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.

摘要美国国家科学基金会提案编号：CTS-0438389 首席研究员：Abramson, Alexis 所属单位：凯斯西储大学提案标题：导电聚合物纳米结构的耦合热与机械行为导电聚合物纳米结构因其高导电性、机械灵活性和潜力而受到纳米电子学界的关注用于低成本制造。此外，这些纳米级聚合物结构的特性使其成为其他应用的有趣候选者，例如膜材料、组织支架、传感和复合材料。这些纳米结构耦合热和机械响应的表征的改进预计将有助于更好地理解纳米尺度的新现象，这对于纳米电子行业以及当前和未来的应用至关重要。鉴于对传导聚合物纳米结构中机械应变和热传输之间的耦合以及成功实施这些材料对社会的科学和技术重要性缺乏了解，一项由聚合物加工/纳米制造专家组成的为期三年的多学科合作研究工作、纳米尺度的传输特性和实验纳米力学正在被提出。该研究将整合三个主要成分，即合成和纳米制造、实验和建模。拟议的研究将重点关注导电聚合物纳米结构的热性能和机械性能（耦合和非耦合）随温度的变化。将研究具有不同形状、尺寸、形态和孔隙率的聚苯胺纳米结构。聚合物纳米结构将使用湿法电聚合工艺进行纳米制造。新型测试装置的设计和开发将使聚苯胺纳米结构的机械和热耦合测量成为可能。这种纳米张力计装置基于对市售 Hysitron 三面压痕仪的新颖改进，并将与专用热探针相结合。该设备将在带有原位纳米操纵器的高分辨率扫描电子显微镜（SEM）内使用。将采用电子束诱导沉积（EBID）程序将纳米结构“纳米焊接”到探针尖端或微型器件上。将利用理论分析来补充实验结果并加深理解。需要强调的是，拟议的研究计划具有创新性和新颖性，并且需要大量的纳米制造、实验和建模挑战。它代表了与能量传输和实验力学界所采用的传统和当前技术的重大背离，用于研究微米和/或纳米级结构中的耦合热/机械行为。强大的学习和教学部分是研究目标的组成部分，将为本科生和研究生提供显着的教育提升，并将为 K-12 学生提供外展机会。这些学生将从该项目固有的多学科性质中受益匪浅。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参与之外，CWRU 还强烈鼓励本科生通过高级项目和/或实验室课程参与教师研究项目。将鼓励所有参与的学生参加全国会议。还将关注招收代表性不足的少数族裔学生。此外，PI 还将向“Nanopedia”贡献这项研究的重要内容，“Nanopedia”是 CWRU 目前正在开发的一种基于网络的广泛的纳米技术课程学习方法。该资源将向大学和 K-12 学生以及公众开放。