Fundamental Investigation and Development of Screw Dislocation-Driven Nanowire Growth

螺旋位错驱动纳米线生长的基础研究和发展

• 批准号: 1106184
• 负责人: Song Jin
• 金额: $ 39.7万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2011
• 资助国家: 美国
• 起止时间: 2011-07-01 至 2015-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1106184&HistoricalAwards=false
• 关键词: Fundamental; Investigation; Development; Screw; Dislocation

TECHNICAL SUMMARY:This project supported by Solid State and Materials Chemistry Program seeks to develop the rational design and synthesis of one-dimensional (1D) nanowire materials whose growth is driven by screw dislocations and to investigate their fundamental characteristics. Nanowires and other 1D nanomaterials possess interesting properties that have already found many applications in nanoelectronics, nanophotonics, solar energy conversion, thermoelectrics, and energy storage. Professor Song Jin and his students had discovered a nanowire growth mechanism completely different from the traditional metal-catalyzed nanowire growth, in which axial screw dislocations drive the anisotropic 1D crystal growth and enable the formation of 1D nanostructures. Bridging classical crystal growth theories with modern nanomaterial synthesis, this project focuses on the fundamental investigation and development of screw dislocation-driven nanowire growth to extend its generality among diverse materials, demonstrate the versatility in creating more complex nanostructures, scale up the solution catalyst-free growth of nanowires, and understand the physical properties of dislocation-driven nanowires. This understanding will create a new dimension in the rational design and synthesis of 1D nanomaterials and enable exploitation of a catalyst-free growth mechanism for large scale/low cost solution growth of 1D nanomaterials for diverse applications. NON-TECHNICAL SUMMARY:Nanowires and other one-dimensional (1D) nanomaterials have significant applications in nanoelectronics, nanophotonics, solar energy conversion, thermoelectrics, and energy storage. Professor Song Jin and his students had discovered a different way of synthesizing nanowire materials that are driven by screw dislocation defects. This new mechanism of nanowire growth will be studied and further developed so that its significant advantages can be rationally exploited to open up a new dimension in the synthesis of 1D nanomaterials, especially for large scale and low cost solution growth. The proposed research can potentially have transformative impacts on the rational synthesis of 1D nanomaterials that will enable a variety of large scale applications of these materials, such as in renewable energy. Furthermore, education and outreach will be integrated with active research in this project by recruiting underrepresented undergraduate students to participate in nanomaterial research, by developing new modules for a web course on nanoscience and nanotechnology, and by further developing a nanoscience workshop for high school students and teachers.

技术概要：该项目由固态和材料化学计划支持，旨在开发由螺旋位错驱动生长的一维（1D）纳米线材料的合理设计和合成，并研究其基本特性。纳米线和其他一维纳米材料具有有趣的特性，已经在纳米电子学，纳米光子学，太阳能转换，热电和能量存储中找到了许多应用。宋进教授和他的学生们发现了一种与传统金属催化纳米线生长完全不同的纳米线生长机制，其中轴向螺旋位错驱动各向异性的一维晶体生长，并使一维纳米结构的形成成为可能。该项目将经典晶体生长理论与现代纳米材料合成相结合，重点关注螺旋位错驱动纳米线生长的基础研究和发展，以扩展其在不同材料中的通用性，展示创建更复杂纳米结构的多功能性，扩大纳米线的无催化剂溶液生长，并了解位错驱动纳米线的物理特性。这种理解将在1D纳米材料的合理设计和合成中创造一个新的维度，并能够利用无催化剂的生长机制，用于1D纳米材料的大规模/低成本溶液生长，以用于各种应用。纳米线和其他一维（1D）纳米材料在纳米电子学、纳米光子学、太阳能转换、热电学和能量存储方面有着重要的应用。宋进教授和他的学生们发现了一种不同的方法来合成由螺旋位错缺陷驱动的纳米线材料。这种纳米线生长的新机制将被研究和进一步发展，以便其显着的优势可以合理地利用，开辟了一个新的维度，在一维纳米材料的合成，特别是大规模和低成本的解决方案的增长。拟议的研究可能对一维纳米材料的合理合成产生变革性影响，这将使这些材料的各种大规模应用成为可能，例如在可再生能源中。此外，教育和推广将与积极的研究在这个项目中，通过招募代表性不足的本科生参加纳米材料研究，通过开发新的模块，纳米科学和纳米技术的网络课程，并通过进一步开发一个高中学生和教师的纳米科学研讨会。