Multi-Componenet Nanopillar Coatings

这一实验和理论相结合的研究工作的重点是探索、演示和定量建模一种新的方法，以创建由多种不同材料组合组成的纳米管涂层。我们提出的方法建立在先前发展的掠掠角沉积(GRAD)技术的基础上，该技术基于视线气相沉积过程中自组织表面堆结构的局部原子阴影效应。这个项目的主要新颖性是将GREE扩展到从相反的多个来源同时沉积(So-GREE)。由此产生的层将包含纳米管和/或纳米弹簧，由多种材料组成，垂直和水平堆叠，具有独特的新的机电、光学和催化功能。该计划将协同使用实验层生长和原子计算机模拟，以评估和量化表面扩散、表面形态演变和原子阴影机制的复杂影响。除了基本的生长研究外，我们还将通过创建(A)基于TiN/CrN双组分纳米柱的平面内纳米层状硬质涂层来探索这一技术的应用。(B)具有纳米管的智能涂层，同时充当传感器和执行器。(C)具有独特阻尼和高灵敏度的多组分纳米弹簧传感器阵列。该项目将开发一种新的方法来制造涂层，这种涂层有可能显著提高各种技术部件的性能。这些新涂层是用各种原子束组装而成的。潜在的应用包括用于干式高速切割和节能型喷气发动机的硬质耐磨涂层，用于未来药物发现或医学分析仪器的自动调节化学纳米反应器的智能涂层，以及用于机器人应用的具有独特阻尼和高灵敏度压力响应的纳米弹簧传感器阵列。两名研究生和六名本科生将在这个跨学科合作研究项目中工作，该项目将与具有互补的实验(GALL)和理论(黄)专业知识的年轻原则研究人员联系起来。该项目将为两个研究组的本科生和研究生提供开阔视野的体验。拟议工作的一个组成部分是开发教室薄膜生长模拟器，该模拟器将说明支配层沉积的原子过程，并将被整合到一门核心工程课程中，每年影响300多名学生。

The focus of this combined experimental and theoretical research effort is to explore, demonstrate, and quantitatively model a new approach for creating coatings consisting of nanopillars that are built of multiple diverse materials combinations. Our proposed approach builds on a previously developed glancing angle deposition (GLAD) technique, which is based on local atomic shadowing effects from self-organized surface mound structures during line-of-sight vapor phase deposition. The key novelty of this project is to expand GLAD to simultaneous deposition from multiple sources from opposite sides (SO-GLAD). The resulting layers will contain nanopillars and/or nanosprings that consist of multiple materials, stacked both vertically and horizontally, with unique new electro-mechanical, optical, and catalytic functionalities. The program will synergistically employ both experimental layer growth and atomistic computer simulations in order to assess and quantify the convoluted effects of surface diffusion, surface morphological evolution, and atomic shadowing mechanisms. In addition to the fundamental growth studies, we will explore applications for the SO-GLAD technique by creating (a) in-plane nanolayered hard-coatings based on TiN/CrN two-component nanocolumns. (b) smart coatings with nanopillars that simultaneously act as sensors and actuators. (c) multi-component nanospring sensor arrays with unique damping and high-sensitivity.This project will develop a new method to create coatings that have the potential to dramatically enhance the performance of a wide range of technological parts. These new coatings are assembled using beams of various atoms. Potential applications include hard wear-resistant coatings for dry high-speed cutting and fuel-efficient jet-engines, smart coatings for self-regulatory chemical nanoreactors in future drug discovery or medical analysis apparatus, and nanospring sensor arrays with unique damping and high-sensitivity pressure response for robotic applications. Two graduate students and six undergraduates will work in this interdisciplinary collaborative research program, which will link to young principle investigators with complementary experimental (Gall) and theoretical (Huang) expertise. The program will provide a mind-broadening experience for undergraduate and graduate students in both research groups. An integral part of the proposed effort is the development of a classroom thin film growth simulator which will illustrate the atomistic processes that govern layer deposition and will be integrated in a core-engineering course, impacting over 300 students per year.