Standing in a full-body scanner at an airport isn’t fun, and the process adds time and stress to a journey. It also raises privacy concerns. But researchers now report making several key advances in terahertz wave sensor technology to create a more precise and direct method for using these waves to detect explosives from greater distances.
It's not quite the bionics of science fiction, but...
Research from a team led by North Carolina State Univ. is opening the door to smarter sensors by...
Diamonds may be a girl’s best friend, but they could also one day help us understand how the brain processes information, thanks to a new sensing technique developed at Massachusetts Institute of Technology (MIT). A team in MIT’s Quantum Engineering Group has developed a new method to control nanoscale diamond sensors, which are capable of measuring even very weak magnetic fields.
Some may think of turkeys as good for just lunch meat and holiday meals, but bioengineers at the Univ. of California (UC), Berkeley saw inspiration in the big birds for a new type of biosensor that changes color when exposed to chemical vapors. This feature makes the sensors valuable detectors of toxins or airborne pathogens.
Researchers in California have created tactile sensors from composite films of carbon nanotubes and silver nanoparticles similar to the highly sensitive whiskers of cats and rats. These new e-whiskers respond to pressure as slight as a single Pascal, about the pressure exerted on a table surface by a dollar bill.
Superconducting quantum interference devices (SQUIDs) are incredibly sensitive magnetic flux sensors which have been limited in their applications because of thermal challenges at ultralow temperatures. Researchers in the U.K. have succeeded in overcoming this difficulty by introducing a new type of nanoscale SQUID based on optimized proximity effect bilayers.
Falls are a major problem for the elderly. Each year, one-third of adults over age 65 experience a fall, and one-third of those falls impact health and autonomy. The Swiss spin-off Gait Up just put an extremely thin motion sensor on the market which can detect the risk of a fall in an older person and is equally useful for sports and physical therapy.
The sensors team at the National Energy Technology Laboratory is working on sensor technologies to enable embedded gas sensing at high temperature. Through a combination of theoretical simulations and experiments, the team has demonstrated that transparent conducting oxides such as aluminum-doped zinc oxide show significant promise for high-temperature optical gas sensing in the near‑infrared wavelength range.
Buried under thousands of miles of pavement in California are 27,000 traffic sensors that are supposed to help troubleshoot both daily commutes and long-term maintenance needs on some of the nation's most heavily used and congested roadways. About 9,000 of them do not work, despite their critical role in an "intelligent transportation" system designed to do things like detect the congestion that quickly builds after an accident.
Researchers at the University of Iowa have created a bio patch to regenerate missing or damaged bone by putting DNA into a nano-sized particle that delivers bone-producing instructions directly into cells. The bone-regeneration kit relies on a collagen platform seeded with particles containing the genes needed for producing bone.
Physicists at the National Institute of Standards and Technology (NIST) have demonstrated a compact atomic clock design that relies on cold rubidium atoms instead of the usual hot atoms, a switch that promises improved precision and stability.
Nitric oxide (NO) is one of the most important signaling molecules in living cells, carrying messages within the brain and coordinating immune system functions. In many cancerous cells, levels are perturbed, but very little is known about how NO behaves in both healthy and cancerous cells. Until now.
Researchers at Purdue Univ. are developing a method to mass-produce a new type of nanomaterial for advanced sensors and batteries, with an eye toward manufacturing in the Midwest. Research findings indicate the material shows promise as a sensor for detecting glucose in the saliva or tears and for "supercapacitors" that could make possible fast-charging, high-performance batteries.
People often customize the size and shape of materials like textiles and wood without turning to specialists like tailors or carpenters. In the future this should be possible with electronics, according to computer scientists who have developed a printable multi-touch sensor whose shape and size can be altered by anybody.
Crop growers can benefit from water sensors for accurate, steady and numerous moisture readings. But current sensors are large, may cost thousands of dollars and often must be read manually. Now, Cornell Univ. researchers have developed a microfluidic water sensor within a fingertip-sized silicon chip that is a hundred times more sensitive than current devices.
To gauge whether suspects involved in accidents or routine traffic stops have been driving drunk, police officers pair field sobriety tests with breathalyzers. Most breathalyzers are expensive and unable to test for precise concentrations of alcohol. Offering a better solution, Italian researchers have developed a novel idea for an inexpensive, portable breathalyzer.
Rice Univ. scientists took a lesson from craftsmen of old to assemble microscopic compounds that warn of the presence of dangerous fumes from solvents. The researchers combined a common mineral, zeolite, with a metallic compound based on rhenium to make an “artificial nose” that can sniff out solvent gases.
Researchers in Japan have developed a new photodiode that can detect in just milliseconds a certain type of high-energy ultraviolet light, called UVC, which is powerful enough to break the bonds of DNA and harm living creatures. The new device shows promise for space-based communication and monitoring ozone depletion.
Researchers in Germany are showing the way toward low-cost, industrial-scale manufacturing of a new family of electronic devices. Gas sensors that could be integrated into food packaging to gauge freshness, new types of solar cells and flexible transistors, and sensors that could be built into electronic skin: All can be made with carbon nanotubes, sprayed like ink onto flexible plastic sheets or other substrates.
A team from Queen’s Univ. has found a way to “feel” the surface of silicon molecules at the molecular level. This new “sense of touch” could mean a solution to the long-standing problem of producing clear images of silicon surfaces with a scanning tunneling microscope. Closely examining silicon surfaces has become increasingly important over the years as nearly all microelectronic devices are made from silicon-containing microchips.
The origin of cosmic rays in the universe has confounded scientists for decades. But a study by researchers using data from the IceCube Neutrino Observatory at the South Pole reveals new information that may help unravel the longstanding mystery of exactly how and where these “rays”, which are actually high-energy particles, are produced.
Using carbon nanotubes, a research team in Switzerland and California has developed a sensor that greatly amplifies the sensitivity of commonly used but typically weak vibrational spectroscopic methods, such as Raman spectroscopy. This type of sensor makes it possible to detect molecules present in the tiniest of concentrations.
With a series of quick blasts and a cloud of dust a 13-story building on the Cal State-East Bay campus crashed to the ground Saturday morning as scientists monitored the impact on the nearby Hayward Fault. U.S. Geological Survey scientists had placed more than 600 seismographs in concentric circles within a mile of the building to pick up the vibrations and verify whether their predictions were correct.
Carbon monoxide poisoning is a significant problem for construction workers because it can build up quickly in enclosed spaces from use of gasoline-powered tools. New research calls for the use of a wearable computing system installed in a helmet to protect construction workers from this type of poisoning.
A new biosensor, applied to the human skin like a temporary tattoo, can alert marathoners, competitive bikers and other “extreme” athletes that they’re about to “bonk,” or “hit the wall.” The study describes the first human tests of the sensor, which also could help soldiers and others who engage in intense exercise.
Researchers in Switzerland have designed prototype for an image sensor based on the semiconducting properties of molybdenite. Their sensor only has a single pixel, but it needs five times less light to trigger a charge transfer than the silicon-based sensors that are currently available.
On Monday, the National Academy of Sciences announced a three-year grant to chemist Vincent Rotello at the University of Massachusetts Amherst to develop, test and deploy new, sensitive, reliable and affordable inkjet-printed, nanoparticle-based test strips for detecting disease-causing bacteria in drinking water.
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