Biomolecular photodiode consisting of cytochrome c-adsorbed hetero-Langmuir–Blodgett films
Biomolecular photodiode consisting of cytochrome c-adsorbed hetero-Langmuir–Blodgett films
复制标题
由细胞色素 c 吸附异质 Langmuir-Blodgett 薄膜组成的生物分子光电二极管
DOI：
10.1016/s0927-7765(01)00255-7
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
M. Fujihira
中科院分区：
文献类型：
--
作者：
Jeong;Yun;Byung;Hyun;W. Lee;M. Fujihira
研究了由蛋白质吸附异质langmuir - blodgett （LB）薄膜组成的生物分子光电二极管的光致电子转移。细胞色素c、紫素、黄素和二茂铁四种功能分子分别作为第二电子受体、第一电子受体、电子增敏剂和电子给体。通过将二茂铁、黄素和紫素沉积在预处理过的ITO玻璃上，制备了异lb膜。将异LB膜浸泡在含有细胞色素c的磷酸盐缓冲溶液中，制备了细胞色素c吸附的异LB膜。为了验证细胞色素c分子在紫质LB层上的最佳吸附条件，对LB膜进行了紫外吸收光谱和原子力显微镜观察。最后，通过在细胞色素c吸附的异质lb膜表面沉积铝，构建了金属/绝缘体/金属结构的分子器件。在光电响应特性方面，研究了该分子光电二极管的电流电压特性和光开关效应。为了验证电荷位移，测量了分子光电二极管的瞬态光电流。
Photoinduced electron transfer in biomolecular photodiode consisting of protein-adsorbed hetero-Langmuir–Blodgett (LB) films was investigated. Four kinds of functional molecules, cytochrome c, viologen, flavin, and ferrocene, were used as a second electron acceptor, a first electron acceptor, an electron sensitizer, and an electron donor, respectively. The hetero-LB film was fabricated by subsequently depositing ferrocene, flavin, and viologen onto the pretreated ITO glass. Cytochrome c-adsorbed hetero-LB films were prepared by soaking the hetero-LB films into the phosphate buffer solution containing cytochrome c. To verify the optimal adsorption conditions of cytochrome c molecules onto the viologen LB layers, the UV-absorption spectrum and atomic force microscopy observations of LB films were performed. Finally, the metal/insulator/metal structured molecular device was constructed by depositing aluminum onto the surface of the cytochrome c-adsorbed hetero-LB films. For photoelectric response properties, the current–voltage characteristic and photoswitching effect of the proposed molecular photodiode were investigated. To verify the charge shift, transient photocurrent of the molecular photodiode was measured.