| 초록 |
We present the use of reduced graphene oxide (rGO) and poly(diallyldimethylammonium chloride) (PDADMAC) complex for two different sensor applications: adherable temperature sensor and vapor detection sensor. The PDADMAC dispersed in a graphene oxide aqueous solution was dried and reduced to an rGO-PDADMAC complex with laser irradiation. The rGO-PDADMAC sensor was characterized with a scanning electron microscope and Raman spectroscopy. For the adherable temperature sensor, PDADMAC was used as a polymer matrix to provide enough viscosity applicable to any porous surface and make GO sheet dispersed stable, and the adherable temperature sensor of the rGO-PDADMAC complex to the porous structure of aramid fiber finally detected 55% sensitivity from 25°C to 100°C. For the vapor detection sensor, methyl salicylate (MeSA) vapor was chosen as a target analyte to validate the sensing system, and the rGO-PDADMAC complex was also utilized as a sensing matrix with a higher affinity to the MeSA vapor. The sensor based on the rGO-PDADMAC complex was used to measure the change in resistance in real time and finally detected 11% resistance variation induced by 14.5ppmv MeSA vapor over 540s. |
