MRI-R2: Acquisition of Equipment for Rare Earth Spectroscopic Studies of Sol-Gel Glass Structure

MRI-R2：购置用于溶胶-凝胶玻璃结构稀土光谱研究的设备

• 批准号: 0959552
• 负责人: Daniel Boye
• 金额: $ 16.84万
• 依托单位: Davidson College
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-03-01 至 2013-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0959552&HistoricalAwards=false
• 关键词: MRI; R2; Acquisition; Equipment; Rare

0959552BoyeDavidson CollegeTechnical Summary: This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). Sol-gel derived glass containing fluorescing rare earth (RE) ions are potentially useful in applications such as lasers, optical sensors, and fiber optic and photonic devices. However, the optical behavior of RE-doped sol-gel glasses is not yet fully understood. The work proposed here will use optical spectroscopy to answer fundamental questions about the ways that sol-gel glass structure influences RE fluorescence yield. Two primary non-radiative decay mechanisms have been identified: deactivation through vibrational excitation of neighboring hydroxyl complexes and the silica matrix, and energy transfer among clustered RE ions on pore surfaces. This project will explore new synthesis techniques, including the use of drying control chemical agents in the starting solutions, to reduce fluorescence quenching. RE ions will be used as spectroscopic probes of structural parameters such as pore connectivity to aid in identifying the most effective methods for minimizing the RE-hydroxyl interactions. In addition, studies of energy transfer among RE ions will be used to explore how RE ion distribution in the porous sol-gel matrix correlates with synthesis protocols. These measurements will be crucial in optimizing the optical performance of these materials by achieving a more uniform distribution of RE ions in the glass. The goal is to obtain a deeper understanding of the fluorescence behavior of the RE ions, leading to a new class of more efficient fluorescent materials for the applications listed above. Our innovative research program in materials science involves collaboration between faculty and students at three undergraduate liberal arts colleges - Davidson, Hamilton, and Whitman Colleges. The new equipment provided by this grant will expand each laboratory's unique ability to perform time-based and cw spectroscopies. Undergraduate students will be involved in every aspect of this cross-disciplinary project and will benefit from increased opportunities to perform research with state-of-the-art equipment at the different participating colleges.Layman Summary: This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5). Sol-gel materials have interesting uses in a surprisingly broad range of disciplines - from coatings on aircraft to hosts for biologically active enzymes. The sol-gel glass process uses readily available starting materials and relatively low temperatures to produce glasses with optical behavior comparable to glasses made by the traditional melt process. Creating new optical materials that are potentially useful in applications such as phosphor lighting, lasers, optical sensors, and fiber optic and photonic devices is the focus of our efforts. Our innovative research program in materials science involves collaboration between faculty and students at three undergraduate liberal arts colleges - Davidson, Hamilton, and Whitman Colleges. By leveraging the strengths of our individual laboratories, we will continue to make significant progress in understanding the ways that energy is absorbed, transferred and released by fluorescing Rare Earth (RE) ions in the glass. Undergraduate students are involved at all stages of this research process from grant writing to experimental design and implementation and on to publication in refereed journals and presentations at professional meetings. In fact, two of our recent students have received national recognition for their research. The new equipment provided by this grant will greatly expand each laboratory's unique ability to examine the time evolution and energy distribution of light emitted by RE ions in these materials. Building on the existing synergy of our collaboration, an increased number of students will be provided with more varied opportunities to explore cutting edge scientific ideas while working with state-of-the-art equipment. Our scientific goals are to obtain a deeper understanding of the interaction among RE ions, and between RE ions and their glass host, leading to a new class of more efficient fluorescent materials available for optical applications.

0959552BOYEDAVIDSON COLLEGNICAL摘要：该奖项是根据2009年《美国复苏与再投资法》（公法111-5）资助的。含有荧光稀土离子的溶胶 - 凝胶衍生的玻璃在激光器，光学传感器以及光纤和光子设备等应用中可能有用。 但是，尚未完全了解重掺杂的溶胶 - 凝胶眼镜的光学行为。 这里提出的工作将使用光谱法来回答有关溶胶 - 凝胶玻璃结构影响荧光产量的方式的基本问题。 已经确定了两种主要的非辐射衰减机制：通过邻近羟基复合物和二氧化硅基质的振动激发通过振动激发，以及孔隙表面上聚类的Re离子之间的能量转移。 该项目将探索新的合成技术，包括在起始溶液中使用干燥控制化学剂，以减少荧光淬火。 RE离子将用作结构参数的光谱探针，例如孔连接性，以帮助识别最小化羟基相互作用的最有效方法。 此外，对离子之间的能量转移的研究将用于探索多孔溶胶基质中的RE离子分布与合成方案的相关性。 这些测量值对于通过在玻璃中获得更均匀的Re离子分布来优化这些材料的光学性能至关重要。 目的是更深入地了解RE离子的荧光行为，从而为上述应用提供了新的更有效的荧光材料。 我们在材料科学方面的创新研究计划涉及三所大学文科学院的教职员工与学生之间的合作 - 戴维森，汉密尔顿和惠特曼学院。 该赠款提供的新设备将扩大每个实验室执行基于时间和CW光谱的独特能力。 本科生将参与该跨学科项目的各个方面，并将受益于在不同参与学院的最先进设备进行研究的机会中受益。layman摘要：该奖项是根据2009年的《美国复苏和再投资法》（Privical Law Lage Bruphing Law）资助的。 Sol -Gel材料在令人惊讶的广泛学科中具有有趣的用途 - 从飞机上的涂料到生物活性酶的宿主。 Sol-Gel玻璃工艺使用易于使用的起始材料和相对较低的温度来产生具有光学行为的玻璃，可与传统熔体过程相当。 创建新的光学材料，这些材料在诸如磷光灯，激光器，光学传感器以及光纤和光子设备之类的应用中可能有用，这是我们努力的重点。 我们在材料科学方面的创新研究计划涉及三所大学文科学院的教职员工与学生之间的合作 - 戴维森，汉密尔顿和惠特曼学院。 通过利用我们各个实验室的优势，我们将继续取得重大进展，以了解能量通过在玻璃中荧光稀土（Re）离子吸收，转移和释放的能量的方式。 本科生都参与了从赠款写作到实验设计和实施以及在专业会议上的裁量期刊和演讲中出版的各个阶段。 实际上，我们最近的两名学生因其研究而获得了国家认可。 这笔赠款提供的新设备将大大扩展每个实验室的独特能力，以检查这些材料中reion发出的光的时间演变和能量分布。 在我们合作的现有协同作用的基础上，将为越来越多的学生提供更多的机会，可以在使用最先进的设备时探索最前沿的科学思想。 我们的科学目标是更深入地了解Re离子之间的相互作用，以及Re Ions及其玻璃宿主之间的相互作用，从而导致一类新的更有效的荧光材料可用于光学应用。