top of page

Our Team

Join us! We are a unique group of individuals, highly energetic, and multidisciplinary. There is a strong emphasis on lasers and optics with a keen curiosity of the scientific unknown in complex materials.

The group atmosphere is friendly, talkative, collaborative yet independent with a good deal of intellectual latitude.

image.png

Postdoctoral Associate

Prasenjit Srivastava

Ph.D. The University of Kansas                 

             Physical Chemistry         

             Advised by Christopher G. Elles

M.Sc. in Chemistry, Institute of Chemical Technology                         Organic Chemistry            

             Advised by Bhalchandra M. Bhanage

B.Sc. in Chemistry, St. Xavier’s College

IMG_4473_edited.png

3rd year PhD student

Natalie Warren

B.S.  The College of William & Mary

Natalie is from Bryans Road, Maryland and graduated from the College of William & Mary in 2022 with a major in Chemistry and a minor in Physics. She is an avid sports fan, spends most of her time cuddling with her dog Nina, and loves anything outdoors.

IMG-20230921-WA0007_edited_edited.jpg

3rd year PhD student

Umar Yunusa

M.S.  Bayero University 

B.S.  Ahmadu Bello University

Umar holds a bachelor's and master's degree in chemistry, and is interested in development of nanostructured materials for applications in catalysis and renewable energy. He enjoys travelling and watching documentaries.

profile_pic.jpg

2nd year PhD student

Elizabeth Donahue

B.S.  Boston College

Elizabeth is from Peabody, Massachusetts. She graduated with her bachelor's degree in chemistry from Boston College in 2023. Outside of lab, she enjoys listening to music, playing piano, attending concerts, knitting, and crocheting. 

IMG_4173.heic

2nd year PhD student

Andes Willemsen

B.S.  Northeastern University

Andes is from Lexington, Massachusetts and graduated from Northeastern University with a B.S. in Chemistry where he synthesized supramolecular photoredox catalysts with Prof. Hannah Sayre. He is interested in studying photochemical reactions in plasmonic confinement with ultrafast and steady state spectroscopy. Outside the lab, he enjoys cooking, soccer and rock climbing.

pic Yuanqing_edited.jpg

2nd year PhD student

Yuanqing Yun

B.S. Fudan University

Yuanqing is from Shanghai, China and obtained her bachelor's degree in Chemistry from Fudan University in 2023. She is interested in studying electrochemistry and photochemistry with SERS. In her spare time, she enjoys cooking, handcrafting, and playing video games.

PXL_20220722_041142475.MP (1).jpg

Visiting Scholar, Brown University 

Tomáš Malina

M.S. Charles University

B.S. Czech Technical University

Tomas is a visiting student from Prague, Czech republic, studying Biophysics at Charles University. His focus is artificial light-harvesting utilizing self-assembling photosynthetic pigments. Outside of lab, he enjoys most sports, hiking, playing guitar and various social activities.

peanuts-characters-lineup-resbve9zva6m527o-resbve9zva6m527o.png

Graduate Researcher

Kyra Watts

M.S. candidate Brown University

B.A.  Cornell University 

Physics major with minors in Computer Science, Music, and English

(coming soon)

image.png

Visiting Scholar, Brown University

David Schauer

Scientific Staff, ETH Zurich  

B.S.  Swiss Federal Institute of Technology 

David is an exchange student from Melk, Austria, studying Interdisciplinary Sciences (biochemical-​physical direction) at Swiss Federal Institute of Technology (ETH Zurich), where he most recently worked on plasmonic gold nanoparticles. In his free time, David enjoys reading and translating ancient philosophy, dangerous winter sports, and a wide range of outdoor activities, including rowing on lake Zurich.

 

david_schauer1@brown.edu 

image.png

Undergraduate Researcher

Zhanxian Gong

B.S.  Brown University '26

Zhanxian is from Beijing, China and is considering concentrating in Chemical Physics. In his freetime, he loves to listen to light music, learn Japanese (still at entry-level) and play board games with friends. 

 

 

zhanxian_gong@brown.edu

peanuts-characters-lineup-resbve9zva6m527o-resbve9zva6m527o.png

Undergraduate Researcher

Annika Svedlund

B.S.  Brown University '26

(coming soon)

IMG_150918_0.png

Undergraduate Researcher

Nicole Marion

I’m Nicole, from Bolivia, pursuing a B.S. in Biology with an interest in cell and molecular studies, especially in hands-on research related to cancer. I’m drawn to understanding molecular interactions and their impact on advanced diagnostics. In my free time, I enjoy designing and manufacturing structures for space-related research, playing tennis, swimming, singing, painting, and volunteering with Rotary Club International.

nicole_marion_villrroel@brown.edu

IMG_0809.jpg

Undergraduate Researcher

Benjamín Córdova Herrera

Brown University '26
Sc.B. Candidate in Chemical Engineering 
A.B. Candidate in East Asian Studies

Benjamín is from Seattle, Washington. He is currently a junior concentrating in Chemical Engineering and East Asian Studies. Outside the lab, he loves cooking, swimming and learning languages.  Benjamín is a joint student with the Sullivan and Martinez-Moreno lab in the Center for Spine Tumor and Chordoma Research in the Warren Alpert Medical School.

alfredo_cordova_herrera@brown.edu

peanuts-characters-lineup-resbve9zva6m527o-resbve9zva6m527o.png

New student 

Linus 'n Lucy 

Team member and group snacks

 

joe geiser_edited.jpg

Senior Research Technician

Joe Geiser

Department of Chemistry

joseph_geiser@brown.edu

Geo-Chem_Building_entrance,_Brown_University.jpg
Spectroscopy Of Soft Plasmonic Nanomaterials | Providence | Klein Lab

©2026 by Klein Lab.

  • Facebook
  • Twitter
  • LinkedIn

Geochemistry Building

324 Brook Street

Providence, RI 02912

bottom of page