For the present demonstration, the researchers had to use a laser light to pump electrons to emit light.
probably because ammonia donates electrons that neutralize holes in the black phosphorus sheets. That immediately makes black phosphorous a decent ammonia detector.
#Meet the particle that could be crucial to future technology Physicists from around the world are celebrating the discovery of a particle with no mass that could allow us to create faster, more efficient electronics.
It's called the Weyl fermion. Originally proposed by mathematician Hermann Weyl in 1929, these fermions are thought to be the building blocks of other subatomic particles.
Right now, electricity is carried by streams of electrons -but Weyl fermions could provide a much more stable and efficient way of doing the same thing.
One interesting quirk of their physics is that they can behave as a composite of matter and antimatter inside a crystal
-which is how they were found, and the only place they can exist. But another is that they can be used to create massless electrons that move very quickly
and aren't lost as heat energy when they collide with something like regular electrons do.""It's like they have their own GPS
and steer themselves without scattering,"said M. Zahid Hasan, who led the research team.""These are very fast electrons that behave like unidirectional light beams
and can be used for new types of quantum computing.""He added:""The physics of the Weyl fermion are so strange,
there could be many things that arise from this particle that we're just not capable of imagining now."
"The full details of the discovery were published in the journal Science e
#Synthetic coral could suck pollution out of the sea A team of Chinese researchers has developed a material that mimics the way corals suck industrial pollutants out of the water.
It's hoped the discovery could help combat health issues in fishing communities around the world.
However, so far only electron holography could be considered for mapping magnetic domains of three-dimensional objects at the nanometre scale
and block X-rays, gamma rays and neutron radiation, according to a study from North carolina State university. The discovery means the materials could be useful in spacecraft, the nuclear industry and in medicine.
The term High-Z refers to all the metals in the alloy having a large number of protons in their atomic nuclei;
It outperformed bulk materials at blocking neutron radiation, and was bettered only by lead at blocking X-rays. owever,
and control the electron flow through the gate. Typically scientists working to this atomic scale have struggled to reliably control the flow of electrons
which are difficult to contain and can jump outside of the transistor, rendering it useless.
said that researchers had created the smallest laser possible powered by single electrons that burrow through quantum dots.
"is a minuscule microwave laser that demonstrates how light and moving electrons interact with each other, said Princeton university.
who worked with Petta in his lab. Prof Petta added that a double quantum dot was capable of only transferring one electron at a time.
These double quantum dots are zero-dimensional as far as the electrons are concerned they are trapped in all three spatial dimensions.
The team found that electrons would travel through the graphene as well as through the copper wire,
For this study, the researchers had to pump electrons into the semiconductors with an additional laser light.
the electrodes are suspensions of small particles carried by a liquid and pumped through different compartments of the battery.
Having the electrode in the form of tiny suspended particles reduces the path length for charged particles as they move through the material, a property known as tortuosity.
#Princeton Researchers Develop Rice Sized Laser Princeton university researchers have built a rice sized laser powered by single electrons tunneling through artificial atoms known as quantum dots.
They found that the electrons flowed in a single-file through each dot, which emitted photons in the microwave region of the light spectrum.
The photons bounced off mirrors on either side of the cavity, creating a beam of microwave light. e designed dots to emit photons
when single electrons jump from a higher to a lower energy level across the double dot.
It is like a line of people crossing a wide stream by leaping onto a rock so small that it can only hold one person.
They are forced to cross the stream one at a time. These double quantum dots are zero-dimensional as far as the electrons are concerned they are trapped in all three spatial dimensions
explained Jason Petta, an associate professor of physics at Princeton university and leader of the study. The findings were published in the Science journal e
rice grain sized laser that is powered by a single electron from the artificial atoms called quantum dots.
said, t is basically as small as you can go with these single-electron devices. The discovery will boost the ongoing efforts of scientists across the world to use semiconductor materials to build quantum computing systems. consider this to be a really important result for our long-term goal,
Qubits are the basic unit of information in quantum computing. e designed dots to emit photons
when single electrons jump from a higher to a lower energy level across the double dot.
These double quantum dots are zero-dimensional as far as the electrons are concerned they are trapped in all three spatial dimensions,
A single electron trapped in a semiconductor nanostructure can form the most basic of building blocks for a quantum computer.
scientists need to develop a scalable architecture that allows full control over individual electrons in computational arrays.
#CERN Scientists Welcome Two New Particles To The Atomic Family CERN Large hadron collider in Europe, the giant atom-smashing machine, has discovered two new subatomic particles.
This will help physicists in their understanding of the behavior between elementary particles. The existence of these particles was known theoretically,
but now the scientists have existential data. The two new members of the subatomic family, known as Xi b and Xi b*-,are baryons.
Baryons are a group that includes protons and neutrons. They are made up of three even tinier building blocks, called quarks.
Together in different combinations, quarks construct a different baryon each time. The two new particles that were discovered recently
have the same quarks but with different configurations. The new particles are also positively charged (similar to protons) and six times larger than a proton.
Patrick Koppenburg from Netherlandsnikhef Institute and who is working with the CERN said, ow we know exactly what the mass is
and that is good news. There are maybe three to five such particles discovered each year. Here we have two in one go,
which is quite extraordinary. The measurements that pinpointed the baryons were collected based on data at the Large hadron collider during 2011 and 2012.
The machine (LHC) is currently shut down but will start next spring, at higher energy and with intense beams than before.
The giant LHC smashes proton beams together and the scientists are left with the job of trying to find the presence of the data of the particles,
But with the case of these two particles it was slightly easier. According to the study co-author Matthew Charles, a particle physicist at The french National Center for Scientific research LPNHE laboratory at the University of Paris VI
the data of the new particles was found surprisingly quickly. t reassuring, adds Dr Charles,
These microbots are tiny oblong particles having slight attraction towards each other. The journal Nature Materials published this research.
the microbots get joined together, resulting in an indefinitely long chain with constant addition of new particles.
The previous phone was the Motorola Photon Q, an Android phone that sold for $269.
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