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Monday, March 12, 2012

AWESOMENESS! Fast 3D printing with nanoscale precision


Printing three dimensional objects with very fine details using two-photon lithography can now be achieved orders of magnitude faster than similar devices in a breakthrough by Vienna University of Technology (TU Vienna) researchers.

The 3D printing process uses a liquid resin, which is hardened at precisely the correct spots by a focused laser beam. The focal point of the laser beam is guided through the resin by movable mirrors and leaves behind a hardened line of solid polymer a few hundred nanometers wide.

This fine resolution enables the creation of intricately structured sculptures as tiny as a grain of sand. “Until now, this technique used to be quite slow”, says Professor Jürgen Stampfl from the Institute of Materials Science and Technology at the TU Vienna. “The printing speed used to be measured in millimeters per second — our device can do five meters in one second.” In two-photon lithography, this is a world record.

This progress was made possible by combining several new ideas. “It was crucial to improve the steering mechanism of the mirrors,” says Jan Torgersen (TU Vienna). The mirrors are continuously in motion during the printing process. The acceleration and deceleration-periods have to be tuned very precisely to achieve high-resolution results at a record-breaking speed.

Faster printing for large objects too

“The resin contains molecules, activated by the laser light. They induce a chain reaction in other components of the resin, monomers, and turn them into a solid,” says Torgersen. These initiator molecules are only activated if they absorb two photons of the laser beam at once, and this only happens in the very center of the laser beam, where the intensity is highest.

In contrast to conventional 3D-printing techniques, solid material can be created anywhere within the liquid resin rather than on top of the previously created layer only. So the working surface does not have to be specially prepared before the next layer can be produced (see video), which saves a lot of time.

Because of the dramatically increased speed, much larger objects can now be created in a given period of time. This makes two-photon-lithography an interesting technique for industry.

At the TU Vienna, scientists are now developing biocompatible resins for medical applications. They can be used to create scaffolds to which living cells can attach themselves facilitating the systematic creation of biological tissues. The 3d printer could also be used to create tailor made construction parts for biomedical technology or nanotechnology.

Source: Fast 3D printing with nanoscale precision

In the video, a race car with dimensions of 330x130x100µm3 is fabricated. The structure consists of 100 layers, each made of an average of 200 polymer lines. It is finished in 4 minutes and resembles the CAD file at a precision of ±1µm.

High speed fabrication of race car

9 comments:

  1. 3d bioprinting = Immortality = go to stars

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  2. ...3D Bioprinting-Immortality (mom-printer)...on wake up, but...if I am, when I was 18 years old...and still so I remember all my Life in the ancient body before... On the body the important is the head, in the head the important is the brain, in the brain the important is...the Memory...which is, along with Genes and Image, simply, what we are. Your recorded Memory to the new, young, perfect, identical bioprinted body and...Immortality...already the accidents do not matter. The Memory is the "soul" (software), our body only is the "automobile" that transport us (hardware). (But...is that..."it" already would be not "Me", it would be a "cyborg/clone/avatar/frankenstein". Are you sure?, because to sleep, loses consciousness, "it" disappears every night (dies)...and wake up "it" appears every morning (rebirths)...and our MEMORY instantly auto-recognizes us, the same in our own original body which in our new body... If we would have lost the Memory...we would have lost the Life).

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  5. ...future travel (without false freedom)... Silence is golden?..."rossse-tie" passive homo-vice, "bluesss skysss-tie" active homo-vice from the "facestifffinger". The apostles of the inhuman homo-vice, with their propagator acolytes "maricones" and "tortilleras" in news TV installed announcing "happy" their days of "pride", infecting colors, numbers, words... Nobody yet perceives what it pretend the fetid homo-vices ("maricones") with from technology use degenerated: go artificially pregnant and throw their "sons" by where go out the fetid excrement to that unworthy and horrible ill world, a world without women where nobody will can live with dignity. Homo-vices, religious, have the control of all Global Media: Internet, TV, radio, movies, newspapers...see, besides of look, constantly in Hollywood-movies, South American TV-novels and TV programs role of evilness against beautiful innocent actress, role of "goodness" for man-actor, violence, crime and insults against women, for that after will be reality passing from fiction to real life (what´s to see, is what´s to do). And nobody in the entire World says anything, nor do people, nor do politicians, nor do nobody. Only hypocrisy and lies and silence, with "marymales" occupying almost each National Presidency reclaiming "free sex orientation"...because if anybody says anything does not can have a job, or something worse... Silence is golden?, NOT. It´s time for to say the truth, for the wellness of Future´s Humankind.

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  6. Meanwhile the World looks to elsewhere... Giant HORNETS...are threatening to all Humankind...it is necessary that the human beings, instead of destroy among them, destroy to those dangerous insects of huge exponential growing...seriously beginning already, at present.

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  7. ...3D Bioprinting-Immortality (biological timers)... Forever young with modified Biological Timers...which are the biological timers?, where are them? (genes, hypothalamus...), how functioning them?, how can modify them (telomerase...) for maintenance the hormones production, enzymes, cellular regeneration...all Eternity at same level of the 18 years old?... Have to accelerate Research about Memory and the Space´s Colonization... Immortality comes...

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    1. Nobel Prize physiology 2017...about biological timers...

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