If the bottom is a layer of graphene in a super capacitor, then storage can be increased by making the solution above it as low-volume as possible. Lawrence Livermore National Lab Individual pieces of graphene have some pretty amazing properties, but finding a way to produce bulk materials that make good use of those properties has been rather challenging. Now, researchers have figured out a way to make graphene-based electrodes in bulk through a process so simple that it can be adapted to the manufacturing techniques that we currently use to make paper. And the resulting capacitors, at least in these test cases, had storage capacities that approached those of lead-acid batteries. Those of us who have taken basic physics tend to think of capacitors as two parallel, charge-holding plates, since that’s how they’re taught. But electrochemical capacitors perform a similar trick on a much smaller scale, by having the charges held by individual ions that absorb to an electrode. To boost capacity, the simplest thing to do is to increase the surface area for the ions to interact with. That’s why graphene seems so appealing; since it’s only a single atom thick, it should be possible to stick a tremendous amount of surface into a relatively small volume. The problem, however, has been getting the ions into the graphene itself in order for them to interact. Once the graphene is prepared, lots of factors like pore size and inter-sheet spacing come into play, since these control how quickly ions can get into the graphene. A team at Australia’s Monash University came up with an easy solution to this: put the ions in place during the manufacturing process. Read 4 remaining paragraphs | Comments
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Simple technique puts graphene capacitors on par with lead-acid battery
A Bitcoin startup based in Thailand now says that it has suspended all operations because the Bank of Thailand has effectively banned bitcoins in the southeast Asian country. As Bitcoin Co. Ltd. reports: At the conclusion of the meeting, senior members of the Foreign Exchange Administration and Policy Department advised that due to lack of existing applicable laws, capital controls, and the fact that Bitcoin straddles multiple financial facets the following Bitcoin activities are illegal in Thailand: – Buying bitcoins – Selling bitcoins – Buying any goods or services in exchange for bitcoins – Selling any goods or services for bitcoins – Sending bitcoins to anyone located outside of Thailand – Receiving bitcoins from anyone located outside of Thailand This appears to be the first time that any country has outright banned the digital crypto currency . Further, it remains unclear exactly how Thailand would even enforce such a ban. Ars has been unable to confirm the ban with the Bank of Thailand , when this ban goes into effect, and how this decision came about. Bank representatives did not immediately respond to Ars’ request for comment. Read 1 remaining paragraphs | Comments 
A man from just outside of Washington, DC turned himself in to local police—with his computer in tow—after receiving a pop-up message from what he believed was an “FBI Warning” telling him to click to pay a fine online, or face an investigation. While specific details on the case are scant as of yet, it appears that the suspect here fell victim to a type of ransomware that has been proliferating for years now—raking in millions for the scammers behind it. Police said Jay Matthew Riley, 21, of Woodbridge, Virginia, walked into Prince William’s Garfield District Station on July 1, 2013 to “inquire if he had any warrants on file for child pornography.” Read 2 remaining paragraphs | Comments 
A man who has won about $1.5 million in poker tournaments has been arrested and charged with running an operation that combined spam, Android malware, and a fake dating website to scam victims out of $3.9 million, according to Symantec. Symantec worked with investigators from the Chiba Prefectural Police in Japan, who earlier this week “arrested nine individuals for distributing spam that included e-mails with links to download Android.Enesoluty —a malware used to collect contact details stored on the owner’s device, ” Symantec wrote in its blog . Android.Enesoluty is a Trojan distributed as an Android application file. It steals information and sends it to computers run by hackers. It was discovered by security researchers in September 2012. Read 4 remaining paragraphs | Comments 