New cover for Journal Of Physical Chemistry B! Dr. Alexander Korotkevich and Dr. Carolyn Jil Moll from the group of Prof. Huib Bakker at AMOLF show how sum frequency generation (SFG) spectroscopy can reveal the molecular orientation of anions at the water-air interface.

SFG is a powerful technique which can be used to analyze surfaces and interfaces. The cover represent the SFG generation process upon interaction of 800 nm and infrared light with carboxylate anions at the water–air interface. The background shows imaginary χ(2) spectra collected in SSP and SPS polarization combinations that reveal the molecular orientation of the anions.

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