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To further shrink electronic devices and to lower energy consumption, the semiconductor industry is interested in using 2-D materials, but manufacturers need a quick and accurate method for detecting defects in these materials to determine if the material is suitable for device manufacture. Now a team of researchers has developed a technique to quickly and sensitively characterize defects in 2-D materials.

Two-dimensional materials are atomically thin, the most well-known being graphene, a single-atom-thick layer of carbon atoms.

“People have struggled to make these 2-D materials without defects,” said Mauricio Terrones, Verne M. Willaman Professor of Physics, Penn State. “That’s the ultimate goal. We want to have a 2-D material on a four-inch wafer with at least an acceptable number of defects, but you want to evaluate it in a quick way.”

SHANGHAI—Hundreds of Americans were preparing to fly out of Wuhan, bound for California, as fears grew at the epicenter of China’s health crisis. But more U.S. citizens aren’t leaving, having failed to secure a seat on the single U.S.-bound flight—or decided to ride out the emergency where they are.

A State Department evacuation flight promised relief for a segment of Wuhan’s roughly 1,000 Americans, as a lockdown triggered by a coronavirus outbreak turned the focus to the dangers of contagion and a long quarantine in China’s…

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NASA has announced that they have selected Axiom Space, an American company headquartered in Houston, Texas, to design, build and launch three large pressurized modules and a large Earth observation window to the International Space Station (ISS).

This partnership between NASA and Axiom is issued under Appendix I of NASA Next Space Technologies for Exploration Partnerships 2 (NextSTEP-2) public-private partnership program witch the agency hopes will help stimulate commercial development of deep space exploration capabilities.

Appendix I of NextSTEP-2 was originally issued on June 7th 2019 and called for private companies to bid to develop habitable commercial modules, to be built and launched to the International Space Station, and then attached to the forward end of the station as part of NASA’s long term plan to open up the ISS to large amounts of commercial opportunities.

Dreams can feel awfully real when you’re deep in sleep. Perhaps you find a hidden doorway in your home that leads to entirely new rooms and passageways. Maybe you went to work in your underwear—yikes.

When you wake up, you check your closet for that mysterious doorway; maybe you jolt awake in a cold sweat, instantly relieved you still have plenty of time to properly clothe yourself before leaving the house. Regardless, whatever you were experiencing felt very real just moments ago.

Dreams are essentially vivid memories that never existed. Yet you find yourself inside an all-encompassing parallel reality, a fantastical world that’s uniquely yours. The trouble with dreams, especially the fun ones, is that they’re fleeting. Often, you can’t remember a thing from a dream just moments after waking—the echo of some feeling is all that remains. But what if you could record your dreams, and play them back for analysis, or even share them with friends?

A new study from Washington University School of Medicine in St. Louis suggests that bone marrow — or blood stem cells — from healthy donors can harbor extremely rare mutations that can cause health problems for the cancer patients who receive them.


A stem cell transplant — also called a bone marrow transplant — is a common treatment for blood cancers, such as acute myeloid leukemia (AML). Such treatment can cure blood cancers but also can lead to life-threatening complications, including heart problems and graft-versus-host disease, in which new immune cells from the donor attack a patient’s healthy tissues.

A new study from Washington University School of Medicine in St. Louis suggests that extremely rare, harmful genetic mutations present in healthy donors’ stem cells — though not causing health problems in the donors — may be passed on to cancer patients receiving stem cell transplants. The intense chemo- and radiation therapy prior to transplant and the immunosuppression given after allow cells with these rare mutations the opportunity to quickly replicate, potentially creating health problems for the patients who receive them, suggests the research, published Jan. 15 in the journal Science Translational Medicine.

Among the concerns are heart damage, graft-versus-host disease and possible new leukemias.