Nanorod Assembly in Polymer Matrices

聚合物基质中的纳米棒组装

• 批准号: 0907493
• 负责人: Russell Composto
• 金额: $ 51.2万
• 依托单位: University of Pennsylvania
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-09-01 至 2015-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0907493&HistoricalAwards=false
• 关键词: Nanorod; Assembly; Polymer; Matrices

TECHNICAL SUMMARYThe aim of the proposed research on ?Nanorod Assembly in Polymeric Matrices? is to understand the fundamental principles that drive nanorod assembly when spatially confined. An underlying theme is controlling the location, alignment and packing of nanorods to optimize targeted properties. The work to be undertaken during this project involves (1) orienting gold nanorods in homopolymer thin films and lamellar block copolymer films that confine the nanorods, and measuring their polarization dependent optical properties; (2) applying thermodynamic principles to design systems that incorporate and align gold nanorods within cylindrical domains of block copolymers, and then studying nanorod induced phase transformations in block copolymer morphologies; and (3) investigating unique nanorods including TiO2, silica with a gold nanoshell and Janus nanorod systems to explore how rod diameter, surface functionality, and biphasic surfaces direct the location of nanorods in block copolymers. A successful outcome of the proposed research will be precise control over assembly of functional nanorods in polymer films using spatial confinement. As a proof of concept, a nanorod/polymer device will be fabricated and its polarization-dependent optical properties tested to demonstrate that these coating can be used as color polarizing filters. NON-TECHNICAL SUMMARYPolymer nanocomposites (PNCs) are utilized in applications ranging from sports (golf balls) to transportation (tires) because they combine materials with synergistic properties. Presently, PNCs are attracting interest for information storage as well as electronic and energy applications. The proposed research will provide scientists with the rules for selecting the materials that will lead to optimum efficiency in PNCs. The broader impacts include laboratory experience for middle and high school students, high school teachers and undergraduates including those from underrepresented groups. An annual science day for middle school students (6th ? 8th grade) will continue at the University of Pennsylvania. In addition, female elementary school students are introduced to a summer camp called Girls in Engineering Math & Science Camp (GEMS). A successful partnership with Central High School (CHS) in Philadelphia that has already resulted in a new innovative Materials Science course will continue. Future plans include extending the course from one to two sections, developing laboratories, exposing students to new characterization tools, and facilitating joint research projects. The first materials science textbook aimed at high school students is also planned. Because CHS draws academically talented, multicultural and diverse (32% African American, 5% Latino, 50% female) students, this partnership will have a profound and lasting impact on the scientific and technological literacy of underrepresented groups.

技术摘要“聚合物基体中的纳米棒组装”拟议研究的目的是了解在空间受限时驱动纳米棒组装的基本原理。一个基本主题是控制纳米棒的位置、排列和堆积，以优化目标特性。该项目要开展的工作包括（1）在均聚物薄膜和限制纳米棒的层状嵌段共聚物薄膜中定向金纳米棒，并测量其偏振相关的光学特性； （2）应用热力学原理设计系统，将金纳米棒合并并排列在嵌段共聚物的圆柱域内，然后研究纳米棒诱导的嵌段共聚物形态的相变； (3) 研究独特的纳米棒，包括 TiO2、带有金纳米壳的二氧化硅和 Janus 纳米棒系统，以探索棒直径、表面功能和双相表面如何指导纳米棒在嵌段共聚物中的位置。该研究的成功成果将是利用空间限制精确控制聚合物薄膜中功能纳米棒的组装。作为概念验证，将制造纳米棒/聚合物器件并测试其与偏振相关的光学特性，以证明这些涂层可以用作彩色偏振滤光片。非技术摘要聚合物纳米复合材料 (PNC) 的应用范围广泛，从运动（高尔夫球）到交通运输（轮胎），因为它们结合了具有协同特性的材料。 目前，PNC 正在引起人们对信息存储以及电子和能源应用的兴趣。 拟议的研究将为科学家提供选择材料的规则，从而实现 PNC 的最佳效率。更广泛的影响包括对中学生、高中生、高中教师和本科生（包括来自代表性不足群体的学生）的实验室体验。 宾夕法尼亚大学将继续为中学生（六年级至八年级）举办一年一度的科学日活动。此外，还向女小学生介绍了名为“工程数学与科学女孩营”(GEMS) 的夏令营。 与费城中央高中 (CHS) 的成功合作关系已经产生了新的创新材料科学课程，该合作关系将继续下去。未来的计划包括将课程从一个部分扩展到两个部分、开发实验室、让学生接触新的表征工具以及促进联合研究项目。第一本针对高中生的材料科学教科书也在计划中。 由于 CHS 吸引了学术才华横溢、多元文化和多元化（32% 非裔美国人、5% 拉丁裔、50% 女性）的学生，因此这种伙伴关系将对代表性不足群体的科技素养产生深远而持久的影响。