NIRT: Bottom Up Assembly of Metal and Semiconductor Nanowires: Fundamental Forces to Nanoelectronic Circuits

NIRT：金属和半导体纳米线的自下而上组装：纳米电子电路的基本力

• 批准号: 0303976
• 负责人: Darrell Velegol
• 金额: $ 100万
• 依托单位: Pennsylvania State Univ University Park
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-15 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0303976&HistoricalAwards=false
• 关键词: NIRT; Bottom; Up; Assembly; Metal

NIRT: Bottom Up Assembly of Metal and Semiconductor Nanowires: Fundamental Forces to Electronic CircuitsAbstractThis proposal was received in response to Nanoscale Science and Engineering initiative, NSF 02-148, category NIRT. The technical goal of this project is to enable bottom-up assembly of nanoparticles by controlling fundamental forces. Compared with top-down nanoparticle assembly, bottom-up assembly provides an inexpensive route to making bulk quantities of nanomaterials, including high-density nanoelectronics. Promising methods have been developed by one of the investigators to produce nanoassemblies using bead templating assembly and DNA-directed bead templating assembly. By engineering the fundamental forces (e.g., van der Waals, solvation, depletion), this proposal seeks to minimize undesired aggregation and control either nondeterministic or deterministic assembly. The principles of fundamental nanoparticle forces learned in this research will be tested in the construction of a functional logic circuit based on quantum mechanical ideas, and the same principles will provide a basis for scaling up production quantities of this circuit.The logic circuit to be built consists of hexagonal or square arrays of semiconductor nanowires (e.g., silicon, gallium arsenide), with metal (e.g., gold, platinum) gate wires. This project has five objectives. 1) Simple versions of the device will be built with larger wires at the Penn State Nanofab Facility, using electrofluidic techniques. This will enable development of circuit testing procedures required for later tests with the circuit built using directed assembly. 2) A non-deterministic bead templating technique will exploit physical forces (e.g., electrostatics, steric, solvation) to assemble from the bottom up various types of functional nanowires. Essential to this work is the screening of co-solvent/particle systems that aggregate uncontrollably, and this will benefit greatly from phase diagrams simulated with molecular level simulations. 3) Unique sphere-rod interparticle force measurements will synergize with molecular dynamics simulations to produce predictive models and heuristics that will be broadly applicable in stabilizing nanoparticle dispersions, for instance by minimizing van der Waals forces and maximizing the stabilizing solvation forces. 4) Bead templating with DNA-directed assembly will be combined with the heuristics from the third objective to guide assembly while preventing undesired particle interactions as the DNA links the nanowires in the desired configuration. The undesired aggregation has been a critical barrier to otherwise very promising techniques. In both subprojects 2 and 4, the circuits will contain chemical specificity that enables, for instance, metal-semiconductor junctions, facilitating objective 1, because the nanocircuits will need to connect to instrumentation large enough to take useful measurements.The broader impact resulting from this project will be improved public ability to make "nano" decisions through hands on experience. Nanotechnology has many new capabilities, some, which will be unfamiliar to even the technologically, educated public. It is imperative that the public have sufficient experience with nanotechnology to make ethical and voting decisions. In order that the public gain "hands on" experience with nanotechnology, we will conduct semi-annual workshop booths at the "Central Pennsylvania Festival of the Arts" in State College, Pennsylvania. This event attracts approximately 200 000 participants annually, providing an extremely public forum. The hypothesis to be tested is that as the public participates, their comfort in accepting the technology and voting on decisions will be enhanced.Another important activity will be to "teach teachers to teach nano", building the knowledge of State College Pennsylvania k-12 teachers using "research experience for teachers"-type programs to leverage our own expertise into local students and their parents. For this part of the course, summer lab work with local k-12 instructors will enable the development of interactive modules for use in the classroom.

NIRT：金属和半导体纳米线的自下而上组装：电子电路的基本力量摘要该提案是响应纳米科学和工程倡议，NSF 02 - 148，类别NIRT而收到的。 该项目的技术目标是通过控制基本力来实现纳米粒子的自下而上组装。与自上而下的纳米粒子组装相比，自下而上的组装提供了一种廉价的方法来制造大量的纳米材料，包括高密度的纳米电子器件。 研究人员之一已经开发出有前途的方法来使用珠模板组装和DNA指导的珠模板组装来产生纳米组装体。 通过设计基本力（例如，货车德瓦耳斯，溶剂化，耗尽），该建议寻求最小化不希望的聚集和控制非确定性或确定性组装。 本研究中了解到的基本纳米颗粒力的原理将在基于量子力学思想的功能逻辑电路的构建中进行测试，相同的原理将为扩大该电路的生产量提供基础。要构建的逻辑电路由六边形或正方形半导体纳米线阵列组成（例如，硅，砷化镓），与金属（例如，金、铂）栅极线。 该项目有五个目标。 1)该装置的简单版本将在宾夕法尼亚州立大学纳米工厂使用电流体技术用更大的电线制造。 这将使电路测试程序的发展所需的后续测试与电路建立使用定向组装。 2)非确定性珠模板技术将利用物理力（例如，静电、空间位阻、溶剂化）以自下而上组装各种类型的功能纳米线。 这项工作的关键是筛选不受控制地聚集的共溶剂/颗粒系统，这将大大受益于分子水平模拟的相图。 3)独特的球-棒颗粒间力测量将与分子动力学模拟协同作用，以产生预测模型和动力学，其将广泛适用于稳定纳米颗粒分散体，例如通过最小化货车德瓦尔斯力和最大化稳定溶剂化力。 4)具有DNA导向组装的珠模板化将与来自第三个目标的化学结合以引导组装，同时防止不期望的颗粒相互作用，因为DNA以期望的构型连接纳米线。 不期望的聚集已经成为否则非常有前途的技术的关键障碍。 在子项目2和4中，电路将包含化学特性，例如，使金属-半导体结，促进目标1，因为纳米电路将需要连接到足够大的仪器进行有用的测量，该项目产生的更广泛的影响将是提高公众通过实践经验做出"纳米"决定的能力。纳米技术有许多新的能力，有些甚至对受过技术教育的公众来说都是陌生的。 公众必须对纳米技术有足够的经验来做出道德和投票决定。 为了让公众获得纳米技术的“实践”经验，我们将在宾夕法尼亚州州立大学的“宾夕法尼亚州中部艺术节”上举办半年一次的工作坊摊位。 这项活动每年吸引大约20万人参加，提供了一个非常公开的论坛。 要测试的假设是，随着公众的参与，他们在接受技术和投票决定方面的舒适度将得到增强。另一个重要的活动将是“教教师教纳米”，建立宾夕法尼亚州立大学k-12教师的知识，使用“教师研究经验”类型的计划，利用我们自己的专业知识进入当地学生和他们的家长。 对于课程的这一部分，与当地k-12教师的暑期实验室工作将使互动模块的开发在课堂上使用。