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The defense date of the thesis is 2016-09-14
The current date is 2019-02-18
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URN etd-0914116-153934 Statistics This thesis had been viewed 374 times. Download 0 times. Author Chung-chieh Chen Author's Email Address No Public. Department Materials Engineering Year 2015 Semester 2 Degree Master Type of Document Master's Thesis Language zh-TW.Big5 Chinese Page Count 74 Title Impedance of nano silver-containing films obtained by plasma deposition, graft polymerization, immobilization and humidity sensor application Keyword nano silver plasma deposition graft polymerization graft polymerization plasma deposition nano silver Abstract This study design a quickly and easily sensor, the modified base to explore whether the use of a sensor platform as the future use. Surface modification using plasma deposition, surface graft polymerization and immobilization to prepare nano silver-containing polymeric conductive films. With Al2O3 ceramic as substrate, hexamethyldisilazane (HMDSZ) monomer was used to deposit on the substrate to produce an active organic surface film. This surface film is hydrophobic in essence and contains active radicals, which are beneficial for the subsequent graft polymerization. Acrylic acid (AAc) in 8 wt% was grafted by UV light to the HMDSZ-deposited surface film, followed by reduction reaction of sodium borohydride (NaBH4) to immobilize different concentration of nano silver particles on the surface to produce silver-immobilized polymeric conductive film. The impedance change was measured by using the impedance sensor. The experimental results showed that the impedance of the silver-containing conductive film is decreased with their values ranged from 78.8 Ω to 30.5 MΩ. For the films containing no nano silver particles, their impedance values are over 109 Ω. The FTIR results revealed the functional group of AAc at 1650 cm-1 and 1725 cm-1. From the observation of SEM on the surface of the sample after the immobilization treatment, silver nanoparticles can be found to attach on the polymeric conductive film surface. The sense initial experiments found that the best is 30% AgNO3, the impedance ratio is about 0.59. Advisor Committee Hsin-ming Wu - advisor
Files Date of Defense 2016-07-07 Date of Submission 2016-09-14