Xinning Zhang (PI)

Position: Faculty
Title: Assistant Professor
Office:  152 Guyot Hall, Washington Rd., Princeton, NJ 08544
Phone: (609) 258 - 2489
Assistant: Eva Groves (
Xinning is an environmental microbiologist in the Department of Geosciences at Princeton University. She obtained her B.S. in Biological and Environmental Engineering from Cornell University in 2004 and Ph.D. in Environmental Science and Engineering from the California Institute of Technology in 2010. Her research interests encompass the coupling of biogeochemical cycles through microbial physiology, the impact of microbial metabolism on stable isotope records, co-evolution of microbial life and the geochemical environment, and microbial nutrient acquisition strategies. 



Shannon Haynes


Position: Lab manager / research specialist 
Office:  157 Guyot
Phone: 609-258-4674


Romain Darnajoux


Position: LSRF Postdoctoral research fellow
Office:  158 Guyot
Phone: 609-258-1052

Katja Luxem

Position: Graduate student
Office:  158 Guyot Hall
Phone: (609) 258-2612
Katja is a graduate student in the Geosciences department who is studying canonical and alternative nitrogenases in model N fixers and the environment. She received her B.S. from the California Insitute of Technology in 2014 and was a Fulbright scholar in 2015-2016.


Eunah Han


Position:  Graduate student
Office:  157 Guyot Hall
Phone: 609-258-4674



Kelly Van Baalen


Position:  PEI summer  undergrad researcher



Kayla Dobies


Position:  PEI summer undergrad researcher




Previous group members 



Carol Chiu

Position: Undergraduate, CBE 2017
Carol graduated with a B.S. in Chemical and Biological Engineering in 2017. Carol's work aimed at understanding the diversity of canonical Mo and alternative nitrogenases in model microbial communities.

Allison Lee

Position: Undergraduate
Allison is an undergrad majoring in Ecology and Evolutionary Biology. During 2016-2017, she studied the mechanisms underlying 15N fractionation in model N fixers, focusing on growth rate and Fe availability. She also doesn't mind accompanying Xinning for a day of field work in the mud!