An official website of the United States government.
Scientists at the U.S. Department of Energy’s Argonne National Laboratory have made and tested a superconducting nanowire device applicable to high-speed photon counting for nuclear physics experiments that were previously thought impossible. The device operates at temperatures near absolute zero in magnetic fields 40 times stronger than previous such devices and can detect low-energy photons and other fundamental particles.
Scientists at the U.S. Department of Energy’s Argonne National Laboratory have made and tested a superconducting nanowire device applicable to high-speed photon counting for nuclear physics experiments that were previously thought impossible. The device operates at temperatures near absolute zero in magnetic fields 40 times stronger than previous such devices and can detect low-energy photons and other fundamental particles.
Through a technique known as DNA origami, scientists at Emory University have created the fastest, most persistent DNA nano motor yet. The new DNA motor is rod-shaped and uses RNA fuel to roll persistently in a straight line, without human intervention, at speeds up to 100 nanometers per minute. That's up to 10 times faster than previous DNA motors.
Through a technique known as DNA origami, scientists at Emory University have created the fastest, most persistent DNA nano motor yet. The new DNA motor is rod-shaped and uses RNA fuel to roll persistently in a straight line, without human intervention, at speeds up to 100 nanometers per minute. That's up to 10 times faster than previous DNA motors.
Blood tests can measure levels of cortisol, often called the “stress hormone,” in the body. But a blood test can raise a person’s stress level itself, and it can’t be done frequently, nor without a medical professional. Now researchers at Caltech are reporting on the first noninvasive, wearable sensor that can detect changes in cortisol levels directly from sweat in the skin. It’s made of graphene, a layer of carbon only one layer thick that has tiny holes throughout. These holes contain cortisol antibodies that bind to the cortisol in sweat, and this can be detected electronically by the sensor.
Blood tests can measure levels of cortisol, often called the “stress hormone,” in the body. But a blood test can raise a person’s stress level itself, and it can’t be done frequently, nor without a medical professional. Now researchers at Caltech are reporting on the first noninvasive, wearable sensor that can detect changes in cortisol levels directly from sweat in the skin. It’s made of graphene, a layer of carbon only one layer thick that has tiny holes throughout. These holes contain cortisol antibodies that bind to the cortisol in sweat, and this can be detected electronically by the sensor.
Engineers at the University of California San Diego and the University of California Berkeley have created light-based technology that can detect biological substances with a molecular mass more than 100 times smaller than previously possible. The researchers used plasmons, which are small fluids of electronic waves that can move back and forth in metallic nanostructures. The research could lead to the development of ultra-sensitive devices that can quickly detect pathogens in human blood and considerably reduce the time needed for patients to get results from blood tests.
Engineers at the University of California San Diego and the University of California Berkeley have created light-based technology that can detect biological substances with a molecular mass more than 100 times smaller than previously possible. The researchers used plasmons, which are small fluids of electronic waves that can move back and forth in metallic nanostructures. The research could lead to the development of ultra-sensitive devices that can quickly detect pathogens in human blood and considerably reduce the time needed for patients to get results from blood tests.
Scientists at Johns Hopkins Medicine have designed and successfully tested an experimental, super-small package able to deliver molecular signals that tag implanted human cancer cells in mice and make them visible for destruction by the animals' immune systems. The team created polymer-based nanoparticles and injected them into the animals' tumors. Once inside a cancer cell, the water-soluble nanoparticle slowly degrades over a day and releases a ring of DNA that makes the cancer cell produce surface proteins that work like red flags to say, "I'm a cancer cell, activate defenses."
Scientists at Johns Hopkins Medicine have designed and successfully tested an experimental, super-small package able to deliver molecular signals that tag implanted human cancer cells in mice and make them visible for destruction by the animals' immune systems. The team created polymer-based nanoparticles and injected them into the animals' tumors. Once inside a cancer cell, the water-soluble nanoparticle slowly degrades over a day and releases a ring of DNA that makes the cancer cell produce surface proteins that work like red flags to say, "I'm a cancer cell, activate defenses."
