我們將利用掃描探針顯微技術研究苯胺、吡咯、噻吩等有機分子，在單結晶金電極上的吸附結構及其陽極化後所造成的電聚合現象，這些單分子可形成具有多重應用的有機導電高分子，我們試圖了解電聚合的反應過程及所製成分子的形狀及大小，高分子的特性如何受實驗條件的影響，例如電解液的酸鹼性、有機分子的濃度、電解液中陰離子的種類及化學特性、電極的種類及其原子結構等。由3-mercaptosulfonic acid(MPS)或bis(3-sulfopropyl)disulfide(SPS)分子及氯離子共同對銅還原造成的加速作用為本計畫的另一重點，我們將利用STM 顯像技術檢測 MPS 或SPS 分子在多種電極材料上有及無氯離子時的吸附狀況，及他們對銅離子的還原反應的影響，雖然目前已有許多這一方面的研究，但仍有許多未知的電化學過程需要研究，我們相信以本實驗室的專業背景，應可對此一研究有重大的貢獻，我們對銅沉積的過程及銅沉積物的結構應可達到原子層次的解析度因此可對此一過程有更深一層的認識。同時，具半導體特性的有機分子，例如五環素及類似的分子，他們在電極上的吸附狀態為研究的另一重點，這些有機分子的排列方式對他們的物理特性例如導電度具有重要的影響，我們希望透過探針顯微技術對這些有機分子的排列方式及堆積模式有明確的認知，這些訊息應有助於日後控制有機薄膜的特性。 We would employ in situ scanning tunneling microscope (STM) and atomic force microscope (AFM) to study the adsorption of aniline, pyrrole, and thiophene molecules and their subsequent electropolymerization on well-defined single crystal electrodes of gold, copper, platinum, etc. The main goals of this study include revealing the relationship between adsorption of molecules and their subsequent coupling to produce molecules on electrode surfaces. We will examine experimental parameters controlling the conformations of these organic conducting polymers, hoping to learn the way to control the size and shape of these polymers. The synergistic effect exerted by 3-mercaptosulfonic acid and chloride on the electrodeposition of Cu would be examined. These two species are known to cause higher rate of Cu deposition, although the mechanism behind this effect is not clear. We will use high resolution STM imaging techniques to examine the adsorption of MPS molecules with and without chloride to unravel if MPS and chloride anions are coadsorbed on electrode surface. While most research has employed copper electrode, we would use platinum electrodes to compare with others, because we are more familiar with the characteristics of platinum. The adsorption of organic molecules such as pentacene, thienothiophene and N-substitutednaphthalene 1,4,5,8-tetracarboxylicdiimide (NTCDI) on gold electrodes would be examined also. These molecules are known to have potential applications as semiconducting thin film. The structure or arrangement of molecules in the adlayer could be important in determining the charge mobility in films fabricated from these organic molecules. We intend to obtain molecular resolution STM images to address how these molecules would be adsorbed on solid support and what interactions are involved in organizing molecules in this thin film. 研究期間：9908 ~ 10007
