Molecular Interfaces to Heterostructures of Low Dimensional Carbon

低维碳异质结构的分子界面

• 批准号: 0905175
• 负责人: Moonsub Shim
• 金额: $ 37.52万
• 依托单位: University of Illinois at Urbana-Champaign
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-07-01 至 2013-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0905175&HistoricalAwards=false
• 关键词: Molecular; Interfaces; Heterostructures; Low; Dimensional

Technical: Doping and carrier scattering are of fundamental importance to materials being considered for electronics and sensor application. The ability to synthesize and fabricate materials of reduced dimensionality has provided new platforms with which established performance limits can be surpassed. When materials are of atomic thickness, as is the case with graphene and carbon nanotubes, they also represent the ultimate limit in terms of sensitivity to the local chemical environment. Hence, while much potential exists, experimentally observed properties can be and often are altered by the environment. This project, supported by the Electronic and Photonic Materials (EPM) Program and Solid State and Materials Chemistry (SSMC) Program, addresses the effects of ambient surrounding and interfaces on the observed properties of low-dimensional carbon (graphene and nanotubes) - to distinguish intrinsic characteristics and to elucidate how extrinsic factors alter them. Studies on interactions with substrates can also lead to systems where the effects of mechanical strain can be explored. Successful implementation of this project is expected to lead to new insights into mechanical distortions and Kohn anomaly effects that lead to static and dynamic band gap opening in graphene and metallic carbon nanotubes.Non-technical: The project addresses basic research issues in a topical area of materials sciences with high technological relevance. Insights gained on chemical and mechanical effects at the low-dimensional carbon/polymer interfaces will enable emerging areas such as flexible electronics and transparent conductors. Studies on strained crystalline interfaces and mechanical effects may lead to accessible routes to tuning the band structure of both graphene and nanotubes opening up new directions in carbon-based high-performance electronics. The interdisciplinary nature of this project provides educational and training opportunities for both graduate and undergraduate researchers who will become the future leaders at the forefront of science and engineering. The results of this project also provide new concepts and demonstration materials for enriching course curricula at the PI's institution and beyond.

技术：掺杂和载流子散射对于电子和传感器应用所考虑的材料至关重要。合成和制造降维材料的能力提供了新的平台，可以超越既定的性能限制。当材料具有原子厚度时，如石墨烯和碳纳米管的情况，它们也代表了对局部化学环境敏感性的极限。因此，虽然存在很大的潜力，但实验观察到的性质可以并且经常被环境改变。该项目由电子和光子材料计划（Electronic and Photonic Materials Program）和固态和材料化学计划（Solid State and Materials Chemistry Program）支持，解决了环境和界面对低维碳（石墨烯和纳米管）观察到的特性的影响-以区分内在特性并阐明外在因素如何改变它们。与基板的相互作用的研究也可以导致系统中的机械应变的影响，可以探索。该项目的成功实施有望对石墨烯和金属碳纳米管中的机械扭曲和Kohn异常效应产生新的见解，从而导致静态和动态带隙开放。非技术性：该项目解决了材料科学领域的基础研究问题，具有高度的技术相关性。在低维碳/聚合物界面上获得的化学和机械效应的见解将使柔性电子和透明导体等新兴领域成为可能。对应变晶体界面和机械效应的研究可能会导致调整石墨烯和纳米管的能带结构的途径，从而为碳基高性能电子产品开辟新的方向。该项目的跨学科性质为研究生和本科生研究人员提供了教育和培训机会，他们将成为科学和工程前沿的未来领导者。该项目的成果还为丰富PI机构内外的课程提供了新的概念和演示材料。