Welcome to our group!

Tackling mechanisms of complex biological machines requires a multidisciplinary approach, and we are a highly multidisciplinary and very collaborative team consisting of chemists, biochemists and physicists. Although we work hard, we also love to socialise outside of the lab, building a strong support network within the group: people always make time to help each other out! Please scroll down to find out more about what our group members do.

Dr. Maxie M Roessler

Principal Investigator

Picture of MaxieI completed my PhD in Oxford in 2012, where I primarily worked on hydrogenases but first became interested in complex I and iron-sulfur cluster electron relays. I moved to my first independent positon at Queen Mary University of London in 2013 and in April 2019 my group relocated to Imperial College London.  

Besides science and everything to do with unpaired electrons, I have an affinity for different cultures and languages and am lucky to have grown up with French and Italian (besides German) and I later took the opportunity to spend 1.5 years in Beijing on a DAAD scholarship before starting my PhD. I am also an avid yogi and enjoy spending time with my family.

View Dr Roessler's website  

View Dr Roessler's CV (PDF)

Dr. Jana Eisermann

Post Doctoral Researcher, Feodor-Lynen Fellowship (Alexander von Humboldt Foundation)

Picture of Jana

I was born on 25th March 1993 in Plauen, a rather small town in the Free State of Saxony mainly famous for its production of chemical lace (called Plauen lace) and the German cartoonist Erich Ohser and his strip ‘Vater und Sohn’ (‘Father and Son’). After graduating from Gymnasium in 2011, I moved from my hometown to Halle/Saale and started studying Chemistry and Physics to become a secondary school teacher. Near the end of my teacher's studies I started working in the research group of Prof Dariush Hinderberger to examine the formation of small, colloid-like ionic clusters in solution, also referred to as ‘Ionoids’. After receiving my first state examination for teachers at the beginning of 2016, I pursued these studies throughout my PhD from April 2016 till December 2019.

Since the beginning of 2020, I started working as a Research Associate at Imperial College. My studies here are, in collaboration with the research group of Dr James Wilton-Ely, focussed on probing and comparing the mechanism of quinone reduction by photosynthetic and respiratory complex I. At this point, I would like to highlight the financial support from the 'Fonds der Chemischen Industry’ (https://www.vci.de/fonds/startseite.jsp) as well as the ‘Alexander von Humboldt Foundation’ (http://www.humboldt-foundation.de/web/home.html) for financial support for my past and present academic research.

Besides working at Imperial, one of my favourite things to do is listening to music and scouting for new bands and songs. Therefore, my old colleagues and I regularly exchange new music findings via email which are known as ‘music tips for the week’. 

Dr. Blaise Geoghegan

Post Doctoral Researcher

Born and raised in sunny West Sussex, I obtained my PhD in 2019 from the University of Brighton where my work focused on the synthesis and characterisation of Fe(II) spin-crossover complexes. in 2020 I moved to Germany to begin a postdoc at the Max Planck Institute for Chemical Energy Conversion, where I investigated the electronic structure of copper systems via advanced X-ray and pulsed EPR spectroscopies supported by computational methods. Currently, my project is focused on the development of EPR spectroscopic methodologies using state-of-the-art custom-built EPR resonators in order to push the limits of sensitivity.

When not in the lab or at the synchrotron, I can usually be found playing football or exploring European cities.

Adam Sills

4th year Ph.D. student, EPSRC

Picture of AdamI’m now a fourth year PhD student originally from Norfolk and did my MChem degree at Oxford. There I worked on enzyme cascades nanoconfined in porous electrodes for my fourth-year project in the Fraser Armstrong group. For my current project I am attempting to carry out protein film electrochemistry on whole respiratory complex I. This will allow the properties of the Ubiquinone reduction to be studied electrochemically and is an important first step towards investigating complex I with the novel PFE-EPR technique developed by the group. In my spare time I like to play the piano and cook, and also like to sit in the corner seat of the MSRH cafe.

Fang Fang

3rd year Ph.D. Student, Imperial CSC scholarship

Picture of FangI'm Fang Fang, from China, I graduated from Tsinghua University, majored in medicinal chemistry. While working towards master degree, my work was focused on the total synthesis of teixobactin and its analogue. In my PhD project, I will apply my knowledge in chemical synthesis and couple it to biochemistry, electroschemistry and EPR spectroscopy to gain insight into the mechanism of respiratory Complex I. In my spare time, I like running, yoga, and cooking.

