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- Title
Compliment Graphene Oxide Coating on Silk Fiber Surface via Electrostatic Force for Capacitive Humidity Sensor Applications.
- Authors
Kook In Han; Seungdu Kim; In Gyu Lee; Jong Pil Kim; Jung-Ha Kim; Suck Won Hong; Byung Jin Cho; Wan Sik Hwang
- Abstract
Cylindrical silk fiber (SF) was coated with Graphene oxide (GO) for capacitive humidity sensor applications. Negatively charged GO in the solution was attracted to the positively charged SF surface via electrostatic force without any help from adhesive intermediates. The magnitude of the positively charged SF surface was controlled through the static electricity charges created on the SF surface. The GO coating ability on the SF improved as the SF's positive charge increased. The GO-coated SFs at various conditions were characterized using an optical microscope, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), Raman spectroscopy, and LCR meter. Unlike the intact SF, the GO-coated SF showed clear response-recovery behavior and well-behaved repeatability when it was exposed to 20% relative humidity (RH) and 90% RH alternatively in a capacitive mode. This approach allows humidity sensors to take advantage of GO's excellent sensing properties and SF's flexibility, expediting the production of flexible, low power consumption devices at relatively low costs.
- Subjects
GRAPHENE oxide; ELECTROSTATICS; HYGROMETRY; SCANNING electron microscopy; COST effectiveness
- Publication
Sensors (14248220), 2017, Vol 17, Issue 2, p407
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s17020407