GOALI: Structure of Amorphous Materials by Fluctuation Microscopy and Atomic-Level Modeling

这是一个由材料研究部和MPS多学科活动办公室联合资助的新的GALI奖。Keblinski做材料建模，并与NEC的显微镜专家Treacy合作，使用建模和波动显微镜研究非晶硅和Ge中的准晶(具有中程有序的区域)。研究生和本科生都将参与这个项目。最近对涨落光谱中的中程有序的观察表明，需要一个非晶态固体的结构模型来代替没有中程有序的连续随机网络。这笔赠款将促进一项合作探索：从实验上探索诱导、维持和消除中期有序的条件，以及理论上具有特别有利于中期有序存在的特征的原子尺度模型。这项工作将有助于更好地了解玻璃的结构细节以及它们形成的热力学和动力学。%这是由材料研究部和MPS多学科活动办公室联合资助的一个新的目标奖。RPI的Keblinski和NEC的Treacy将合作进行研究。研究生和本科生都将参与其中。理论、原子尺度的建模和模拟将在RPI进行，并与NEC进行的实验工作频繁地交换结果和想法。新发现的涨落显微镜的应用提出了几个问题，也许最突出的是中程有序问题。最著名的玻璃结构模型，连续随机网络模型没有显示出中等范围的有序性。人们需要一个原子水平的模型来探索这种秩序存在所必需的特征。其他问题可能是，热力学结果是什么，这些玻璃中的动力学过程的结果是什么。

0074273KeblinskiThis is a new GOALI award funded jointly by the Division of Materials Research and the MPS Office of Multidisciplinary Activities. Keblinski does materials modeling and is collaborating with Treacy, a microscopist at NEC, to study paracrystallites (regions with medium range order) in amorphous Si and Ge using modeling and fluctuation microscopy. Both graduate and undergraduate students will be involved in this project. A recent observation of medium range order in fluctuation spectroscopy has shown the need of a structural model for an amorphous solid in place of the continuous random network which shows no medium range order. This grant will facilitate a collaborative exploration: experimentally of the conditions which induce, sustain and remove medium range order and theoretically, atomic scale models with characteristics which are particularly conducive to the existence of medium range order. This work will lead to a better understanding of the structural details of glasses as well as the thermodynamics and kinetics of their formation.%%%This is a new GOALI award funded jointly by the Division of Materials Research and the MPS Office of Multidisciplinary Activities. Keblinski at RPI and Treacy at NEC will conduct research in collaboration. Both graduate and undergraduate students will be involved. The theoretical, atomic scale modeling and simulation will be carried out at RPI with frequent exchange of results and ideas with the experimental work conducted at NEC. The newly discovered application of fluctuation microscopy has raised several questions, perhaps the most prominent is the question of medium range order. The best-known model for the structure of glass, the continuous random network model shows no medium range order. One needs an atomic level model to explore the characteristics necessary for such order to exist. Other questions might be, what are the thermodynamic consequences, what are the consequences for the kinetic processes in these glasses.***