BeANs Lab access BeANopedia, wiki, protocols, recipes, etc.


Free counters!


Research Project

Photoelectrochemical System

Photosynthesis is a process where light energy from the sun catalyzes the production of carbohydrates from carbon dioxide and water.


Photosynthesis reaction can be divided into two categories, light reaction that transfers electron from water splitting reaction, and dark reaction that produces carbohydrates through the electron transfer chain.
In the higher plants, several complex photosynthetic reactions occur in a reaction center called photosystem (PS) which are located within the thylakoid membrane. PS-s are network of light absorbing pigments and electron transporters. Two photosystems are present: Photosystem I (PSI) and Photosystem II (PSII) which contain different chlorophyll molecules. Chlorophyll molecules, P680 in PSII and P700 in PSI, receive energy from the light, and boost the electrons produced in the water-splitting reaction into a higher energy level, that are subsequently used in the dark reaction.


Lam KB, Johnson EA, Chiao M, Lin L, A MEMS Photosynthetic Electrochemical Cell Powered by Subcellular Plant Photosystems. Journal of Microelectromechanical Systems 2006. 15(5): p. 1243- 1250.

Our focus in this research is to understand electron transfer/tranport within solar photoelectrochemical system from the biological entity to electrode surfaces. We are embarking on the screening of various organisms as well as isolated chloroplast / photosystem complex, for the highest photosynthetic activity and focus on the interfacial interactions. Stabilization strategy and integration onto solid substrate will be our future approach to build functional device.