Post-doctoral Scholars  

Preeti Yadav

2021 Ph.D. CSIR-National Physical Laboratory, India
2015 M.Sc. University of Delhi, India
2013 B.Sc. University of Delhi, India
The field of organic electronics has come a long way in the past two decades with development of OLED, smartphone displays, colored light sources and portable solar cells which have become an integral part of our daily lives. These technological advancements are enabled by innovation in materials design along with device engineering. Since the future of organic electronics relies heavily on novel materials, there is urgent need to develop high performing organic materials by low-cost synthetic approaches. My research work focuses on molecular design and synthesis of conjugated polymers, and study of their structure-property relationships for organic electronic applications. 
E-mail: preeti.yadav [at]


Samantha Phan

2021 Ph.D. Department of Chemistry, University of Washington
2017 MSci Department of Chemistry, University of Washington
2014 B.S. University of Florida
Samantha received her Bachelor’s degree in Chemistry from the University of Florida while studying with Prof. Kirk Schanze on water soluble conjugated polymer synthesis and materials characterization. During a brief time for her Master’s she worked with Prof. Joshua Vaughan on developing super absorbent polymer hydrogels for expansion microscopy. In 2017, she joined Prof. Christine Luscombe’s group for her PhD and focused on (1) synthesizing environmentally benign semiconducting polymers with direct arylation and (2) studying microplastics in marine organisms with Raman spectroscopy and computer vision techniques. 
E-mail: samantha.phan [at]


Isha Sanskriti


Isha has a Ph.D. in Chemistry from Banaras Hindu University, India. Her research focuses on synthesis, characterization and application of metal nanoparticles as colorimetric probes for environmentally/biologically relevant analytes such as, sulphide, cysteine, homocysteine and glutathione. She studied the sensing mechanism, phenomenon of self-assembly as well as various factors affecting the optical properties of these materials. At OIST, she started with fabricating/synthesizing materials and later joined as a postdoc to work at the interface of Chemistry and Physics on Magnetic levitation of organic liquids. Following her passion for synthesizing smart materials, she is starting as a postdoc in pi-Conjugated Polymers Unit from February 2022.

Email: isha.sanskriti1[at] 


Wissem Khelifi

2019 Ph.D University of Pau et Pays de l’Adour, France
2012 M.Sc University of Claude Bernard, INSA, Ecole Centrale Lyon, France
2010 B.Sc, University of Claude Bernard Lyon 1, France
Wissem received his bachelor’s degree in chemistry in 2010, his master’s degree in material Science from University Claude Bernard Lyon 1, INSA, Ecole Centrale Lyon in 2012, respectively. Then, he worked as a research engineer at the Laboratory of Photopolymerization and photophysical characterization, Group Skene at University of Montreal, Canada where he was developing a new range of small-conjugated molecules for electrochromic application.
Then, he obtained his Ph.D. degree in polymer chemistry from the University of Pau in 2019. After graduation, he worked as an engineer in development and technology transfer at SATT Aquitaine at Pau where he was in charge for the development of new method for monomers and polymers semiconductor synthesis aiming an industrial production.
He has joined the group of Prof. Christine Luscombe at OIST as postdoctoral fellow. His current research activities aim to investigate the synthesis and design of stretchable Conjugated polymers for next generation wearable and implantable electronics. He will also be working on the study and the analysis of microplastic marine organisms using spectroscopy technics.

He loves Hiking, workout and cooking.

E-mail: wissem.khelifi [at]


Baitan Chakraborty

2021 Ph.D. Department of Chemistry, Jadavpur University, India
2014 M.Sc. Department of Chemistry, Jadavpur University, India
2012 B.Sc. Department of Chemistry, Jadavpur University, India
During his Ph.D., Baitan worked on the development of new cyclization strategies to access fused heterocyclic compounds containing nitrogen and oxygen. Most of his works focused on the exploitation of eco-friendly and cheap iron-catalysis. Earlier he had worked briefly on glycosylation reactions as part of his M.Sc. dissertation. He has joined OIST as a postdoctoral researcher in August 2022. His current research interest revolves around cross-dehydrogenative coupling (CDC) reactions for the syntheses of semiconducting pi-conjugated polymers. He is also motivated in achieving the target with successful application of iron-catalysis, avoiding the use of expensive and toxic transition metals. Music, literature and travelling are as integral parts of his life as is his research.
E-mail: baitan.chakraborty [at]


Fathy Hassan


Fathy started his interdisciplinary postdoctoral research at OIST in April 2023 under the supervision of Prof. Christine Luscombe and Prof. Síle Nic Chormaic. His research project aims to develop new functional materials with stimuli-responsiveness capabilities for photonics and optoelectronics. He received the Doctor of Science degree from the Graduate School of Science and Engineering, Saitama University, Japan in March 2018 under the supervision of Prof. Takuji Hirose. He received the Master of Science in Physical Chemistry from the Faculty of Science, Tanta University, Egypt under the supervision of Prof. Tarek Fayed in June 2014. He was a Postdoctoral Researcher at the Melville Laboratory of Polymer Synthesis at the University of Cambridge, UK under the supervision of Prof. Silvia Vignolini (January 2022- March 2023). He was a Fulbright Scholar at the Advanced Materials and Liquid Crystal Institute, Kent State University, Ohio, USA (August 2019-July 2020) at Prof. Quan Li research group. He was working for more than three years (December 2014-March 2018) as a Junior Research Associate at RIKEN Center for Emergent Matter Science, Wako, Saitama, Japan under the supervision of Prof. Yoshihiro Ito and Prof. Masuki Kawamoto. He is one of the faculty staff for both research and teaching at The Faculty of Science, Tanta University, Egypt since February 2012. 

