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Hitting the Books: How Mildred Dresselhaus' research proved we had graphite all wrong
In Carbon Queen, author Maia Weinstock illuminates the life and foundational scientific achievements of MIT's first female institute professor, National Medal of Science winner Mildred Dresselhaus.
Heatworks' Duo carafe is instant kettle meets stylish Brita
We're all thinking it: Waiting for the kettle to boil is so 2018. But that hot minute of idly poking Insta while you await your coffee fix could be eliminated if Heatworks has anything to say about it. The company has created Duo, a "carafe" that heats water, instantly, as you pour it. It may look like a stylish Brita filter -- and filtration is part of the package -- but thanks to the graphite electrodes in its upper half, water is heated within 1°F of your desired temperature as it leaves the vessel.
Diamonds convert nuclear waste into clean batteries
Nuclear waste is normally a major environmental headache, but it could soon be a source of clean energy. Scientists have developed a method of turning that waste into batteries using diamond. If you encapsulate short-range radioactive material in a human-made diamond, you can generate a small electrical charge even as you completely block harmful radiation. While the team used a nickel isotope for its tests, it ultimately expects to do this using the carbon isotope you find in graphite blocks from nuclear power plants.
Here's why the surface of Mercury is so dark
For years, scientists have wondered why Mercury is so dark. It doesn't have as much iron and titanium as the Moon, so it should be brighter. A team at Johns Hopkins' Applied Physics Laboratory finally has the answer, though. Thanks to a spectral analysis of color images from NASA's Messenger probe, they've determined that carbon (specifically, graphite) is the probable culprit behind Mercury's dim look. Most likely, what you're seeing is the aftermath of the tiny planet growing up. As the young Mercury's magma ocean cooled 4.6 billion years ago, the graphite would have floated to the top and formed the original crust -- there just happens to be enough of it left to affect visibility.
Huawei can quick-charge your phone without hurting its battery
That fast-charging smartphone you just bought has a dirty secret: more likely than not, it's reducing the lifespan or capacity of the battery to get that breakneck speed. Huawei doesn't think you should have to compromise, though. It just showed off a lithium-ion battery whose graphite-coated anode (where current flows) allows for very quick charging without hurting either capacity or long-term longevity. How quick? With a 3,000mAh of the sort you'd find in a larger phone, Huawei can give you a 48 percent charge in just 5 minutes. Yes, you could have enough power for an evening out in the time it takes to change out of your work clothes. There's an even faster prototype that reaches 68 percent in 2 minutes, although its 600mAh capacity isn't practical at its size.
Magnetically lifted graphite moves by laser, may lead to light-based maglev vehicles (video)
Magnetic levitation is central to the fastest trains we know today, but it's that dependence on electromagnets and rails that limits how and where it's used for transportation. Aoyama Gakuin University has a unique alternative: changing the material properties themselves. By floating graphite over a bed of circular magnets, taking advantage of its tendency to generate an opposing magnetic field, researchers can move the graphite just by blasting its edge with a laser. The heat skews the magnetic behavior of that area enough to unbalance the graphite, either in a specific direction or a spin. The research team believes it could lead to maglev transportation or even energy converting turbines that are steered solely by light, with no contact or outside guides: maglev vehicle pilots could have much more control over where they go. Getting to that point will require a much larger scale, but successful development could give technology a very literal lift.
