金及銀奈米粒子交替排列於單層雙塊式高分子PS-b-P4VP 形成六方最密堆積排列之薄膜

Abstract

摘要 本篇論文主要探討金屬膠體奈米粒子(metal colloidal nanoparticles)混入雙塊式高分子(diblock copolymer)之micelle結構，研究分為兩部分，第一部份為運用一相法合成TOP-Au NPs (trioctylphosphine protected Au nano- particles)及TOP-Ag NPs (trioctylphosphine protected Ag nanoparticles)，並利用pyridine-ligand置換TOP-ligand合成出Py-Ag NPs (pyridine protected Ag nanoparticles)，經統計出TOP-Au、TOP-Ag及Py-Ag NPs之粒徑標準差分別為0.14、0.23及0.27 nm，平均粒徑則為2.08、2.26及2.34 nm，發現三種奈米粒子其粒徑分布極為狹窄。第二部分為將TOP-Au及Py-Ag NPs分別混入PS-block-P4VP之PS corona及P4VP core中(ex-situ法)，並藉由TEM及同步輻射光源之GI-SAXS來印證分析。

Abstract Silver and gold nanoparticles (NPs) are sequestered concomitantly into the poly(4-vinylpyridine) (P4VP) and polystyrene (PS) blocks, respectively, of a highly asymmetric PS-block-P4VP monolayer micelle, forming a twodimensional hierarchical arrangement, as evidenced using transmission electron microscopy and synchrotron grazing-incidence small-angle X-ray scattering. This arrangement is constituted by (i) pyridine-ligated Ag NPs sequestered in P4VP micelle cores with hexagonal packing (lattice constant >200 nm) and (ii) a PS matrix containing trioctylphosphine-passivated Au NPs with homogeneous ordering.