Compliment Graphene Oxide Coating on Silk Fiber Surface via Electrostatic Force for Capacitive Humidity Sensor Applications
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...
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-02-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/17/2/407 |
| _version_ | 1798041420088475648 |
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| author | Kook In Han Seungdu Kim In Gyu Lee Jong Pil Kim Jung-Ha Kim Suck Won Hong Byung Jin Cho Wan Sik Hwang |
| author_facet | Kook In Han Seungdu Kim In Gyu Lee Jong Pil Kim Jung-Ha Kim Suck Won Hong Byung Jin Cho Wan Sik Hwang |
| author_sort | Kook In Han |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-04-11T22:21:17Z |
| format | Article |
| id | doaj.art-b583dfa8634b4df2a4a9da6d949e4761 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T22:21:17Z |
| publishDate | 2017-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-b583dfa8634b4df2a4a9da6d949e47612022-12-22T04:00:06ZengMDPI AGSensors1424-82202017-02-0117240710.3390/s17020407s17020407Compliment Graphene Oxide Coating on Silk Fiber Surface via Electrostatic Force for Capacitive Humidity Sensor ApplicationsKook In Han0Seungdu Kim1In Gyu Lee2Jong Pil Kim3Jung-Ha Kim4Suck Won Hong5Byung Jin Cho6Wan Sik Hwang7Department of Materials Engineering, Korea Aerospace University, Goyang 10540, KoreaDepartment of Materials Engineering, Korea Aerospace University, Goyang 10540, KoreaDepartment of Materials Engineering, Korea Aerospace University, Goyang 10540, KoreaDivision of High Technology Materials Research & Molecular Materials Research Team, Korea Basic Science Institute, Busan 168-230, KoreaDivision of High Technology Materials Research & Molecular Materials Research Team, Korea Basic Science Institute, Busan 168-230, KoreaDepartment of Cogno-Mechatronics Engineering, Department of Optics and Mechatronics Engineering, College of Nanoscience and Nanotechnology, Pusan National University, Busan 46241, KoreaDepartment of Electrical Engineering, KAIST, Daejeon 34141, KoreaDepartment of Materials Engineering, Korea Aerospace University, Goyang 10540, KoreaCylindrical 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.http://www.mdpi.com/1424-8220/17/2/407graphene oxide coatingelectrostatic forcecapacitive sensorhumidity sensor |
| spellingShingle | Kook In Han Seungdu Kim In Gyu Lee Jong Pil Kim Jung-Ha Kim Suck Won Hong Byung Jin Cho Wan Sik Hwang Compliment Graphene Oxide Coating on Silk Fiber Surface via Electrostatic Force for Capacitive Humidity Sensor Applications Sensors graphene oxide coating electrostatic force capacitive sensor humidity sensor |
| title | Compliment Graphene Oxide Coating on Silk Fiber Surface via Electrostatic Force for Capacitive Humidity Sensor Applications |
| title_full | Compliment Graphene Oxide Coating on Silk Fiber Surface via Electrostatic Force for Capacitive Humidity Sensor Applications |
| title_fullStr | Compliment Graphene Oxide Coating on Silk Fiber Surface via Electrostatic Force for Capacitive Humidity Sensor Applications |
| title_full_unstemmed | Compliment Graphene Oxide Coating on Silk Fiber Surface via Electrostatic Force for Capacitive Humidity Sensor Applications |
| title_short | Compliment Graphene Oxide Coating on Silk Fiber Surface via Electrostatic Force for Capacitive Humidity Sensor Applications |
| title_sort | compliment graphene oxide coating on silk fiber surface via electrostatic force for capacitive humidity sensor applications |
| topic | graphene oxide coating electrostatic force capacitive sensor humidity sensor |
| url | http://www.mdpi.com/1424-8220/17/2/407 |
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