FRG NIRT: Science and Technology of Self-Assembled Magnetic and Superconducting Nano Arrays

该提案是响应纳米尺度科学与工程计划，NSF 03-043，类别NIRT而收到的。来自北卡罗来纳州立大学（NCAT）、北卡罗来纳州立大学（NCSU）、佛罗里达大学（UF）、橡树岭国家实验室（ORNL）、印度理工学院、坎普尔（IITK）和IBM TJ沃森中心的科学家和学生组成的多学科团队参与了这个项目。本文的研究重点是(i)非磁性薄膜基质中的纳米磁性颗粒和（ii）高温超导薄膜基质中的纳米级杂质缺陷的自组装有序结构的合成和表征。应变场的原理创造了均匀的岛屿阵列，首次被用于过渡金属、过渡金属合金和复合氧化物纳米颗粒的自组织相干生长，这些纳米颗粒在薄膜基质中具有可控制的形状、尺寸和分离。扫描透射电子显微镜和电子能量损失谱的结果将用于建立微观结构和物理性质之间明确的相关性。该项目的最终目标是制造具有增强性能的自组装纳米颗粒基器件。拟议的教育和推广活动包括：为研究生、本科生、K-12学生和教师开发基于纳米材料的研究和教育计划，早期招募代表性不足的本科生，为更多的女性和少数民族学生追求更高的学位提供动力，以及培养多样化的技术劳动力和了解纳米科学和纳米技术问题的公众。该提案是响应纳米尺度科学与工程计划，NSF 03-043，类别NIRT而收到的。该项目的成功将导致在薄膜介质中创造出粒径更小、粒径分布更紧密、成分更优化、颗粒取向更明确的自组装磁性颗粒。这些能力有望导致超高密度磁记录和自旋电子学的革命性进展。同样，提出的自组装工艺将为超导薄膜中的涡流提供更好的固定位置，并将使传输电缆、微波和隧道电子设备在更高温度下更有效地运行。就长期利益而言，拟议的NIRT活动将导致(i)加强NCAT基于纳米材料的研究，（ii）为未被充分代表的群体的本科生，研究生和博士后提供教育和培训计划，（iii）为K-12学生和教师提供新的学习机会，以及（iv）激励更多的女性和少数民族学生追求更高的学位。

This proposal was received in response to Nanoscale Science and Engineering initiative, NSF 03-043, category NIRT. A multidisciplinary team of scientists and students from North Carolina A & T State (NCAT) University (an HBCU institution), North Carolina State University (NCSU), University of Florida (UF), Oak Ridge National Laboratory (ORNL), Indian Institute of Technology, Kanpur (IITK) and IBM TJ Watson Center, participates in this project. The proposed research is focused on the synthesis and characterization of self-assembled ordered structures of (i) nanomagnetic particles in nonmagnetic thin-film matrices and (ii) nanodimensional impurity defects in a high temperature superconducting thin film matrix. The principle of strain fields to create uniform arrays of islands is being used for the first time for self-organized coherent growth of transition metal, transition metal alloys, and complex-oxide nanoparticles having controlled shape, dimension, and separation in thin-film matrices. The results from scanning transmission electron microscopy and electron energy loss spectroscopy will be used in establishing an unambiguous correlation between microstructure and physical properties. The final goal of this project is the fabrication of self-assembled nanoparticulate based devices with enhanced performance. The proposed educational and outreach activities include: development of nanomaterials based research and education programs for graduate, undergraduate, K-12 students and teachers, early recruitment of an underrepresented population of undergraduate students, providing motivation for more women and minority students to pursue advanced degrees, and generation of a diversified skilled workforce and informed public in nanoscience and nanotechnology issues. This proposal was received in response to Nanoscale Science and Engineering initiative, NSF 03-043, category NIRT. The success of the project will lead to the creation of self-assembled magnetic particles in thin-film media with smaller particle size, tighter size distribution, optimized compositions, and specified particle orientation. These capabilities are expected to lead to revolutionary progress in ultra-high density magnetic recording and spintronics. Similarly, the proposed self-assembly process will provide improved pinning sites for vortices in superconducting thin films and will result in more efficient operation of transmission cables, microwave, and tunneling electronic devices at higher temperatures. With respect to long term benefits, the proposed NIRT activities will lead to (i) strengthening nanomaterials based research at NCAT, (ii) education, and training programs for undergraduates, graduates and post-doctoral fellows from underrepresented groups, (iii) new learning opportunities for K-12 students and teachers, and (iv) motivating more women and minority students to pursue advanced degrees.