Even the strongest artificial glues are completely useless when you try to apply them underwater, but somehow shellfish are able to hold fast to rocks to deter predators from trying to carry them away. Clearly, nature has already figured out how to make glues that work underwater, and now researchers may have discovered the secret.
Controlling the organization of nanoparticles into patterns in ultrathin polymer films can be accomplished with entropy instead of chemistry, according to a discovery by Dr. Alamgir Karim, UA’s Goodyear Tire and Rubber Company Professor of Polymer Engineering, and his student Dr. Ren Zhang. Polymer thin films are used in a variety of technological applications, for example paints, lubricants, and adhesives. Karim and Zhang have developed an original method—soft-confinement pattern-induced nanoparticle segregation (SCPINS)—to fabricate polymer nanocomposite thin films with well-controlled nanoparticle organization on a submicron scale. This new method uniquely controls the organization of any kind of nanoparticles into patterns in those films, which may be useful for applications involving sensors, nanowire circuitry or diffraction gratings, with proper subsequent processing steps like thermal or UV sintering, that are likely required but the self-organization into directed patterns.
This work, “Entropy-driven segregation of polymer -grafted nanoparticles under confinement,” has been published in the February 2017 issue of Proceedings of the National Academy of Sciences (PNAS).
Intuitively, entropy is associated with disorder of a system. However, for colloidal matter, it has been shown that a system can experience transitions which increase both entropy and visible order. Inspired by this observation, Karim and Zhang investigated the role of entropy in directed organization of polymer-grafted nanoparticles (PGNPs) in polymer thin films. By simply imprinting the blend films into patterned mesa-trench regions, nanoparticles are spontaneously enriched within mesas, forming patterned microdomain structures which coincide with the topographic pattern. This selective segregation of PGNPs is induced by entropic penalty due to the alteration of the grafted chain conformation when confined in ultrathin trench regions.
My new 10-min interview on one of Ireland’s largest talk shows (120,000 listeners). Some of the questions are tough to answer as I strive to protect those in hardship, promote equality, and still remain true to my #libertarian values. Lots of core #transhumanism in this interview.
Zoltan Istvan is a transhumanist who is running for Governor of California. He spoke to Sean about his beliefs that centre around technology and science helping humans.
Show: Moncrieff
DETROIT (AP) — Computer chip maker Intel paid handsomely for a piece of the next big thing Monday as it offered more than $15 billion for Mobileye, an Israeli company at the forefront of autonomous vehicle technology.
The purchase, scheduled to close by year’s end, creates another major player in self-driving technology as traditional automakers and tech companies vie to put the cars into public use. Most companies have predicted autonomous vehicles will be carrying people in the next three-to-five years.
The big investment by Intel validates predictions that autonomous cars will someday come in large numbers, signifying a sea change in the way we all get around, said Timothy Carone, a Notre Dame University professor who has written about the future of automation. “Major players are finding ways finding ways to position themselves for a change as seminal as the personal computer revolution,” he said.
This pundit is very cogent, as he criticizes early Bitcoin adopters and evangelists. He believes that they are too wrapped up in the original blockchain implementation, and that what goes up must come down—or, at least, that the earliest implementation of a new technology cannot adapt and become the durable leader in the field that it launched.
It’s the 15-minutes-of fame argument. But, I disagree! There are plenty of reasons to support, repair and expand Bitcoin—rather than fragment goodwill and abandon and a viable, two-sided network into 3,000 altcoins and blockchain startups.
Still, the author is very very bright and defends his position.
The proposed system could lead to breakthroughs in currently unsolvable problems.
A new method for printing on paper using light promises to be much cheaper, and easier on the environment than the traditional ink-based printing we’re used to.
Scientists have developed a special nanoparticle coating that’s easy to apply to normal paper and changes colour when ultraviolet (UV) light shines on it. The colour change can be reversed when the coating is heated to 120 degrees Celsius (248 degrees Fahrenheit), and allows for up to 80 rewrites.
The team of researchers from the US and China say that their new high-resolution light printing technique could be used everywhere from newspapers to labels, saving on the cost of ink and paper, and on the environmental cost of their recycling and disposing.
Continue reading “Scientists Have Found a Crazy New Way to Print on Paper Using Light” »
In Brief
The China Meteorological Administration wants to increase rainfall and snow across 960,000 square kilometers of the country. A more effective way of making this happen that doesn’t involve a ritualistic rain dance? Spending $168 million on cloud seeding technology that they hope will allow them to manipulate the weather.
Here’s how it works. The money will be invested into four new aircrafts, upgrading eight existing planes, and launching 900 rocket systems that will allow them to sprinkle substances above the clouds that could induce the rainmaking process. These substances range from silver iodide to dry ice. Adding these chemicals into clouds might lower their temperature and speed up the condensation process.
Continue reading “China’s New ‘Weather-Controlling Tech’ Could Make it Rain on Demand” »
