Category Chemistry/Nanotechnology

Faster-degrading Plastic could promise Cleaner Seas

Chemists create faster-degrading plastic for marine uses | Cornell ...

To address plastic pollution plaguing the world’s seas and waterways, Cornell University chemists have developed a new polymer that can degrade by ultraviolet radiation, according to research published in the Journal of the American Chemical Society.

“We have created a new plastic that has the mechanical properties required by commercial fishing gear. If it eventually gets lost in the aquatic environment, this material can degrade on a realistic time scale,” said lead researcher Bryce Lipinski, a doctoral candidate in the laboratory of Geoff Coates, professor of chemistry and chemical biology at Cornell University. “This material could reduce persistent plastic accumulation in the environment.”

Commercial fishing contributes to about half of all floating plastic waste that ends ...

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New discovery settles Long-Standing Debate about Photovoltaic Materials

Ames Laboratory scientists discovered evidence of the Rashba effect by using extremely strong and powerful bursts of light firing at trillions of cycles per second to switch on or synchronize a “beat” of quantum motion within a material sample; and a second burst of light to “listen” to the beats, triggering an ultrafast receiver to record images of the oscillating state of matter. Credit: US Department of Energy, Ames Laboratory

Scientists have theorized that organometallic halide perovskites— a class of light harvesting “wonder” materials for applications in solar cells and quantum electronics— are so promising due to an unseen yet highly controversial mechanism called the Rashba effect. Scientists at the U.S...

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Carbon Nanostructure created that is Stronger than Diamonds

UCI-led team designs carbon nanostructure stronger than diamonds
With wall thicknesses of about 160 nanometers, a closed-cell, plate-based nanolattice structure designed by researchers at UCI and other institutions is the first experimental verification that such arrangements reach the theorized limits of strength and stiffness in porous materials. Cameron Crook and Jens Bauer / UCI

Novel plate-cell architecture reaches theoretical limit of performance. Researchers at the University of California, Irvine and other institutions have architecturally designed plate-nanolattices — nanometer-sized carbon structures — that are stronger than diamonds as a ratio of strength to density.

In a recent study in Nature Communications, the scientists report success in conceptualizing and fabricating the material, which consists of closely connected, closed-cell...

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3D-Printed Corals could Improve Bioenergy and help Coral Reefs

Daniel Wangpraseurt et al. ‘Bionic 3D printed corals.’ Nature Communications (2020). DOI: 10.1038/s41467-020-15486-4

Researchers from Cambridge University and University of California San Diego have 3D printed coral-inspired structures that are capable of growing dense populations of microscopic algae. Their results, reported in the journal Nature Communications, open the door to new bio-inspired materials and their applications for coral conservation.

In the ocean, corals and algae have an intricate symbiotic relationship. The coral provides a host for the algae, while the algae produce sugars to the coral through photosynthesis. This relationship is responsible for one of the most diverse and productive ecosystems on Earth, the coral reef.

“Corals are highly efficient at co...

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