Christelle Guillermier, PhD in Physics - Director of the CNI

Dr. Guillermier is an instrumental/experimental physicist, who received her Ph.D. from the Institute de Physique Nucleaire de Lyon, France. During a series of post-doctoral fellowships, she received training in Secondary Ion Mass Spectrometry, including the design and implementation of new instrumentation and research in fundamental SIMS, geo- and cosmo-chemistry, and material sciences.  In 2010, she joined NRIMS, where in addition to operating the Center's two NanoSIMS instrument, she has leveraged her expertise to develop new analytical methods for the exploration of biological samples.


Frank Gyngard, PhD in Physics - Lecturer on Medicine and Lab Manager

Frank obtained his PhD in Physics from Washington University in St. Louis, with an emphasis in astrophysics in 2009. He then matriculated to the Carnegie Institution for Science in Washington, D.C. as a Postdoctoral Fellow. He eventually returned to St. Louis to direct the NanoSIMS50 he used for his PhD. Frank’s research interests were primarily focused on multi-element isotopic studies of presolar/stardust grains. Specifically, he determined, for the first time, the cosmic ray exposure ages of individual grains by measuring Li isotopic ratios in presolar SiC grains. These are the oldest objects in the Solar System ever dated.

Along with Larry Nittler, Frank has also been involved in the development of an automated measurement system for the NanoSIMS50/50L that can be used to search for ultra-rare stardust grains, isotopically labeled cells, and biological features. He plans to continue to apply micro-analytical techniques to search for isotopic and elemental compositions in various materials that push the limits of our current understanding of nucleosynthesis and galactic chemical evolution in stars, but also that of biological processes.

Recently he dipped his toes into the waters by applying MIMS to study Aβ plaques in people with advanced Alzheimer’s disease. After moving to Boston, he started working in the CNI NanoSIMS50L lab and now oversees the management of its day-to-day operation; his research is now almost completely bio-centric. And on rainy days with nothing else to do, he sometimes even thinks about taking a sledgehammer to the machine.