Metal Colloids and Thin Films

发展中国家科学奖将支持堪萨斯州立大学的Kenneth KLabunde和智利概念大学的Galo Cardenas-Trivino的合作。该项目的目标是(1)以铜、银、锡以及苯乙烯和甲基丙烯酸甲酯等单体制备M-溶剂胶体：(2)用电泳法、透射电子显微镜、扫描电子显微镜、傅立叶变换红外光谱、穆斯堡尔谱和SRS对胶体粒子进行表征；(3)用热重分析、差示扫描量热仪、显微分析和电阻率测量等手段对胶体形成的金属膜进行了表征。研究人员将使用一种新的方法来制备非水胶体金属颗粒，方法是使用金属蒸发和原子在过冷的有机溶剂中的溶剂化。移动的金属原子在变暖时聚集在一起。由于溶剂化和静电斥力，形成的颗粒停止生长。各种金属已被证明能形成稳定的胶体溶液。对这些新胶体的主要兴趣在于它们作为金属膜前驱体的用途。研究人员的目标是开发用于化学液体(而不是气相)沉积薄膜的它们。随着最近的一项专利，许多工业兴趣已经发展起来。这一联合项目预计将促进金属胶体、金属薄膜工作的进展。美方在胶体化学方面拥有专业知识，并拥有制备和分析胶体溶液和金属薄膜的最先进设备。智利方面拥有聚合物表征方面的专业知识，以及必要的热重分析、差示扫描量热分析和透射电子显微镜/扫描电子显微镜设施，这是美方所缺乏的。

This Science in Developing Countries award will support the collaboration of Kenneth Klabunde of Kansas State University and Galo Cardenas- Trivino of the University of Conception, Chile. The project aims to (1) prepare M-solvent colloids with Cu, Ag, and Sn, and with monomers such as styrene and methylmethacrylate; (2) characterize colloidal particles by electrophoresis, TEM, SEM, FTIR, Mossbauer, and SRS; and (3) characterize metallic films formed from the colloids by TGA, DSC, microanalyses, and resistivity measurements. The researchers will use a new method for preparing nonaqueous colloidal metal particles, using metal evaporation and solvation of atoms in excess cold organic solvents. The mobile metal atoms cluster upon warming. The forming particles stop growing due to solvation and electrostatic repulsion. Various metals have been shown to form stable colloidal solutions. The major interest in these new colloids is in their use as metallic film precursors. The researchers aim to develop them for chemical liquid (rather than vapor) deposition of films. With a recent patent, much industrial interest has developed. This joint project is expected to facilitate progress in metal- colloid, metal film work. The U.S. side has expertise in colloid chemistry and state-of-the-art equipment for preparing and analyzing colloidal solutions and metal films. The Chilean side has expertise in polymer characterization and necessary TGA, DSC, and TEM/SEM facilities, which the U.S. side lacks.