| 초록 |
The fabrication of ultrasensitive gas sensors is critically important in various areas including semiconducting industries, chemical and material industries, medical welfare, and military defense. A wide variety of nanostructured materials such as silicon nanowires, carbon nanotubes, various metal oxide nanofibers and nanoparticles have been explored to fabricate ultrasensitive gas sensors. More recently, graphene, a single atomic planar sheet of carbon atoms that are densely packed into a honeycomb crystal lattice, has greatly attracted attention owing to its exceptional structural, mechanical, and electrical properties. In this presentation, we present a new 3D nanostructured RGO scaffold for ultrasensitive RGO gas sensors using an electrostatic self-assembly between graphene oxides (GOs) and electro-spun nanofibers, followed by reduction at room temperature. It demonstrates that the wrapping of interwoven electrospun nanofibers using molecular sheets of GO is a viable approach toward the fabrication of graphene-based ultra-sensitive gas sensors. These sensors show a 3.5 times stronger response toward NO2 gas than the RGO film based sensor. |
