The Stability of Colloidal Metallic Nanoparticles in Reactive Chemical Environments

过渡金属纳米粒子的合成和表征是这一研究项目的重点，该项目是由佐治亚理工学院的S·赛义德和王及其同事共同完成的。在分析和表面化学计划的支持下，研究了过渡金属纳米晶体的结构、形成机理、热稳定性和光热稳定性。利用电子显微镜和光谱探针研究了控制和影响这些纳米晶体生长形态的方法。考察了纳米粒子的稳定性与金属类型、粒子形状、封端配体的类型以及化学环境的性质的关系。这些研究结果将有助于评估纳米颗粒材料在多相催化应用中的应用。金属纳米粒子在多相催化中具有广阔的应用前景。对这些材料的生长、尺寸和形状的控制以及稳定性的合理认识是分析和表面化学计划支持的这一研究项目的重点。佐治亚理工学院的El-Sayed教授和Wang教授及其同事正在结合这些重要材料的合成、光谱表征和电子显微镜表征来获得这一理解。

AbstractCHE-0240380El-Sayed/Georgia TechThe synthesis and characterization of transition metal nano-particles is the focus of this research project, being carried out at the Georgia Institute of Technology by co-P.I.'s El-Sayed and Wang and their coworkers. With the support of the Analytical and Surface Chemistry Program, the structure, formation mechanism, and thermal and photothermal stability of tranisition metal nanocrystals are being examined. Methods for controlling and affecting the growth morphology of these nanocrystals are examined using electron microscopy and spectroscopic probes. The dependence of the nanoparticle stability on the type of metal, the shape of the particle, the type of the capping ligand, and the nature of the chemical environment is examined. The results of these studies will be useful in evaluating nanoparticle materials for use in heterogeneous catalysis applications. Metal nanoparticles show great promise for applications in heterogeneous catalysis. The rational understanding of the growth, the control of size and shape, and understanding the stability of these materials is the focus of this research project supported by the Analytical and Surface Chemistry Program. Professors El-Sayed and Wang and their coworkers at Georgia Tech are combining synthesis, spectroscopic characterization, and electron microscopic characterization of these important materials to gain this understanding.