Yunfei Dang

2nd Year Ph.D. student,  President’s scholarship

Picture of YunfeiI am from Shanxi, China. I completed my undergraduate at China university of Geosciences and then MRes in Nanomaterials at Imperial under supervision of Dr Maxie Roessler and Prof. Milo Shaffer. For my PhD project, I will work on combining film electrochemistry and EPR spectroscopy. This project will harness the full potential of film-electrochemical EPR by investigating novel electrode materials, with the aim of gaining a detailed understanding of the mechanisms of redox reactions via radical intermediates, as well as leading to a better design of catalysts.

Molly Parry

2nd year Ph.D. student (joint with Prof. George Britovsek)

Picture of MollyI grew up in Somerset and completed my MChem at the University of Edinburgh. I spent my final year abroad at Nanyang Technological University, Singapore where I worked on photocatalytic C-C cleavage in epoxides. My current project involves studying oxidative photocatalytic degradation of polymers and using EPR to identify the radicals present in this process. In my free time I love reading, baking bread and sewing.

Davide Facchetti

2nd year Ph.D. Student, PEPR-Bruker studentship

I am originally from Italy and I obtained an MSc in "Food Science and Technology" from the University of Milan, with a specialisation in Industrial Biotechnology. I did my thesis project in Kiel, Germany, working on the characterisation of beta-lactoglobulin fibrils in oil-water emulsions using EPR spectroscopy. Prior to joining the group, I also worked as a postgraduate researcher in the Department of Engineering at Lancaster University, UK. There, I focused my research on the development of a coating made of fibrils suitable for biomedical applications. The aim of my PhD project is to elucidate the mechanism of the enzymatic complex MsrQ/P present in many pathogenic bacteria as a defence system. During the project I will use different EPR techniques such as CW and pulsed together with electrochemical methods in order to elucidate the redox mechanism of the enzymes.

John Britton

1st year Ph.D. student (joint with Prof. Oscar Ces and Prof. Bill Rutherford), ICB CDT programme

Picture of John

I am a first year PhD student from London having completed my MSci degree in Chemistry at Imperial. In my final year, I used solid-state NMR and x-ray scattering to investigate the effect of a novel permeation enhancer on a skin mimetic.

Over the course of my Ph.D., I will be investigating the effect of membrane asymmetry on electron transfer on complex membrane proteins such as Respiratory Complex I and Photosystem II.

In my spare time, I enjoy walking, swimming and reading.

Sarah Chapman

1st year Ph.D. student (joint with Dr Laura Barter), ICB CDT programme, co-funded by Syngenta

Picture of Sarah

I’m Sarah, also from the flatlands of Norfolk, and I completed my chemistry undergraduate at the University of Manchester. In my final year I simulated DEER spectra of multi-spin [3]- and [4]- rotaxanes to predict their structures in frozen solution (supervised by Prof. E. McInnes and Dr A. Bowen). Over the course of my Ph.D., I will be investigating the photodegradation of agrochemicals on plant leaf surfaces using EPR spectroscopy, with the aim of using this information to improve sustainability of agrochemicals. In my spare time, I like to play trumpet and piano, and read novels (when time permits)!

Eleanor Clifford

1st Year Ph.D. student, PEPR-Bruker studentship

I completed my undergraduate and master's degree in Natural Sciences at University of Cambridge, specialising in chemistry. I undertook my masters research project in Dr Jenny Zhang’s group studying cyanobacterial exoelectrogenesis for the development of biophotovoltaic devices. During my PhD, I will use a combination of electrochemical techniques and EPR to study the activity and mechanism of photosynthetic complex I, a key component of the cyclic electron transfer pathway in photosynthesis. In my free time, I like reading, climbing and gymnastics.

Angeliki Chatziathanasiou 

MRes student (joint with Prof. Peter Nixon), ICB-CDT programme, co-funded by Syngenta

I was raised in Greece, and I completed my undergraduate and postgraduate studies in Chemistry at the University of Crete. As part of my Master’s in Biochemistry, I spent 3 months in Consiglio Nazionale delle Ricerche - Istituto di Ricerca sugli Ecosistemi Terrestri in Florence, Italy, as an Erasmus+ fellow. In my master’s thesis, I studied the production of hydrogen, Polyhydroxybutyrate, and Exopolysaccharides in photosynthetic bacteria.

