Hybrid Ferromagnet/Semiconductor Nanodots and Nanowires

技术.本计画针对半导体及铁磁体之奈米点及奈米线阵列之制造，提出新的理解与进展。该方法涉及使用多孔氧化铝模板的多步骤过程，并且正在研究用于精确控制纳米粒子及其在制造新型纳米阵列中的用途。将追求与垂直异质结构，铁磁/半导体纳米器件的MBE生长的III-V族半导体和Heusler合金的基础上制造的合成和加工现象。GaAs的纳米线已经通过MBE使用Au催化的气-液-固（VLS）生长来实现，并且将在该项目中进一步研究以生长由铁磁（例如，MnAs）和半导体材料。广泛的实验工具和专业知识将被用于系统的调查，旨在获得更大的基本了解的电，磁和纳米结构材料和器件的光学特性。非技术性。该项目解决了具有技术相关性的电子/光子材料科学主题领域的基础研究问题。这项研究有可能对新型电子器件的发展产生重大影响，如非易失性存储器和纳米线电子电路。新型纳米结构的发展甚至可以为以前从未考虑过的新设备设计打开大门。在电子、磁性和光学纳米结构领域-这些领域对信息技术的未来应用至关重要-教育和培训年轻人对该项目至关重要。除了培养学生在科学和工程的各个方面，该项目夫妇与现有的教育推广到K-12学生，妇女和代表性不足的群体，通过活动已经建立在东北大学与这些PI的积极参与方案。四到八名本科生将通过东北大学独特的合作项目为研究做出贡献，高中生将参与夏季研究项目。

Technical. This project addresses new understanding and progress in fabricating novel nanodot and nanowire arrays of semiconductors and ferromagnets. The approach involves a multi-step process using porous alumina templates, and is being studied for precise control of nanopatterns and its use in fabrication of novel nanoarrays. Synthesis and processing phenomena associated with the fabrication of vertically heterostructured, ferromagnet/semiconductor nanodevices based on MBE-grown III-V semiconductors and Heusler alloys will be pursued. Nanowires of GaAs have been achieved via MBE using Au-catalyzed vapor-liquid-solid (VLS) growth and will be further studied on this project for growing arrays of hybrid nanowires composed of ferromagnetic (e.g., MnAs) and semiconducting materials. A wide range of experimental tools and expertise will be utilized for systematic investigations aimed at gaining greater fundamental understanding of electrical, magnetic, and optical properties of nanostructured materials and devices. Non-Technical. The project addresses fundamental research issues in a topical area of electronic/photonic materials science having technological relevance. There is potential that the research could substantially impact the development of novel electronic devices such as nonvolatile memories and nanowire electronic circuits. Development of novel nanostructures could even open doors to new device designs never before contemplated. Educating and training young people in the areas of electronic, magnetic and optical nanostructures--areas which are crucial for future applications in information technology is of primary importance to this project. In addition to training students in diverse aspects of science and engineering, this project couples with existing educational outreach to K-12 students, women, and underrepresented groups through activities in programs already established at Northeastern University with active participation by these PIs. Four to eight undergraduates will contribute to the research through Northeastern's unique Co-op program, and high school students will be involved in summer research programs.