Researchers at UC San Diego have proposed a novel technique called ultrafast vortex electron diffraction that enables direct visualization of electron movement in molecules at attosecond timescales. This method utilizes a specialized electron beam that spirals as it travels, allowing for precise tracking of electron motion in both space and time. This is particularly sensitive to electronic coherence, where electrons move in a synchronized manner, unlocking new possibilities for studying quantum processes like energy transfer and electron behavior in advanced materials.
Electrons are incredibly fast. Because of their ultrafast motions, directly observing their behavior has been challenging. Now researchers have suggested a new method to make visualizing electron motion a reality.
Electrons oscillate around the nucleus of an atom on extremely short timescales, typically completing a cycle in just a few hundred attoseconds . Because of their ultrafast motions, directly observing electron behavior in molecules has been challenging. Now researchers from UC San Diego's Department of Chemistry and Biochemistry have suggested a new method to make visualizing electron motion a reality. This new method describes an experimental concept called ultrafast vortex electron diffraction, which allows for direct visualization of electron movement in molecules on attosecond timescales. The key idea behind this approach is the use of a specialized electron beam that spirals as it travels, enabling precise tracking of electron motion in both space and time. This method is especially sensitive to electronic coherence, where electrons move in a synchronized, harmonious manner. By effectively isolating such coherent electron dynamics from other competing processes, this technique unlocks new opportunities to study quantum processes, such as energy transfer and electron behavior in advanced materials, providing deeper insights into the fundamental behavior of molecules and materials., was led by Haowei Wu and Haiwang Yong . Their research was supported in part by the W. M. Keck Foundation through computing resources at the W. M. Keck Laboratory for Integrated Biology at UC San Diego. "This technique's exceptional sensitivity to electronic coherences unlocks new possibilities for visualizing ultrafast quantum phenomena in molecules, bringing us closer to the ultimate goal of controlling chemical reactions at the most fundamental level." -- Haiwang YongSynchronizing periodic excitations of photocatalysts with a Michelson interferometer on operando FT-IR spectroscopy, researchers succeeded in observing and identifying the reactive electron species ... Scientists have shown that the powerful transient absorption spectroscopy technique can unravel ultrafast motion of electrons and nuclei in a molecule in real time and with atomic spatial ... Scientists have built a compact electron camera that can capture the inner, ultrafast dynamics of matter. The system shoots short bunches of electrons at a sample to take snapshots of its current ... Using SLAC's high-speed 'electron camera,' scientists simultaneously captured the movements of electrons and nuclei in a light-excited molecule. This marks the first time this has been ...300 New Intermediate-Mass Black Holes Plus 2500 New Active Black Holes in Dwarf Galaxies Discovered
ELECTRON MOTION ATOMIC SCALE QUANTUM PROCESSES COHERENCE MOLECULAR DYNAMICS
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