A Sharper Nanoscale View of Surface Molecules - Summary - MDSpire
From the Journals

A Sharper Nanoscale View of Surface Molecules

Delay-controlled tip-enhanced sum frequency generation suppresses metallic background and reveals weak vibrational modes and molecular orientation

  • April 7, 2026

  • 2 min

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Researchers in Japan have enhanced tip-enhanced sum frequency generation (TE-SFG) spectroscopy, targeting weak molecular vibrations at surfaces. By integrating vibrational spectroscopy with a scanning tunneling microscope, they mitigated interference from metallic substrates using a temporally asymmetric near-infrared pulse. This innovation allowed for better differentiation between resonant and non-resonant signals, significantly improving the detection of subtle vibrational features. The technique also offered insights into molecular orientations, paving the way for tracking ultrafast molecular dynamics.

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A Sharper Nanoscale View of Surface Molecules

  • April 7, 2026

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