All-Optical Graphene Oxide Humidity Sensors
The optical characteristics of graphene oxide (GO) were explored to design and fabricate a GO-based optical humidity sensor. GO film was coated onto a SU8 polymer channel waveguide using the drop-casting technique. The proposed sensor shows a high TE-mode absorption at 1550 nm. Due to the dependenc...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2014-12-01
|
| Series: | Sensors |
| Subjects: | |
| Online Access: | http://www.mdpi.com/1424-8220/14/12/24329 |
| _version_ | 1811298253286670336 |
|---|---|
| author | Weng Hong Lim Yuen Kiat Yap Wu Yi Chong Harith Ahmad |
| author_facet | Weng Hong Lim Yuen Kiat Yap Wu Yi Chong Harith Ahmad |
| author_sort | Weng Hong Lim |
| collection | DOAJ |
| description | The optical characteristics of graphene oxide (GO) were explored to design and fabricate a GO-based optical humidity sensor. GO film was coated onto a SU8 polymer channel waveguide using the drop-casting technique. The proposed sensor shows a high TE-mode absorption at 1550 nm. Due to the dependence of the dielectric properties of the GO film on water content, this high TE-mode absorption decreases when the ambient relative humidity increases. The proposed sensor shows a rapid response (<1 s) to periodically interrupted humid air flow. The transmission of the proposed sensor shows a linear response of 0.553 dB/% RH in the range of 60% to 100% RH. |
| first_indexed | 2024-04-13T06:16:47Z |
| format | Article |
| id | doaj.art-f575c70159b146aebed62e672b7fc358 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T06:16:47Z |
| publishDate | 2014-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-f575c70159b146aebed62e672b7fc3582022-12-22T02:58:48ZengMDPI AGSensors1424-82202014-12-011412243292433710.3390/s141224329s141224329All-Optical Graphene Oxide Humidity SensorsWeng Hong Lim0Yuen Kiat Yap1Wu Yi Chong2Harith Ahmad3Photonics Research Centre, University of Malaya, Kuala Lumpur 50603, MalaysiaPhotonics Research Centre, University of Malaya, Kuala Lumpur 50603, MalaysiaPhotonics Research Centre, University of Malaya, Kuala Lumpur 50603, MalaysiaPhotonics Research Centre, University of Malaya, Kuala Lumpur 50603, MalaysiaThe optical characteristics of graphene oxide (GO) were explored to design and fabricate a GO-based optical humidity sensor. GO film was coated onto a SU8 polymer channel waveguide using the drop-casting technique. The proposed sensor shows a high TE-mode absorption at 1550 nm. Due to the dependence of the dielectric properties of the GO film on water content, this high TE-mode absorption decreases when the ambient relative humidity increases. The proposed sensor shows a rapid response (<1 s) to periodically interrupted humid air flow. The transmission of the proposed sensor shows a linear response of 0.553 dB/% RH in the range of 60% to 100% RH.http://www.mdpi.com/1424-8220/14/12/24329graphene oxidehumidity sensingoptical sensing |
| spellingShingle | Weng Hong Lim Yuen Kiat Yap Wu Yi Chong Harith Ahmad All-Optical Graphene Oxide Humidity Sensors Sensors graphene oxide humidity sensing optical sensing |
| title | All-Optical Graphene Oxide Humidity Sensors |
| title_full | All-Optical Graphene Oxide Humidity Sensors |
| title_fullStr | All-Optical Graphene Oxide Humidity Sensors |
| title_full_unstemmed | All-Optical Graphene Oxide Humidity Sensors |
| title_short | All-Optical Graphene Oxide Humidity Sensors |
| title_sort | all optical graphene oxide humidity sensors |
| topic | graphene oxide humidity sensing optical sensing |
| url | http://www.mdpi.com/1424-8220/14/12/24329 |
| work_keys_str_mv | AT wenghonglim allopticalgrapheneoxidehumiditysensors AT yuenkiatyap allopticalgrapheneoxidehumiditysensors AT wuyichong allopticalgrapheneoxidehumiditysensors AT harithahmad allopticalgrapheneoxidehumiditysensors |