Bioinspired Peptide Nanostructures for Organic Field-Effect Transistors

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• 作者：Thiago Cipriano ; Grant Knotts ; Amrit Laudari ; Roberta C. Bianchi ; Wendel A. Alves ; Suchismita Guha
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2014
• 出版时间：December 10, 2014
• 年：2014
• 卷：6
• 期：23
• 页码：21408-21415
• 全文大小：468K
• ISSN：1944-8252

文摘

Peptide-based nanostructures derived from natural amino acids are superior building blocks for biocompatible devices as they can be used in a bottom-up process without the need for expensive lithography. A dense nanostructured network of l,l-diphenylalanine (FF) was synthesized using the solid鈥搗apor-phase technique. Formation of the nanostructures and structure鈥損hase relationship were investigated by electron microscopy and Raman scattering. Thin films of l,l-diphenylalanine micro/nanostructures (FF-MNSs) were used as the dielectric layer in pentacene-based field-effect transistors (FETs) and metal鈥搃nsulator鈥搒emiconductor diodes both in bottom-gate and in top-gate structures. Bias stress studies show that FF-MNS-based pentacene FETs are more resistant to degradation than pentacene FETs using FF thin film (without any nanostructures) as the dielectric layer when both are subjected to sustained electric fields. Furthermore, it is demonstrated that the FF-MNSs can be functionalized for detection of enzyme鈥揳nalyte interactions. This work opens up a novel and facile route toward scalable organic electronics using peptide nanostructures as scaffolding and as a platform for biosensing.

Keywords:

field-effect transistors; peptide nanostructures; pentacene; electrochemical impedance spectroscopy