本研究利用空氣/HAuCl4溶液之界面上的硬脂胺單分子層為模板，以形成二維的金奈米粒子陣列。單分子層模板先與液相中的金前驅物（AuCl4－）結合，並利用Langmuir-Blodgett（LB）沈積方式將單分子層轉移至固體基板上形成LB膜，再藉由紫外光還原LB膜中的金前驅物，使形成金奈米粒子陣列。首先利用氣液界面上單分子層等溫線行為的分析，探討做為模板之單分子層的特性，然後利用原子力顯微鏡及穿透式電子顯微鏡分析技術，了解影響LB膜中金奈米粒子形成的因素。實驗結果顯示藉由改變液相中HAuCl4的濃度，可以控制金前驅物在氣液界面上之硬脂胺單分子層模板上的吸附行為。此外，透過原子力顯微鏡及穿透式電子顯微鏡的分析，可發現隨著吸附在氣液界面上單分子層模板之金前驅物密度的改變，在經過紫外光還原後，LB膜的表面形態可以從金奈米粒子層變成金奈米薄膜層。因此透過單分子層吸附金前驅物數量的控制，可達到控制基板表面上金奈米粒子層形態的目的。然而，在相同的液相HAuCl4濃度下，由已吸附金前驅物之單分子層模板所形成的LB膜，隨著紫外光還原時間的改變，基板上金奈米粒子的分布及大小也會受到影響。當還原時間越長時，生成的粒子越大且分布較不均勻。因此，也可以利用紫外光照射時間的調整，控制基板上生成之金粒子的大小及分布。

　Two-dimensional gold nanoparticle array was fabricated in this study by using an octadecylamine monolayer at the interface of air/HAuCl4 solution as the template. The monolayer template was associated with the gold precursor AuCl4- in the subphase, and then was transferred onto a solid substrate to form a Langmuir-Blodgett (LB) film by the LB deposition technique. A gold nanoparticle array was thus formed from the LB film by UV reduction. Characteristics of the monolayer template were studied from its isotherm behavior at the interface. The factors affecting the formation of gold nanoparticles in the LB film were then elucidated by the atomic force microscopy (AFM) and transmission electron microscopy (TEM) analysis. The results demonstrated that by changing the HAuCl4 concentration in the subphase, one could control the adsorption behavior of the gold precursor onto an octadecylamine monolayer template. Moreover, from the AFM and TEM analysis, it was found that the LB film morphology after UV reduction could change from gold nanoparticle layer to gold nano-thin film, depending on the adsorbed density of the precursor on the monolayer template. As a result, by controlling the adsorption amount of gold precursor on the monolayer, one can reach the goal of manipulating the morphology of a gold nanoparticle layer on the substrate. However, with the same HAuCl4 concentration in the subphase, the distribution and size of gold nanoparticles formed in the LB film of precursor/monolayer template were affected by UV reduction time. The longer the photoreduction time is, the larger and more inhomogeneous the nanoparticles are. One can thus control the morphology of a gold nanoparticle array by adjusting the UV irradiation time.

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