School of Chemical and Biomedical Engineering, Nanyang Technological University, 70 Nanyang Drive, Singapore 637457, Singapore.
Nanoscale. 2010 Aug;2(8):1474-9. doi: 10.1039/b9nr00375d. Epub 2010 Jun 8.
Bacteriorhodopsin-embedded purple membrane (bR-PM) is one of the most promising biomaterials for various bioelectronics applications. In this work, we demonstrate that a dipole bio-originated from bR-PM can bidirectionally mediate the performance of a bottom-contact TiO(2) nanowire field effect transistor (FET) for performance improvement. When negative gate voltage is applied, both transfer and output characteristics of the TiO(2) nanowire FET are enhanced by the bR-PM modification, resulting in a hole mobility increased by a factor of 2. The effect of the number of the deposited bR-PM layers on the normalized DeltaI(D) of the FET suggests that the additional electric field generated by the dipole moment natively existing in bR-PM actually boosts the performance of the TiO(2) nanowires FET.
细菌视紫红质嵌入紫色膜（bR-PM）是最有前途的生物材料之一，可用于各种生物电子应用。在这项工作中，我们证明了 bR-PM 产生的偶极子可以双向调节底接触 TiO2 纳米线场效应晶体管（FET）的性能，从而提高性能。当施加负栅极电压时，bR-PM 修饰均可增强 TiO2 纳米线 FET 的传输和输出特性，从而使空穴迁移率提高了 2 倍。施加在 bR-PM 上的负栅极电压改变了 bR-PM 中的偶极子方向，导致 bR-PM 中固有偶极子产生的附加电场实际上增强了 TiO2 纳米线 FET 的性能。
