Welcome

 

About Our Group:

We design, build and exploit new types of instruments that provide qualitatively new pictures of how chemical reactions occur. By coupling mass-selective vibrational spectroscopy with cryogenic ion processing, we are able to study a wide variety of chemical phenomena, including small molecule activation, gas-liquid interfacial chemistry, and intracluster hydrogen bonding.

News

June 4, 2026
We were joined by visitors Burak Tufekci from Kit Bowen’s lab and Alexandra Tsoukala from Radboud University in The Netherlands, who both shared their work with back-to...
June 4, 2026
Andrew DeBlase, Helen Zeng and Liv Moss joined Fabian Menges along with Payten Harville, who just happened to arrive in town to start her postdoc at UCSD.
May 26, 2026
Congratulations to Dr. Payten Harville on a very successful defense!  She was joined by many friends and her parents (pictured on the right). Payten has held the group...

Selected Publications:

Autobiography of Mark A. Johnson


Microcanonical Kinetics of Water-Mediated Proton Transfer in 4ABAH+‧(H2O)n=4-6 Clusters (ABA = Aminobenzoic Acid): A Model System for Size-Dependent Relaxation to Ergodic Behavior


Microcanonical Kinetics of Water-Mediated, Long Range Proton Transfer in Microhydrated 4-Aminobenzoic Acid