论文标题:ITO导电玻璃支撑的富勒烯修饰双分子层脂膜的光电效应和传感器应用研究
Application Study of Fullerene Modified BLM on ITO Conducting Glass in Photoelectric Effect and Sensor
论文作者 常雷
论文导师 方炎,论文学位 硕士,论文专业 光学
论文单位 首都师范大学,点击次数 200,论文页数 98页File Size3448k
2002-05-01论文网 http://www.lw23.com/lunwen_1144647/ ITO导电玻璃;BLM;富勒烯;循环伏安;交流阻抗
ITO conducting glass;BLM;Fullerene(C_(60);CV;EIS
纳米尺度的人造双分子层膜(BLM)具有天然有序性、液晶结构和类似液体流动性等特点，可以嵌入其它功能材料(酶、蛋白质、纳米材料等)进行修饰。这种功能修饰的双分子层膜具有氧化还原和光电子特性，在发展为生物传感器和分子电子器件方面存在着巨大潜力。然而，BLM膜走向实际应用的关键在于提高膜的稳定性、抗干扰能力、延长膜的寿命以及新型功能材料的选择。本文制备了一种以ITO导电玻璃支撑的新型BLM膜系统，并采用电化学、光电化学检测手段对ITO／BLM膜系统以及富勒烯修饰的ITO／BLM膜系统进行了研究。 1．论文介绍了ITO／BLM膜系统的制备方法，并将该系统与其它BLM系统作比较。通过实验研究表明，ITO／BLM膜系统具有稳定性好、成膜速度快、寿命较长等许多优点，是一种更适于生物膜功能研究的理想模型。 2．采用循环伏安法和交流阻抗法对ITO／C_(60)-BLM膜系统进行了光电特性研究。实验表明，C_(60)是一种良好的电子载体，其修饰的ITO／C_(60)膜系统具有良好的光电响应，在发展为光敏性分子电子器件方面有着极大的市场潜力。 3．研究表明，C_(70)也是一种很好的功能材料，其修饰的ITO／BLM膜系统对Γ的检测灵敏度可达10~(-9)M，比C_(60)修饰的BLM膜对Γ的最高检测灵敏度高出10倍。因而，C_(70)与C_(60)一样，也是一种功能独特的高灵敏度材料，具有非常光明的应用前景。 4．论文对ITO／BLM膜系统在分子光谱学方面的研究进行了展望。综合运用电化学方法和表面增强拉曼光谱技术，能够从宏观和微观上获得膜系统和脂类分子的相关信息，为分析功能材料分子与膜系统中脂类分子的相互作用提供了很好的研究手段。
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.
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