Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Organic nanofibers integrated by transfer technique in field-effect transistor devices | Tavares et al. Nanoscale Research Letters 2011 6 319 http content 6 1 319 o Nanoscale Research Letters a SpringerOpen Journal NANO EXPRESS Open Access Organic nanofibers integrated by transfer technique in field-effect transistor devices Luciana Tavares Jakob Kjelstrup-Hansen Kasper Thilsing-Hansen and Horst-Gunter Rubahn Abstract The electrical properties of self-assembled organic crystalline nanofibers are studied by integrating these on fieldeffect transistor platforms using both top and bottom contact configurations. In the staggered geometries where the nanofibers are sandwiched between the gate and the source-drain electrodes a better electrical conduction is observed when compared to the coplanar geometry where the nanofibers are placed over the gate and the source-drain electrodes. Qualitatively different output characteristics were observed for top and bottom contact devices reflecting the significantly different contact resistances. Bottom contact devices are dominated by contact effects while the top contact device characteristics are determined by the nanofiber bulk properties. It is found that the contact resistance is lower for crystalline nanofibers when compared to amorphous thin films. These results shed light on the charge injection and transport properties for such organic nanostructures and thus constitute a significant step forward toward a nanofiber-based light-emitting device. Background In the last decade much attention has been given to one-dimensional nanostructures due to their intriguing physics and in particular their application potential within for example electronics and optoelectronics 1-3 . Inorganic semiconducting crystalline nanowires made from . Si or III-V materials have been the focus of much research due to the ability to synthesize these in large numbers with well-defined properties which has led to the demonstration of nanowire field-effect transistors 4 5 multicolor light sources 6 lasers 7 .
