Title :
A Biosensor for Simazine Herbicides Detection Using Sub-cellular Plant Photosystems
Author :
Lin, Yun Huin ; Luo, Lei ; Lin, Liwei
Author_Institution :
Energy & Environ. Res. Labs., Ind. Technol. Res. Inst., Hsinchu
Abstract :
A polypyrrole (PPy)-thylakoid bio-chemical sensor for herbicide detection has been successfully demonstrated by monitoring the level of inhibition of photosynthesis activities. Thylakoid isolated from baby spinach was deposit on top of the conductive polypyrrole between two electrodes as the foundation of the chemresistor sensing scheme. The metabolites generated in photosynthesis process changed the conductivity of PPy as the concentration of herbicides changed. Our experiment present ed that the combination of polypyrrole-thylakoid micro-gap structure is sensitive to the herbicide concentration to a measured level as low as 1 mug/liter of Simazine or 1 part per billion. As such, the micro-gap biosensor based on conductive polymer and sub-cellular plant photosystems provides a new platform suitable for herbicides detection
Keywords :
agrochemicals; biosensors; cellular biophysics; chemical sensors; conducting polymers; microsensors; photosynthesis; baby spinach; biosensor; chemresistor; conductive polymer; metabolites; microgap structure; photosynthesis inhibition; polypyrrole-thylakoid sensor; simazine herbicides detection; sub-cellular plant photosystems; Biochemistry; Biosensors; Conductivity; Electrodes; Electrons; Fabrication; Pediatrics; Polymers; Power engineering and energy; Protons; Biosensor; Photosystems; Simazine Herbicides; Sub-cellular;
Conference_Titel :
Nano/Micro Engineered and Molecular Systems, 2006. NEMS '06. 1st IEEE International Conference on
Conference_Location :
Zhuhai
Print_ISBN :
1-4244-0139-9
Electronic_ISBN :
1-4244-0140-2
DOI :
10.1109/NEMS.2006.334747
