Integrating tunable quantum emitters with commercial photonic circuits is promising for quantum information applications but remains a challenge. Here the authors report integration of InAs/InP microchiplets containing quantum dot single photon emitters into a large-scale foundry silicon platform.
Are you ready to discover the future of AI with GPT-5? In this video, we’ll explore the latest upd…
Skild AI, a startup that’s developing artificial intelligence-powered brains for robots, said today it has closed on a bumper $300 million early-stage funding round, bringing its valuation to a cool $1.5 billion.
The Series A round was led by a host of top-tier venture capital firms, including Lightspeed Venture Partners, Coatue, Softbank Group Corp. and Jeff Bezos’s Bezos Expeditions. It also saw participation from the likes of Felicis Ventures, Sequoia, Menlo Ventures, General Catalyst, CRV, Amazon, SV Angel and Carnegie Mellon University.
Skild AI is building what it says is a “shared, general-purpose brain” that will be able to equip a diverse group of robots that can perform multiple kinds of tasks in a wide range of scenarios, such as manipulating objects, locomotion and navigation. It says its AI intelligence can be integrated with any kind of robot, including humanoid bots with advanced computer vision skills designed to perform dexterous manipulation of objects in the home and in industrial settings, and more resilient quadruped robots that can navigate any physical environment.
Lecture by Dr Jack Szostak, 2009 Nobel laureate in Physiology or Medicine, at the Molecular Frontiers Symposium \.
Scientists have for the first time observed how atoms in magnesium oxide morph and melt under ultra-harsh conditions, providing new insights into this key mineral within Earth’s mantle that is known to influence planet formation.
High-energy laser experiments — which subjected tiny crystals of the mineral to the type of heat and pressure found deep inside a rocky planet’s mantle — suggest the compound could be the earliest mineral to solidify out of magma oceans in forming “super-Earth” exoplanets.
“Magnesium oxide could be the most important solid controlling the thermodynamics of young super-Earths,” said June Wicks, an assistant professor of Earth and Planetary Sciences at Johns Hopkins University who led the research. “If it has this very high melting temperature, it would be the first solid to crystallize when a hot, rocky planet starts to cool down and its interior separates into a core and a mantle.”
Scientists at Weill Cornell Medicine discovered a previously unknown link between two key pathways that regulate the immune system in mammals — a finding that impacts our understanding of chronic inflammatory bowel diseases (IBD). This family of disorders severely impacts the health and quality of life of more than 2 million people in the United States.
The immune system has many pathways to protect the body from infection, but sometimes an overactive immune response results in autoimmune diseases including IBD, psoriasis, rheumatoid arthritis and multiple sclerosis. Interleukin-23 (IL-23) is one such immune factor that fights infections but is also implicated in many of these inflammatory diseases. However, it was unknown why IL-23 is sometimes beneficial, and other times becomes a driver of chronic disease.
In the study, published June 12 in Nature, the team found that IL-23 acts on group 3 innate lymphoid cells (ILC3s), a family of immune cells that are a first line of defense in mucosal tissues such as the intestines and lungs. In response, ILC3s increase activity of CTLA-4, a key regulatory factor that prevents the immune system from attacking the body and beneficial gut microbiota. This interaction critically balances the pro-inflammatory effects IL-23 to maintain gut health, but is impaired in IBD.
A self-driving lab system spent half a year engineering enzymes to work at higher temperatures.
Researchers at Finland’s Aalto University have found a way to use magnets to line up bacteria as they swim. The approach offers more than just a way to nudge bacteria into order – it also provides a useful tool for a wide range of research, such as work on complex materials, phase transitions and condensed matter physics.
The findings have been reported in Communications Physics (“Magnetically controlled bacterial turbulence”).
Bacterial cells generally aren’t magnetic, so the magnets don’t directly interact with the bacteria. Instead, the bacteria are mixed into a liquid with millions of magnetic nanoparticles. This means the rod-shaped bacteria are effectively non-magnetic voids inside the magnetic fluid. When the magnets are switched on, creating a magnetic field, the bacteria are nudged to line up with the magnetic field because any other arrangement takes more energy – it’s harder to keep the rod-shaped holes at an angle to the magnetic field.
Awarded the 2023 Nobel Prize in Chemistry, quantum dots have a wide variety of applications ranging from displays and LED lights to chemical reaction catalysis and bioimaging. These semiconductor nanocrystals are so small – on the order of nanometers – that their properties, such as color, are size dependent, and they start to exhibit quantum properties. This technology has been really well developed, but only in the visible spectrum, leaving untapped opportunities for technologies in both the ultraviolet and infrared regions of the electromagnetic spectrum.
In new research published in Nature Synthesis (“Interdiffusion-enhanced cation exchange for HgSe and HgCdSe nanocrystals with infrared bandgaps”), University of Illinois at Urbana-Champaign bioengineering professor Andrew Smith and postdoctoral researcher Wonseok Lee have developed mercury selenide (HgSe) and mercury cadmium selenide (HgCdSe) nanocrystals that absorb and emit in the infrared, made from already well-developed, visible spectrum cadmium selenide (CdSe) precursors. The new nanocrystal products retained the desired properties of the parent CdSe nanocrystals, including size, shape and uniformity.
“This is the first example of infrared quantum dots that are at the same level of quality as the ones that are in the visible spectrum,” Smith says.
Gallium nitride (GaN)-based light-emitting diodes (LEDs) have transformed the lighting industry by replacing conventional lighting technologies with superior energy efficiency, longer operating life and greater environmental sustainability.
In recent years, considerable attention has been paid to the trend toward miniaturization of LEDs, driven by display devices, augmented reality, virtual reality, and other emerging technologies. Due to the lack of cost-effective native substrates, the presence of high threading dislocation density in heteroepitaxial films grown on sapphire substrate is a major limiting factor for device performance.
In addition, Fresnel reflections at the interface between epitaxy and substrate caused by abrupt changes in the refractive indices of the material reduce the light energy utilization.
