NER: Spin-Polarized Injection and Transport in Polymers

NER：聚合物中的自旋极化注入和传输

• 批准号: 0304609
• 负责人: Michael Winokur
• 金额: $ 9.99万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-06-01 至 2004-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0304609&HistoricalAwards=false
• 关键词: NER; Spin; Polarized; Injection; Transport

This Nanoscale Exploratory Research (NER) proposal was submitted in response to the solicitation "Nanoscale Science and Engineering" (NSF 02-148). The project undertakes an exploratory study of spin injection and transport in organic and polymeric conductors. The approach is to fabricate organic heterostructures, employing solid-state magnetic electrodes as a source of spin polarized carriers, and manipulate the nanoscale interfacial properties using molecular self-assembly and related techniques. Spin will be injected into semiconducting and conducting polymer/organic thin films. Several specific systems consistent with "exploratory" time scales and support levels, including the organic analog of giant magnetoresistance, spin-injected organic/polymer light-emitting diodes, and tunneling from magnetic nanocrystals through organic layers will be addressed. In these systems, the interface is judged to be of critical importance since it controls injection characteristics through the electronic barrier height in the case of electronic charge, and spin-scattering characteristics in terms of magnetic electrodes. It is anticipated that interfacial control will be afforded by organic systems to manipulate spin-injection properties through the use of interfacial self-assembled monolayers, and surface doping of the barrier polymer by chemical or electrochemical means. %%% The project addresses basic exploratory research issues in a topical area of materials science with high technological relevance; it is considered a high risk/high pay-off activity. Conducting polymers and molecular organics are rapidly becoming technologically important materials because of their unique fusion of semiconducting electronic properties with the flexibility of organic/polymeric materials. A wide variety of electronic devices have been demonstrated with organic materials, such as light-emitting diodes, laser diodes, and field-effect transistors. The advantages of resulting 'plastic' electronic devices include ease of fabrication, scalability, and molecular-level control of interfacial morphology and electronic characteristics. The project encompasses the research and education theme of Nanoscale Structures, Novel Phenomena, and Quantum Control. An important feature of the program is the integration of research and education through the training of students in a fundamentally and technologically significant area. The project is expected to have broad impact by providing unique educational opportunities and basic knowledge critical to potential development of organic spintronic devices having advantages of both organic electronics and solid-state spintronics. The project is jointly supported by the MPS/DMR/EM and MPS/DMR/POL programs.***

本纳米探索性研究（NER）提案是应“纳米科学与工程”（NSF 02-148）的要求提交的。该项目对有机和聚合物导体中的自旋注入和输运进行了探索性研究。 该方法是制造有机异质结构，采用固态磁电极作为自旋极化载流子的来源，并利用分子自组装和相关技术操纵纳米级界面性质。自旋将被注入到半导体和导电聚合物/有机薄膜中。几个具体的系统符合“探索”的时间尺度和支持水平，包括巨磁电阻的有机模拟，自旋注入有机/聚合物发光二极管，并从磁性纳米晶体通过有机层的隧道将得到解决。在这些系统中，界面被认为是至关重要的，因为它控制注入特性通过电子势垒高度的情况下的电子电荷，和自旋散射特性的磁性电极。可以预期的是，界面控制将提供有机系统，通过使用界面自组装单分子层，和表面掺杂的屏障聚合物的化学或电化学手段来操纵自旋注入性能。该项目解决了材料科学主题领域的基础探索性研究问题，具有高技术相关性;它被认为是一项高风险/高回报的活动。导电聚合物和分子有机物由于其独特的半导体电子性质与有机/聚合物材料的柔性的融合而迅速成为技术上重要的材料。各种各样的电子器件已经被证明具有有机材料，例如发光二极管、激光二极管和场效应晶体管。由此产生的“塑料”电子器件的优点包括易于制造、可扩展性以及界面形态和电子特性的分子水平控制。该项目包括纳米结构，新现象和量子控制的研究和教育主题。该计划的一个重要特点是通过在一个基本和技术上重要的领域对学生进行培训来整合研究和教育。该项目预计将产生广泛的影响，提供独特的教育机会和基础知识的有机自旋电子器件的潜在发展具有有机电子学和固态自旋电子学的优势至关重要。该项目由MPS/DMR/EM和MPS/DMR/POL计划共同支持。***