Controlling reactions, alignment, and deposition of cold molecules by external electric fields with the use of superfluid helium nanodroplets

使用超流氦纳米液滴通过外部电场控制冷分子的反应、排列和沉积

• 批准号: 1213410
• 负责人: Vitaly Kresin
• 金额: $ 43.1万
• 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: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2017-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1213410&HistoricalAwards=false
• 关键词: Controlling; reactions; alignment; deposition; cold

In this project, funded by the Chemical Structure, Dynamics, and Mechanisms Program of the Division of Chemistry, Prof. Vitaly Kresin's group from the University of Southern California will introduce an approach for manipulating the orientation, reactions, self-assembly, and surface deposition of very cold polar molecules by the application of an external field. This will be achieved by embedding the molecules into superfluid helium nanodroplets in a beam. The droplets cool the molecules to sub-Kelvin temperatures without impeding their ability to migrate and rotate freely. An externally imposed electric field will produce nearly complete molecular alignment. This novel route to explore and control quantum phenomena will be applied to the following areas: (i) Steering the outcome of molecular reactions and assembly via imposing a mutual orientation on the reactants; (ii) Nanodroplet size selection via electrostatic deflection of droplets doped with polar molecules. (iii) Soft-landing of aligned polar molecules via application of a directed electric field near a substrate. In terms of broader impacts, quantum-level control of cold and ultracold polar molecule assembly, interactions and reactions has attracted significant interdisciplinary interest in view of their potential value for quantum computing, novel condensate phases, molecular interferometry, and investigations of fundamental symmetries. Potential applications of the deposition technique include production of oriented films and arrays, enhanced optical sensing, etc. On the human resources side, the project will offer graduate students excellent training in a wide range of experimental and theoretical aspects of an inherently interdisciplinary field. Postdoctoral researchers will receive professional mentoring. Commitment to teaching and outreach includes ongoing active undergraduate student involvement in research, as well as contributions to programs and workshops for undergraduate, elementary-school, and high-school students.

在该项目中，由化学划分的化学结构，动力学和机制计划资助，来自南加州大学的Vitaly Kresin教授将通过应用外部场的应用来操纵非常冷的极性分子的方向，反应，自我组装和表面地表。 这将通过将分子嵌入到梁中的超氟氦纳米环中来实现。 液滴将分子冷却至亚乳杆菌温度，而不会阻碍其自由迁移和旋转的能力。 外部施加的电场将几乎产生完整的分子比对。 这项探索和控制量子现象的新型途径将应用于以下区域：（i）通过对反应物施加相互取向来指导分子反应的结果和组装； （ii）通过掺杂极性分子的液滴的静电挠度选择纳米光尺寸。 （iii）通过在基板附近的定向电场应用对齐的极性分子的软接地。在更广泛的影响方面，量子水平的控制冷和超速极性分子组装，相互作用和反应引起了巨大的跨学科兴趣，因为它们在量子计算，新型冷凝液相，分子干涉测量和研究基本符号的研究中的潜在价值。沉积技术的潜在应用包括生产定向的膜和阵列，增强的光学感测等。在人力资源方面，该项目将为研究生提供良好的培训，以在固有的跨学科领域的广泛实验性和理论方面提供出色的培训。 博士后研究人员将获得专业指导。 对教学和外展的承诺包括持续的积极的本科生参与研究，以及对本科，小学和高中生的课程和讲习班的贡献。