New Discoveries Archives

Physicists Discover a Remarkable New Type of Sound Wave

December 19, 2021

By City University of Hong Kong on Dec 10, 2021

Sound vortex generation enabled by the spin-orbit interaction in real space.

Can you imagine sound travels in the same way as light does? A research team at City University of Hong Kong (CityU) discovered a new type of sound wave: the airborne sound wave vibrates transversely and carries both spin and orbital angular momentum like light does. The findings shattered scientists’ previous beliefs about the sound wave, opening an avenue to the development of novel applications in acoustic communications, acoustic sensing, and imaging.

The research was initiated and co-led by Dr. Wang Shubo, Assistant Professor in the Department of Physics at CityU, and conducted in collaboration with scientists from Hong Kong Baptist University (HKBU) and the Hong Kong University of Science and Technology (HKUST). It was published in Nature Communications, titled “Spin-orbit interactions of transverse sound.”

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New Discoveries, Science & Technology News

‘Bogolons’ make graphene superconducting

August 14, 2021

Graphene can be made to superconduct by placing it next to a Bose-Einstein condensate – a form of matter in which all the atoms are in the same quantum state. According to the theorists who discovered it, this new type of superconductivity stems from interactions between the electrons in graphene and quasiparticles called “bogolons” in the condensate. If demonstrated experimentally, the work could make it possible to develop new types of hybrid superconducting devices for applications in quantum sensing and quantum computing.

Conventional superconductivity occurs when phonons – quasiparticles that arise from vibrations in a material’s crystal lattice – cause electrons in the material to pair up despite their mutual electromagnetic repulsion. If the material is cooled to sufficiently low temperatures, these paired electrons (known as Cooper pairs) can travel through it without any resistance.

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New Discoveries, Science & Technology News

Cities Have Unique Microbial ‘Fingerprints’, First Study of Its Kind Reveals

June 7, 2021

PETER DOCKRILL

Each city is populated by a unique host of microbial organisms, and this microbial ‘fingerprint’ is so distinctive, the DNA on your shoe is likely enough to identify where you live, scientists say.

In a new study, researchers took thousands of samples from mass transit systems in 60 cities across the world, swabbing common touch points like turnstiles and railings in bustling subways and bus stations across the world.

Subjecting over 4,700 of the collected samples to metagenomic sequencing (the study of genetic material collected from the environment), scientists created a global atlas of the urban microbial ecosystem, which they say is the first systematic catalog of its kind.

The results suggest that no two cities are alike, with each major metropolis studied so far revealing a unique ‘molecular echo’ of the microbial species that inhabit it, distinct from populations found in other urban environments.

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New Discoveries, Science & Technology News

Tiny graphene microchips could make your phones and laptops thousands of times faster, say scientists

February 19, 2021

Graphene, and its nano-scale dimensions, could be leveraged to design the smallest microchips yet

By Daphne Leprince-Ringuet

Researchers unlocked the electronic properties of graphene by folding the material like origami paper.

Graphene strips folded in similar fashion to origami paper could be used to build microchips that are up to 100 times smaller than conventional chips, found physicists – and packing phones and laptops with those tiny chips could significantly boost the performance of our devices.

New research from the University of Sussex in the UK shows that changing the structure of nanomaterials like graphene can unlock electronic properties and effectively enable the material to act like a transistor.

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New Discoveries, Science & Technology News

Physicists could do the ‘impossible’: Create and destroy magnetic fields from afar

December 11, 2020

By Stephanie Pappas

A new study circumvents a 178-year-old theory.

Scientists have figured out a way to create and cancel magnetic fields from afar.

The method involves running electric current through a special arrangement of wires to create a magnetic field that looks as if it came from another source. This illusion has real applications: Imagine a cancer drug that could be delivered directly to a tumor deep in the body by capsules made of magnetic nanoparticles. It’s not possible to stick a magnet in the tumor to guide the nanoparticles on their journey, but if you could create a magnetic field from outside the body that centered right on that tumor, you could deliver the drug without an invasive procedure. Advertisement

The strength of a magnetic field decreases with distance from the magnet, and a theorem proven in 1842, Earnshaw’s Theorem, says that it’s not possible to create a spot of maximum magnetic field strength in empty space.

“If you cannot have a magnetic field maxima in empty space, it means you cannot create the field of a magnetic source remotely, without placing an actual [magnetic] source at the target location,” said Rosa Mach-Batlle, a physicist at the Istituto Italiano Di Tecnologia Center for Biomolecular Nanotechnologies in Italy who led the new research.

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New Discoveries, Science & Technology News

Discovery of mechanism that switches off fat production after eating

December 10, 2020

By Rich Haridy

New research discovered lipogenesis, the process by which digested food is turned into fat by the liver, is switched off by a gut hormone released in the hours following a meal

A fascinating new study, published in the prestigious journal Nature Communications, is shedding light on a previously unknown mechanism by which a hormone released from the gut in the hours after eating effectively switches off the body’s fat production processes. The research also found this regulatory mechanism is defective in obese mice and human patients with non-alcoholic fatty liver disease.

After we eat a meal our body gets down to serious metabolic business. One key process triggered by eating is called lipogenesis, which is when our liver begins converting food into fats for storage across the body.

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DNA, Medical Breakthrough, Medicine, New Discoveries, Science & Technology News

Human aging process biologically reversed in world first

November 21, 2020

The ageing process has been biologically reversed for the first time by giving humans oxygen therapy in a pressurised chamber.

