Assembly and spectroscopic interrogation of large atomic and molecular clusters in helium droplets

氦液滴中大原子和分子簇的组装和光谱询问

• 批准号: 0809093
• 负责人: Andrey Vilesov
• 金额: $ 46.66万
• 依托单位: University of Southern California
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-08-15 至 2011-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0809093&HistoricalAwards=false
• 关键词: Assembly; spectroscopic; interrogation; large; atomic

In this award, funded by the Experimental Physical Chemistry Program of the Division of Chemistry, Professor Andrey Vilesov of the University of Southern California, together with his graduate student researchers, will study the aggregation of atomic and molecular species in ultracold, superfluid helium droplets. Species to be studied include metal atoms, methane, water, ammonia, hydrogen chloride and parahydrogen clusters, among others. Cluster sizes span the range from a few atoms/molecules to tens of millions of solute species. The goal of these studies is to investigate how molecules interact with each other and with this rather unusual solvent over a wide range of size. The experiments will be carried out in the gas phase with mass spectrometric and laser spectroscopic methods. The ultimate aim of research like this is to learn about new ways in which matter can interact in a highly unusual environment. The large clusters to be studied in this work are intermediate between molecular and bulk (mesoscale) and are predicted to have unusual properties. The very large helium droplets that Vilesov proposes studying may be useful vehicles for making interesting kinds of new materials. Students working with Prof. Vilesov will receive excellent training in a number of areas of high-technology -- including lasers, vacuum science and electronics. Prof. Vilesov has a strong history of international collaboration, and this will likely continue with this work.

在这个由化学系实验物理化学项目资助的奖项中，南加州大学的Andrey Vilesov教授和他的研究生研究人员将研究超冷、超流氦液滴中原子和分子物种的聚集。 待研究的物种包括金属原子、甲烷、水、氨、氯化氢和仲氢团簇等。 团簇大小的范围从几个原子/分子到数千万的溶质种类。 这些研究的目的是研究分子如何相互作用，以及在很大的尺寸范围内与这种相当不寻常的溶剂相互作用。 实验将在气相中用质谱和激光光谱法进行。像这样的研究的最终目的是了解物质在一个非常不寻常的环境中相互作用的新方式。 在这项工作中要研究的大集群是分子和散装（中尺度）之间的中间体，并预测有不寻常的性能。 Vilesov提议研究的非常大的氦液滴可能是制造有趣的新材料的有用工具。 与Vilesov教授一起工作的学生将在许多高科技领域接受出色的培训-包括激光，真空科学和电子学。 Vilesov教授有很强的国际合作历史，这可能会继续这项工作。