硅基底金纳米粒子微阵列电极的制备及其电化学性质的研究——多孔硅电致发光生物传感器研究的前期探索

Preparation of Gold Nano-arraied Electrode on Silicon Substrate and Its Electrochemical Properties——Probe into Biosensor Based on Electroluminescence of Porous Silicon

用Frens法制备了不同粒径的金纳米粒子,并用透射电镜、紫外可见分光光度法进行了表征.用自组装技术得到了金膜电极表面的金纳米粒子二维阵列电极,用扫描电镜、电化学等方法对该微阵列电极进行了表征.结果表明,当金电极表面被自组装膜完全覆盖后,电化学反应不再发生,而将金纳米粒子组装到膜上以后,才得到电化学信号.我们认为,金纳米粒子在这里对电荷的跨膜转移有很强的促进作用.对于该过程的研究,有助于理解电荷的转移机制,对进一步理解电荷隧穿过程有一定的指导意义.

Gold nano - particles of different sizes were synthesized using Frens method, the sizes of product were characterized by SEM and UV - Vis photometer. Nano - arraied gold electrodes were prepared by self assembled method and investigated by SEM and electrochemical methods. It showes that the electron transfer is blocked after the electrode is covered by the SAM, and gold nano - particles can greatly improve the capability of the electron transfer across the SAM. This result will probably help to study the mechanism of electron transfer across the SAM.