High-selectivity eco-friendly hydrophilic gas sensor using the functional groups of graphene oxide coated on an aluminum oxide nanostructure

We propose an optical gas sensor using anodic aluminum oxide (AAO) and a graphene oxide (GO) layer to detect hydrophilic gas. In the proposed sensor, GO reacts with the induced gas to cause a change in the refractive index of the AAO surface, which can be optically detected by measuring the reflected wave on the surface of the device. By using the high… (More)