Tag Archives: materials science

a new superconductor?

Update 8/17/23: Unfortunately, Nature has debunked the idea below that this was a superconductor. The discussion of why a room temperature superconductor would be nice to have is still relevant.

We have a new superconductor…according to the scientists who believe they created it. Or not…compared to other scientists who haven’t been able to fully replicate it yet. Why are superconductors important?

Superconductors that can operate at room temperature and ambient pressure hold promise for quantum computing, a more efficient energy grid, producing energy from fusion and more innovation… Superconducting materials can conduct electricity without losing energy in the form of heat, which happens as electrons move through a material and interact with atoms.

Axios

This seems to me like something computers/robots could work on. Simulate a jagillion materials to see which could be room-temperature superconductors. Then synthesize the most promising ones, test them, determine the most promising of the most promising, tweak them randomly in a gajillion permutations, simulate them again, synthesize them again, test them again, and so on. You could introduce a little bit of random-ness into the process to avoid going down a path-dependent rabbit hole that ends in a dead end (sorry, way too many metaphors there).

more news from the yeast vats

This article in Scientific American is about using fungus to generate everything from building materials to human organs to meat to substitutes to plastics.

Mycelium’s fast-growing fibers produce materials used for packaging, clothing, food and construction—everything from leather to plant-based steak to scaffolding for growing organs. Mycelium, when harnessed as a technology, helps replace plastics that are rapidly accumulating in the environment.

Mycelium also provides a cruelty-free way to create meatlike structures with a much smaller environmental footprint than traditional livestock, reducing greenhouse gas emissions, the use of food crops for feed and land use conversion. All these benefits come with little environmental cost: the process of growing mycelium results in limited waste (mostly compostable) and requires minimal energy consumption.

May 2019 in Review

This wasn’t my most prolific writing (or reading) month ever. In fact, it my have been my worst. But here are a few highlights of what I did get around to.

Most frightening and/or depressing story:

  • Without improvements in battery design, the demand for materials needed to make the batteries might negate the environmental benefits of the batteries. I’m not really all that frightened or depressed about this because I assume designs will improve. Like I said, it was slim pickings this month.

Most hopeful story:

  • Planting native plants in your garden really can make a difference for biodiversity.

Most interesting story, that was not particularly frightening or hopeful, or perhaps was a mixture of both:

  • Joseph Stiglitz suggested an idea for a “free college” program where college is funded by a progressive tax on post-graduation earnings.

 

2018 in Review

Most frightening and/or depressing stories:

  • JANUARY: Cape Town, South Africa looked to be in imminent danger of running out of water. They got lucky, but the question is whether this was a case of serious mismanagement or an early warning sign of water supply risk due to climate change. Probably a case of serious mismanagement of the water supply while ignoring the added risk due to climate change. Longer term, there are serious concerns about snowpack-dependent water supplies serving large urban populations in Asia and western North America.
  • FEBRUARY: Cape Town will probably not be the last major city to run out of water. The other cities at risk mentioned in this article include Sao Paulo, Bangalore, Beijing, Cairo, Jakarta, Moscow, Istanbul, Mexico City, London, Tokyo, and Miami.
  • MARCH: One reason propaganda works is that even knowledgeable people are more likely to believe a statement the more often it is repeated.
  • APRIL: That big California earthquake is still coming.
  • MAY: The idea of a soft landing where absolute dematerialization of the economy reduces our ecological footprint and sidesteps the consequences of climate change through innovation without serious pain may be wishful thinking.
  • JUNE: The Trump administration is proposing to subsidize coal-burning power plants. Meanwhile the long-term economic damage expected from climate change appears to be substantial. For one thing, Hurricanes are slowing down, which  means they can do more damage in any one place. The rate of melting in Antarctic ice sheets is accelerating.
  • JULY: The UN is warning as many as 10 million people in Yemen could face starvation by the end of 2018 due to the military action by Saudi Arabia and the U.S. The U.S. military is involved in combat in at least 8 African countries. And Trump apparently wants to invade Venezuela.
  • AUGUST: Noam Chomsky doesn’t love Trump, but points out that climate change and/or nuclear weapons are still existential threats and that more mainstream leaders and media outlets have failed just as miserably to address them as Trump has. In related news, the climate may be headed for a catastrophic tipping point and while attention is mostly elsewhere, a fundamentalist takeover of Pakistan’s nuclear arsenal is still one of the more serious risks out there.
  • SEPTEMBER: A huge earthquake in the Pacific Northwest could be by far the worst natural disaster ever seen.
  • OCTOBER: The Trump administration has slashed funding to help the U.S. prepare for the next pandemic.
  • NOVEMBER: About half a million people have been killed in Iraq, Afghanistan, and Pakistan since the U.S. invasions starting in 2001. This includes only people killed directly by violence, not disease, hunger, thirst, etc.
  • DECEMBER: Climate change is just bad, and the experts seem to keep revising their estimates from bad to worse. The Fourth National Climate Assessment produced by the U.S. government is not an uplifting publication. In addition to the impacts of droughts, storms, and fires, it casts some doubt on the long-term security of the food supply. An article in Nature was also not uplifting, arguing that climate change is happening faster than expected due to a combination of manmade and natural trends.

