Tag: semiconductor

How Quantum Physics will change your life and amaze the world!

 Excerpt from educatinghumanity.com "Anyone not shocked by quantum mechanics has not yet understood it."Niels Bohr10 Ways Quantum Physics Will Change the WorldEver want to have a "life do over", teleport, time travel, have your computer wor...

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Researchers make 32 differently-shaped DNA crystals – is this the future of nanotech?



Researchers have achieved 32 different–shaped crystal structures using the DNA–brick self–assembly method. (Photo : Harvard’s Wyss Institute)

Excerpt from
zmescience.com 

A team at Harvard’s Wyss Institute for Biologically Inspired Engineering demonstrated the latest advances in programmable DNA self-assembly by crystallizing 32 structures with precisely prescribed depths and complex 3D features. The DNA crystals could potentially be used as the basis of a programmable material platform that would allow scientists to build extremely precise and complex structures rivaling the complexity of many molecular machines we see in nature – all from the bottom up!

Nanotechnology like Lego

For the past twenty years or so, there’s been a lot of interest shown into designing large DNA crystals of various desired shapes by exploiting DNA’s inherent ability to self-assemble. We’re recently beginning to see the fruits of this labor, first in 2012 when the same team described their “DNA-brick self-assembly” method that allowed them to build more than 100 3D complex nanostructures about the size of viruses. The 32 designs reported in this latest research are 1000 times larger, close to the size of a speck of dust, which makes them closer to applicable scale where they can be used practically.

With conventional methods of DNA assembly, the resulting design tends to become more and more imperfect as you scale the design because at each step there’s a risk of error. The technique developed at Harvard is different because since it uses short, synthetic strands of DNA that work like interlocking Lego® bricks to build complex structures – it’s a modular design. Each structure first starts off as a computer model of a molecular cube (the master canvas), then individual DNA bricks are removed or added independently until a desired shape is met. These bricks bind to as many as four neighboring strands or bricks. Thus, two bricks connect to one another at a 90-degree angle to form a 3D shape, just like a pair of two-stud Lego bricks. Each individual brick is coded in such a way that they self-assemble in a desired 3-D shape. What’s fantastic is that this method allows for intricate shapes to built on an extremely tiny scale opening up a slew of applications. For instance, a cube built up from 1,000 such bricks (10 by 10 by 10) measures just 25 nanometers in width – thousands of times smaller than the width of a human hair!
“Therein lies the key distinguishing feature of our design strategy—its modularity,” said co-lead author Yonggang Ke, Ph.D., formerly a Wyss Institute Postdoctoral Fellow and now an assistant professor at the Georgia Institute of Technology and Emory University. “The ability to simply add or remove pieces from the master canvas makes it easy to create virtually any design.”

Precision controlled DNA

Most importantly, this modularity allows precision control of the structure’s depth. This is the first time that anyone has been able to design crystal depth with nanometer precision, up to 80 nm, as opposed to  two-dimensional DNA lattices which are typically single-layer structures with only 2 nm depth.
“DNA crystals are attractive for nanotechnology applications because they are comprised of repeating structural units that provide an ideal template for scalable design features”, said co-lead author graduate student Luvena Ong.

 “Peng’s team is using the DNA-brick self-assembly method to build the foundation for the new landscape of DNA nanotechnology at an impressive pace,” said Wyss Institute Founding Director Don Ingber, M.D., Ph.D. “What have been mere visions of how the DNA molecule could be used to advance everything from the semiconductor industry to biophysics are fast becoming realities.”

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#1 Breakthrough: Solid State Generator

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We have finally been given permission to discuss this technology that we consider to be at the very top of our list of emerging clean energy technologies.  Solid state, low (for now) continuous power, commercial in maybe 24 month...

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Aviso’s Free Energy Circuit Revealed

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Ismael Aviso has developed multiple variations of a technology that collects free energy from the ambient environment. Due to a massive number of emails asking for more information, Aviso has posted a series of YouTube videos that pro...

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Victor Klimov FREE-ENERGY System – 100% Proven

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Well, I can think of many other free energy systems that can be weaponized. It's just that Tom Bearden is a retired Lieutenant Colonel, and a military mind always thinks of this possibility.

EagleEyes

Los Alamos...

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PEMM Motor Harnesses Anti-matter and Electron-Avalanche

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Gary Magrattan's PEMM Electric motor is said to harness the phenomenon of electron avalanche across a spark gap to boost current, voltage, and power. A unique method of harnessing back EMF adds to it's novelty as it nears prod...

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The Strange Case of the Rosemary Ainslie Circuit By Steve Windisch

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Posted on December 24, 2009 by dandelionsalad Dandelion Salad December 24, 2009

Recently the Overunity and Energetics online forums (the largest virtual meeting places and “home” for many in the Open Source / “...

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