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The Synthesis and Distribution of Carbon Nanostructures in the Interstellar Medium

碳纳米结构的合成及其在星际介质中的分布

基本信息

批准号：
2137919
负责人：
Jacob Bernal
金额：
$ 30万
依托单位：
Bernal, Jacob J
依托单位国家：
美国
项目类别：
Fellowship Award
财政年份：
2021
资助国家：
美国
起止时间：
2021-09-01 至 2024-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2137919&HistoricalAwards=false
关键词：
Synthesis Distribution Carbon Nanostructures Interstellar

项目摘要

Jacob J Bernal is awarded a Mathematical and Physical Sciences Ascending Postdoctoral Research Fellowships (MPS-Ascend) to conduct a program of research and education at the University of Arizona. He will explore the synthesis and interstellar presence of carbon nanostructures (such as fullerenes and nanotubes) from shock heating of silicon carbide (SiC) circumstellar dust grains. The astronomical detection of fullerenes transformed our understanding of chemical complexity in the Interstellar Medium (ISM). Dr. Bernal is working to overcome the perception that education has historically been used as a tool of assimilation and control of Native Americans, resulting in a lasting negative perception and distrust of higher learning institutions. Recent findings, published by Bernal and collaborators, revealed that shock heating of SiC grains produced carbon nanobuds, which can subsequently close to form fullerenes. The findings also point to formation of carbon nanotubes, if SiC molecules are heated to higher temperatures and longer heating durations. These nanostructures would become the largest known molecules in the ISM, consisting entirely of reduced carbon, and destruction of these nanotubes may account for the presence of previously detected complex organic molecules. This could have implications for studies of meteoritic materials and astrobiology. He will build awareness of astronomical observatory facilities on the Tohono O’odham Nation and demonstrate that STEM careers are attainable while remaining in the supportive local community structure of the Tribe.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

雅各布·J·伯纳尔被授予数学和物理科学提升博士后研究奖学金(MPS-Ascend)，以在亚利桑那大学开展研究和教育项目。他将通过冲击加热碳化硅(碳化硅)星际尘埃颗粒来探索碳纳米结构(如富勒烯和纳米管)的合成和星际存在。对富勒烯的天文探测改变了我们对星际介质(ISM)化学复杂性的理解。伯纳尔博士正在努力克服这样一种看法，即教育历来被用作同化和控制美洲原住民的工具，导致人们对高等教育机构持久的负面看法和不信任。伯纳尔及其合作者最近发表的研究结果显示，冲击加热碳化硅颗粒会产生碳纳米芽，然后碳纳米芽可以接近形成富勒烯。这些发现还指出，如果将碳化硅分子加热到更高的温度和更长的加热时间，就会形成碳纳米管。这些纳米结构将成为ISM中已知的最大分子，完全由还原的碳组成，这些纳米管的破坏可能解释了以前检测到的复杂有机分子的存在。这可能会对陨石材料和天体生物学的研究产生影响。他将在Tohono O‘odham Nation上建立对天文观测站设施的认识，并证明STEM的职业生涯是可以实现的，同时留在部落的支持性当地社区结构中。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。