Science | WPN World People News

Quantum dots are tiny crystals of semiconductor a few billionths of a meter in diameter. At that size they exhibit beneficial behaviors of quantum physics such as forming electron-hole pairs and harvesting excess energy.

At the center of this image from NASA's Curiosity rover is the hole in a rock called "John Klein" where the rover conducted its first sample drilling on Mars.

Printing on the micrometer scale: Writing time for a miniaturized spacecraft is reduced to less than one minute without loss of quality.

South Pole ozone

(a) This is an optical image of the microfluidic crossed-channel device. Flow in the center control region (dashed circle) is manipulated in two dimensions by 4 external electrodes (not shown). Scale bar is 500 μm. (b) This is a schematic of the positioning and imaging technique. A single QD is driven along a trajectory close to the wire by flow control. The inset shows a microcope image of a typical nanowire with 1 μm scale bar.

Diagram depicting the passage of asteroid 2012 DA14 through the Earth-moon system on Feb. 15, 2013.

An illustration of a silicon AFM tip sliding over a diamond surface, with a TEM image of the tip inset.

Schematic representation of spherical assemblies. a) A standard micelle composed of string-like detergents. b) An aromatic micelle composed of new detergents with bent aromatic panels.

Iranian researchers produced a new type of clay-titanium oxide nanocomposite films which improve the blocking properties of normal polyethylene films, control the production of polyethylene, postpone the aging, reduce pollutions after harvesting the products and increase the durability of agricultural products.