Researchers reconstruct 3D wavefunction of a molecule
Researchers at the University of Göttingen combined advanced photoelectron spectroscopy with new algorithms to reconstruct the three-dimensional wavefunction of a nanometer-sized organic molecule. The imaging resolved features smaller than the spacing between carbon atoms, offering a detailed view of molecular orbitals. The work could enable watching wavefunction changes on femtosecond timescales.
The wavefunction is a core concept in quantum mechanics, yet it resists direct observation. To capture it, the team measured the momentum of electrons ejected from the molecule via photoelectron spectroscopy, then used custom-built algorithms to fill in the unmeasured portion of the data. The final reconstruction resolved details smaller than the distance between adjacent carbon atoms in the molecule.
A key advance was making the technique practical outside large synchrotron facilities. The Göttingen group paired a redesigned algorithm requiring far less experimental input with a lab-based soft-X-ray source capable of emitting ultrashort light pulses. This combination could enable time-resolved studies of wavefunction dynamics, potentially allowing researchers to observe molecular orbital changes as they occur on femtosecond timescales.
This technique could reshape how chemists and materials scientists study molecular behavior, offering a more direct window into the electronic structure that governs reactivity and light absorption. If the method matures, it may accelerate development of solar cells, catalysts, or quantum materials by revealing how orbitals evolve during key processes. Researchers in ultrafast science would gain a practical, lab-scale tool, though broader societal benefits depend on how readily the approach translates to other molecule types and experimental conditions.