I will be investigating binding mode of quinone-site inhibitors using EPR, ultimately with the aim to identify new inhibitors and improve agricultural sustainability.

In my spare time, I like hiking, reading, and travelling.

Christina Siakalli

MSci Student

My name is Christina and I am from Cyprus. I began my undergraduate studies in 2019, studying MSc Chemistry at Imperial College London. I have now joined the Roessler group to carry out my master’s project focusing on advances towards single spins using cryogenic preamplifiers and microresonators by investigating electron transfer in Fe-S clusters in respiratory complex I and photosynthetic complex I.

When I’m not in the lab or studying I enjoy travelling, exploring new cities, skiing and hiking!

Alumni - where are they now ?

Independent Fellow

  • Dr. Enrico Salvadori (2015-18) - Enrico joined us first on a joint position with UCL and then as the EPR Facility Research Fellow. He now holds a lectureship at the University of Turin (Italy).


  • Dr. Maryam Seif-Eddine (2019-23) - Maryam is now in the Biophysique des métalloprotéines group at the CNRS
  • Dr. John Wright (2018-19) - John is now a PostDoc at Judy Hirst Group in Cambridge.
  • Dr. Nolwenn le Breton (2015-17) - Nolwenn now has a permanent CNRS research position (ingénieur de recherche) at the Chemistry Institute at the University of Strasbourg, which is part of the national French EPR platform.
  • Dr. Ana Maria Esteves (2016-17) - Ana is now at the Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa (ITQB-UNL), Av. República, EAN, 2780-157 Oeiras, Portugal.

PhD students

  • Gemma McGuire (2019-23) - Dr. Gemma is now a Senior Research Scientist at Syngenta
  • Spiros Koutsoukos (2018-23) - Dr. Spiros is now a Post Doctoral Researcher with Tom Welton at Imperial College London
  • Katherine Richardson (2018-22) - Dr. Katherine is now a PDRA in the Photosynthesis group under the supervision of Professor Matt Johnson at the University of Sheffield.
  • Kaltum Abdiaziz (2016-20) - Dr. Kaltum is now a PostDoc in the EPR research group under Dr Alexander Schnegg at the Max Planck Institute for Chemical Energy Conversion.
  • Martina Cirulli (2015-19) - Dr. Martina is now Implementation Team Leader at YOOBIC
  • John Wright (2014-18) - Dr. John is now a PostDoc at Judy Hirst Group in Cambridge.

Master students

  • Luke Hutchings (2021-22)
  • Chengyi Liu (2021-22)
  • Charlie Parfitt (2021-22)
  • Peter Gonda (2021-22)
  • Flynn Rohr (2021-22)
  • Helin Wang (2021-22) - Working for AstraZeneca, China
  • Oliver Newman (2019-20)
  • Natalie (Hoi Chi) Hau (2019-20)
  • Yara Van Ingen - Project in collaboration with Andy Ashley Group (2019-2020) - PhD student at Cardiff University.
  • Chrisline Thomas (2017-18), Inorganic Chemistry project prize 2018 - Chemistry teacher
  • Adam Suhaj (2016-17) - PhD student at King's College London
  • Chagish Gnanaranjan (2016-17)
  • Nilab Rashidi (2016-17)
  • Michelle Liu (2015-16)
  • Anokhi Shah (2014-15) - Postdoctoral Research Associate at the University of Manchester
  • Hong Nhi Truong (2014-15)
  • Nicholas Pillay (2013-14)

BSc project students

  • Dilan Al (2017-18) - MRes Imperial College London

Summer students

  • Katrin Geng, Ulm University, Germany, DAAD RISE funded (2019)
  • Gemma McGuire, Imperial College London (2017) - returned as PhD student!
  • Chris Gusenda, University of Frankfurt, Germany, DAAD RISE funded (2017)
  • Camille Galateau, ESCOM (Ecole Normale de Chimie Organique et Minerale), Compiegne, France (2016)
  • Svenja Hehn, University of Konstanz, Germany, DAAD RISE funded (2016)
  • Sumeyye Altun, Bogazici University, Turkey, Erasmus + funded (2016)
  • Catalina-Andreea Romila, QMUL, RSC summer bursary (2014) - now a PhD student at UCL