Staff Scientist  

Zakaria Ziadi
zakaria.ziadi [at]

I completed my Ph.D. in electronic and electrical engineering from the University of the Ryukyus in 2015. My research in the Nanoparticle by Design Unit in OIST was focused on the understanding of gas phase synthesized nanoparticle effect on semiconducting nanowires based micro devices. My current research interest focuses on the effect of nanocarbon materials on graphene-based micro/nano devices and their applicability in gas sensing, bio sensing and optoelectronics.

Postdoctoral Scholars  

Xiushang Xu
xiushang.xu [at]

I received my bachelor’s degree (2013) in Applied Chemistry from the University of Shandong. I obtained my Ph.D. from Changchun Institute of Applied Chemistry under the supervision of Prof. Lixiang Wang in January 2019. My dissertation was on the design, synthesis and optoelectronic properties of novel light-emitting and electron transport materials based on spirobisilafluorenes as building blocks. My current research interest focuses on the bottom-up synthesis of novel nanocarbon materials with atomically-precise structures for optoelectronic devices and bioimaging.


I obtained my M.Sc. (Chemistry) from Kuvempu University, Karnataka. I received my Ph.D. in Chemical Science under the guidance of Dr. Santhosh Babu Sukumaran from CSIR-National Chemical Laboratory, Pune, India, in 2020. My Ph.D. focused on the design and synthesis of donor/ acceptor organic small molecules for lighting and light-harvesting applications. I also studied the charge carrier mobility and conductivity of donor-acceptor co-assemblies. My current research work is focused on the design and synthesis of nanographenes with zigzag and armchair edges for optoelectronic and photonic applications.
Google Scholar:

Jingyun Tan
jingyun.tan [at]

I studied applied chemistry and organic chemistry during my bachelor and master stages, respectively. Then in Jan 2020, I received my doctoral degree from University of Macau with a concentration in biomedical sciences. Organic molecule synthesis is the foundation of my research. Pursuing a suitable application for useful material is always the goal. My studies cover linear and nonlinear optics, chiroptics, bioimaging and sensing. My current research interests focus on the synthesis of polycyclic aromatic hydrocarbons (PAHs) and the exploration of their applications in the optical/biological fields.

Hao Zhao
hao.zhao [at]

I studied chemistry at Shaanxi Normal University (China) and obtained my bachelor’s degree in 2015. I received my PhD in organic chemistry from the Institute of Chemistry, Chinese Academy of Sciences in 2020. My current research interest mainly focuses on the synthesis of new multifunctional carbon nanomaterials for biosensing, bioimaging and biomedical therapeutics.


Hiroki Hanayama (JSPS Postdoctoral Fellow)
hiroki.hanayama [at]

I received my Ph. D. degree from The University of Tokyo under the supervision of Prof. Eiichi Nakamura in March 2021. During my Ph. D, I focused on transmission electron microscopic (TEM) analysis of organic molecules, especially in the supramolecular chemistry of cyclodextrins. My current research work focuses on the development of a structural characterization method for nanocarbon materials using TEM.


Visiting Researchers  

Sobi Asako
sobi.asako [at]

Sobi Asako was born in Yokohama, Japan. He obtained his Ph.D. in 2014 from the University of Tokyo (advisor: Prof. Eiichi Nakamura). In the same year, he was appointed assistant professor at Okayama University (the group of Prof. Kazuhiko Takai). In 2019, he moved to RIKEN Center for Sustainable Resource Science as a senior scientist. His research interests cover the exploration of sustainable organic synthesis and the design of conceptually new catalysts for challenging transformations.

Research Unit Administrator  

Ayumi Shimojima

I was born and raised in Chiba, Japan, and moved to Okinawa in 2009. I support the Unit from the administrative side, and I enjoy assisting members in achieving their scientific objectives. Beside work, I love traveling, dancing and swimming with dolphins.



Spurti Mulimani, Research Intern (RI) (April, 2022 -) 

Alicia Maria Gotz (Goetz), Special Research Student (SRS) (in OIST from May 2022) 


Rotation Students  

Academic Year 2021

May 2022 - August 2022  (Term 3)

Tom Tassilo Wilfling​

January 2022 - April 2022  (Term 2) 

Takatsugu Onishi
​Saurav Raj

Academic Year 2020

May 2021 - August 2021  (Term 3)

Samira Gmuer
​Rengo Yoshioka

January 2021 - April 2021 (Term 2)

Kuan-Lin Chen
Qizheng Zhang


Former members  

Mi Yan, Visiting Research Student (May 2021-June 2022) , Research Assistant (June 2022-July 2022)