Preparation and Application of Piezoelectric Crystal Detector Based on C60/Polymer Coatings

• Main Authors: Rouahlin You, 游若琳
• Other Authors: Jeng-Shong Shih
• Format: Others
• Language: zh-TW
• Published: 1999
• Online Access: http://ndltd.ncl.edu.tw/handle/82247324222151177999

碩士 === 國立臺灣師範大學 === 化學研究所 === 87 === Preparation and Application of Piezoelectric Crystal Detector Based on C60/Polymer Coatings Abstract The C60/polycinnamaldehyde ( C60/PCA ) and C60/polyphenylacetylene ( C60/PPA ) copolymers were synthesized by using the Friedel — Craft reaction and applized as the piezoelectric quartz crystal coating materials. A C60/polycinnamaldehyde (PCA) coated piezoelectric quartz crystal membrane sensor with a home — made computer interface was prepared and applied as a PZ protein sensor. The adsorption of protein such as hemoglobin onto the C60/PCA coated crystal resulted in the decrease of oscillating frequency. The variations of crystal frequency were converted to voltage with a frequency to voltage converter, and followed by amplification with OPA and data acquisition with analog to digital converter. It was found that hemoglobin had the best signal shift among the testing proteins. The PZ protein sensor exhibited good sensitivity of 6530 Hz / ( mg / mL ) and with detection limit of ppm level for hemoglobin. Furthermore, a C60/polyphenylacetylene (PPA) coated piezoelectric quartz crystal sensor with an Intell-8255 data processing system for various olefin vapors was also made. The aromatic hydrocarbons such as toluene seems to have greater adsorption onto C60/PPA membrane than alkynes, alkenes and alkanes. The absorption of ploycyclic aromatic hydrocarbons (PAHs) onto the C60/PPA membrane was also investigated. And we found that by using toluene as the solvent for PAHs, the C60/PPA membrane has a much larger frequency shift for naphthalene.