Molecular Electronics Chip With 100 Million DNA Reading Devices

Next Big Future  December 30, 2019 Utilizing advances in semiconductor technology, nano-fabrication and bio-sensors, a company in America has created standard CMOS chips that directly integrate sensor molecules into the CMOS integrated circuits. The current chip is designed to read DNA; future chips will be designed for protein detection and other diverse bio-sensing applications. It reduces whole genome sequencing from days to minutes, through direct electrical sensing delivered at the speed of natural DNA synthesis. Using a single molecule workflow eliminates the time and complexity of sample preparation, delivering ultimate simplicity, speed and lower costs. This also improves the data […]

A fast and inexpensive device to capture and identify viruses

EurekAlert  December 23, 2019 Currently, virologists estimate that 1.67 million unknown viruses are in animals, a number of which can be transmitted to humans. A team of researchers in the US (Pennsylvania State University, New York University) synthesized a gradient of aligned carbon nanotube forest arrays to capture different viruses and detect them in-situ Raman spectroscopy to identify the viruses based on their individual vibration. They designed and assembled a portable platform that enriches virus particles from several milliliters of clinical samples in a couple of minutes. They added gold nanoparticles to enhance the Raman signal to detect the virus […]

Mathematicians propose new design for wireless nanosensory networks

Phys.org  December 17, 2019 An international team of researchers (Finland, Russia) has developed a new method for collecting data from passive wireless nanosensors using devices which can measure the parameters of objects and convert them into a signal. They use microscopic nanoelements and do not have an integral battery pack. They do not require any maintenance, have a long service life and low cost. Mathematicians have modeled an experiment with gateways, which are made on the basis of unmanned aircraft. THz frequency range is used for the wireless energy transfer to nanodevices as well as for communication with them. The […]

Thunderquakes make underground fiber optic telecommunications cables hum

Science Daily  December 11, 2019 Researchers at Pennsylvania State University report on a distributed acoustic sensing (DAS) array using preexisting underground fiber optics beneath the Penn State campus for detecting and characterizing thunder‐induced ground motions. During a half‐hour interval in State College, PA, they identified 18 thunder‐induced seismic events in the DAS array data. The high‐fidelity DAS data show that the thunder‐induced seismic are very broadband, with their peak frequency ranging from 20 to 130 Hz. The dense DAS data enable them to simulate thunder‐seismic wave propagation and full waveform synthetics and further locate the thunder‐seismic source by time‐reversal migration. […]

Black silicon can help detect explosives

EurekAlert  November 27, 2019 Detection of nitroaromatic compounds (NAC) vapors is challenging owing to their low vapor pressure and relatively weak sensitivity of the existing detection techniques. An international team of researchers (Russia, Australia) proposes a novel concept to design fluorescence (FL) detection platforms based on chemical functionalization of nanotextured dielectric surfaces exhibiting resonant light absorption, trapping, and localization effects. They demonstrated the sensor with selective FL-quenching response from monolayers of carbazole moieties covalently bonded to a spiky silicon surface, “black” silicon. It provided unprecedented ppt (10–12) range limits of detection for several NAC vapors. The easy-to-implement scalable fabrication procedure […]

Advancing nuclear detection and inspection

MIT News  November 14, 2019 Previously proposed solutions lacked the combination of isotopic sensitivity and information security. Researchers at MIT present the experimental feasibility proof of a technique that uses neutron induced nuclear resonances that is sensitive to the combination of isotopics and geometry. The information is physically encrypted to prevent the leakage of sensitive information. The approach can significantly increase the trustworthiness of future arms control treaties while expanding their scope to include the verified dismantlement of nuclear warheads themselves…read more. Open Access TECHNICAL ARTICLE

Carnegie Mellon system locates shooters using smartphone video

Eurekalert  November 20, 2019 Researchers at Carnegie Mellon University have developed a system called Video Event Reconstruction and Analysis (VERA), that can accurately locate a shooter based on video recordings from as few as three smartphones. They released the code at a recent ACM International Conference on Multimedia in France. VERA uses machine learning techniques to synchronize the video feeds and calculate the position of each camera based on what that camera is seeing. The audio from the video feeds localizes the source of the gunshots. It also uses audio to identify the type of gun used, which determines bullet […]

Fingerprint test can distinguish between those who have taken or handled heroin

Science Daily  November 11, 2019An international team of researchers (UK, Ireland) has built a fingerprint drug testing technology which is now able to detect heroin, its metabolite, 6-monoacetylmorphine (6-AM) and other analytes associated with the class A drug. The technology was able to identify traces of heroin and 6-AM on drug non-users in every scenario the researchers devised – whether someone directly touched the drug, handled it and then thoroughly washed their hands, or had come into contact with heroin via shaking someone else’s hand…read more. TECHNICAL ARTICLE

Nuclear warheads? This robot can find them

EurekAlert  November 12, 2019 A team of researchers in the US (Princeton Plasma Physics Laboratory, Princeton University) is developing a prototype of autonomous, three-foot rolling robots armed with smart detectors to support nuclear safeguards and verify arms-control agreements. The demonstration confirmed that the robot could detect the source of neutrons and provided data. The “inspector bot” consists of a cylinder of polyethylene plastic containing three neutron counters set 120 degrees apart and mounted on a robot with specialized wheels that enable it to move in any direction. The detectors provide high sensitivity to the energy of detected neutrons and the […]

‘Treasure trove’ of earthquake clues could be unearthed by wavy new technique

Science Daily  September 24, 2019 Current rock mapping techniques use sound waves that help assess how rocks might behave when stress builds up, and how much shaking there would be in an earthquake. An international team of researchers (UK, New Zealand) have plugged current sound wave information into full waveform inversion which helps them paint a picture of the Hikurangi fault zone in unprecedented detail. They also captured the shallow faults which were responsible for the large Gisborne tsunami in 1947 — an example of a large tsunami caused by a relatively small slow slip earthquake. The researchers combined data […]