Construction Method for Super Lattice Structure by Electreochemical Atomic Layer Epitaxy

1.为了阐明电化学原子层外延(ECACE)的机理和ECALE层的特性，用电化学瞬变法和二次谐波发生法研究了Pd在Au(111)和Au(100)电极上的电沉积过程。采用光助电沉积法在Si(111)衬底上外延生长了CdTe。利用原位原子力显微镜对金、铂、钯等金属的电化学生长进行了监测。通过交替种植Cd和S实现了Cd的ECALE。然后用偏振光照射在氧气安全的水中溶解，形成条状结构。通过交替地将Au或ITO衬底浸入含有硫醇保护的金纳米团簇的溶液中，自组装膜具有甲基、羧酸盐或二茂铁端基，并与极电解液交替作用，构建了多层电活性金纳米团簇。同样，用反胶束技术制备了多层的硫化镉纳米团簇。在这两种情况下，多层膜中的所有纳米团簇都是电活性的。实现了多核金属络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.