光触发开关可切换的生物电子FET器件
Light-triggered on/off-switchable bioelectronic FET device
摘要：
我们报道了一种基于紫膜薄膜和单壁碳纳米管（SWNT）的光学活性生物电子器件的制备。光活性细菌视紫红质的二维（2D）晶体形成紫膜的光学中心，其中纯SWNT为复合物提供必要的电子支持。利用单壁碳纳米管表面功能化技术，制备了具有电光功能的稳定的杂化复合物。拉曼光谱的混合复合物显示显着的电荷转移和表面功能化的单壁碳纳米管。利用激光直接光刻技术和传统的剥离技术制备了基于生物-纳米复合物薄膜的光活性场效应晶体管。在所制造的场效应晶体管中观察到显著的光学掺杂。制造的器件显示出可重复的稳定性能，具有良好控制的光学和电子门控。器件基本上显示n型FET特性，晶体管在正栅极电压下导通。然而，相同的n型FET在可见光照射下显示出互补的p型特性，其中晶体管在负栅极电压下导通。观察到显著的光掺杂、光电导和光开关。
英文摘要：
We report fabrication of an optically active, bio-electronic device based on thin film of purple membrane and single walled carbon nanotubes (SWNT). Two dimensional (2D) crystals of photoactive bacteriorhodopsin forms the optical center of the purple membrane where as pure SWNTs provides the necessary electronic support to the complex. Electro-optically functional and stable, hybrid complex was prepared using surface functionalization of SWNTs with indigenous, batch-process synthesized purple membrane. Raman spectra of the hybrid complex shows significant charge transfer and surface functionalization of SWNTs. Optically active, field effect transistor based on the prepared thin film of bio-nano hybrid complex is fabricated using direct laser lithography and conventional lift off technology. Significant optical doping is observed in the fabricated field effect transistor. Fabricated devices show repeatable stable performance with well-controlled optical and electronic gating. Device shows essentially n-type FET characteristics and transistor is ON for positive gate voltages. However, same n-type FET shows complimentary p-type characteristics under visible light illumination, with transistor being ON for negative gate voltages. Significant optical doping, photo-conductivity and optical switching were observed.
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