Archive for the ‘Nanotechnology’ Category
Attosecond Technology – Can We Freeze Time? Laser adventures in the realm of the nano-nanosecond. – John Tisch’s Inaugural Lecture
John Tisch (project PI) has his professorial Inaugural Lecture at Imperial College, June 22, 2011. In this lecture John Tisch explains some of the exciting possibilities in ultrafast phenomena and measurement techniques to broad audience. This is the perfect starting point non-specialists to find out more about attosecond science. Take a tour of high-speed measurement technology that provides startling insight into the world around us, from galloping horses to electrons.
Chang W. Lee/The New York Times
By ELISABETH BUMILLER and THOM SHANKER
Published: June 19, 2011
…From blimps to bugs, an explosion in aerial drones is transforming the way America fights and thinks about its wars. Predator drones, the Cessna-sized workhorses that have dominated unmanned flight since the Sept. 11, 2001, attacks, are by now a brand name, known and feared around the world. But far less known is the sheer size, variety and audaciousness of a rapidly expanding drone universe, along with the dilemmas that come with it.
The Pentagon now has some 7,000 aerial drones, compared with fewer than 50 a decade ago. Within the next decade the Air Force anticipates a decrease in manned aircraft but expects its number of “multirole” aerial drones like the Reaper — the ones that spy as well as strike — to nearly quadruple, to 536. Already the Air Force is training more remote pilots, 350 this year alone, than fighter and bomber pilots combined.
Read More at: http://www.nytimes.com/2011/06/20/world/20drones.html?_r=3&
A bright blue pigment used 5,000 years ago is giving modern scientists clues toward the development of new nanomaterials with potential uses in state-of-the-art medical imaging devices, remote controls for televisions, security inks and other technology.
Tina T. Salguero and colleagues point out that Egyptian blue, regarded as humanity’s first artificial pigment, was used in paintings on tombs, statues and other objects throughout the ancient Mediterranean world. Remnants have been found, for instance, on the statue of the messenger goddess Iris on the Parthenon and in the famous Pond in a Garden fresco in the tomb of Egyptian “scribe and counter of grain” Nebamun in Thebes.
They describe surprise in discovering that the calcium copper silicate in Egyptian blue breaks apart into nanosheets so thin that thousands would fit across the width of a human hair.
The sheets produce invisible infrared (IR) radiation similar to the beams that communicate between remote controls and TVs, car door locks and other telecommunications devices. “Calcium copper silicate provides a route to a new class of nanomaterials that are particularly interesting with respect to state-of-the-art pursuits like near-IR-based biomedical imaging, IR light-emitting devices (especially telecommunication platforms) and security ink formulations,” the report states. “In this way we can reimagine the applications of an ancient material through modern technochemical means.”