Organic Materials & Devices (OMD), Institute of Polymer Materials, University Erlangen-Nürnberg , Martensstraße 7, 91058 Erlangen, Germany.
ACS Nano. 2013 Dec 23;7(12):11427-34. doi: 10.1021/nn405488n. Epub 2013 Dec 2.
Approaches for the selective self-assembly of functionalized carbon allotropes from solution are developed and validated for 0D-fullerenes, 1D-carbon nanotubes and 2D-graphene. By choosing the right molecular interaction of self-assembled monolayers (serving the surface) with the functionalization features of carbon materials, which provide the solubility but also serve the driving force for assembly, we demonstrate a region-selective and self-terminating assembly of the materials. Active layers of the carbon allotropes can be selectively deposited in the channel region of thin-film transistor (TFT) devices by this approach. As an example for a 0D system, molecules of C60 functionalized octadecylphosphonic acids are used to realize self-assembled monolayer field-effect transistors (SAMFETs) based on a selective molecular exchange reaction of stearic acid in the channel region. For noncovalently functionalized single-walled carbon nanotubes (SWCNTs) and graphene oxide (GO) flakes, the electrostatic Coulomb interactions between the functional groups of the carbon allotropes and the charged head groups of a SAM dielectric layer are utilized to implement the selective deposition.
从溶液中选择功能性碳同素异形体的自组装方法已被开发并验证，适用于 0D 富勒烯、1D 碳纳米管和 2D 石墨烯。通过选择自组装单层（用于表面）与碳材料功能化特征之间的正确分子相互作用，为组装提供了溶解性和驱动力，我们证明了材料的区域选择性和自终止组装。通过这种方法，可以在薄膜晶体管 (TFT) 器件的沟道区域中选择性地沉积碳同素异形体的有源层。作为 0D 体系的一个例子，使用功能化的十八烷基磷酸 C60 分子来实现基于在通道区域中进行的硬脂酸选择性分子交换反应的自组装单层场效应晶体管 (SAMFET)。对于非共价功能化的单壁碳纳米管 (SWCNT) 和氧化石墨烯 (GO) 薄片，利用碳同素异形体的官能团与 SAM 介电层的带电头基之间的静电库仑相互作用来实现选择性沉积。
