TEMPERATURE-DEPENDENT WATER UPTAKE BEHAVIOR OF CLUSTERS RELEVANT TO NEW PARTICLE
FORMATION
JOHN J. KREINBIHL, Department of Chemistry, Stony Brook University, Stony Brook, NY, USA; NICOL-
INE C. FREDERIKS, CHRISTOPHER J. JOHNSON, Chemistry, Stony Brook University, Stony Brook, NY,
USA.
New particle formation is a process in which trace vapors in the atmosphere cluster and grow into larger particles.
Recently, we have employed a multi-trap gas-phase ion preparation technique and cryogenic ion vibrational predissoci-
ation (CIVP) spectroscopy to identify common structural motifs for the uptake of water into cationic clusters relevant to
NPF. Here we further extend this exploration using a multi-trap gas phase variable temperature mass spectrometry (VTMS)
technique in which we probe the water uptake of clusters as a function of temperature to determine the associated ther-
modynamic parameters. We then seek to correlate these water uptake parameters to structural motifs present in the dry
clusters.