8.5.6 Graphene Photo Detector with Integrated Waveguide Biochemical Sensors
- Event
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
Nürnberg/Nuremberg, Germany - Chapter
- 8.5 Optical absorbance-based Sensors
- Author(s)
- T. Hwang, A. Kulkami, T. Kim - Department of Mechanical Engineering, Sungkyunkwan University (Korea), J. Kim - SKKU Advanced Institute of Nano Technology (SAINT), Sungkyunkwan University (Korea)
- Pages
- 743 - 745
- DOI
- 10.5162/IMCS2012/8.5.6
- ISBN
- 978-3-9813484-2-2
- Price
- free
Abstract
In this study, we demonstrate the fabrication of graphene integrated waveguide device with graphene as a photo detector for bio-chemical sensor applications. The sensor principle relies on local evanescent wave intensity variation due to variation in analyte refractive index. For this purpose the graphene is transferred on to the fieldeffect transistor device and overlay of Polydimethylsiloxane (PDMS) is used as a waveguide. A 2 µl drop of glucose is placed on the PDMS and the change in the photocurrent is monitored. We observed that due to change in the refractive index of the glucose the local evanescent field has changed and hence the photoconductance of the graphene. We belive that this presented technology can be used for various other bio-chemicals.