本論文主要研究表面電荷對離子型界面活性劑(SDS及CTAB)溶液中金奈米粒子穩定度及催化活性的影響。當金奈米粒子從CTAB溶液中轉回到SDS溶液時，要在溶液中加入有機添加劑以維持穩定度，但是金奈米棒可以直接的從CTAB溶液中轉移到SDS溶液不用加任何的添加劑。金奈米粒子從原先的SDS溶液轉移到CTAB時，對Anthracene氫化反應的催化活性會下降，但是將金奈米粒子從CTAB溶液再轉移回SDS溶液後，對Anthracene的催化活性又會上升。金奈米棒表面上修飾L-cysteine後因為L-cysteine在不同pH值下所帶的電荷不同，而會影響著金奈米棒的穩定性，從上述的結果中證實表面電荷金奈米粒子的穩定度及催化活性有很大的影響。 The purpose of this essay is to study the charge effects on the stabilities and catalytic activities of gold nanoparticles and nanorods in ionic surfactant solutions, including hexadecyltrimethylammonium bromide (CATB) and Dodecyl sulfate sodium salt (SDS). In order to maintain the stability of these nanoparticles and nanorods, the addition of the organic additives is necessary when the gold nanoparticles in the CTAB solution is transferred into the SDS solution, but not in the case of the gold nanorods. For the reactivity, the gold nanoparticles in the SDS solution are transferred into the CTAB solution, their catalytic activities in the hydrogenation of anthracene become suddenly weaker in the latter. But the gold nanoparticles in the CTAB solution was transferred into the SDS solution back, their highly catalytic activities appear again. The gold nanorods binding to l-cysteine will change the surface charge when changes in solution pH, influence on the stability of gold nanorods .These above results show that the surface charges of gold nanoparticles have the strong influence on their catalytic activities and stability.