Scientists in Israel showed they could turn back the clock in two key areas of the body believed to be responsible for the frailty and ill-health that comes with growing older.

As people age, the protective caps at the ends of chromosomes – called telomeres – shorten, causing DNA to become damaged and cells to stop replicating. At the same time, “zombie” senescent cells build up in the body, preventing regeneration.

Increasing telemere length and getting rid of senescent cells is the focus of many anti-ageing studies, and drugs are being developed to target those areas.

Now scientists at Tel Aviv University have shown that giving pure oxygen to older people while in a hyperbaric chamber increased the length of their telomeres by 20 per cent, a feat that has never been achieved before.

Continue reading… “Human aging process biologically reversed in world first”

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Biotech, DNA, New Discoveries, new technology, Science & Technology News

Revolutionary synthetic DNA disk could hold key to future of storage

November 16, 2020

Synthetic DNA could solve the world’s storage problems

A new proof of concept that would see data stored on synthetic DNA could hold the key to the world’s storage problems. In theory, if the concept is successful, all the world’s accumulated data would fit inside a shoebox.

By 2025, it is estimated that 463 exabytes of data will be produced every day – equivalent to 212,765,957 DVDs – and data center providers are constantly expanding to provide storage for this deluge of information. A single gram of DNA, however, can hold 455 exabytes of information – a fact that has drawn the attention of computer scientists.

Continue reading… “Revolutionary synthetic DNA disk could hold key to future of storage”

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cutting edge, New Discoveries, Record Breaker, Science & Technology News

Meet the zeptosecond, the shortest unit of time ever measured

October 27, 2020

ABOVE – A particle of light, called a photon (yellow arrow), produces electron waves out of an electron cloud (grey) of a hydrogen molecule (red: nucleus). The result of those interactions is what’s called an interference pattern (violet-white). The interference pattern is slightly skewed to the right, allowing researchers to calculate the time for the photon to get from one atom to the next.

Scientists have measured the shortest unit of time ever: the time it takes a light particle to cross a hydrogen molecule.

That time, for the record, is 247 zeptoseconds. A zeptosecond is a trillionth of a billionth of a second, or a decimal point followed by 20 zeroes and a 1. Previously, researchers had dipped into the realm of zeptoseconds; in 2016, researchers reporting in the journal Nature Physics used lasers to measure time in increments down to 850 zeptoseconds. This accuracy is a huge leap from the 1999 Nobel Prize-winning work that first measured time in femtoseconds, which are millionths of a billionths of seconds.

Continue reading… “Meet the zeptosecond, the shortest unit of time ever measured”

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Energy, Engineering, New Discoveries, new technology, Record Breaker, Science & Technology News

Scientists create the world’s first room temperature superconductor

October 24, 2020

Superconducting materials typically require extremely cool temperatures to operate, which is demonstrated in this photo. But a new discovery could change that

Since its discovery more than a century ago, superconductivity has come to play a powerful role in many modern day technologies, such as maglev trains and MRI scans, but its utility has been limited by the need for extremely cool operating temperatures. Scientists are now claiming a big breakthrough in this area, creating what they say is the first material capable of superconductivity at room temperature.

The work was led by Ranga Dias at the University of Rochester, and aims to overcome one of the major roadblocks in expanding the uses of superconductive materials. These materials exhibit no electrical resistance and expel a magnetic field, but because they typically only function at temperatures below -140 °C (-220 °F), they require expensive equipment to maintain.

“Because of the limits of low temperature, materials with such extraordinary properties have not quite transformed the world in the way that many might have imagined,” says Dias. “However, our discovery will break down these barriers and open the door to many potential applications.”

Continue reading… “Scientists create the world’s first room temperature superconductor”

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NASA, New Discoveries, Record Breaker, Science & Technology News, Space, Space Flight

For the first time in its history, NASA successfully collects sample from asteroid

October 22, 2020

Touchdown!

For the first time in its history, NASA has successfully collected samples from the surface of an asteroid, using the OSIRIS-REx spacecraft on Tuesday.

The small spacecraft has been orbiting Bennu, an asteroid 500 meters across, for almost two years. Around 6 p.m. Eastern time on Tuesday, the spacecraft completed a “Touch-And-Go” maneuver before firing its thrusters to get back to a safe distance from the asteroid. The lonely space rock was more than 200 million miles away at the time.

“We did it,” principal investigator Dante Lauretta said during the agency’s live broadcast. “We’ve tagged the surface of the asteroid.”

Continue reading… “For the first time in its history, NASA successfully collects sample from asteroid”

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NASA, New Discoveries, Science & Technology News, Space

Water on Mars: discovery of three buried lakes intrigues scientists

October 4, 2020

Researchers have detected a group of lakes hidden under the red planet’s icy surface.

Scientists have long thought that there could be water trapped beneath the surface of Mars.

Two years ago, planetary scientists reported the discovery of a large saltwater lake under the ice at Mars’s south pole, a finding that was met with excitement and some scepticism. Now, researchers have confirmed the presence of that lake — and found three more.

The discovery, reported on 28 September in Nature Astronomy1, was made using radar data from the European Space Agency’s Mars-orbiting spacecraft, called Mars Express. It follows the detection of a single subsurface lake in the same region in 2018 — which, if confirmed, would be the first body of liquid water ever detected on the red planet and a possible habitat for life. But that finding was based on just 29 observations made from 2012 to 2015, and many researchers said they needed more evidence to support the claim. The latest study used a broader data set comprising 134 observations from 2012 to 2019.

Continue reading… “Water on Mars: discovery of three buried lakes intrigues scientists”

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