Construction Method for Super Lattice Structure by Electreochemical Atomic Layer Epitaxy

1. 为了明确电化学原子层外延（ECACE）的机理和ECACE层的特性，采用电化学瞬态法和二次谐波生成方法在Au（111）或Au（100）电极上电沉积Pd。采用光辅助电沉积法在Si（111）上外延生长CdTe。采用原位原子力显微镜对Au、Pt、Pd等金属的电化学生长进行了监测。Cd的ECALE是通过Cd和S交替生长来实现的。然后用偏振光在饱和氧水中照射使其溶解，形成条形结构。通过将Au或ITO衬底交替浸入含有金纳米团簇的溶液中，这些金纳米团簇由具有甲基、羧酸盐或铁离子末端基团的硫醇SAMs和电解液保护，可以构建多层电活性金纳米团簇。同样，利用反胶束技术制备了多层CdS纳米团簇。在这两种情况下，多层膜中的所有纳米团簇都具有电活性。实现了多核金属配合物的电化学分子外延。

1. To clarify the mechanism of electrochemical atomic layer epitaxy (ECACE) and the characteristics of the ECALE layer, electrodeposition of Pd on Au(111) or Au(100) electrode was followed by electrochemical transient method and second harmonic generation.2. CdTe was epitaxially grown on Si(111) by photoassisted-electrodeposition.3. Electrochemical growths of metals such as Au, Pt and Pd, were monitored by in situ atomic force microscopy.4. ECALE of CdS was achieved by growing Cd and S alternately. It was then dissolved by irradiation of polarized light in oxygen-safurated water to form a stripe structure.5. By dipping Au or ITO substrate into solutions containing Gold nanoclusters protected by thiol SAMs with methyl, carboxylate, or ferrocen terminal group, and polelectrolytes alternately, multi-layers of electroactive gold nanoclusters were constructed. Similarly, multi-layers of CdS nanoclusters prepared by reversed-micelle technique were constructed. In both cases, all nanoclusters in the multilayers were electroactive.6. Electrochemical molecular epitaxy of multi-nuclear metal complex was achieved.