Physics

Acoustic device makes piezoelectrics sing to a different tune

In today's "internet of things," devices connect primarily over short ranges at high speeds, an environment in which surface acoustic wave (SAW) devices have shown promise for years, resulting in the shrinking size of your smartphone. To obtain ever faster speeds, however, SAW devices need to operate at higher frequencies, which limits output power and can deteriorate overall performance. A new SAW device looks to provide a path forward for these devices to reach even higher frequencies.

Using DNA strands to design new polymer materials

Researchers have chemically imprinted polymer particles with DNA strands -- a technique that could lead to new materials for applications ranging from biomedicine to the promising field of 'soft robotics.'

Technique makes NMR more useful for nanomaterials, exotic matter research

Researchers show how nuclear magnetic resonance probes can be optimized for studying the properties of nanomaterials and strange states of matter.

Technique makes NMR more useful for nanomaterials, exotic matter research

Nuclear magnetic resonance (NMR) is a powerful scientific tool used in medical imaging and in probing the chemical structure of molecules and compounds. New research from Brown University shows a technique that helps adapt NMR to study the physical properties of thin films, two-dimensional nanomaterials and exotic states of matter.

New measurements to guide radiation therapy

When ionizing radiation passes through living tissue, it interacts with molecules present in the cells, stripping away electrons and producing charged species known as ions. Ionizing radiation used for cancer treatment includes gamma rays, X-rays and energetic particles such as alpha and beta rays.

New type of quantum material

Physicists searching for an explanation for high-temperature superconductivity were surprised when their theoretical model pointed to the existence of a never-before-seen material in a different realm of physics -- that of topological quantum materials.

Researchers steer the flow of electrical current with spinning light

Light can generate an electrical current in semiconductor materials. This is how solar cells generate electricity from sunlight and how smart phone cameras can take photographs. To collect the generated electrical current, called photocurrent, an electric voltage is needed to force the current to flow in only one direction.

Major technology developments boost LCLS X-ray laser's discovery power

Accelerator experts at the Department of Energy's SLAC National Accelerator Laboratory are developing ways to make the most powerful X-ray laser better than ever. They have created the world's shortest X-ray pulses for capturing the motions of electrons, as well as ultra-high-speed trains of X-ray pulses for "filming" atomic motion, and have developed "smart" computer programs that maximize precious experimental time.

Quantum trick blocks background 'chatter' in sensing devices

A new protocol has solved a common problem in quantum sensing devices, which should enable a new generation of ultra-sensitive sensors with application in medical imaging and defense.

'Weyl-Kondo semimetal': Physicists discover new type of quantum material

U.S. and European physicists searching for an explanation for high-temperature superconductivity were surprised when their theoretical model pointed to the existence of a never-before-seen material in a different realm of physics: topological quantum materials.

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