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TASC的自由簇和低能簇束沉积研究

Studies of Free Clusters and of Low Energy Cluster Beam Deposition at TASC
课程网址: http://videolectures.net/slonano07_desimone_sfc/  
主讲教师: Monica de Simone
开课单位: 约瑟夫·斯特凡学院
开课时间: 2008-02-12
课程语种: 英语
中文简介:
了解尺寸和性能之间的相互作用是生产定制簇组装材料的必要步骤。为了研究团簇的功能特性，其尺寸依赖性的几何形状和电子结构，以及与通过团簇沉积获得的纳米组装材料的相关性，TASC最近获得了一种新的UHV兼容漫游超音速团簇源。团簇的生产过程基于脉冲微溅射，位于旋转棒（PMCS）的表面。该材料必须是导体或加热到导电温度的半导体。该设备被认为是能够与位于TASC INFM的各种UHV兼容系统（室内设备和ELETTRA的同步辐射束线）耦合的设施。在这里，我们介绍了与教授合作获得的一些初步结果。 P. Milani的小组。在第一类实验中，我们集中精力研究自由簇上的内壳吸收光谱。实验是在气相束线上进行的，这是首次有可能在自由过渡金属簇上获得完整的近边缘X射线吸收精细结构谱图（Ti簇的Ti L边缘尺寸介于15和1000个原子/簇）。在材料科学领域，我们的首次测量致力于研究TASC分析部门实验室进行的纳米结构钛膜的氧化动力学。
课程简介: The understanding of the interplay between size and properties is a necessary step towards the production of tailored cluster-assembled materials. With the aim of investigating functional properties of clusters, their size-dependent geometry and electronic structure, and the correlations with nanoassembled materials obtained by cluster deposition, TASC recently acquired a new UHV-Compatible Roaming Supersonic Cluster Source. The procesess of cluster production is based on the pulsed microsputtering, localised on the surface of a rotating rod (PMCS). The material must be a conductor one or a semiconductor heated to the conductive temperature. This apparatus is conceived as a facility able to be coupled to a variety of UHV compatible systems located at TASC-INFM (both in-house apparatus and syncrotron radiation beam lines at ELETTRA). Here we presents some of our first results we obtained within a collaboration with the prof. P. Milani’s group. In the first class of experiment we concentrated our efforts on the study of inner shell absorption spectroscopy both on free clusters. The experiments have been carried out at the Gas Phase beamline, and for the first time it was possible to obtain a complete set of Near Edge X-ray Absorption Fine Structure spectra on free transition metal clusters (Ti L-edge for Ti clusters with size comprised between 15 and 1000 atoms/cluster). Within the field of material science, our first measurements were dedicated to the study of oxidation dynamics of nanostructured titanium films performed at the Analytical Division Laboratory at TASC
关 键 词: 定制簇; 氧化动力学; 纳米组装材料
课程来源: 视频讲座网
最后编审: 2019-09-25：yuh
阅读次数: 112

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