Investigation and Fabrication of nano optical sensor based on resonant microcavity structure 1D for determination organic concentration in liquid phase environment ( such as solvents: ethanol; the concentration of methanol desolved in fuels, atrazine in water and in humic acid).

- Theoretical results: Successfully fabricated photonic sensor based on one-dimensional porous silicon resonant wavelength in range 400-800nmm and successfully built the nano photonics sensor system to determine the concentration of organic matter (solvent, atrazine) in liquid environment with two methods: liquid phase sensor and vapor phase sensor using controlling the temperature and gas flow through the liquid to detect the concentration and type of solute.
- Applied results: Photonic sensors based on micro-resonant structures is used to measure the concentration of dissolved organic matter in the liquid environment. The device with two measurement methods have detected changes in the concentration of methanol in gasoline to 0.2%, detected concentrations of 0.8 pg / ml of atrazine in water and 1.4 pg / ml of atrazine in humic acids, concentration of 0.32 g / ml of α-endosulfan in water and 0.21 μg/ml β-endosulfan in water. The device also has the ability to detect methanol in alcohol with sensitivity and detection limits obtained at temperature of solutions 55 ° C and at the temperature of sensor 14oC is 5.19 nm /% and 0.0038% for ethanol solution 30% and 7.57 nm /% and 0.0026% for a 45% ethanol when using an optical system with a resolution of 0.02 nm.

We successfully designed and fabricated photonic sensors based on micro-resonant structure 1D made of porous silicon with two measurements: the liquid phase sensor method (with the organic solvent does not evaporate) and vapor sensor method (with volatile solvents - volatile organic compound-VOC) to determine the organic solvents with low concentrations