Quantum Dots can Spit out Clone-like Photons

Scanning Transmission Electron Microscope image (STEM) of single perovskite quantum dots. New study shows that single perovskite quantum dots could be a fundamental building block for quantum-photonic technologies for computing or communications.
Credit: Image courtesy of the authors

Researchers have produced coherent single photon emitters, a key component for future quantum computers and communications systems. The study, which involves using a family of materials known as perovskites to make light-emitting particles called quantum dots, appears today in the journal Science. The paper is by MIT graduate student in chemistry Hendrik Utzat, professor of chemistry Moungi Bawendi, and nine others at MIT and at ETH in Zurich, Switzerland.

The ability to produce individual photons with...

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Scientists uncover how High-Fat diet drives Colorectal Cancer growth

Colon cancer growth, as measured by the number of dividing cells shown in green, is dramatically increased when the FXR-regulated gene network is disrupted by specific bile acids or a high-fat diet.
Colon cancer growth, as measured by the number of dividing cells shown in green, is dramatically increased when the FXR-regulated gene network is disrupted by specific bile acids or a high-fat diet.
Click here for a high-resolution image.
Credit: Salk Institute

Experimental drug candidate slows cancer progression in mouse model. A new study suggests that high-fat diets fuel colorectal cancer growth by upsetting the balance of bile acids in the intestine and triggering a hormonal signal that lets potentially cancerous cells thrive. The findings could explain why colorectal cancer, which can take decades to develop, is being seen in younger people growing up at a time when higher-fat diets are common.

As cancer death rates drop overall, doctors have noted a frightening anomaly: deaths fro...

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Dose of Vitamin C helps Gold Nanowires Grow

Gold nanowires grown in the Rice University lab of chemist Eugene Zubarev promise to provide tunable plasmonic properties for optical and electronic applications. The wires can be controllably grown from nanorods, or reduced.
Credit: Zubarev Research Group/Rice University

Scientists discover a method to turn stubby gold nanorods into gold nanowires of impressive length. The metal wires could be valuable for sensing, diagnostic, imaging and therapeutic applications. A boost of vitamin C helped Rice University scientists turn small gold nanorods into fine gold nanowires.

Common, mild ascorbic acid is the not-so-secret sauce that helped the Rice lab of chemist Eugene Zubarev grow pure batches of nanowires from stumpy nanorods without the drawbacks of previous techniques.

“There’s n...

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Tiny Neptune Moon Spotted by Hubble may have Broken from Larger Moon

An artist’s concept of the tiny moon Hippocamp that was discovered by the Hubble Space Telescope in 2013. Only 20 miles across, it may actually be a broken-off fragment from a much larger neighboring moon, Proteus, seen as a crescent in the background. This is the first evidence for a moon being an offshoot from a comet collision with a much larger parent body.
Credit: NASA, ESA and J. Olmsted (STScI)

Astronomers call it “the moon that shouldn’t be there.” After several years of analysis, a team of planetary scientists using NASA’s Hubble Space Telescope has at last come up with an explanation for a mysterious moon around Neptune that they discovered with Hubble in 2013.

The tiny moon, named Hippocamp, is unusually close to a much larger Neptunian moon called Proteus...

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