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News
Reducing the effects of oxygen and hydrogen on graphite SIMS measurements
1+ hour, 33+ min ago (124+ words) lead image Wilhelm et al. studied how the surface chemistry of industrial graphite affects sputtering and SIMS measurement intensity to help improve graphite data interpretation. “During the analysis of aged cells, [the] graphite substrate serves as a stable reference while…...
Computational chemistry’s rocky revolution
4+ day, 1+ hour ago (151+ words) Density functional theory (DFT), which provides a simplified quantum mechanical approach to studying electronic structure for atoms, molecules and materials, is the cornerstone of modern computational chemistry. Yet despite its ubiquity in chemistry today, DFT faced a rocky road to…...
Why NO is much more efficient than O2 in para-ortho H2 conversion
5+ day, 42+ min ago (214+ words) lead image Molecular hydrogen (H2) exists in two states: para-H2 and ortho-H2, determined by the spin of the nuclei. Para-H2 is widely used as rocket fuel and to increase the sensitivity of nuclear magnetic resonance, so it is important to understand…...
Pinning down the thermal properties of carbon nanotubes
6+ day, 1+ hour ago (117+ words) lead image Ren et al. sought to use computational techniques to uncover the thermal behavior of carbon nanotubes. Previously, researchers used mode-coupling theory to explore the properties of 1D lattices, which could serve as idealized models of carbon nanotubes. This method…...
Expanding the potential of metal halides for deep ultraviolet photodetectors
1+ week, 6+ day ago (97+ words) AIP.ORG “Our results show that low-dimensional inorganic copper halides can simultaneously deliver the key attributes required for practical DUV optoelectronic devices,” said author Wensi Cai. Finally, to study stability, the team performed imaging measurements, both after long durations and…...
Controlling plasmas with linear and nonlinear feedback mechanisms
2+ week, 4+ day ago (310+ words) AIP.ORG Controlling plasmas with linear and nonlinear feedback mechanisms lead image Kinetic instabilities strongly shape plasma behavior and remain a major challenge to achieving stable confinement in fusion-relevant conditions. Their onset has been studied extensively, but less is understood…...
Capturing the randomness of lipid flip-flopping
1+ mon, 3+ week ago (318+ words) lead image Biological membranes are made up of two asymmetric layers of lipids. While lipids can randomly flip-flop from one layer to the other, membrane proteins sort lipids between the two sides. Researchers want to better understand how lipid flip-flopping…...
Toward better identifying and targeting the physical properties of organic semiconductors
1+ mon, 3+ week ago (293+ words) lead image Since the first organic field-effect transistor was demonstrated in 1986, research in organic electronics has been dominated by the idea that the physics characterizing organic semiconductors is the same as that governing their inorganic counterparts. But many mechanisms behind…...
Reversing our understanding of propellers in non-Newtonian fluids
1+ mon, 3+ week ago (242+ words) lead image Microrobots are a compelling technology for biomedical applications from delivering drugs to taking precise diagnostics. But while robots’ behavior in Newtonian fluids of constant viscosity is well-studied, the human body contains non-Newtonian fluids that can influence microrobots’ movement…...
Simple model captures the essential physics of hohlraum
1+ mon, 3+ week ago (126+ words) lead image Hohlraums — tiny cavities that convert laser energy into X-rays — are central to inertial confinement fusion, yet their physics are notoriously complex. High-fidelity simulations of hohlraums require huge computational resources to model the interplay of radiation transport, plasma hydrodynamics,…...