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Image: a hand holding a organic solar cell in different colours. The solar cell was supplied by Epishine AB.;  Copyright: Johan Bodell/Chalmers University of Technology

Breakthrough in organic electronics


Researchers from Chalmers University of Technology, Sweden, have discovered a simple new tweak that could double the efficiency of organic electronics. OLED-displays, plastic-based solar cells and bioelectronics are just some of the technologies that could benefit from their new discovery, which deals with "double-doped" polymers.
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Image: a green background with a new scale for electronegativity;  Copyright: Martin Rahm/Chalmers University of Technology

New scale for electronegativity rewrites the chemistry textbook


Electronegativity is one of the most well-known models for explaining why chemical reactions occur. Now, Martin Rahm from Chalmers University of Technology, Sweden, has redefined the concept with a new, more comprehensive scale.
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Image: Artist's depiction of the biodegradable pressure sensor wrapped around a blood vessel with the antenna off to the side ; Copyright: Levent Beker

Blood flow sensor: wireless, battery-free, biodegradable


A new device developed by Stanford University researchers could make it easier for doctors to monitor the success of blood vessel surgery.
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Image:Two men in front of a computer, one man sitting on a chair; Copyright: L. Brian Stauffer

Gaining control over soft-molecule synthesis


By gaining control over shape, size and composition during synthetic molecule assembly, researchers can begin to probe how these factors influence the function of soft materials.
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Image: In the sensor, gold nanodisks are arranged in squares, shown bottom-left; Copyright: V.K Valev and D.C Hooper

Ultra-sensitive sensor with gold nanoparticle array


Scientists from the University of Bath (UK) and Northwestern University (USA) have developed a new type of sensor platform using a gold nanoparticle array, which is 100 times more sensitive than current similar sensors.
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Image: Radiation warning sign and the word

New technique offers rapid assessment of radiation exposure


Researchers from North Carolina State University have developed a new technique that allows them to assess radiation exposure in about an hour using an insulator material found in most modern electronics. The technique can be used to triage medical cases in the event of a radiological disaster.
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Image: Yellow lines on a grey background; Copyright: Loncar Lab/HarvardSEAS

Programming light on a chip


Researchers from the Harvard John A. Paulson School of Engineering and Applied Sciences (SEAS) have developed a new integrated photonics platform that can store light and electrically control its frequency (or color) in an integrated circuit.
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Image: Visualization of data streams; Copyright:

Artificial intelligence advances threaten privacy of health data


Advances in artificial intelligence have created new threats to the privacy of people's health data, a new University of California, Berkeley, study shows.
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Image: Four silvery metal parts on a grey surface; Credit: Swanson School of Engineering

Optimizing tungsten carbide for 3D printing


Tungsten carbide is one of the most versatile metal compounds and is renowned for its durability and strength, making it perfect for cutting tools, boring machines, and surgical instruments. Although its use in additive manufacturing (AM), or 3D printing, would seem ideal, tungsten carbide is susceptible to fractures and breakage when exposed to the extreme laser melting process.
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Image: Close-up of skin with scars and healed wounds; Credit: ACS

E-bandage speeds wound healing in rats


Skin has a remarkable ability to heal itself. But in some cases, wounds heal very slowly or not at all, putting a person at risk for chronic pain, infection and scarring. Now, researchers have developed a self-powered bandage that generates an electric field over an injury, dramatically reducing the healing time for skin wounds in rats. They report their results in ACS Nano.
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