Basic Energy Sciences

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Enhancing metasurface performance potential
News Article, March 3, 2025 • By rotating the 𝐶3 symmetry breaking deformation ( 𝜑), the angular positions of the Dirac points and the corresponding polarization singularities for both bands can be controlled. New uses for metasurfaces in both regular and quantum optics are creating a need for better control over how light is polarized, especially...

Imaging gas-phase methyl radicals
News Article, March 3, 2025 • Positive and negative correlations of measured gas-phase methyl and formaldehyde with predicted surface coverages Scientists at Sandia are studying how certain chemical reactions happen on surfaces, especially when using special techniques that allows them to see what is occurring while the reactions are taking place. This is important because many...

Molecular monolayers control ultrafast charge and heat transfer in gold for plasmonic applications
News Article, August 24, 2026 • Sandia researchers explore how energy and charge move on ultrafast time scales between gold nano-islands and a single layer of 4-mercaptobenzoic acid (4MBA) molecules attached to their surface, a process at the core of emerging technologies like plasmonic sensors and photocatalysts, which have clear national-security implications for chemical detection and...

Stability of disconnections in solute atmosphere
News Article, March 3, 2025 • Disconnections, such as the disconnection dipole shown here from relaxed molecular dynamics simulations, are found on many grain boundaries and postulated to regulate boundary mobility. (b) An atomic-scale map of the segregation energy of dilute Ag atoms in a Cu matrix illustrating a zone of strong segregation (blue) for preferred...