Synthesis and Characterization of a Pyromellitic Diimide-Based Polymer with C- and N-Main Chain links: Matrix for Solution-Processable n-Channel Field-effect Transistors.

A highly soluble pyromellitic diimide-based polymer was obtained through imidization polymerization. The novel architecture features diimide subunits linked alternately at 3-6 and N,N' positions. The polymer is highly transparent in the near ultraviolet-visible regions.

Digital Inverter Amine Sensing via Synergistic Responses by n and p Organic Semiconductors.

Chemiresistors and sensitive OFETs have been substantially developed as cheap, scalable, and versatile sensing platforms. While new materials are expanding OFET sensing capabilities, the device architectures have changed little. Here we report higher order logic circuits utilizing OFETs sensitive to amine vapors.

Channel length scaling in graphene field-effect transistors studied with pulsed current-voltage measurements.

We investigate current saturation at short channel lengths in graphene field-effect transistors (GFETs). Saturation is necessary to achieve low-output conductance required for device power gain. Dual-channel pulsed current-voltage measurements are performed to eliminate the significant effects of trapped charge in the gate dielectric, a problem common to all oxide-based dielectric films on graphene.

Expeditious synthesis of contorted hexabenzocoronenes.

Contorted hexabenzocoronenes (HBCs) have been synthesized in an expedited manner utilizing a double Barton-Kellogg olefination reaction and a subsequent Scholl cyclization. The scope of both transformations was investigated using a series of pentacene quinones and double olefin precursors. The utility of these reactions to help create functionalized and oligomeric HBCs in a rapid manner is demonstrated.

Transferring self-assembled, nanoscale cables into electrical devices.

This study details a new derivative of the contorted HBCs that self-organizes into one-dimensional, single-crystalline fibers. X-ray diffraction, transmission electron microscopy, and electron diffraction studies show that they have an orthorhombic unit cell with dimensions of 5.8 nm x 4.