Film Growth Morphology and Segregation in Pulsed Laser Deposition

脉冲激光沉积中的薄膜生长形态和偏析

• 批准号: 0306997
• 负责人: Michael Aziz
• 金额: $ 42.5万
• 依托单位: Harvard University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2007-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0306997&HistoricalAwards=false
• 关键词: Film; Growth; Morphology; Segregation; Pulsed

This grant emphasizes a fundamental study of thin film growth morphology and composition selection for Pulsed Laser Deposition (PLD). A major goal is to make a direct comparison between growth by PLD and by Molecular Beam Epitaxy (MBE) performed under identical conditions to facilitate the extension and modification of the extensive body of MBE knowledge to the PLD process. Initial experiments will be conducted using simple fcc and bcc metal systems, in particular Cu, Ni and Fe on Ag and Co, Fe, Rh, Pd and Pt on Cu. Characterization involves examination of non-wetting island nucleation, growth, coarsening and coalescence in the formation of thin metal films on insulating substrates, along with surface roughness evolution in homoepitaxial growth. Along with the experimental study of segregation of alloying elements at the surface and their burial and incorporation into the growing film, modeling efforts include simulations using 3-D Kinetic Monte Carlo code.This research program is designed so that its results will have broad applicability to a variety of nonequilibrium processing techniques for a wide variety of materials. The experimental effort will permit the formulation of broad principles that can be related to the research enterprise concerned with film growth. This research will facilitate the fabrication of new, interesting, and potentially useful and combinations of materials. The project supports the training of two graduate students contributing to their professional development.

该基金重点研究脉冲激光沉积（PLD）的薄膜生长形态和成分选择。一个主要目标是直接比较PLD和在相同条件下进行的分子束外延（MBE）生长，以促进扩展和修改广泛的MBE知识的PLD过程。将使用简单的fcc和bcc金属系统，特别是Ag上的Cu、Ni和Fe以及Cu上的Co、Fe、Rh、Pd和Pt进行初始实验。表征包括检查非润湿岛形核，生长，粗化和聚结在绝缘衬底上形成的薄金属膜，沿着在同质外延生长的表面粗糙度演变。沿着的实验研究偏析的合金元素在表面和他们的埋葬和纳入到生长的膜，建模工作包括模拟使用3-D动力学Monte Carlo codes.This研究计划的设计，使其结果将有广泛的适用性，以各种各样的非平衡处理技术，为各种各样的材料。实验的努力将允许制定广泛的原则，可以与有关的研究企业与电影的增长。 这项研究将促进新的，有趣的，潜在的有用的材料和组合的制造。该项目支持培训两名研究生，促进他们的专业发展。