Measuring molecular orientation in nanoscale gaps using enhanced vibrational spectroscopy

May 12, 2025 A nanoscale spectroscopy technique reveals the orientation of surface-bound molecules with sub-nanometer precision by confining light in a near-field region between a scanning probe and substrate. (Nanowerk News) Vibrational sum-frequency generation (VSFG) spectroscopy is a nonlinear optical method widely used to study how molecules are arranged and...