P2.3.14 Optical Waveguide Sensor Based on Transparent Nanocrystalline Diamond Film
- 14th International Meeting on Chemical Sensors - IMCS 2012
2012-05-20 - 2012-05-23
- P2.3 Sensors Based on Optical Techniques
- K. Lee, W. Lee - Electronic Materials R. C. (Korea) Institute of Science and Technology (Korea), H. Lee - Department of Materials Science and Engineering, Hanyang University (Korea)
- 1490 - 1491
Besides the excellent biocompatibility, covalent bonding with biomolecules, mechanical and chemical durability, recent progress in the growth of nanocrystalline diamond film with a smooth surface and a good transparency has motivated its use in optic-based biosensing. In this paper, we present and demonstrate the first visible-range optical waveguide sensor based on nanocrystalline diamond film. Hot-filament CVD method was used to synthesize the diamond film and the deposition conditions were carefully controlled. Attenuated total reflection type waveguide sensor scheme was adopted and the guided mode dip was monitored in response to the refractive index of surrounding medium. The feasibility test with glucose solutions confirmed that the nanocrystalline diamond film is a promising candidate for the application to optical waveguide sensor.