By Soulskill from Slashdot's much-cooler-than-using-regular-tweezers department
writes "A beam of electrons can pick up and carry nanoparticles, according to a new study (abstract). The so-called electronic tweezers could help scientists in diverse tasks, such as building up new materials nanoparticle-by-nanoparticle, and measuring the forces between nanoparticles and living cells, the researchers say. In the past, scientists have manipulated microsized particles, including single cells, using a beam of laser light called optical tweezers. But the force required to trap a particle with optical tweezers increases as the particle gets smaller, making grappling with nanoparticles difficult. Researchers at Lawrence Berkeley National Laboratory developed an alternative to optical tweezers by modifying a transmission electron microscope, which produces images by passing a stream of electrons through a sample."
Reader Sven-Erik adds news of a tractor beam generated with laser light
that can pull microscopic particles over distances of 30 micrometers (abstract
).Read Replies (0)
By Soulskill from Slashdot's there-are-never-enough-app-stores department
sends this quote from ZDNet:"Mozilla has opened its Firefox Marketplace, with Android device owners and developers getting the first access to the browser's app store. The access arrived on Thursday, in the release of the latest 'Aurora' build of Firefox for Android. Aurora is meant for developers and early adopters, as it is the test stream of Mozilla's browser. The storefront lets people find and install web applications delivered via the browser, and gives developers a place to publicize their apps. 'We're hoping that Aurora users, our awesome early adopters, will go experience the Firefox Marketplace on their Android phones and let us know what they think,' Mozilla Labs engineering manager Bill Walker said in a blog post. 'Our goal is to collect as much real-life feedback as possible about the Marketplace's design, usability, performance, reliability, and content.' ... Mozilla said it expects to follow with a Marketplace for the Firefox browser beta and Firefox OS launches next year."Read Replies (0)