Climate change, nuclear weapons, and pandemics. If I go back and look at last year’s post, this list of existential threats is going to be pretty much the same. Add to this the depressing grind of permanent war which magnifies these risks and diverts resources that could be used to deal with them. True, we could say that we got through 2018 without a nuclear detonation, pandemic, or ecological collapse, and under the circumstances we should sit back, count our blessings, and wait for better leadership. And while our leadership is particularly inept at the moment, I think Noam Chomsky has a point that political administration after political administration has failed to solve these problems and this seems unlikely to improve. The earthquake risk is particularly troublesome. Think about the shock we felt over the inept response to Katrina, and now think about how essentially the same thing happened in Puerto Rico, we are not really dealing with it in an acceptable way, and the public and news media have essentially just shrugged it off and moved on. If the hurricanes, floods, fires and droughts just keep hitting harder and more often, and we don’t fully respond to one before the next hits, it could mean a slow downward spiral. And if that means we gradually lose our ability to bounce back fully from small and medium size disasters, a truly huge disaster like an epic earthquake on the west coast might be the one that pushes our society to a breaking point.

Most hopeful stories:

I believe our children are our future…ya ya blahda blahda. It’s a huge cliche, and yet to be hopeful about our world I have to have some hope that future generations can be better system thinkers and problem solvers and ethical actors than recent generations have been. Because despite identifying problems and even potential solutions we are consistently failing to make choices as a society that could divert us from the current failure path. And so I highlighted a few stories above about ideas for better preparing future generations, ranging from traditional school subjects like reading and music, to more innovative ones like meditation and general system theory, and just maybe we should be open to the idea that the right amount of the right drugs can help.

Fossil fuels just might be on their way out, as alternatives start to become economical and public outrage slowly, almost imperceptibly continues to build.

There is real progress in the fight against disease, which alleviates enormous quantities of human suffering. I mention AIDS, diabetes, and Alzheimer’s disease above. We can be happy about that, of course. There are ideas about how to grow more food, which is going to be necessary to avoid enormous quantities of human suffering. Lest anyone think otherwise, my position is that we desperately need to reduce our ecological footprint, but human life is precious and nobody deserves to suffer illness or hunger.

Good street design that lets people get around using mostly their own muscle power. It might not be sexy, but it is one of the keys to physical and mental health, clean air and water, biodiversity, social and economic vibrancy in our cities. Come to think of it, I take that back, it can be sexy if done well.

Good street design and general systems theory – proof that solutions exist and we just don’t recognize or make use of them. Here’s where I want to insert a positive sentence about how 2019 is the year this all changes for the better. Well, sorry, you’ll have to find someone less cynical than me, and/or with much better powers of communication and persuasion than me to get the ball rolling. On the off chance I have persuaded you, and you have communication and/or persuasion super powers, let me know.

