/ en-us Â鶹ÒùÔº internet news portal provides the latest news on science including: Â鶹ÒùÔºics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine. Strontium titanate was once used as a diamond substitute in jewelry before less fragile alternatives emerged in the 1970s. Now, researchers have explored some of its more unusual properties, which might someday be useful in quantum materials and microelectronics applications. /news/2025-05-strained-strontium-titanate-membrane-ferroelectric.html Condensed Matter Quantum Â鶹ÒùÔºics Thu, 29 May 2025 15:55:04 EDT news667752901 Researchers have developed an extremely thin, flexible imager that could be useful for noninvasively acquiring images from inside the body. The new technology could one day enable early and precise disease detection, providing critical insights to guide timely and effective treatment. /news/2025-05-flexible-imager-thinner-eyelash-capture.html Optics & Photonics Mon, 19 May 2025 16:10:01 EDT news666889444 Opaque materials can transmit light when excited by a high-intensity laser beam. This process, known as optical bleaching, induces a nonlinear effect that temporarily alters the properties of a material. Remarkably, when the laser is switched on and off at ultrahigh speeds, the effect can be dynamically controlled, opening new possibilities for advanced optical technologies. /news/2025-04-multivalley-semiconductor-enables-optical-germanium.html Condensed Matter Optics & Photonics Wed, 16 Apr 2025 12:12:04 EDT news664024321 Just a few years ago, researchers discovered that changing the angle between two layers of graphene, an atom-thick sheet of carbon, also changed the material's electronic and optical properties. They then learned that a "twist" of 1.1 degrees—dubbed the "magic" angle—could transform this metallic material into an insulator or a superconductor, a finding that ignited excitement about a possible pathway to new quantum technologies. /news/2024-08-world-micromachine-2d-materials.html Nanophysics Nanomaterials Thu, 22 Aug 2024 10:00:03 EDT news643539601 The so-called Casimir force or Casimir effect is a quantum mechanical phenomenon resulting from fluctuations in the electromagnetic field between two conducting or dielectric surfaces that are a short distance apart. Studies have shown that this force can be either be attractive or repulsive, depending on the dielectric and magnetic properties of the materials used in experiments. /news/2024-06-method-reversibly-casimir-external-magnetic.html Condensed Matter Quantum Â鶹ÒùÔºics Tue, 18 Jun 2024 07:30:01 EDT news637857959 Research teams led by Prof. Zeng Changgan and Zhang Hui from the Hefei National Laboratory for Â鶹ÒùÔºical Sciences at the Microscale, the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences have achieved a reversible transition from the Casimir attraction to repulsion under magnetic field control by using a magnetic fluid as an intermediate medium. Their study is published in Nature Â鶹ÒùÔºics. /news/2024-06-tune-casimir-magnetic-fields.html Condensed Matter Quantum Â鶹ÒùÔºics Thu, 13 Jun 2024 11:07:02 EDT news637495621 Lighting a gas grill, getting an ultrasound, using an ultrasonic toothbrush—these actions involve the use of materials that can translate an electric voltage into a change in shape and vice versa. /news/2024-05-high-alternative-conventional-ferroelectrics.html Condensed Matter Thu, 23 May 2024 17:28:04 EDT news635704081 Programmable photonic integrated circuits (PPICs) process light waves for computation, sensing, and signaling in ways that can be programmed to suit diverse requirements. Researchers at Daegu Gyeongbuk Institute of Science and Technology (DGIST), in South Korea, with collaborators at Korea Advanced Institute of Science and Technology (KAIST), have achieved a major advance in incorporating microelectromechanical systems into PPICs. /news/2024-02-key-photonic-components-supercomputing-technology.html Optics & Photonics Mon, 05 Feb 2024 09:44:03 EST news626348641 Nearly 70 years after the launch of the first satellite, we still have more questions than answers about space. But a team of Berkeley researchers is on a mission to change this with a proposal to build a fleet of low-cost, autonomous spacecraft, each weighing only 10 grams and propelled by nothing more than the pressure of solar radiation. These miniaturized solar sails could potentially visit thousands of near-Earth asteroids and comets, capturing high-resolution images and collecting