本研究以TOPO作為界面活性劑，Fe(CO)5為前驅物，用熱裂解法合成氧化鐵奈米粒子，並藉由TEM、XRD及SQUID來鑑定粒子的大小、結構及磁特性。以加熱包系統合成的氧化鐵奈米粒子的粒徑較高溫爐系統的粒子小，磁化量也較低。此外，沒有通氬氣所合成的粒子，也會造成粒徑的上升及磁化量的降低。
藉由觀察不同系統的氧化鐵奈米粒子/團聯共聚物PS-P2VP複合物的形態，可看出粒子磁性大小的影響。由於氧化鐵粒子表面披覆TOPO，因此選擇性進入P2VP的區塊。然而，隨著粒子濃度的增加，由於磁性粒子間的磁性作用力，粒子聚集的現象也漸趨嚴重，這也造成複合物變為不規則的形態。導致複合物規則-不規則形態轉變的臨界粒子濃度，會隨著粒徑及磁化量的降低而增加。
以氧化鐵奈米粒子作為晶種可合成出氧化鐵-金核殼奈米粒子，藉由改變金前驅物的濃度可控制粒子的金殼層厚度。此外，氧化鐵-金核殼粒子之金殼層厚度對於其UV-Vis光譜有相當大的影響。

Fe3O4 nanoparticles were prepared by thermolysis using TOPO as a surfactant and Fe(CO)5 as a precursor. Transmission electron microscopy, X-ray diffraction and superconducting quantum interference device were employed to characterize the size, structure and magnetic properties of these particles. It was obtained that Fe3O4 nanoparticles synthesized by heating mantle system exhibited smaller size and lower magnetization than those by oven system. In addition, the synthesis of particles without argon flow caused the increasing particle size and decreasing magnetization.
The effect of the magnetic properties of nanoparticles on the phase behavior of polymer nanocomposite composed of as prepared Fe3O4 particles and polystyrene-b-poly(2-vinylpyridine) (PS-P2VP) diblock copolymer was studied. Because Fe3O4 nanoparticles were modified with TOPO, particles prefer to locate in the P2VP domains. However, the aggregation of nanoparticles occurred with increasing particle concentration due to the strong magnetic interaction between particles. This caused the disordering of composite. The critical particle concentration to induce the order-disorder transition of composite increases with decreasing particle size and magnetism.
Fe3O4-Au core-shell nanoparticles were prepared using Fe3O4 as seeds. The thickness of Au shell can be manipulated by varying the concentration of Au precursor. The UV-Vis spectra of these core-shell particles showed a strong function of the Au shell thickness.

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