| Summary: | 碩士 === 國立交通大學 === 材料科學與工程系所 === 94 === This research is divided into three parts, the main purpose of the first part lies in studying the result of the gold nanoparticles after heat treatment and gold nanoparticles were reduced by NaBH4 in the presence of the alkanethiol and the thiol which containing the hydroxy functional group(pre-synthesis procedure), alkanethiol-stabilized gold nanoparticles were functionalized with the thiol which containing the hydroxy functional group(post-modified procedure). The heat-treatment make that the heat-induced size evolution of small gold nanoparticles in the solid state. The uniform growth of gold nanoparticles was observed when tetraoctylammonium bromide, which was used as a phase-transfer agent during the preparation of gold nanoparticles.
The uniform size of the pre-synthesis procedure is better than the post-modification procedure. Poly(fluorene-co-pyridine) copolymer were synthesized in the second part. The conjugacy of the copolymer was not destroyed by the pyridinyl unit, because pyridinyl unit that this experiment used was para-linkage. It produced red shift to UV-Vis and PL spectra when increasd in content of pyridinyl unit. The third part, we made the conjugate
polymer that contains 5 mol% pyridinyl unit hybrid with gold nanoparticles which post-modification procrdure. The joining of the gold nanoparticles has not produced too much change in UV-Vis and PL spectra. Double-layer LED device with an ITO/PEDOT/polymer/Ca /Al configuration were fabricated by using those nanocomposites. The maximum luminance of PFPy5-1 wt% Au was four times as large as that of a similar light emitting diode incorporating pure PFPy5 (2599 vs. 635 cd/m2).
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