samples. /news/2024-01-qa-small-solar-giant-interplanetary.html Space Exploration Fri, 19 Jan 2024 10:33:05 EST news624882781 A multidisciplinary team of researchers from Skoltech has discovered the resonance frequencies of diatom frustules. These intricately structured silicon dioxide shells of single-celled microalgae provide a promising model for nature-inspired electronic and optical devices, such as tiny ultrasound detectors for advanced medical imaging and components for ultrafast signal processing in microchips of the future. /news/2023-12-glassy-shell-microscopic-algae-tiny.html Optics & Photonics Wed, 13 Dec 2023 12:14:34 EST news621692071 Bulk acoustic resonators—stacked material structures inside which acoustic waves resonate—can be used to amplify sounds or filter out undesired noise. These resonators have found wide use in today's RF telecommunication, like Front-End Modules (FEM) in iPhones. They could also be valuable components for various cutting-edge scientific applications, including quantum technologies and imaging devices. /news/2023-10-strategy-spin-acoustic-silicon-vacancies-4h.html Condensed Matter Quantum Â鶹ÒùÔºics Fri, 20 Oct 2023 07:00:02 EDT news616933556 A team of researchers led by Academician DU Jiangfeng from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS) has made a significant breakthrough in exploring exotic spin interactions. They successfully utilized solid-state spin quantum sensors based on nitrogen-vacancy (NV) centers in diamond to investigate these interactions at the microscale. /news/2023-09-exploring-exotic-interactions-microscale-solid-state.html Quantum Â鶹ÒùÔºics Wed, 27 Sep 2023 11:51:49 EDT news615034306 Diagnosing and treating gastrointestinal tract diseases can be notoriously invasive and time-consuming: blood and stool lab work; biopsies, colonoscopies and endoscopies; and X-rays, CT scans and MRI imaging. But what if there was an alternative as simple as popping a Bayer aspirin? /news/2023-05-ingestible-capsule-gi-tract-diseases.html Bio & Medicine Mon, 29 May 2023 09:43:48 EDT news604572224 Microelectromechanical systems (MEMS) involve the use and development of micron-sized electrical devices such as microelectrodes, sensors, and actuators that are integrated into computer and smartphone chips. Fabricating such integrated MEMS devices is usually a challenging task as these devices often deviate from their original design owing to the defects introduced during their fabrication and operation. This, in turn, limits their performance. Therefore, it is crucial to identify and rectify these defects. /news/2023-03-visualizing-spatial-electric-properties-microscales.html Analytical Chemistry Materials Science Thu, 23 Mar 2023 10:30:02 EDT news598785836 Sometimes friction is good, such as the friction between a road and a car's tires to prevent the vehicle from skidding. But sometimes friction is bad—if you did not put oil in that very same car, there would be so much friction in the bearings of the engine that the car could not operate. /news/2023-01-humidity-key-super-lubricity.html Nanomaterials Tue, 10 Jan 2023 12:17:04 EST news592575422 Lasers find applications across several fields ranging from telecommunications and remote sensing to medicine. There are many ways in which one can generate laser emission, or lasing, from a device or material. Consequently, there are many types of lasers with different principles of operation. /news/2023-01-playing-angles-high-contrast-direction-tunable-lasing.html Optics & Photonics Tue, 03 Jan 2023 14:45:08 EST news591979499 Today, lasers are well-established in daily life, even if it is sometimes hard to tell what and where they are. As an example, we can find them in CD/DVD readers or medical applications like cancer and eye surgery, being essential tools in a vast range of multidisciplinary fields. All of this is the result of constant progress and development, from the first Maiman's ruby laser (1960) to the attosecond lasers, passing through exotic, funny demonstrations like Jell-O lasers. /news/2022-12-lasers-bond-semiconductor-electronics-components.html Optics & Photonics Mon, 05 Dec 2022 08:29:48 EST news589451374 In recent years, global digitalization has seen unprecedented acceleration. Video streaming and video conferencing in home office and remote learning settings has resulted in a spike in residential broadband usage. Emerging applications such as artificial intelligence and autonomous vehicles will further accelerate the need for data communication in the