“Researchers at the University of Wisconsin-Madison are the first to have fabricated carbon nanotube transistors (CNTs) that outperform the current-density of conventional semiconductors like silicon and gallium arsenide, ” reports NanotechWeb. Slashdot reader wasteoid shares the site’s interview with one of the researchers: “When the transistors are turned on to the conductive state (meaning that current is able to pass through the CNT channel) the amount of current traveling through each CNT in the array approaches the fundamental quantum limit, ” he tells nanotechweb.org. “Since the CNTs conduct in parallel, and the packing density and conductance per tube are very high, the overall current density is very high too — at nearly twice that of silicon’s. The result is that these CNT array FETs have a conductance that is seven times higher than any previous reported CNT array field-effect transistor.” The research was funded in part by the U.S. Army and Air Force, as well as the National Science Foundation. “The implication here is that by replacing silicon with a CNT channel, it should be possible for us to make either a higher performing device or one that works at lower power.” In other news, Fujitsu announced this week that it’s joining an effort to release a 256-megabyte 55-nanometer carbon nanotube-based NRAM by 2018. Read more of this story at Slashdot.
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New Carbon Nanotube Chip Outperforms Silicon Semiconductors
An anonymous reader quotes a report from Reuters: The European Commission will rule against Ireland’s tax dealings with Apple on Tuesday, two source familiar with the decision told Reuters, one of whom said Dublin would be told to recoup over 1 billion euros in back taxes. The European Commission accused Ireland in 2014 of dodging international tax rules by letting Apple shelter profits worth tens of billions of dollars from tax collectors in return for maintaining jobs. Apple and Ireland rejected the accusation; both have said they will appeal any adverse ruling. The source said the Commission will recommend a figure in back taxes that it expects to be collected, but it will be up to Irish authorities to calculate exactly what is owed. A bill in excess of 1 billion euros ($1.12 billion) would be far more than the 30 million euros each the European Commission previously ordered Dutch authorities to recover from U.S. coffee chain Starbucks and Luxembourg from Fiat Chrysler for their tax deals. When it opened the Apple investigation in 2014, the Commission told the Irish government that tax rulings it agreed in 1991 and 2007 with the iPhone maker amounted to state aid and might have broken EU laws. The Commission said the rulings were “reverse engineered” to ensure that Apple had a minimal Irish bill and that minutes of meetings between Apple representatives and Irish tax officials showed the company’s tax treatment had been “motivated by employment considerations.” Read more of this story at Slashdot.