Lighter & Stronger Than Steel

Researchers from the University of Connecticut and colleagues have created a highly durable, lightweight material by structuring DNA and then coating it in glass. The resulting product, characterized by its nanolattice structure, exhibits a unique combination of strength and low density, making it potentially useful in applications like vehicle manufacturing and body armor. (Artist’s concept.)






Researchers have developed a highly robust material with an extremely low density by constructing a structure using DNA and subsequently coating it in glass.

Materials possessing both strength and lightness have the potential to enhance everything from automobiles to body armor. But usually, the two qualities are mutually exclusive. 

However, researchers at the University of Connecticut, along with their collaborators, have now crafted an incredibly strong yet lightweight material. Surprisingly, they achieved this using two unexpected building blocks: DNA and glass.

“For the given density, our material is the strongest known,” says Seok-Woo Lee, a materials scientist at UConn. Lee and colleagues from UConn, Columbia University, and Brookhaven National Lab report the details on July 19 in Cell Reports Physical Science.

Strength is relative. Iron, for example, can take 7 tons of pressure per square centimeter. But it’s also very dense and heavy, weighing 7.8 grams/cubic centimeter. Other metals, such as titanium, are stronger and lighter than iron. 

And certain alloys combining multiple elements are even stronger. Strong, lightweight materials have allowed for lightweight body armor, better medical devices, and made safer, faster cars and airplanes.  READ MORE...

Reliance on Fossil Fuels

Modern societies would be impossible without mass-scale production of many man-made materials. We could have an affluent civilization that provides plenty of food, material comforts, and access to good education and health care without any microchips or personal computers: we had one until the 1970s, and we managed, until the 1990s, to expand economies, build requisite infrastructures and connect the world by jetliners without any smartphones and social media. 

But we could not enjoy our quality of life without the provision of many materials required to embody the myriad of our inventions.  Four materials rank highest on the scale of necessity, forming what I have called the four pillars of modern civilization: cement, steel, plastics, and ammonia are needed in larger quantities than are other essential inputs. 

The world now produces annually about 4.5 billion tons of cement, 1.8 billion tons of steel, nearly 400 million tons of plastics, and 180 million tons of ammonia. But it is ammonia that deserves the top position as our most important material: its synthesis is the basis of all nitrogen fertilizers, and without their applications it would be impossible to feed, at current levels, nearly half of today’s nearly 8 billion people.

The dependence is even higher in the world’s most populous country: feeding three out of five Chinese depends on the synthesis of this compound. This dependence easily justifies calling ammonia synthesis the most momentous technical advance in history: other inventions provide our comforts, convenience or wealth or prolong our lives—but without the synthesis of ammonia, we could not ensure the very survival of billions of people alive today and yet to be born.  READ MORE...