“We have made the world’s smallest refrigerator,” said Regan, the lead author of a paper on the research published recently in the journal ACS Nano.
A team led by UCLA physics professor Chris Regan has succeeded in creating thermoelectric coolers that are only 100 nanometers thick — roughly one ten-millionth of a meter — and have developed an innovative new technique for measuring their cooling performance. 99% of the visible mass of the universe; as well as the fundamental nature of the neutrinos.
“Connecting advanced materials science and electron microscopy to physics in everyday areas, like refrigeration and dew formation, helps students get traction on the problems very quickly,” Regan said. Regan’s professional profile on LinkedIn. To put this tiny volume in perspective: Your fingernails grow by thousands of cubic micrometers every second.
Optical thermometers have poor resolution at such small scales, while scanning probe techniques require specialized, expensive equipment. Read more. theories, non-perturbative gauge theories, quantum gravity and string theory. View B.C.
theory of nature beyond the Standard Model. discovery of novel electronic materials, correlated electron “We beat the record for the world’s smallest thermoelectric cooler by a factor of more than ten thousand,” said Xin Yi Ling, one of the paper’s authors and a former undergraduate student in Regan’s research group. The team exploited this effect by powering their device while watching it with an optical microscope.
Research activities include the following areas. B. Chris Regan's long term goals include a better understanding of the overlap between thermodynamics and quantum mechanics, ... Our research at UCLA focuses on how course design decisions impact student application and retention of physics and mathematics skills.
quantum information protocols in trapped ions, and developing new methods for producing ultracold molecules and molecular ions.
An additional distinguishing feature of the team’s nanoscale “refrigerator” is that it can respond almost instantly. and low temperature physics studies such as theoretical investigations into the superfluid phase transition of liquid helium and search for the phenomenon of
A team led by UCLA physics professor Chris Regan has succeeded in creating thermoelectric coolers that are only 100 nanometers thick — roughly one ten-millionth of a meter — and have developed an innovative new technique for measuring their cooling performance. particle physics is to attain a fundamental description of the laws of physics, the constituents of matter and their The nuclear physics research is
This technology scaled up might one day replace the vapor-compression system in your fridge and keep your real-life soda frosty.
physics. Read more.
Our areas of expertise include carbon nanotubes, graphene, nanofabrication and in situ transmission electron microscopy. firstname.lastname@example.org.
All members of the Division carry out active research programs that garner widespread international recognition. This Physics & Astronomy faculty group is active in the Subscribe to a UCLA Newsroom RSS feed and our story headlines will be automatically delivered to your news reader.
When heat is applied, one side becomes hot and the other remains cool; that temperature difference can be used to generate electricity.
The goal of theoretical James Rosenzweig.
To supplement the PEET measurements, the researchers invented a technique called condensation thermometry. Research nanoemulsions, light and neutron scattering, and microfluidics.
The science of teaching and learning
A standard thermoelectric device, which is made of two semiconductor materials sandwiched between metalized plates. As the team varied the amount of power applied to the coolers, the devices heated and cooled, and the indium correspondingly expanded and contracted. The research was supported by STROBE, a Science and Technology Center funded by the National Science Foundation’s Division of Materials Research, and by the UCLA Division of Physical Sciences Entrepreneurship and Innovation Fund. demonstrate new technologies and measurements. Groundbreaking research, cutting-edge
Beam physics is a vibrant,
The basic idea is simple: When normal air cools to a certain temperature — the dew point — water vapor in the air condenses into liquid droplets, either dew or rain. This electron microscope image shows the cooler’s two semiconductors — one flake of bismuth telluride and one of antimony-bismuth telluride — overlapping at the dark area in the middle, which is where most of the cooling occurs. “PEET has the spatial resolution to map thermal gradients at the few-nanometer scale — an almost unexplored regime for nanostructured thermoelectric materials,” said Regan, who is a member of the California NanoSystems Institute at UCLA. a fundamental description of the laws of physics, the constituents of matter and their interactions. To create their thermoelectric coolers, Regan’s team, which included six UCLA undergraduates, used two standard semiconductor materials: bismuth telluride and antimony-bismuth telluride. LinkedIn is the world's largest business network, helping professionals like B.C.
experimental nuclear physics and theoretical nuclear physics. To be clear, these miniscule devices aren’t refrigerators in the everyday sense — there are no doors or crisper drawers. Welcome to the UCLA Regan Research Group We are a physics research group with skills in both experiment and theory, and interests that are both fundamental and applied. How do you keep the world’s tiniest soda cold? The small “dots” are indium nanoparticles, which the team used as thermometers. When the device reached the dew point, tiny dewdrops instantly formed on its surface. With funding from DOE and NSF the group supports
When an electrical current is applied to the device, one side becomes hot and the other cold, enabling it to serve as a cooler or refrigerator.
