Institut de Science et d'Ingénierie Supramoléculaires and International Center for Frontier Research in Chemistry, Université de Strasbourg and Centre National de la Recherche Scientifique, 8 allée Gaspard Monge, 67000 Strasbourg, France.
Proc Natl Acad Sci U S A. 2012 Jul 31;109(31):12375-80. doi: 10.1073/pnas.1203848109. Epub 2012 Jul 16.
Interface tailoring represents a route for integrating complex functions in systems and materials. Although it is ubiquitous in biological systems--e.g., in membranes--synthetic attempts have not yet reached the same level of sophistication. Here, we report on the fabrication of an organic field-effect transistor featuring dual-gate response. Alongside the electric control through the gate electrode, we incorporated photoresponsive nanostructures in the polymeric semiconductor via blending, thereby providing optical switching ability to the device. In particular, we mixed poly(3-hexylthiophene) with gold nanoparticles (AuNP) coated with a chemisorbed azobenzene-based self-assembled monolayer, acting as traps for the charges in the device. The light-induced isomerization between the trans and cis states of the azobenzene molecules coating the AuNP induces a variation of the tunneling barrier, which controls the efficiency of the charge trapping/detrapping process within the semiconducting film. Our approach offers unique solutions to digital commuting between optical and electric signals.
界面剪裁代表了在系统和材料中整合复杂功能的一种途径。尽管它在生物系统中无处不在，例如在膜中，但合成方面的尝试尚未达到相同的复杂程度。在这里，我们报告了一种具有双门响应的有机场效应晶体管的制造。除了通过栅极电极进行电控制外，我们还通过共混将光响应性纳米结构引入聚合物半导体中，从而为器件提供光学开关能力。具体而言，我们将聚（3-己基噻吩）与金纳米颗粒（AuNP）混合，金纳米颗粒涂有化学吸附的基于偶氮苯的自组装单层，作为器件中电荷的陷阱。涂覆 AuNP 的偶氮苯分子的顺反异构态之间的光诱导异构化引起隧穿势垒的变化，从而控制半导体膜内的电荷捕获/释放过程的效率。我们的方法为光学和电信号之间的数字转换提供了独特的解决方案。
