Researchers working at the National Institute of Standards and Technology (NIST) have developed a new microscopy technique that uses a process similar to how an old tube television produces a picture—cathodoluminescence—to image nanoscale features. Combining the best features of optical and scanning electron microscopy, the fast, versatile, and high-resolution technique allows scientists to view surface and subsurface features potentially as small as 10 nanometers in size.... Read more »
Yoon, H., Lee, Y., Bohn, C., Ko, S., Gianfrancesco, A., Steckel, J., Coe-Sullivan, S., Talin, A., & Zhitenev, N. (2013) High-resolution photocurrent microscopy using near-field cathodoluminescence of quantum dots. AIP Advances, 3(6), 62112. DOI: 10.1063/1.4811275
A team of researchers from the Nanoengineering Research Centre (CRNE) and the Department of Electronic Engineering at the Universitat Politècnica de Catalunya—BarcelonaTech (UPC) has found a way to manufacture crystalline silicon materials cheaper and faster.... Read more »
Hernández, D., Trifonov, T., Garín, M., & Alcubilla, R. (2013) “Silicon millefeuille”: From a silicon wafer to multiple thin crystalline films in a single step. Applied Physics Letters, 102(17), 172102. DOI: 10.1063/1.4803009
A new study by astronomers at NASA, Johns Hopkins University and the Rochester Institute of Technology confirms long-held suspicions about how stellar-mass black holes produce their highest-energy light.... Read more »
NASA's Goddard Space Flight Center. (2013) NASA-Led Study Explains Decades of Black Hole Observations. NASA's Goddard Space Flight Center. info:/
Scientists at Brookhaven National Laboratory have developed a relatively simple synthesis process for making core-shell gold-indium oxide nanoparticles.... Read more »
Sutter, E., Tong, X., Jungjohann, K., & Sutter, P. (2013) Oxidation of nanoscale Au-In alloy particles as a possible route toward stable Au-based catalysts. Proceedings of the National Academy of Sciences. DOI: 10.1073/pnas.1305388110
After two years since the last edition, I was back in Paris to participate to the Twelfth Workshop on Non-perturbative Quantum Chromodynamics. The conference is organized by high-energy group at Brown University and held at Institut d’Astrophysique de Paris. Professor Chung-I Tan and Professor Berndt Mueller from Duke University are the organizers. As it also happened in the precedent edition, […]... Read more »
Marco Frasca. (2011) Chiral symmetry in the low-energy limit of QCD at finite temperature. Phys. Rev. C 84, 055208 (2011). arXiv: 1105.5274v4
D. Gomez Dumm, & N. N. Scoccola. (2004) Characteristics of the chiral phase transition in nonlocal quark models. Phys.Rev. C72 (2005) 014909. arXiv: hep-ph/0410262v2
Ollitrault, J. (1992) Anisotropy as a signature of transverse collective flow. Physical Review D, 46(1), 229-245. DOI: 10.1103/PhysRevD.46.229
M. Ruggieri, F. Scardina, S. Plumari, & V. Greco. (2013) Elliptic Flow from Nonequilibrium Color Glass Condensate Initial Conditions. arXiv. arXiv: 1303.3178v1
David Dudal, John Gracey, Silvio Paolo Sorella, Nele Vandersickel, & Henri Verschelde. (2008) A refinement of the Gribov-Zwanziger approach in the Landau gauge: infrared propagators in harmony with the lattice results. Phys.Rev.D78:065047,2008. arXiv: 0806.4348v2
Lieb, E., & Simon, B. (1977) The Thomas-Fermi theory of atoms, molecules and solids. Advances in Mathematics, 23(1), 22-116. DOI: 10.1016/0001-8708(77)90108-6
Marco Frasca. (2006) Thermodynamic Limit and Decoherence: Rigorous Results. Journal of Physics: Conference Series 67 (2007) 012026. arXiv: quant-ph/0611024v1