Korean carbon-coated lithium-ion battery could cut recharge times down to minutes
Anyone who's had to recharge an EV -- or, for that matter, any mobile device with a very big battery -- knows the pain of waiting for hours while a lithium-ion pack tops up. South Korea's Ulsan National Institute of Science and Technology has developed a conduction technique that could cut that charging time down to less than a minute. By dousing the nanoparticle materials of the battery in a graphite solution that's then carbonized, the researchers make a web of conductors that all start charging at once; current batteries have to charge towards the center slowly, like a not-very-edible Tootsie Pop. The immediate goal is to develop a secondary battery for an EV that could provide extra mileage in a matter of seconds. Here's hoping that the Ulsan team's fast-charging battery is more viable than others and spreads to just about everything -- we'd love to have EVs and laptops alike that power up in as much time as it takes to fill a traditional car at the pump. [Image credit: iFixit]
New nanotube battery technology leads to blisteringly fast recharges, improved safety features
Some day, your restroom break may be enough time to charge your [insert nifty gadget here] halfway. A group of researchers at the Department of Energy's Argonne National Laboratory has discovered that nanotubes composed of titanium dioxide can switch their phase as a battery is cycled, gradually boosting their operational capacity. The upshot: laboratory tests showed that new batteries produced with this material could be rejuvenated to 50 percent of their maximum charge in less than 30 seconds. This was accomplished by replacing conventional graphite anodes with titanium nanotube andodes. Following the experiment, lead researcher Tijana Rajh and her colleagues noted that as the battery cycled through several charges and discharges, its internal structure began to orient itself in a way that dramatically improved the battery's performance. Furthermore, using anodes composed of titanium dioxide instead of graphite could improve the reliability and safety of lithium-ion batteries and help avoid scenarios in which the lithium can deposit on the graphite anodes, causing a dangerous chain reaction known as "thermal runaway." Copious amounts of related technobabble can be found in the links below, and there's a video just past the break, too.
Sharpie Liquid Pencil doesn't dry like a Sharpie
We were pretty excited about the Sharpie Liquid Pencil when we first heard about it -- it uses liquid graphite to write like a pen, erase like a pencil, and (supposedly) dry like a permanent marker after three days. Well, it's been just over a week since our first hands-on, and we've got some bad news: we can still erase what we've written pretty easily. If you squint just right it sort of looks like it might have dried a little darker, but it's certainly not Sharpie-level permanence. Sad faces all around. We've followed up with Sharpie to see what's going on and we'll let you know what we hear, but check the video after the break in the meantime.
Miniature pencil tip sculptures make art from the everyday
We'll admit it: we're pretty big fans of pencils (you may remember them as those wooden sticks early humans used to scribble in their diaries with), so we were pretty tickled to see these beauties. Artist Dalton Ghetti's tiny pencil sculptures are made using only a razor blade, a sewing needle and a sculpting knife. The results are incredibly beautiful and impressive. One more shot below, hit the source for plenty more.
Sharpie Liquid Pencil writes and erases like a pencil, dries like a Sharpie (video hands-on!)
Doesn't look like we've ever covered a pencil on Engadget before, but this is just too nifty to pass up: the Sharpie Liquid Pencil uses liquid graphite to write like a pen, erase like a pencil, and eventually dry like a permanent marker. Sharpie's blog says the Liquid Pencil go on sale in September, but Office Depot has a $5 two-pack with six erasers in stock online now -- and we were charming enough to snag an early review sample. It basically works as described, although the marks don't erase completely clear -- because you're writing with a metal pen tip, there's no way to avoid impressing the paper a little, and the indentations are pretty visible. Still, it's better than any erasable pen we've ever used, and it definitely writes like a decent clicky-pen, so we can't fault it too much. Oddly, Sharpie's blog says it takes three days for the ink to dry to permanence, but the back of the package says 24 hours, so we'll have to see how long our test scribbles last -- we'll let you know. Video after the break. %Gallery-99118%
MIT's piezoelectric fibers can act as speaker or microphone, don't mind auto-tune
Piezoelectric materials work quite simply, in theory -- motion in, electricity out, or vice versa -- and since that's just how speakers and microphones transmit their sound, it's not much of a stretch to imagine someone would figure out audio on a micron scale. That someone is MIT's Yoel Fink, who's reportedly engineered a marvelous process for producing fibers that can detect and emit sound. Following up their famous work on flexible cameras, Fink's team discovered they could keep piezoelectric strands rigid enough to produce audible vibrations by inserting graphite, AKA pencil lead. Better yet, the lab process can apparently make the threads on a fairly large scale, "yielding tens of metres of piezoelectric fibre" at a single draw. The potential for fabric made from such fibers is fantastic, of course -- especially combined with this particular scientist's previous research into camera cloth.
Amazon's graphite Kindle DX now shipping
Amazon promised that its new, Pearl display-equipped graphite Kindle DX would start shipping today and, as a helpful tipster informs us, the first shipping notices are now indeed going out. What's more, unlike some past Kindle debuts, the e-reader is also still listed as in stock, so it looks like you're not out of luck if you didn't get your pre-order in. Of course, it's not clear if that's due to increased supply or reduced demand -- although, at $379, we'd have to guess it's moving a bit slower than the regular $189 Kindle.