Most interesting stories, that were not particularly frightening or hopeful, or perhaps were a mixture of both:

Whatever else happens, technology and accumulation of human knowledge in general march on, of course. Computer, robotics, and surveillence technology march on. The human move into space is much slower and painful than many would have predicted half a century ago, and yet it is proceeding.

I’ll never drop the waterless sanitation thing, no matter how much others make fun of me. It’s going to happen, eventually. I don’t know whether we will colonize Mars or stop defecating in our water supply first, but both will happen.

The gene drive thing is really wild the more I think about it. This means we now have the ability to identify a species or group of species we don’t want to exist, then cause it not to exist in relatively short order. This seems like it could be terrifying in the wrong hands, doesn’t it? I’m not even sure I buy into the idea that rats and mosquitoes have no positive ecological functions at all. Aren’t there bats and birds that rely on mosquitoes as a food source? Okay, I’m really not sure what redeeming features rats have, although I did read a few years ago that in a serious food crunch farming rats would be a much more efficient way of turning very marginal materials into edible protein than chicken.

The universe in a bottle thing is mind blowing if you spend too much time thinking about it. It could just be bottles all the way down. It’s best not to spend too much time thinking about it.

That’s it, Happy 2019!

artificial spider silk

Artificial spider silk is an alternative to carbon fiber.

Amsilk is located in Martinsried, Germany, and owned by twins Andreas and Thomas Strüngmann. The Strüngmann brothers made their fortunes with Hexal, a generic drugmaker, and the company’s fibers came from research by Thomas Scheibel, a biomaterials professor at the University of Bayreuth.

The fibers are made by genetically modifying E.coli bacteria to produce spider silk proteins. These purified proteins are then dried into a silk powder, which can be put into textiles, cosmetics or used as the basis for lightweight composites.

Amsilk calls it “Biosteel” and says synthetic silk is resistant, flexible and soft, giving it an advantage over carbon fiber for use in implants and prosthetics, or even aviation. “The disadvantage of carbon is that aircraft are often grounded after a bump because parts have to be replaced,” said Amsilk boss Jens Klein. Minor damage to carbon fiber can be a big problem whereas Biosteel may be able to take the knock and remain in use.

 

X-Prize for turning carbon emissions into useful products

There are a number of ideas for turning carbon dioxide into concrete, carbon nanotubes, or other useful products:

Four teams are working on ways to use carbon dioxide in concrete: CarbonCure Technologies Inc. of Dartmouth, Nova Scotia; Carbon Upcycling UCLA, which is affiliated with the University of California, Los Angeles; Montreal-based Carbicrete; and Carbon Capture Machine Ltd. of Aberdeen, Scotland…

Another four teams are making fuel, plastics or chemical feedstocks: India-based BreatheC4X of Suzhou, China; CERT, from the University of Toronto; and Huntington Beach, California-based Newlight Technologies.

Two teams are making carbon nanotubes and nanoparticles, which are used in a broad range of products: C2CNT of Ashburn, Virginia, and Carbon Upcycling Technologies of Calgary.

liquid metal

The “liquid metal” from Terminator 2 is finally here, although it is not trying to kill us (yet). Still, if they start making autonomous drones out of this stuff…

“If you look at conventional aircraft technology, you have so many moving parts,” says Othmane Benafan, an engineer at NASA’s Glenn Research Center. Those moving parts are essential—they are how pilots steer, reduce turbulence, take off, land, and basically do everything else besides glide aimlessly. But the actuators, cables, motors, lubricant, hydraulic gear, and other bits needed move those parts around take up weight and space—precious resources on any aircraft.