The electrode material has a decisive influence on a battery’s capacity. So far, the negative electrode typically consists of graphite, whose layers can store lithium atoms. While silicone could be much more efficient choice, most silicon-based designs have a major flaw—structures tend to crack or break easily when they are used repeatedly. Scientists at the Technical University Munich have now developed a material made of boron and silicon that could smooth the way to systems with h........ Read more »
Zeilinger, M., van Wüllen, L., Benson, D., Kranak, V., Konar, S., Fässler, T., & Häussermann, U. (2013) LiBSi : A Tetrahedral Semiconductor Framework from Boron and Silicon Atoms Bearing Lithium Atoms in the Channels . Angewandte Chemie International Edition, 52(23), 5978-5982. DOI: 10.1002/anie.201301540
Thanks to scientists at the SLAC National Accelerator Laboratory, audiences can hear a 200-year-old opera by composer Luigi Cherubini in full for the first time in centuries. The scientists blasted X-rays at the damaged musical score to peek at the musical notes hidden beneath a layer of smudgy black.... Read more »
THOMAS SUMNER. (2013) SLAC X-rays resurrect 200-year-old lost aria. Stanford University News. info:/
Researchers at Sandia National Laboratories have confirmed the particle-by-particle mechanism by which lithium ions move in and out of electrodes made of lithium iron phosphate (LiFePO4, or LFP), findings that could lead to better performance in lithium-ion batteries in electric vehicles, medical equipment and aircraft.... Read more »
Chueh, W., El Gabaly, F., Sugar, J., Bartelt, N., McDaniel, A., Fenton, K., Zavadil, K., Tyliszczak, T., Lai, W., & McCarty, K. (2013) Intercalation Pathway in Many-Particle LiFePO Electrode Revealed by Nanoscale State-of-Charge Mapping . Nano Letters, 13(3), 866-872. DOI: 10.1021/nl3031899
A group of scientists from the Ulsan National Institute of Science and Technology (UNIST), Korea, has developed a new metal-free fuel cell catalyst using edge-halogenated graphene nanoscale platelets. As a replacement for the expensive platinum-based catalysts this graphene application opens a way to affordable fuel cells.... Read more »
Jeon, I., Choi, H., Choi, M., Seo, J., Jung, S., Kim, M., Zhang, S., Zhang, L., Xia, Z., Dai, L.... (2013) Facile, scalable synthesis of edge-halogenated graphene nanoplatelets as efficient metal-free eletrocatalysts for oxygen reduction reaction. Scientific Reports. DOI: 10.1038/srep01810
A collaboration between Oak Ridge National Laboratory researchers and a team led by the Carnegie Institution for Science’s Malcolm Guthrie has led to discoveries about how ice behaves under pressure, changing ideas that date back almost 50 years. The findings could alter scientists’ understanding of how the water molecule responds to conditions found deep within planets and could have implications for energy science.... Read more »
Guthrie, M., Boehler, R., Tulk, C., Molaison, J., dos Santos, A., Li, K., & Hemley, R. (2013) Neutron diffraction observations of interstitial protons in dense ice. Proceedings of the National Academy of Sciences. DOI: 10.1073/pnas.1309277110
Fifty years ago this week, the journal Physical Review Letters published an article by Nicola Cabibbo entitled "Unitary Symmetry and Leptonic Decays". It gave a working and quantitative theoretical description of how particles which interact by the strong interaction (one of the fundamental forces of nature) can decay according to the weak interaction (another of them). It was already known that there were some patterns and rules that seemed to be obeyed, but Cabibbo gave a beautiful........ Read more »
The ultimate dream of nanotechnology is to be able to manipulate matter atom by atom. To do that, we first need to know what they look like. In what could be a major step in that direction, researchers have developed a method that can determine the shape of a single molecule and identify its constituent atoms.
