녹색형광단백질로 구성된 분자광다이오드의 전자전달 특성

GFP는 박막상태에서 쉽게 전자소자로 제작할 수 있으며, 제작된 전자소자는 빛의 여부에 따라 흐르는 전류의 조절이 가능한 광다이오드 특성을 나타내는 것으로 확인되었다. 또한 박막상태에서의 일방향 전자전달 속도와 전자전달 메커니즘이 확인되어, 향후 분자전자소자의 제작시 기반기술로 제공될 수 있을 것으로 사료된다.

In recent years, various artificial molecular photodiode have been fabricated by mimicking the electron transport function of biological photosynthesis. And now, we have been investigated the protein-organic hetero thin film photodiode using GFP as an sensitizer based on the redox potential difference of functional molecules. In this paper, shows molecular photodiode consisting of green fluorescence protein(GFP). viologen and TCNQ. The TCNQ and viologen were deposited onto ITO coated glass by LB technique. And GFP molecule was adsorption onto the viologen LB film surface by self-assembly method. Finally, The Al deposition onto GFP/viologen/TCNQ film surface was performed to make a top electrode. As a result, The MIM(metal/Insulator/Metal) structured device was constructed. The input light of 460nm wavelength was generated by the xenon lamp system, and then the photocurrent produced from the molecular device was detected through a current-voltage(I-V) measuring unit (SMU Model 236, Keithley, USA). An artificial molecular photodiode using protein(GFP)-adsorbed hetero-LB film is presented as a model system for the bioelectronic device based on the biomimesis.