Climate Change Data Portal
| INTEGRATING REMOTE SENSING OBSERVATIONS WITH NASA'S GEOS-5 MODELING FRAMEWORK IN SUPPORT OF RETROSPECTIVE ANALYSES AND SEASONAL PREDICTION OF BIOSPHERE-ATMOSPHERE CO2 FLUX | |
| 项目编号 | 80NSSC17K0348 P00001 |
| GEORGE HURTT | |
| 开始日期 | 2017-08-02 |
| 结束日期 | 2020-08-01 |
| 英文摘要 | Non-thermal dusty plasmas are complex, non-equilibrium systems in which nanometer-sized particles of condensed phases interact with electrons, ions, and neutral species of disparate temperatures (i.e. electrons are significantly hotter than the other species). These systems exist both undesirably, as in the case of chemical vapor deposition (CVD) processes where dust particles are a source of contamination, and for technological purposes to produce nanoparticles for a wide range of emerging applications. An important but relatively unexamined feature of nanoparticle-laden, non-thermal dusty plasmas is that the temperatures of nanoparticles are size dependent, and converge to neither the neutral gas nor electron temperatures. Ultimately, it is the temperature of a nanoparticle which determines whether it is stable or will evaporate, as well its crystallinity; thus, thermal energy transfer is a critical issue for both dust particle mitigation and controlled nanoparticle synthesis. Previous experiments have studied plasmas where nanoparticles are spatiotemporally nucleating and growing from a vapor precursor which makes it difficult to reveal size-dependent behavior. This proposed research is focused on controlled experiments based on the introduction of pre-made, size-focused nanoparticles into a plasma of well-defined residence time, combined with on line measurements of the extent of evaporation, crystallization, and surface growth, which will uniquely determine the nanoparticle temperature in the plasma. Further, as the energy balance for a nanoparticle in a plasma is influenced by particle-ion, particle-electron, and particle-neutral collisions, measurements will provide key insights into collision rates for nanoparticles in atmospheric pressure plasmas, which occur in an intermediate regime of collisionality. The results of the proposed experiments will not only lead to improved understand of dusty plasma systems, but will also have important consequences in the application of plasmas in materials processing. An understanding of thermal energy transfer to particles in plasmas will enable improved design of plasma reactors used in chemical vapor deposition, as well as nanocrystal synthesis. In addition, the proposed research is highly interdisciplinary, combining state-of-the-art aerosol measurements with atmospheric pressure plasma diagnostics to investigate dusty plasma behavior. |
| 学科分类 | 1107 - 航空航天工程;11 - 工程与技术 |
| 资助机构 | US-NASA |
| 国家 | US |
| 语种 | 英语 |
| 文献类型 | 项目 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/73451 |
| 推荐引用方式 GB/T 7714 | GEORGE HURTT.INTEGRATING REMOTE SENSING OBSERVATIONS WITH NASA'S GEOS-5 MODELING FRAMEWORK IN SUPPORT OF RETROSPECTIVE ANALYSES AND SEASONAL PREDICTION OF BIOSPHERE-ATMOSPHERE CO2 FLUX.2017. |
| 条目包含的文件 | 条目无相关文件。 | |||||
| 个性服务 |
| 推荐该条目 |
| 保存到收藏夹 |
| 导出为Endnote文件 |
| 谷歌学术 |
| 谷歌学术中相似的文章 |
| [GEORGE HURTT]的文章 |
| 百度学术 |
| 百度学术中相似的文章 |
| [GEORGE HURTT]的文章 |
| 必应学术 |
| 必应学术中相似的文章 |
| [GEORGE HURTT]的文章 |
| 相关权益政策 |
| 暂无数据 |
| 收藏/分享 |
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。
