MRI: Acquisition of a Small-Angle X-Ray Scattering/Wide-Angle X-Ray Diffraction (SAXS/WAXD) System for the Characterization of Nanostructured Materials

MRI：获取小角 X 射线散射/广角 X 射线衍射 (SAXS/WAXD) 系统，用于表征纳米结构材料

• 批准号: 0923107
• 负责人: Robert Moore
• 金额: $ 51.21万
• 依托单位: Virginia Polytechnic Institute and State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-10-01 至 2012-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0923107&HistoricalAwards=false
• 关键词: MRI; Acquisition; Small; Angle; Ray

0923107MooreVPI & SUTechnical Summary: As an essential compliment to select-area, electron microscopy of local order within materials, simultaneous small-angle x-ray scattering/wide-angle x-ray diffraction (SAXS/WAXD) offers a more global perspective in its ability to probe bulk, nanoscale morphologies over a wide range of length-scales, within a broader range of sample states from liquids to solids. This proposal involves the acquisition, installation and implementation of a state-of-the-art, high-resolution, 3-pinhole collimated, simultaneous SAXS/WAXD instrument with an added capability of grazing incidence for the structural analysis of ordered surfaces. The proposed instrument is necessary to fill a critical void in our nanostructure characterization capabilities at Virginia Tech in support of our polymer-related activities associated with the Macromolecules and Interfaces Institute (MII), a variety of NSF sponsored programs in active nanostructures, DOD and DOE-sponsored programs, and activities stemming from our newly established ICTAS Nanoscale Characterization and Fabrication Laboratory. Given the broad versatility of morphological experiments available with this rare instrument, our multidisciplinary research efforts will involve structural analysis of nanostructured systems ranging from aqueous, colloidal suspensions of biopolymer complexes to solid-state membranes for energy applications and water purification, structurally-controlled semi-crystalline polymers and blends, tailored nanocomposite materials, and self-assembled surface structures. The proposed SAXS/WAXD instrument will be a cornerstone system in our multi-user Nanoscale Characterization and Fabrication Laboratory, and will stimulate institutional and national/international collaborations (among academia and industry) as a center for morphological analysis of nanostructured materials. Along with associated theoretical and practical training, this new capability will be open to enhance the science and engineering efforts of a diverse population of students and researchers. Layman Summary: Small-angle x-ray scattering is a method used to measure the internal structure and form (in the dimension of nanometers) of solid materials and complex solutions by irradiating a complex sample with a fine beam of x-rays and capturing a projection of the scattered x-rays with a sensitive detector placed at a significant distance from the sample. Federally-funded and industrially-sponsored research projects associated with this proposed instrument will involve structural characterization of a wide variety of new materials that will impact activities ranging from the development of efficient, energy conversion devices to bio-functional materials needed to address critical health issues in our modern society. Each of these novel research activities requires the structural information obtainable with state-of-the-art SAXS/WAXD methods in order to gain fundamental insight into morphology-property relationships that will drive the development of the next generation of nanostructured materials for a variety of technological applications. The proposed SAXS/WAXD instrument will be a cornerstone system in our multi-user Nanoscale Characterization and Fabrication Laboratory, and will stimulate collaborations (among academia and industry) as a center for morphological analysis of nanostructured materials. Along with associated theoretical and practical training, this new capability will be open to enhance the science and engineering efforts of a diverse population of students and researchers.

0923107 MooreVPI& SU技术总结：作为一个必要的补充，选择区域，电子显微镜的材料内的局部秩序，同时小角X射线散射/广角X射线衍射（SAXS/WAXD）提供了一个更全面的视角，在其能力，探测散装，纳米级形态在很宽的长度范围内，在更广泛的样品状态从液体到固体。该提案涉及收购，安装和实施一个国家的最先进的，高分辨率，3针孔准直，同时SAXS/WAXD仪器与一个额外的能力，掠入射的有序表面的结构分析。拟议的仪器是必要的，以填补我们的纳米结构表征能力在弗吉尼亚理工大学在支持我们的聚合物相关的活动与高分子和界面研究所（MII），各种NSF赞助的计划，在积极的纳米结构，国防部和能源部赞助的计划，和活动源于我们新成立的ICTAS纳米表征和制造实验室的关键空白。 鉴于广泛的多功能性形态学实验与这种罕见的仪器，我们的多学科研究工作将涉及纳米结构系统的结构分析，从水，胶体悬浮液的生物聚合物复合物的固态膜的能源应用和水净化，结构控制的半结晶聚合物和共混物，定制的纳米复合材料，和自组装的表面结构。拟议的SAXS/WAXD仪器将成为我们多用户纳米表征和制造实验室的基石系统，并将刺激机构和国家/国际合作（学术界和工业界）作为纳米结构材料形态分析的中心。沿着相关的理论和实践培训，这种新的能力将开放，以加强学生和研究人员的多元化人口的科学和工程努力。Layman总结：小角度X射线散射是一种用于测量固体材料和复杂溶液的内部结构和形式（纳米尺寸）的方法，通过用精细的X射线束照射复杂样品，并用放置在离样品显著距离处的灵敏检测器捕获散射X射线的投影。 联邦资助和工业赞助的研究项目将涉及各种新材料的结构表征，这些新材料将影响从开发高效的能量转换设备到解决现代社会关键健康问题所需的生物功能材料等活动。 这些新的研究活动中的每一个都需要用最先进的SAXS/WAXD方法获得的结构信息，以获得对形态-性质关系的基本见解，这将推动下一代纳米结构材料的开发，用于各种技术应用。 拟议的SAXS/WAXD仪器将是我们的多用户纳米表征和制造实验室的基石系统，并将刺激合作（学术界和工业界）作为纳米结构材料形态分析的中心。沿着相关的理论和实践培训，这种新的能力将开放，以加强学生和研究人员的多元化人口的科学和工程努力。