Preparation Multi-Hotspot of Poly(Amic Acid) / Zinc Oxide Core-Shell Particles and Investigation Surface-Enhanced Raman Scattering

• Main Authors: Guan-Ting Li, 李冠霆
• Other Authors: Keh-Ying Hsu
• Format: Others
• Language: zh-TW
• Published: 2015
• Online Access: http://ndltd.ncl.edu.tw/handle/mebsve

碩士 === 中原大學 === 化學工程研究所 === 103 === Poly(amic acid) particles were prepared by using precipitation polymerization, Pyromellitic dianhydride(PMDA) and 4,4’-Oxydianiline(ODA) as its monomers. Zinc oxide were prepared by sol-gel route using as a precursor, alcohol as a solvent. Under room temperature, Poly (amic acid)/zinc oxide core-shell composite particles were obtained via heterocoagulation method by reacting these two above products. The reaction conditions were changed, such as changing the solid content of monomer, medium and reaction time , the effects on the sizes of the particles and surface morphology were investigated. From the above experiments, the optimal conditions were chosen. SEM and TEM were used to observed the shape, size and homogeneity of the particles. Through XRD and FTIR, the successful of Poly (amic acid)/zinc oxide core-shell composite particles could be determined. Various amount of dye(rhodamine 6G) dropped on the prepared composite particles, the signal of Rh6G by Raman instrument was enhanced. Enhanced signal amplitude is proportional to the concentration of the dye.