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URN etd-0825110-014817 Statistics This thesis had been viewed 2428 times. Download 977 times. Author Chang-Hua Zhong Author's Email Address No Public. Department Electro-Optical Engineering Year 2009 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 98 Title The study of SPR optical fiber - 200 μm sensors based on Au thin-film selected deposition for sodium hypochlorite(NaOCl) concentration measurement Keyword NaOCl selected deposition SPR fiber sensor SPR fiber sensor selected deposition NaOCl Abstract The phenomenon of surface plasmon resonance (SPR) is widely applied in the biological and chemical sensing for characterizing and quantifying biomolecular interactions. The advantages of SPR detective method have high sensitive response, kinetic study in real-time, and label-free for biological sensing. Optical fiber sensor has the characteristics of small, low cost, and the same scheme on SPR detecting. In this thesis, we combine the advantages of optical fibers and SPR sensors, a special multi-mode optical fiber with the core diameter of 200 μm being used in the measurement and the method of selective gold deposition on the fiber’s side-polished surface being applied in the sensor’s fabrication processes, in order to enhance the detection sensitivity of the SPR fiber sensors.
A novel selective gold deposition method we proposed with a white light (halogens light) source for the SPR detecting is introduced in the analysis, the measurement output signals being delivered to the optical spectrum analyzer (OSA) and the computer to carry out the data analysis. The experiment results show that the selected gold film deposition on the side-polished surface of the fibers with core-200 ?m can enhance and improve the measurement sensitivity and SPR effect, with 55.85% improvement in the SPR effect and 10.43% enhancement in the detection sensitivity comparing with the results of conventional multi-mode fibers, for the concentration detecting of the sodium hypochlorite solutions with the concentration ranged from 1% to 6%. Besides, several selective gold deposition patterns are designed in this thesis for the investigation of SPR detection sensitivities.
Advisor Committee Woo-Hu Tsai - advisor
Files Date of Defense 2010-07-27 Date of Submission 2010-08-26