Coupled Thermal and Mechanical Behavior of Conducting Polymer Nanostructures

导电聚合物纳米结构的热力学耦合行为

• 批准号: 0438389
• 负责人: Alexis Abramson
• 金额: $ 35万
• 依托单位: Case Western Reserve University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2005
• 资助国家: 美国
• 起止时间: 2005-05-01 至 2009-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0438389&HistoricalAwards=false
• 关键词: Coupled; Thermal; Mechanical; Behavior; Conducting

ABSTRACTNational Science FoundationProposal Number: CTS-0438389Principal Investigator: Abramson, Alexis RAffiliation: Case Western Reserve UniversityProposal Title: Coupled Thermal and Mechanical Behavior of Conducting Polymer NanostructuresConducting polymer nanostructures have gained attention by the nanoelectronics community because of their high electrical conductivity, mechanical flexibility and potential for low-cost manufacturing. Moreover, the properties of these nanosized polymer structures make them interesting candidates for additional applications such as for membrane materials, tissue scaffolding, sensing, and in composite materials. Improved characterization of coupled thermal and mechanical response of these nanostructures is expected to lead to a better understanding of the novel phenomena at the nanoscale that is essential to the nanoelectronics industry as well as for current and future applications. In view of the lack of understanding of the coupling between mechanical strain and thermal transport in conducting polymer nanostructures and the scientific and technological importance of the successful implementation of these materials to society, a collaborative three year multidisciplinary research effort comprising specialists in polymer processing/nanofabrication, transport properties at the nanoscale, and experimental nanomechanics is being proposed. The research will integrate three major ingredients, i.e. synthesis and nanofabrication, experimentation and modeling. The proposed research will focus on the behavior of thermal and mechanical properties (both coupled and uncoupled) of conducting polymer nanostructures as a function of temperature. Polyaniline nanostructures with different shape, size, morphology, and porosity will be investigated. The polymer nanostructures will be nanofabricated using a wet electropolymerization process. The design and development of a novel testing device will enable coupled mechanical and thermal measurements of the polyaniline nanostructures. This nano-tensilometer device is based on a novel modification to the commercially available Hysitron triboindenter and will be combined with specialized thermal probes. The device will be used inside a high resolution scanning electron microscope (SEM) with in-situ nanomanipulators. An electron-beam induced deposition (EBID) procedure will be employed to "nanoweld" the nanostructures to the probe tips or micro-device. A theoretical analysis will be utilized to complement experimental results and enable an improved understanding. It is emphasized that the proposed research program is innovative and novel and entails considerable nanofabrication, experimental and modeling challenges. It represents a major departure from the conventional and current techniques employed by the energy transport and experimental mechanics communities to investigate coupled thermal/mechanical behavior in micro- and/or nanoscale structures.A strong learning and teaching component, integral to the research objectives, will provide for significant educational enhancement for both undergraduate and graduate students and will provide for outreach opportunities for K-12 students. These students will greatly benefit from the inherently multidisciplinary nature of this project. Furthermore, they will have the opportunity for laboratory experience on and/or exposure to state-of-the-art modern instrumentation and cutting-edge research. In addition to the involvement of graduate students through their own research projects, CWRU strongly encourages the involvement of undergraduate students in faculty research projects through senior projects and/or laboratory courses. All involved students will be encouraged to participate in national conferences. Attention will also be paid towards the recruitment of underrepresented minority students. Furthermore, the PIs will contribute significant content from this research to the "Nanopedia," an extensive multi-faceted web-based learning approach to nanotechnology curriculum currently under development at CWRU. This resource will be available to university level and K-12 students as well as the general public.

国家科学基金项目编号：CTS-0438389主要研究者： 艾布拉姆森，亚历克西斯 Case Western Reserve UniversityProposal Title：Coupled Thermal and Mechanical Behavior of Conducting Polymer Nanostructures导电聚合物纳米结构由于其高导电性、机械柔性和低成本制造的潜力而受到纳米电子学界的关注。此外，这些纳米级聚合物结构的性质使它们成为其他应用的有趣候选者，例如用于膜材料、组织支架、传感和复合材料。这些纳米结构的耦合热和机械响应的改进表征预计将导致更好地理解纳米尺度上的新现象，这对纳米电子工业以及当前和未来的应用至关重要。鉴于缺乏对导电聚合物纳米结构中的机械应变和热传输之间的耦合的理解，以及这些材料对社会的成功实施的科学和技术重要性，正在提出一项为期三年的多学科合作研究工作，包括聚合物加工/纳米纤维，纳米级传输特性和实验纳米力学的专家。该研究将整合三个主要成分，即合成和纳米纤维，实验和建模。拟议的研究将集中在导电聚合物纳米结构的热性能和机械性能（耦合和非耦合）作为温度的函数的行为。聚苯胺纳米结构具有不同的形状，尺寸，形态和孔隙率将进行研究。聚合物纳米结构将使用湿法电聚合工艺进行纳米制造。设计和开发的一种新型的测试装置将使耦合的聚苯胺纳米结构的机械和热测量。这种纳米张力计设备是基于一种新的修改，以市售的Hysitron triboindenter，并将结合专门的热探头。该设备将用于高分辨率扫描电子显微镜（SEM）与原位纳米操纵器。将采用电子束诱导沉积（EBID）程序来将纳米结构“焊接”到探针尖端或微型装置。理论分析将被用来补充实验结果，使更好的理解。它强调，拟议的研究计划是创新和新颖的，需要相当大的纳米制造，实验和建模的挑战。它代表了一个主要的偏离传统和目前的技术所采用的能量传输和实验力学社区调查耦合热/力学行为在微观和/或纳米结构。一个强大的学习和教学组成部分，不可或缺的研究目标，将为本科生和研究生提供显著的教育增强，并将为K-12个学生。这些学生将极大地受益于这个项目固有的多学科性质。此外，他们将有机会获得实验室经验和/或接触最先进的现代仪器和尖端研究。除了研究生通过自己的研究项目的参与，CWRU强烈鼓励本科生通过高级项目和/或实验室课程参与教师的研究项目。将鼓励所有参与的学生参加全国会议。还将注意征聘代表性不足的少数民族学生。此外，PI将从这项研究的重要内容贡献给“纳米百科全书”，一个广泛的多方面的基于网络的学习方法，纳米技术课程目前正在开发中CWRU。该资源将提供给大学和K-12学生以及公众。