Category Physics

This 3D Printer can Watch Itself Fabricate Objects

Rendering shows a six-legged robot, standing against a black background, in the process of being 3D-printed. Near the back of the robot, floating black spheres are assembled and then cured by a blue UV light beaming down from above. On top, cameras point down to scan the action.
Caption: This rendering shows a robot being built layer-by-layer using the new process. The black spheres represent the material that the printer uses. The material is then cured by UV light, represented in blue. At the top of the image are the cameras that scan the procedure and adjust accordingly.
Credits:Image: Moritz Hocher

Computer vision enables contact-free 3D printing, letting engineers print with high-performance materials they couldn’t use before. With 3D inkjet printing systems, engineers can fabricate hybrid structures that have soft and rigid components, like robotic grippers that are strong enough to grasp heavy objects but soft enough to interact safely with humans.

These multimaterial 3D printing systems utilize thousands of nozzles to deposit tiny droplets of resin, ...

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Integrated Circuits based on a 2D Semiconductor Operating at GHz Frequencies

Integrated circuits based on a 2D semiconductor operating at GHz frequencies
High-performance MoS2 ring oscillator based on air-gap device structures. Credit: Fan et al

Transistors are crucial electronic components that regulate, amplify and control the flow of current inside most existing devices. In recent years, electronics engineers have been trying to identify materials and design strategies that could help to further improve the performance of transistors, while also reducing their size.

Two-dimensional (2D) transition metal dichalcogenides have some advantageous properties that could help to enhance the capabilities of transistors. While past studies have demonstrated the potential of these materials in individual transistors, their use for developing entire integrated circuits (ICs) that operate at high frequencies has proved challenging.

Researc...

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Tracking down Quantum Flickering of the Vacuum

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The X-ray beam from the world’s largest X-ray laser, the European XFEL, only becomes as clearly visible as in the photo in complete darkness and with an exposure time of 90 seconds. In 2024, the first experiments to detect quantum fluctuations in vacuum will take place here. Source: European XFEL/Jan Hosan

HZDR team proposes improvements for an experiment designed to explore the limits of physics. Absolutely empty – that is how most of us envision the vacuum. Yet, in reality, it is filled with an energetic flickering: the quantum fluctuations. Experts are currently preparing a laser experiment intended to verify these vacuum fluctuations in a novel way, which could potentially provide clues to new laws in physics...

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Solar-Powered Device produces Clean Water and Clean Fuel at the Same Time

Device for making solar fuels on the River Cam near the Bridge of Sighs

A floating, solar-powered device that can turn contaminated water or seawater into clean hydrogen fuel and purified water, anywhere in the world, has been developed by researchers.

The device, developed by researchers at the University of Cambridge, could be useful in resource-limited or offgrid environments, since it works with any open water source and does not require any outside power.

It takes its inspiration from photosynthesis, the process by which plants convert sunlight into food. However, unlike earlier versions of the ‘artificial leaf’, which could produce green hydrogen fuel from clean water sources, this new device operates from polluted or seawater sources and can produce clean drinking water at the same time.

Tests of the device showed it was able to produce cl...

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