E-mail: fathy.hassan [at]


Yuan-Qiu-Qiang Yi

2019 Ph.D. Nankai University, China 
2016 M.Sc. Nankai University, China 
After receiving his master’s degree from Nankai University, China, Yuan-Qiu-Qiang continued to pursue his doctor degree at the same university under the supervision of Prof. Yongsheng Chen. During his Ph.D. studies, his research was mainly focusing on the design and synthesis of non-fullerene acceptors for organic photovoltaics and corresponding device fabrications and morphology characterizations. 
In 2020, he joined Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Science (CAS) as a postdoctoral researcher in collaborations with Prof. Zheng Cui and Prof. Wenming Su. Facing the various challenges in inkjet-printed LEDs, he switched his research into developing cross-linking method for hole transport materials as well as controllable synthesis inorganic electron transport materials especially for QLEDs. 
In May 2023, Yuan-Qiu-Qiang has joined Christine Luscombe’s group at OIST to continue his research in developing novel semiconducting polymers in a sustainable way for stretchable electronics, bioelectronics, and other uses.
List of Publications:
Yuan-Qiu-Qiang Yi (Google Scholar)
Yuan-Qiu-Qiang Yi (ResearchGate Net
E-mail: yuan.yi [at]


Nadege Bonnet

2003 M. Sc, ENSIL Limoges, France
After completing her master’s degree in material science, Nadège worked as an engineer in the research and development department at HEF Group. Her work ranged from studying/developing vacuum deposited diamond -like coating to installing vacuum deposition equipment for mass production in Japan.  
She then joined Byon IRU at RIKEN/Wako, as a technical staff in charge of different research projects related to the understanding of electrochemical processes involved in metal-air batteries. Later, she moved to Bio-functional catalyst research team at Riken/Wako working on several collaborative research projects for the development of new bio-inspired manganese-based catalyst for water splitting in PEM (Polymer Electrolyte Membrane) electrolyzers. 
Then, she joined Prof. Christine Luscombe unit at OIST as a technician. Her research focuses on developing needle-type organic electrochemical transistor (OECT) devices for nanoscale bioelectronic applications.
E-mail: nadege.bonnet [at]

PhD Students

Nivedha Velmurugan

2019 M.Sc. Stella Maris College, Chennai, India
2017 B.Sc. Women's Christian College, Chennai, India

I received my MSc degree in 2019 from Stella Maris College, Chennai, India. My dissertation work was centred on the preparation of a Ru-based catalyst for the dehydrogenation of formic acid and bimetallic nanocatalysts in different compositions for the biomass conversion of furfural.

I joined OIST in Jan 2022, and my first lab rotation was with Prof. Christine Luscombe. Later, in Jan 2023, I joined the lab as a PhD student, and my thesis work will focus on the synthesis of a voltage-sensitive dye, ANNINE-6. A multi-step synthetic process that it is, C-H Arylation is my initial and immediate challenge, and I am tackling it One Step At A Time!

I read for academia, a little less than I read for pleasure. I am a natural at singing off-key and dancing off-beat. Please talk to me in Bollywood/Kollywood movie references.

E-mail: nivedha.velmurugan [at]



Tom Tassilo Wilfling

E-mail: tom.wilfling [at]



Abdulrahman Bakry

E-mail: abdulrahman-bakry [at]


Makiko Emori

E-mail: m.emori [at]


Syeda Bakhtawar Zahra

E-mail: s.zahra [at]

Rotation Student

Vadim Samardak

E-mail: v.samardak [at]

Visiting Research Student

Jonathan Ratmahal

Bachelor of Science Hons. in Biology (Major), Environmental and Natural Resource Management (Major), University of the West Indies, St. Augustine, Trinidad (2015)
Maste of Science in Biology, University of Tsukuba (2023)
Doctor of Philosophy in Biology, University of Tsukuba (2023-Present)
My name is Jonathan Josh Ramtahal, I am from Trinidad and Tobago where I lived before coming to Japan in 2020. After completeing my B.Sc. I worked as research assistant in Forest Ecology, Evnvironment Biology and Plant Ecophysiology and as a lab tutor as the University of the West Indies teaching the lab and tutorial components for Undergraduate courses in Biology and Ecology, where I became more interested in Marine Biology and Ecology which led me to pursue my current research on micropastics in the marine environment. My research interests include marine community ecology, environmental biology and marine ecophysiology.
E-mail: jonathan.ramtahal [at]


Research Unit Administrator


Midori Tanahara

Midori was born and raised in Okinawa, studied in Tokyo/Vancouver and joined OIST in 2008. She provides administrative support to the Christine Luscombe Group for the day-to-day running of the laboratory. Outside of work, she enjoys travelling, swimming and cooking.
E-mail: midori.tanahara [at]