Application Study Of Fullerene Modified BLM On ITO Conducting Glass In Photoelectric Effect And Sensor

The self-assembled lipid bilayer membrane(BLM), the crucial component of biomembrane, is a naturally ordered, liquid-crystalline structure in a fluid-like dynamic state. The unique membrane can be dramatically modified or incorporated by functional materials such as enzyme, protein and nanoparticles, etc. Modified and functional BLM possesses the redox and photoelectronic properties, which has generated the great possibility of developing nano-scale biosensor and molecular electronic device. However, the selection of new functional material is as important a key as the enhancement of BLM's stability and disturbing-resistance in making the BLM system into practice. Our experiments produce an ITO supported BLM system, and study it through electrochemical and photoelectric techniques.In this thesis, the preparation of ITO/BLM system is introduced. Compared with other BLM systems, this novel ITO/BLM system shows advantages such as better stability, faster formation and longer lifetime, which is an ideal model for studying biomembrane function.The photoelectric properties of ITO/C60-BLM are studied by Cyclic Voltammetry ( CV ) and Electrochemical Impedance Spectroscopy ( EIS ) . Experiments prove C60 a good electron carrier. C60 modified ITO/BLM system possesses the fine photoelectric response, suggesting a great market potential of the development of photoactive molecular electric device.C70 is also proved an excellent functional material. C70 modified ITO/BLM system highly increases the detection sensitivity to I" by a limitation of 10"9M, 10-fold increase comparing with the reported highest sensitivity of C60 modified BLM system. Like C60, C70 is a promising functional material of high sensitivity.The thesis prospects for further molecular spectroscopic research of ITO/BLM system. The combination of electrochemical method and surface enhanced Raman spectroscopy technique may get much more information about membrane and lipid molecule macroscopically and microcosmically, and may establish a new means toanalyze interaction between functional material and lipid molecule.