Principal Faculty Members

Jie
Jie Xu Ph.D.
Associate Professor
jie.xu.gail@asu.edu
LSC 532

Jie is an interdisciplinary scientist aiming to understand the smallest components of Earth and their biogeochemical roles; she is also a passionate educator trying to make science education attractive and thought-provoking. Jie got her doctoral degree from University of Wisconsin-Madison. 

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Postdoctoral Scientists

Andrew
Andrew Weitz Ph.D.
Assistant Research Scientist
LSE S41

Andrew received his PhD in Chemistry at Carnegie Mellon University, studying the spectroscopic properties of metal centers in enzymes and biomimetic complexes. In particular, he used Electron Paramagnetic Resonance and Mössbauer spectroscopies to elucidate the reactive intermediates in enzymatic cycles. Following his PhD, Andrew broadened his skills in his postdoctoral research at Boston University, where he learned molecular biology, anaerobic enzymology, and electrochemistry. At ASU, Andrew hopes to merge these ideas and explore, using spectroscopy and electrochemistry, how microbes interact with extracellular metal ions during lithotrophic growth. In his free time, Andrew likes to bike and swim, and is eager to learn photography while on outdoor adventures around Arizona. 

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Geng
Geng Yan Ph.D.
Postdoctoral Fellow
LSE S41

Geng obtained his Ph.D. from Tongji University (China) and worked on the monitoring of heavy metals in the environment. In the past three years, Geng's research mainly focused on microbial transformation of V(V) and Cr(VI) in contaminated environments. Geng also has experience studying the microbial community and metabolisms of Chloroflexi in hot springs.

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Graduate Students

Parvathi
Parvathi Rajan
PhD Student
LSE S41

Parvathi Rajan , pursuing PhD in biochemistry whose interests are in Microbiology and bioenergetics. She is an MSc graduate in biochemistry from University of Kerala, India, holding the university rank in her master's program and having previously topped the dual degree undergraduate program in Biochemistry and Industrial Microbiology.

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Tan
Tan Truong
PhD Student
nan
LSE S41

Tan got his bachelor’s degree from University of Science – Vietnam National University. His undergrad project was mainly about the application of nanoparticles on green catalysts. At ASU, he tries to explore how transition metal ions behave under different conditions. Apart from research, he is a badminton lover.

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Undergraduate Students

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TBR
Undergraduate Student
Please contact us if interested.

Alumni

Hugo
Hugo Alarcon
PhD Student

Hugo was born in Mexico. He completed a B.S. in Microbiology and an M.S. in Chemistry at UTEP.  Hugo is mostivated to use his multidisciplinary background to help solve some of the complex environmental problems that we face today. Hugo's work focuses on anoxygenic photosynthetic bacteria, especially their interactions with metal sulfide nanostructures.

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Grace
Grace Chong Ph.D.
Postdoctoral Fellow

Grace joined us for a relatively short time in the summer of 2022 from University of Southern California. Grace has helped significantly in the purple sulfur bacteria-metal sulfide work. Her focus was on the strain of Halorhodospira halophila. 

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Matt
Matthew Costa
Masters Student

Co-advised by Lin and Jie. Matt studied the trace metal behavior in the nanoscale components of coal fly ashes using combined geochemical and microbiological approaches.

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Christian Diaz
Undergraduate Student

Christian's work focused on biological Fe-V-sulfide system during his appointment. 

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Erica
Erica Herrera
Undergraduate Student

Erica's work focused on the abiotic sequestration pathways of molybdate under euxinic conditions. 


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Brandon
Brandon Lajoie
Masters Student

Brandon has double majors in Geology and Chemistry and joined us from upper state of Michigna. Brandon's work focused on the relationships of S-cycling bacteria and their mineralogical environment in White Sands and Badwater Basin. 


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Tony Malanche
Undergraduate Student

Tony's work focused on the extraction of nucleic acids from environmental samples and also the amplification of these extracted nucleic acid. 


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Muammar
Muammar Mansor Ph.D.
Postdoctoral Fellow

Muammar was a postdoc in the lab from July 2017 - Nov 2019. Muammar's work focused on the precipitation and transformation of multiple metal-sulfide systems in anoxic low-temperature aqueous condition. Muammar obtained his Ph.D. (specialized in Isotopic Geochemistry and Geomicrobiology) from Penn State.  

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Ezequiel
Ezequiel Moreno
Masters Student

Born and raised in Mexico, Ezequiel moved to the United States just in time for high school, where his passion for the earth sciences flourished. Ezequiel's work focused on capturing the transformation of biogenic versus abiogenic iron-sulfide nanoparticles in anoxic low-temperature aqueous environments.

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Rachel
Rachel Phillips
PhD Student

Rachel is a recipient of the Excellence Fellowship. Rachel's work focuses on the reactivity and fate of moybdate and thiomolybdate in various types of euxinic conditions. 

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Jason Pizzi
Undergraduate Student

Jason worked on analyzing the mineralogical compositions of samples obtained from the White Sands using XRD and SEM. 

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Humayra
Humayra Afrin
Rotating PhD Student

Humayra received her M.D. degree from Bangladesh. Her research interest lies in microbiology, especially those thriving in extreme environments.


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Copyright © Jie Xu 2024. Last updated: 2024-02-22 12 03