of focus will the laser be strong enough to break the polymer’s bonds photochemically. This leaves a very reactive spot where the molecule can bond. As the laser moves along, it forms a matrix out of the hydrogel to which can be attached chemical signals, cells or fluorescent molecules.



Read original article » Back to category

Comments

Author: Guest
Posted: 2012-09-03
+1
This could also increase the amount of data storage in a smaller area. Reply


 

Recent headlines

  • Posted in Business on 2017-11-18 21:15:58
    Companies are realising that renewable energy is good for.....read more
    Posted in Hardware on 2017-11-18 21:07:25
    California may reach 50% renewable power goal by 2020; 10.....read more
    Posted in Hardware on 2017-11-17 18:02:34
    Tesla unveils a truck and a roadster..read more
    Posted in Hardware on 2017-11-17 17:47:38
    SpaceX expects government support for development of BFR.....read more
    Posted in Science on 2017-11-17 13:59:11
    Gene therapy infused into persons blood to correct liver.....read more
Posted in Business on 2013-10-10 01:33
China is working towards a manned lunar mission in about.....read more
Posted in Business on 2013-10-20 07:17
Spacex says China is their main competitor for commercial.....read more
Posted in Software on 2013-10-20 06:43
Pirate Bay Browser Clocks 1,000,000 Downloads..read more
Posted in Medicine on 2013-10-10 02:10
Google reportedly investing hundreds of millions into new.....read more
Posted in Medicine on 2013-10-14 03:13
Endothelial Cells Can Repair and Regenerate Organs,.....read more
Posted in Science on 01.01.2010
Spacex says China is their main competitor for commercial.....read more
Posted in Science on 01.01.2010
Staring at Your Phone Could Be Making You Short Sighted..read more
Posted in Science on 01.01.2010
Oculus Rift virtual reality headset coming to mobile, but.....read more
Posted in Science on 01.01.2010
China is working towards a manned lunar mission in about.....read more
Posted in Science on 01.01.2010
Delivering drugs via nanoparticles to target mitochondria..read more

Recent Blog Posts

  • Posted by AlexMuller
    Martian landscapes formed from sand 'levitating' on a little.....read more
    Posted by AlexMuller
    Scientists detect comets outside our solar system..read more
    Posted by AlexMuller
    Advanced artificial limbs mapped in the brain..read more
    Posted by AlexMuller
    Bacteria have a sense of touch..read more
    Posted by AlexMuller
    Recurrent brain cancer: New hope with phase 1 clinical trial.....read more

Login to your Account

Login to your PlanetTech Account here

Username:
Password:
Remember me
or

Create a New Account

You just need username and password

The following errors occured:
Username:
Email:
Password:
Verify password:
Remember me