SGER: Shape-Dependent, Selective Self-Assembly for Nanomanufacturing

SGER：用于纳米制造的形状相关、选择性自组装

• 批准号: 0422022
• 负责人: Carol Livermore
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-15 至 2006-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0422022&HistoricalAwards=false
• 关键词: SGER; Shape; Dependent; Selective; Self

This project will provide an initial demonstration and characterization of techniques to manufacture complex systems of nanocomponents rapidly, effectively, and inexpensively to meet a wide array of future nanomanufacturing needs. The proposed technique uses geometrically-selective self-assembly from fluid to organize nanoscale components precisely into arbitrary, pre-determined, non-periodic systems. The technology will enable the creation of integrated nanosystems from separately fabricated functional nanocomponents in the 10 nm to greater than 1 mm size range. The substrate is patterned so that its topography at a given location is the exact inverse of the shape of the desired component at that location. Both substrate and components are chemically functionalized with a blanket coating of a hydrophobic self-assembled monolayer (SAM) to promote component-substrate attachment. The components and substrate are immersed in an appropriate fluid; components then contact the substrate randomly and stick. Because component-substrate binding energy scales with contact area, components attach much more strongly in shape-matched holes than on non-shape-matched surfaces. Megasonic excitation selectively dislodges the incorrectly-placed, more weakly-bound components while retaining the correctly placed, more strongly-bound components. Random contact and selective removal occur simultaneously, and the assembled configuration approaches the desired configuration. The benefits of this approach include high positioning precision, simultaneous and selective assembly of diverse nanostructures, and a means of avoiding layer-to-layer alignment steps. The project has three primary goals. First is to characterize assembly yield and defect density vs. assembly time, megasonic excitation strength, hydrophobicity, and quality of particle/hole match using 1 mm-scale particles. Second is to demonstrate repeatable self-assembly into lithographically-defined shape-matched binding sites. Third is to relate the measured assembly yields to differences in binding energy in order to identify limits on selectivity and component size. Creating rapid, effective, widely-applicable nanomanufacturing technologies such as the one described here is important. There is a vast amount of existing research on nanocomponents, but more research on incorporating such nanocomponents into larger systems will be needed to convert them into practical systems and new products. Such systems could range from single electronics to physical, chemical, and biological sensors.

该项目将提供技术的初步演示和表征，以快速，有效和廉价地制造复杂的纳米组件系统，以满足未来广泛的纳米制造需求。 该技术利用流体的几何选择性自组装，将纳米级组件精确地组织成任意的、预定的、非周期性的系统。 该技术将能够从10 nm到大于1 mm尺寸范围内的单独制造的功能纳米组件创建集成纳米系统。 衬底被图案化，使得其在给定位置处的形貌与该位置处的期望部件的形状完全相反。基板和组件均通过疏水自组装单层（SAM）的覆盖涂层进行化学功能化，以促进组件-基板附着。 将组件和基板浸入适当的流体中;然后组件随机接触基板并粘附。 因为元件-基底结合能与接触面积成比例，元件在形状匹配的孔中比在非形状匹配的表面上更牢固地附着。 兆频超声波激发选择性地去除不正确放置的、较弱结合的组分，同时保留正确放置的、较强结合的组分。 随机接触和选择性去除同时发生，并且组装的构型接近期望的构型。 这种方法的好处包括高定位精度，不同的纳米结构的同时和选择性的组装，以及避免层到层的对齐步骤的手段。 该项目有三个主要目标。 首先是表征组装产量和缺陷密度与组装时间、兆频超声波激发强度、疏水性和使用1 mm尺度颗粒的颗粒/孔匹配的质量。 第二是证明可重复的自组装成光刻定义的形状匹配的结合位点。 第三是将测得的组装产率与结合能的差异相关联，以确定选择性和组件尺寸的限制。 创造快速，有效，广泛适用的纳米制造技术，如这里所描述的是重要的。 目前有大量关于纳米元件的研究，但需要更多关于将这些纳米元件纳入更大系统的研究，以将其转化为实用系统和新产品。 这种系统可以从单个电子设备到物理，化学和生物传感器。