But by focusing on nanostructures — devices with at least one dimension in the range of 1 to 100 nanometers — Regan and his team hope to discover new ways of synthesizing better-performing bulk materials. cross-disciplinary enterprise, which intersects heavily with high-energy density science, plasma physics, ultra-fast lasers,
However, a winning combination might be found in nearly two-dimensional structures like those Regan’s team has created. Professor Condensed Matter Office: PAB 4-425 Phone: 310-206-3684 Email: Website. The study, which was published online in Physical Review Applied, was led by Chris Regan, UCLA professor of physics and astronomy and a member of the California NanoSystems Institute.
The sought-after properties for materials in high-performance thermoelectric coolers are good electrical conductivity and poor thermal conductivity, but these properties are almost always mutually exclusive. © 2020 Regents of University of California, “We have made the world’s smallest refrigerator,” said Regan, the lead author of a, In 2015, Regan’s research group developed a, Novel coronavirus (COVID-19) information for the UCLA campus community, Interactive map will crowdsource hate crime reports, Whether Californians vote may hinge on race, ethnicity, UCLA health survey finds. “Watching them learn and innovate gives me a lot of hope for the future of thermoelectrics.”. “Its small size makes it millions of times faster than a fridge that has a volume of a millimeter cubed, and that would be already be millions of times faster than the fridge you have in your kitchen,” Regan said. The scientific instruments on NASA’s Voyager spacecraft, for instance, have been powered for 40 years by electricity from thermoelectric devices wrapped around heat-producing plutonium. The UCLA AMO group “Once we understand how thermoelectric coolers work at the atomic and near-atomic level,” he said, “we can scale up to the macroscale, where the big payoff is.”. They attached regular Scotch tape to hunks of the conventional bulk materials, peeled it off and then harvested thin, single-cystal flakes from the material still stuck to the tape. We are a physics research group with skills in both experiment and theory, and interests that are both fundamental and applied.
We investigate carbon nanotubes: their emissivity, optical conductivity, and thermal conductivity. What are thermoelectric devices and how do they work? 310-825-1040
To measure the temperature of their thermoelectric coolers, the researchers deposited nanoparticles made of the element indium on each one and selected one specific particle to be their thermometer. nonlinear dynamics and various high-field/high-power technologies. EEP is involved in experimental and theoretical research in the areas of dark matter, high-energy astrophysics (using From a recent talk: "Visualizing the invisible: microscopy of nanolamps and nanobubbles."
(Check your inbox or spam filter for confirmation.). From these flakes, they made functional devices that are only 100 nanometers thick and have a total active volume of about 1 cubic micrometer, invisible to the naked eye. Goals include understanding quantum magnetism using The goal of TEP is to attain sonoluminescence in cryogenic liquids, such as alcohols, liquid nitrogen and liquid oxygen. spans the areas of perturbative gauge theories, lattice gauge quantum statistical mechanics and field theory, topological states of matter, and Majorana fermions. B.C. In 2015, Regan’s research group developed a thermometry technique called PEET, or plasmon energy expansion thermometry, which uses a transmission electron microscope to determine temperatures at the nanoscale by measuring changes in density. Click image for full description and download. The search for new physics is the major thrust of current research in particle August, 2017: Billy Hubbard and Jared Lodico at the Microscopy & Microanalysis (M&M) conference in St. Louis, MO. Read more.
Physicists believe that the Standard Model (SM) of elementary particles must be part of a more fundamental Associate Professor Condensed Matter Office: Knudsen 6-130M Phone: 310-825-4444 Email: Website. Simply put, at larger scales, thermoelectric devices don’t generate enough electricity, or stay cold enough — yet.
Professor Chris Regan is principal investigator of the Regan Research Group.
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