The alternative is to move those wing parts using shapeshifting metals. Or, as they’re known to engineers, shape memory alloys. “Parts made from shape memory alloys are typically 10 to 20 percent the size and weight of a conventional part,” says Jim Mabe, a shape memory alloy guru at Boeing. For an industry that spent $133 billion on fuel last year, anything smaller and lighter is exciting news.

Shape memory alloys are essentially reversible Shrinky Dinks. When heated to certain temperatures, they shrink, twist, and bend. Cool them off, and they return to their original shape. Hot, cold, hot—shape memory alloys can cycle back and forth millions of times without wearing out. All you need is the ability to generate heat or pull it from some other, already spicy hot part of the plane, like the engine.

making carbon fiber from atmospheric CO2

Here is some research on making carbon nanofibers directly from atmospheric CO2. Sounds like a good idea both because you are absorbing CO2 from the atmosphere and because you can make all kinds of light, strong materials from nanofibers, which would allow lighter, safer, more energy efficient vehicles among other things.

Licht estimates electrical energy costs of this “solar thermal electrochemical process” to be around $1,000 per ton of carbon nanofiber product, which means the cost of running the system is hundreds of times less than the value of product output.

“We calculate that with a physical area less than 10 percent the size of the Sahara Desert, our process could remove enough CO2 to decrease atmospheric levels to those of the pre-industrial revolution within 10 years,” he says.

Joel Mokyr

I’m still reading about secular stagnation. Joel Mokyr from Northwestern University is one of the few optimistic voices in the book:

…digitalisation has penetrated every aspect of science. It has led to the re-invention of invention. It is not just ‘IT’ or ‘communications’. Huge searchable databanks, quantum chemistry simulation, and highly complex statistical analysis are only some of the tools that the digital age places at science’s disposal. Digital technology is everywhere, from molecular genetics to nanoscience to research in medieval poetry. Quantum computers, still quite experimental, promise to increase this power by orders of magnitude. In much recent writings, the importance of ICT on output and productivity has been stressed, and it is clearly of great importance. What needs to be kept in mind, however, is that the indirect effects of science on productivity through the tools it provides scientific research may, in the long run, dwarf the direct effects. A striking example is the growing use of high-powered computers and radically new software in material science.

Materials are the core of our production. The terms Bronze Ages and Iron Age signify their importance; the great era of technological progress between 1870 and 1914 was wholly dependent on cheap and ever-better steel. In many ways, core-materials can be viewed as general-purpose technologies made famous by Bresnahan’s and Trajtenberg’s (1995) seminal paper on the topic. But what is happening to materials now is nothing short of a sea change, with new resins, ceramics, and entirely new solids designed in silico, being developed at the nano-technological level. These promise the development of materials nature never dreamed of and that deliver custom-ordered properties in terms of hardness, resilience, elasticity, and so on. Graphene, the new super-thin wonder material, is another substance that promises to revolutionise production in many lines. The new research tools in material science have revolutionised research. Historically, progress in material science had been always the result of tedious and inefficient ‘trial and error’ or highly uncertain serendipity. The classic example is William Perkin’s discovery of aniline purple in 1856 and Henry Bessemer’s invention of the eponymous steel-making process the same year. Compare those with the situation today: researchers can now can simulate in silico the quantum equations that define the properties of materials, using high-throughput super-computers, and experiment with materials having pre-specified properties.

But not all research tools depend wholly on computational capacity. Of perhaps even more revolutionary importance is the powerful technology developed by Stanley Cohen and Herbert Boyer in the early 1970s, in which they succeeded in creating transgenic organisms through the use of micro-organisms. Genetic selection is an old technology; nature never intended to create poodles. But genetic engineering is to artificial selection what a laser-driven fine-tuned surgical instrument is to a meat axe. The potential economic significance of genetic engineering is simply staggering, as it completely changes the relationship between humans and all other species on the planet. Ever since the emergence of agriculture and husbandry, people have ‘played God’ and changed their biological and topographicalenvironment, creating new phenotypes in plants and animals. Genetic engineering means we are just far better at it.