Synthesis and Study of Semiconductor Clusters of Uniform Size

该奖项是在材料化学和化学 支持合作研究的加工倡议 Schrock，Cohen和Silbey教授的演讲联合供资 由化学和材料部提供 research.本研究的主旨是综合与研究 大小一致的半导体团簇。这些集群是 预期具有明显不同于相同的特性 散装材料。 开环易位聚合的良好表征 钼催化剂将用于制备嵌段共聚物 其形态由在一个或多个微球内的均匀尺寸的球体组成， 主体聚合物基质。 球形区域将包含主 共价连接到每个单体单元上的金属 地区 主体聚合物将是烃。块 共聚物膜将用硫化氢处理， 以在球体内产生均匀尺寸的簇。 光学 将使用理论光谱采集和评估 技术. 的硒化物、碲化物、磷化物和砷化物 各种主群元素应可使用 类似的方法。平均尺寸的硫化铅团簇 30埃的薄膜。

This award is made in the Materials Chemistry and Chemical Processing Initiative in support of the collaborative research of Professors Schrock, Cohen and Silbey at MIT. Joint funding is provided by the Divisions of Chemistry and Materials Research. The thrust of the research is the synthesis and study of semiconductor clusters of uniform size. These clusters are expected to have properties markedly different from the same bulk materials. Ring-opening metathesis polymerization by well-characterized molybdenum catalysts will be used to prepare block copolymers with morphologies consisting of uniform sized spheres within a host polymer matrix. The spherical regions will contain main group metals covalently attached to each monomeric unit in the region. The host polymer will be a hydrocarbon. Block copolymer films will be treated with hydrogen sulfide in order to generate uniform sized clusters within the spheres. Optical spectra will be acquired and evaluated using theoretical techniques. Selenides, tellurides, phosphides and arsenides of a variety of main group elements should be preparable using similar approaches. Lead sulfide clusters with an average size of 30 angstroms have been prepared in a polynorbornene film.