future. Today's internet infrastructure is built on fiber-optic communications, but how can the fiber-optic communication systems be made more efficient to fulfill future digital communication needs? /news/2022-11-silicon-photonic-microelectromechanical.html Optics & Photonics Mon, 07 Nov 2022 16:26:03 EST news587060761 An international group of researchers has measured how much a laser beam tugs on the water it shines through. /news/2022-04-unveiling-bulk-surface-dielectric-liquid.html Optics & Photonics Wed, 20 Apr 2022 12:35:26 EDT news569676923 In a new report now published in Science Advances, Andrey Jarmola and an international research team in physics and materials in the U.S. and Germany demonstrated the function of a rotation sensor based on the Nitrogen-14 (14N) nuclear spins intrinsic to nitrogen-vacancy color centers in diamond. Nitrogen vacancy color centers are formed by nitrogen impurities that sit next to a missing carbon in diamond. The sensor used optical polarization and readout of the nuclei and a radiofrequency double-quantum pulse protocol to monitor the 14N nuclear spin precession. Rotation sensors or gyroscopes are typically used for navigation and automotive guidance. Among commercial sensors including mechanical gyroscopes and microelectromechanical systems, emerging techniques include nuclear magnetic resonance (NMR) gyroscopes. These sensors can surpass commercial devices within the next decade relative to accuracy, robustness and miniaturization. /news/2021-11-diamond-nuclear-gyroscope.html Quantum Â鶹ÒùÔºics Fri, 05 Nov 2021 09:56:27 EDT news555324981 Optical metasurfaces can unprecedently regulate versatile wavefronts at the subwavelength scale. Most well-established optical metasurfaces are, however, static and feature well-defined optical responses that are determined by optical metasurface configurations set during their development. The dynamic configurations of the materials investigated so far often show specific limitations and reduced reconfigurability. In a new report now published on Science Advances, Chao Meng and a research team in nanotechnology, nano-optics, and electronics in Denmark, Norway and China, combined a thin-film piezoelectric micromechanical system (MEMS) with a gap-surface plasmon-based optical metasurface (OMS). Using the setup, they developed an electrically driven, dynamic microelectromechanical system-optical metasurface platform to regulate phases alongside amplitude modulations of the reflected light by finely actuating the MEMS mirror. Using this platform, they showed how the components afforded polarization-independent beam steering and two-dimensional focusing with high modulation efficiencies and fast responses. The platform offers flexible solutions to realize complex dynamics of 2D wavefront regulations with applications in reconfigurable and adaptive optical networks and systems. /news/2021-07-piezoelectric-microelectromechanical-system-based-optical-metasurfaces.html Optics & Photonics Mon, 05 Jul 2021 08:00:01 EDT news544689983 Accelerometers in mobile phones, microprocessors in laptops, and gyroscopes that balance drones each rely on microelectromechanical systems, or MEMS for short. Within these small systems are even smaller devices, called actuators and sensors, that perform various physical functions.   /news/2021-06-tantalizing-tantalum-mems-thermal-actuators.html Nanophysics Fri, 25 Jun 2021 13:11:26 EDT news543845483 Hydrodynamic cavitation is a major phase change phenomena that can occur with a sudden decrease in the local static pressure within a fluid. The emergence of microelectromechanical systems (MEMS) and high-speed microfluidic devices have attracted considerable attention with implementations in many fields including cavitation applications. In a new study now on Nature: Microsystems and Nanoengineering, Farzad Rokhsar Talabazar and colleagues in Istanbul Turkey, Sweden and Switzerland proposed a new generation of cavitation-on-a-chip devices with eight parallel structured microchannels. The team used water and a poly vinyl alcohol (PVA) microbubble suspension as the working fluids in the device. The features of the next-generation cavitation-on-a-chip instrument have applications across microfluidic or organ-on-a-chip devices for integrated drug release and tissue-engineering applications. /news/2021-06-cavitation-on-a-chip-device-multiple-microchannel-configuration.html Nanophysics Nanomaterials Mon, 21 Jun 2021 09:40:01 EDT news543485115 Researchers have developed