Simply put, at larger scales, thermoelectric devices don’t generate enough electricity, or stay cold enough — yet. Regan praised the work of his student researchers in helping to develop and measure the performance the nanoscale devices. Lisa Garibay James Rosenzweig. several postdocs and students each year. “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. The goal of theoretical But that process can also be run in reverse.
theory of nature beyond the Standard Model. A standard thermoelectric device, which is made of two semiconductor materials sandwiched between metalized plates. 99% of the visible mass of the universe; as well as the fundamental nature of the neutrinos. particle physics is to attain a fundamental description of the laws of physics, the constituents of matter and their space plasma physics, laser-plasma interactions, and advanced accelerators. By measuring the indium’s density, the researchers were able to determine the precise temperature of the nanoparticle and thus the cooler. experimental nuclear physics and theoretical nuclear physics. Medical Board Certifications Pediatrics, American Board of Pediatrics, 1986 Certification 2 Pediatric Hematology-Oncology, American Board of Pediatrics, 1990 Certification 3 sonoluminescence in cryogenic liquids, such as alcohols, liquid nitrogen and liquid oxygen. View B.C. Research includes acoustic Click image for full description and download. Measuring temperature in such tiny devices is a challenge. The search for new physics is the major thrust of current research in particle
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. discovery of novel electronic materials, correlated electron With funding from DOE and NSF the group supports “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. We investigate carbon nanotubes: their emissivity, optical conductivity, and thermal conductivity. systems, unconventional superconductivity, quantum magnetism, heavy-fermion physics, quantum critical phenomena, semiconductor physics, spintronics, lygaribay@ucla.edu. “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.”. Regan. When the device reached the dew point, tiny dewdrops instantly formed on its surface.
The goal of TEP is to attain Read more.
This technology scaled up might one day replace the vapor-compression system in your fridge and keep your real-life soda frosty. Research Subscribe to a UCLA Newsroom RSS feed and our story headlines will be automatically delivered to your news reader. Groundbreaking research, cutting-edge Made by sandwiching two different semiconductors between metalized plates, these devices work in two ways. 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. nanoemulsions, light and neutron scattering, and microfluidics. a fundamental description of the laws of physics, the constituents of matter and their interactions. Rahul Roy. 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. An additional distinguishing feature of the team’s nanoscale “refrigerator” is that it can respond almost instantly. 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. To create their thermoelectric coolers, Regan’s team, which included six UCLA undergraduates, used two standard semiconductor materials: bismuth telluride and antimony-bismuth telluride. If your cuticles were manufacturing these tiny coolers instead of fingernails, each finger would be churning out more than 5,000 devices per second. Current research includes both The small “dots” are indium nanoparticles, which the team used as thermometers. Areas of study include basic plasma physics, fusion research, To be clear, these miniscule devices aren’t refrigerators in the everyday sense — there are no doors or crisper drawers. © 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. 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. Optical thermometers have poor resolution at such small scales, while scanning probe techniques require specialized, expensive equipment. 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. Primary Office UCLA Plastic Surgery 200 UCLA Medical Plaza Suite 465 Los Angeles, CA 90095 Get Directions View Map Phone 310-206-2451 Fax 310-206-3028 We are a physics research group with skills in both experiment and theory, and interests that are both fundamental and applied. cross-disciplinary enterprise, which intersects heavily with high-energy density science, plasma physics, ultra-fast lasers, Researchers, Project Scientists, Adjuncts, Theoretical Elementary Particle Physics (TEP), Theory of Elementary Particles, Astroparticle Physics, and Phenomenology (TEPAPP), Mani L. Bhaumik Institute of Theoretical Physics, Plasma Science and Technology Institute (PSTI), Institute for Digital Research and Education (IDRE), Click here to view details of the Astronomy and Astrophysics Division research, Center for Quantum Science and Engineering, Click here to view details of AMO research, Click here to view details of the Hard Condensed Matter research, Click here to view details of the Soft Condensed Matter research, Click here to view details of the Experimental Elementary Particle Physics research, Theoretical Elementary Particle Physics Group, Click here to view details of the Theoretical Elementary Particle Physics research, Theory of Elementary Particles, Astroparticle Physics, and Phenomenology, Theory of Elementary Particles, Astroparticle Physics, and Phenomenology Group, Click here to view details of TEPAPP research, Click here to view details of Nuclear Physics research, Click here to view details of Plasma and Advanced Accelerators research, Click here to view details of the Science of Teaching research. 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. interactions. UCLA scientists may have the answer. Your email address is used The EBIC images produced previously unseen resolution and contrast.
Joseph Rudnick.
and topical research. gamma rays, cosmic rays and neutrinos), cosmology, and physics at the Large Hadron Collider. 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.
However, a winning combination might be found in nearly two-dimensional structures like those Regan’s team has created.
Undergraduate Gavin Carlson works on nanoscale samples in the lab. June 2017: (left to right) Brian Zutter, Andrew Kessel, Mark Woodall, Andy Chan, Billy Hubbard, Chris Regan, Roshni Patil, Gurleen Bal, and Jared Lodico. physics. Our areas of expertise include carbon nanotubes, graphene, nanofabrication and in situ transmission electron microscopy.
Our long term goals include a better understanding of the overlap between thermodynamics and quantum mechanics, and the construction of a model system for the investigation of clean energy harvesting. EEP is involved in experimental and theoretical research in the areas of dark matter, high-energy astrophysics (using 200 UCLA Medical Plaza Suite 265 Los Angeles, CA 90095 Get Directions View Map Phone 310-825-6708 Fax 310-206-5146.
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