RUI: Response of Single- and Multi-Walled Fullerenes and Endohedral Fullerenes to Photons and Charged Particles

RUI：单壁和多壁富勒烯和内嵌富勒烯对光子和带电粒子的响应

• 批准号: 1100537
• 负责人: HIMADRI CHAKRABORTY
• 金额: $ 17.1万
• 依托单位: Northwest Missouri State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1100537&HistoricalAwards=false
• 关键词: RUI; Response; Single; Multi; Walled

The encapsulation of an atom or an atomic cluster, or even a smaller fullerene in a fullerene cage offers a unique natural laboratory in which to examine the behavior of the guest system in confinement. Studies of these endofullerenes can not only lead to intriguing effects at the atomic scale but also can probe subtleties of quantum effects in the nanometer region. The endo-fullerenes also hold the promise of exciting applications in areas including, quantum computations, superconductivity, biomedical fields, drug delivery research, magnetic resonance imaging, and organic photovoltaic devices. Further, the discovery of endo-fullerenes in extraterrestrial environments indicates their astrophysical relevance. Hence, understanding the influence of the confining cage on the spectroscopy of the confined species and vice versa, are matters of great scientific interest. A theoretical study of the response of these compounds to the external electromagnetic and charged particle fields will be performed in the current research. By employing this, the roles of (i) the collectivized plasmonic motion of electrons, (ii) the dopant-fullerene hybridization, and (iii) the oscillations due to multipath interferences between electrons liberated from various sites of the compound will be investigated. Spectroscopy of fullerenes and endo-fullerenes by fast, bare ion impact will also be considered to determine in detail the effects of dipole and non-dipole collective motions, and the interference between various multipole channels. Furthermore, calculations of the electron capture by positron impact on fullerenes and endo-fullerenes, forming positroniums, will be undertaken.

原子或原子簇的封装，甚至在富勒烯笼中的较小的富勒烯提供了独特的天然实验室，可以在其中检查来宾系统的行为。对这些内氟烯的研究不仅可以在原子量表上产生有趣的作用，而且可以探测纳米仪区域中量子效应的微妙之处。内部富勒也有希望在包括量子计算，超导性，生物医学领域，药物输送研究，磁共振成像和有机光伏设备在内的区域中进行令人兴奋的应用。 此外，在外星环境中发现内fullerenes表明它们的天体物理相关性。因此，了解笼笼对被关闭物种的光谱的影响，反之亦然，这是极大的科学意义的问题。这些化合物对外部电磁和带电粒子场的反应的理论研究将在当前研究中进行。通过使用这种情况，（i）电子的等离激元运动的作用，（ii）掺杂剂 - 富勒烯杂交以及（iii）（iii）由于电子从化合物的各个位点释放的电子干扰引起的振荡将被研究。还将考虑通过快速的裸离子撞击对富勒烯和填充子的光谱详细确定偶极子和非偶极子集体运动的影响，以及各种多极通道之间的干扰。此外，将进行对富勒烯和富富勒烯的电子捕获对电子捕获的计算，形成正电子。