The laws of nature limit what can be seen with the help of light alone. Only objects separated by more than half the wavelength of the light that illuminates it can be observed as separ........ Read more »
Zhang, R., Zhang, Y., Dong, Z., Jiang, S., Zhang, C., Chen, L., Zhang, L., Liao, Y., Aizpurua, J., Luo, Y.... (2013) Chemical mapping of a single molecule by plasmon-enhanced Raman scattering. Nature, 498(7452), 82-86. DOI: 10.1038/nature12151
During the last several months a number of new battery technologies has been proposed by different research institutions. Scientists are focusing their attention on finding ways to make batteries store more energy and recharge faster, while at the same time reducing environmental risks posed by the chemicals that are used in batteries.... Read more »
MOON, J., MUNAKATA, H., KAJIHARA, K., & KANAMURA, K. (2013) Hydrothermal Synthesis of Manganese Dioxide Nanoparticles as Cathode Material for Rechargeable Batteries. Electrochemistry, 81(1), 2-6. DOI: 10.5796/electrochemistry.81.2
Zhou, G., Wang, D., Li, F., Hou, P., Yin, L., Liu, C., Lu, G., Gentle, I., & Cheng, H. (2012) A flexible nanostructured sulphur–carbon nanotube cathode with high rate performance for Li-S batteries. Energy , 5(10), 8901. DOI: 10.1039/c2ee22294a
Kravchyk, K., Protesescu, L., Bodnarchuk, M., Krumeich, F., Yarema, M., Walter, M., Guntlin, C., & Kovalenko, M. (2013) Monodisperse and Inorganically Capped Sn and Sn/SnO2 Nanocrystals for High-Performance Li-Ion Battery Anodes Nanocrystals for High-Performance Li-Ion Battery Anodes . Journal of the American Chemical Society, 135(11), 4199-4202. DOI: 10.1021/ja312604r
Augustyn, V., Come, J., Lowe, M., Kim, J., Taberna, P., Tolbert, S., Abruña, H., Simon, P., & Dunn, B. (2013) High-rate electrochemical energy storage through Li intercalation pseudocapacitance. Nature Materials. DOI: 10.1038/nmat3601
Most of the matter in the universe may be made out of particles that possess an unusual, donut-shaped electromagnetic field called an anapole.... Read more »
David Salisbury. (2013) New, simple theory may explain mysterious dark matter. Vanderbilt University. info:/
If you are a human reader, you've probably never seen your lunch put up an invisibility shield and perform an evasive maneuver just as you reached for it. But spare a thought for the bats. If your peanut-butter sandwich were anything like a tiger moth, you'd have a hard time finding a meal.
Several kinds of insects are able to detect the echolocation calls of a bat that's approaching like an enemy submarine. Moths may fly in another direction if they hear a bat nearby, or even drop into an e........ Read more »
Corcoran, A., Wagner, R., & Conner, W. (2013) Optimal Predator Risk Assessment by the Sonar-Jamming Arctiine Moth Bertholdia trigona. PLoS ONE, 8(5). DOI: 10.1371/journal.pone.0063609
A UW-Madison electrical engineer has proposed a design for dye-sensitized solar cells that can at the same time generate power and work as a solar energy storage system.... Read more »
Zhang, X., Huang, X., Li, C., & Jiang, H. (2013) Dye-Sensitized Solar Cell with Energy Storage Function through PVDF/ZnO Nanocomposite Counter Electrode. Advanced Materials. DOI: 10.1002/adma.201301088
Engineers from the Smart Lighting Engineering Research Center at Rensselaer Polytechnic Institute have successfully integrated a light-emitting diode (LED) and a power transistor on the same gallium nitride (GaN) chip. The ability to integrate LED and a power transistor on one chip opens the way to a new generation of LED technology that would be easier to manufacture, cheaper and significantly more energy efficient.... Read more »
Li, Z., Waldron, J., Detchprohm, T., Wetzel, C., Karlicek, R., & Chow, T. (2013) Monolithic integration of light-emitting diodes and power metal-oxide-semiconductor channel high-electron-mobility transistors for light-emitting power integrated circuits in GaN on sapphire substrate. Applied Physics Letters, 102(19), 192107. DOI: 10.1063/1.4807125
It become pretty much a routine, albeit an expensive one, to use transmission electron microscopes for imaging atoms in a crystal. But what has often been missing from those images is a crucial bit of information, the identity of the chemical element that has been looked at. Of course, the grey scales in the contrast […]... Read more »
Urban, K., Mayer, J., Jinschek, J., Neish, M., Lugg, N., & Allen, L. (2013) Achromatic Elemental Mapping Beyond the Nanoscale in the Transmission Electron Microscope. Physical Review Letters, 110(18). DOI: 10.1103/PhysRevLett.110.185507
An international team of scientists using the most powerful telescope on Earth has discovered the moments just after the Big Bang happened more like the theory predicts, eliminating a significant discrepancy that troubled physicists for two decades.
... Read more »
Steve Jefferson. (2013) International Team on Keck Observatory Strengthens Big Bang Theory. W.M. Keck Observatory. info:/
Cold Fusion was first reported in 1989. The original experiment was supposed to have produced extra heat that could not be explained wiht chemistry or electronics, so naturally, fusion was considered. Contrary to popular belief, that original experiment has been replicated successfully. The problem isn’t that the first experiment produced actual extra heat and no…... Read more »
Østgaard, N., Gjesteland, T., Carlson, B., Collier, A., Cummer, S., Lu, G., & Christian, H. (2013) Simultaneous observations of optical lightning and terrestrial gamma ray flash from space. Geophysical Research Letters. DOI: 10.1002/grl.50466
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