Synthesis and Study of Semiconductor Clusters of Uniform Size

9312413 Schrock此更新奖项是在先进材料和加工计划，以支持教授Schrock，科恩和Silbey在马萨诸塞州理工学院的合作研究。由化学和材料研究部门提供支持。研究的重点是合成形状、尺寸和分布不寻常的铅和镉硫化物半导体团簇。该方法将是合成具有特定形态的含金属羧酸盐的嵌段共聚物，并通过用硫化氢处理将其转化为金属硫化物簇。新的含金属单体和催化剂将被合成用于开发新的聚合物前体聚合物。更一般的半导体簇合成方法，包括水的方法将被探索。配合实验，将发展理论方法的应用，以研究半导体微晶的光吸收、荧光和光电子光谱随其尺寸、形状和表面的变化。 仔细控制半导体团簇的大小和形状将允许合成具有可预测和可控的电子和光学特性的先进材料。 ***

9312413 Schrock This renewal award is made in the Advanced Materials and Processing Program in support of the collaborative research of Professors Schrock, Cohen and Silbey at the Massachusetts Institute of Technology. Support is provided by The Divisions of Chemistry and Materials Research. The focus of the research is the synthesis of semiconductor clusters of lead and cadmium sulfides of unusual shape, size and distribution. The approach will be to synthesize metal carboxylate-containing block copolymers of a particular morphology and convert them into metal sulfide clusters by treatment with hydrogen sulfide. New metal-containing monomers and catalysts will be synthesized for the development of new semiconductor-precursor polymers. More general approaches to semiconductor cluster synthesis including aqueous methods will be explored. In concert with experiments, the application of theoretical methods to study the optical absorption, fluoresence and photoelectron spectra of semiconductor crystallites as a function of their size, shape and surface, will be developed. %%% Careful control of the size and shape of semiconductor clusters will permit the synthesis of advanced materials with predictable and controllable electronic and optical properties. ***