Quantum dots tagged posts

Single nanocrystal spectroscopy identifies the interaction between zero-dimensional CdSe/ZnS nano crystals (quantum dots) and two-dimensional layered tin disulfide as a non-radiative energy transfer, whose strength increases with increasing number of tin disulfide layers. Such hybrid materials could be used in optoelectronic devices such as photovoltaic solar cells, light sensors, and LEDs. Credit: Brookhaven National Laboratory

It paves the way for better optoelectronic apps eg energy-harvesting photovoltaics, light sensors, LEDs. Scientists combined excellent light-harvesting properties of quantum dots with the tunable electrical conductivity of a layered tin disulfide semiconductor...

Quantum dots are fluorescent crystals in which the color of the emitted light is dependent on the size of the crystal. Credit: Richard E. Cruise, University of Leeds

University of Leeds researchers have observed for the first time how HIV and Ebola viruses attach to cells to spread infection. The findings offer a new way of treating such viruses: instead of destroying the pathogens, introduce a block on how they interact with cells. They used ‘quantum dots’ that mimicked the shape of the viruses and acted as technological stand-ins in experiments to reveal how they bind to cells.

Quantum dots are fluorescent crystals in which the colour of the emitted light is dependent on the size of the crystal – one of several properties that has led to them becoming the most desirable component for the...

Iron-dotted boron nitride nanotubes, made in Yoke Khin Yaps’ lab at Michigan Tech, could make for better wearable tech because of their flexibility and electronic behaviors. Credit: Michigan Tech, Sue Hill

The road to more versatile wearable technology is dotted with iron. Specifically, quantum dots of iron arranged on boron nitride nanotubes (BNNTs). Yap says the iron-studded BNNTs are pushing the boundaries of electronics hardware. The transistors modulating electron flow need an upgrade.

“Look beyond semiconductors,” he says, explaining that materials like silicon semiconductors tend to overheat, can only get so small and leak electric current. The key to revamping the fundamental base of transistors is creating a series of stepping-stones that use quantum tunneling.

The nanotubes are t...

Quantum dots make it possible to display any color in full brilliance. Credit: © Fraunhofer IAP

Quantum dots have made it possible to substantially increase color quality in LCD displays. However, these cadmium-based nanocrystals have proven to be harmful to the environment. Researchers are now developing a promising alternative: quantum dots based on indium phosphide.

The landscape is breathtaking. Because it is so real, you forget for a moment that the eagle circling the sky is not outside your window, but is instead on your television. Such realistic images are not only due to high resolution displays; the colors play a role as well. This is possible thanks to quantum dots (QDs), with a thickness of a few atoms...