new X-ray optics that can be used to harness extremely fast pulses in a package that is significantly smaller and lighter than conventional devices used to modulate X-rays. The new optics are based on microscopic chip-based devices known as microelectromechanical systems (MEMS). /news/2021-04-optics-on-a-chip-device-paves-capturing-fast.html Optics & Photonics Tue, 20 Apr 2021 17:19:56 EDT news538157942 Hafnium-based thin films, with a thickness of only a few nanometres, exhibit an unconventional form of ferroelectricity. This allows the construction of nanometre-sized memories or logic devices. However, it was not clear how ferroelectricity could occur at this scale. A study that was led by scientists from the University of Groningen showed how atoms move in a hafnium-based capacitor: migrating oxygen atoms (or vacancies) are responsible for the observed switching and storage of charge. The results, which were published online by the journal Science on 15 April, point the way to new ferroelectric materials. /news/2021-04-oxygen-migration-enables-ferroelectricity-nanoscale.html Nanomaterials Fri, 16 Apr 2021 08:40:30 EDT news537781226 Anyone who has ever experienced "butterflies in the stomach" before giving a big presentation won't be surprised to learn there is an actual physical connection between their gut and their brain. Neuroscientists and medical professionals call this the "gut-brain-axis" (GBA). A better understanding of the GBA could lead to treatments and cures for neurological mood disorders like depression and anxiety, as well as for a range of chronic auto-immune inflammatory diseases like irritable bowel syndrome (IBS) and rheumatoid arthritis (RA). /news/2020-10-symptoms-heador-gut.html Bio & Medicine Nanomaterials Thu, 15 Oct 2020 15:27:22 EDT news521994426 Femtosecond lasers can be integrated with electron microscopes to directly image transient structures and morphologies in materials in real time and space. In a new report, Xuewen Fu and a team of scientists in condensed matter physics, microsystems, nanotechnology and materials science in China and the U.S. developed a laser-free ultrafast electron microscope (UEM) offering similar potential but without the requisite femtosecond lasers or elaborate instrumental modifications. The team created picosecond electron pulses to probe dynamic events by chopping a continuous beam with a radiofrequency (RF)-driven pulser with a pulse repetition rate tunable from 100 MHz to 12 GHz. They studied gigahertz electromagnetic wave propagation dynamics as an application for the first time in this work and revealed the transient oscillating electromagnetic field on nanometer space and picosecond time scales with time-resolved polarization, amplitude and local field enhancement. The study showed the use of laser-free, ultrafast electron microscopy (UEM) in real-space visualization for multidisciplinary research—specifically in electrodynamic devices associated with information processing technology. The research work is now published in Science Advances. /news/2020-10-visualization-electromagnetic-dynamics-laser-free-ultrafast.html General Â鶹ÒùÔºics Mon, 12 Oct 2020 09:20:01 EDT news521454410 NIMS, HUE and HUSM have developed a method of easily and cheaply producing an adhesive structure capable of repeated attachment and detachment. The design of this structure was inspired by the adhesive spatula-shaped hairs (setae) found on the footpads of flies, while the method of producing it was hinted at by seta formation in fly pupae. These environmentally sound technologies could potentially contribute to a more sustainable society. /news/2020-08-low-cost-footpad-like-adhesive-capable-attachmentdetachment.html Materials Science Fri, 28 Aug 2020 07:41:46 EDT news517819302 Piezoelectric materials can convert electrical voltage to mechanical displacement and vice versa. They are ubiquitous in modern wireless communication networks such as in cellphones. Today, piezoelectric devices, including filters, transducers and oscillators, are used in billions of devices for wireless communications, global positioning, navigations, and space applications. /news/2020-07-shaking-light-with-sound.html Optics & Photonics Wed, 15 Jul 2020 12:19:48 EDT news514034383 EPFL researchers have developed a high-precision technology that enables them to carve nanometric patterns into two-dimensional materials. /news/2020-06-nanometer-sized-patterns-d-materials.html Nanomaterials Tue, 23 Jun 2020 14:04:42 EDT news512139879