Graphite Kindle DX coming July 7th for $379, now available for pre-order
Amazon's having a field day with its Kindle lineup as of late. Hot off the heels of its Kindle price drop, bigger brother Kindle DX has gotten a new shade, a touted 50 percent improved contrast, and a $379 price tag -- much lower than the $489 it asked for when first hitting the scene. Not to worry, there's still a 9.7-inch E-ink display and free 3G wireless. Though not shipping until July 7th, you can go ahead and give Bezos and co. your money today, whether you're a domestic or international customer. [Thanks to everyone who sent this in]
Scientists use GC-MS to analyze famous paintings, pick out KIRFs
The debate raged for years (at least in those circles where things like this inspire rage): Which museum had the genuine article? Both the UK National Gallery and the Carnegie Museum of Art in Pittsburgh laid claim to Virgin and Child with an Angel by Renaissance artist Francesco Francia, and most experts agreed that the one in London was legit. That is, until last year when the organic chemistry of the painting was studied using something called a gas-chromatography-mass-spectrometer. In the hands of researchers, a GC-MS is used to determine the composition and characteristics of paint binding media, resins, varnishes, and obscure pencil marks -- which, in the case of the Francia, proved that the painting is in fact a 19th century forgery (graphite not being available to Francia in 16th century Italy). Don't feel bad, London. We've all been fooled by international art forgers at some point.
Graphene rolled out in 30-inch sheets, makes for one durable touchscreen (video)
Whether they're slated to power terahertz chips or transparent electrodes, graphene sheets have garnered tremendous excitement, but the scientific community has had great trouble making the single-atom-thick pencil lead lattices large enough for industrial use. Thankfully, the same South Korean scientists who brought us 10 centimeter film never abandoned their post, and now Sungkyunkwan University has composited 30-inch sheets of the stuff and prototyped a working touchscreen panel as well. Using a modified version of the popular chemical vapor disposition deposition (CVD) technique that grows the graphene on top of copper foil, they were able to produce a four-ply graphene stack with 90 percent transparency, plus resistance and durability reportedly superior to the dwindling indium supplies currently used in displays. Now let's see some 300mm wafers, eh? Watch one of the world's first graphene digitizers make its video debut after the break.
Boost's Motorola i465 Clutch getting redone in graphite, available next Tuesday
If you're feeling the need to text your face off on Boost Mobile but the original i465 Clutch's maroon shade wasn't your cup of tea, fret not -- there's a new shade in town. "Graphite," which is really just a fancy way of saying "black," is going to end up being the second color option for Motorola's first QWERTY iDEN set when it launches next Tuesday for $129.99. Sounds expensive, but when you consider that Boost is commitment-free, it's not that bad.
AirPort Admin Utility for Graphite and Snow 4.2.5
Along with the Keynote update, today Apple posted an update for the Graphite and Snow AirPort Admin utility. You can read more information about this Admin Utility update on the Apple support website; in a nutshell, it adds Leopard compatibility -- a good thing.If you want to download the update, you can either open Software Update (Apple menu > Software Update) or download the installer package from the Apple support downloads site. Note that he newer AirPort Utility (v5.3.1 or later) should be used for Time Capsule, and for AirPort Extreme or AirPort Express Base Stations. The update here is for the older base stations' admin tool.Thanks to everyone who sent this in!
FCC spills beans on O2 Xda Graphite
If we were to play a game of word association and you said "Windows Mobile," we'd be likely to blurt out "HTC" in response. That appears to be just the kind of attitude ASUS is looking to adjust -- at least in Europe, anyway. After the VDA IV popped up via the FCC a few days back, its O2-branded sibling followed hot on its heels, bringing all that same 3G Windows Mobile Smartphone joy in a candybar form factor. Stand-out features include 128MB of Flash with 64MB of RAM (a lot of modern Pocket PCs get by with those kinds of numbers), a legit 3.5mm audio jack, front-facing cam for video calling, and of course, those UMTS data speeds. Hey ASUS, any chance you folks would mind investing in some 1700MHz radios?[Via CoolSmartPhone]
