Nanoscale Examination of Electronic States in Molecular and Atomic Wires

该项目使用原子级工程来生产用于研究一维电子态的材料。 由于它们的简单性和均匀性，碳纳米管和相关的纳米豆荚结构为受控实验提供了独特的优势。 其他一维结构是基于原子线，通过原子吸附物的自组装或通过直接操纵表面上的单个原子来制造。 扫描隧道显微镜（STM）将用于直接可视化，并在单个原子和分子的尺度上局部表征和修改物质。 电子状态将被研究，以解决与分子和原子尺度的电子器件的发展相关的问题。 详细的结构和输运研究将有助于开发更准确的理论模型，以了解复杂耦合系统中电子之间的相关性的一般问题。 该项目将纳米科学的技术相关研究与凝聚态物理学前沿的基本问题的调查相结合。 在纳米结构的基本电子特性能够被可重复地测量和理解之前，基于分子的电子、生物或化学器件的应用将不会实现。 该项目将研究和教育结合在一起，包括对进行实验的学生进行技术培训，开发纳米电子学的本科课程，以及向未来的学生和公众介绍纳米科学和技术。该项目将研究新型导线的电子特性，即所谓的单壁纳米管（SWNT），这种导线非常小，需要40，000个，000个并排放置在一角硬币上。 在这种微小的导线中，电子被迫基本上沿着一个方向流动，仅仅是一维的。 在普通的电线中，电子实际上在三个方向上移动，而在电池端子之间则在一个方向上漂移。 单壁碳纳米管是自组织的，生长在表面上，使其电子性质是实验研究。 理解和操纵这些微小结构的电子态可能会促进纳米技术的技术进步，并提供对相关电子系统奇异性质的基本理解。 在物理学、材料科学和纳米技术的交叉点上开发的尖端实验技术应该为未来几代电子设备或生物传感器提供基础。 该项目整合了研究和教育，在进行实验的学生的技术培训，在纳米电子学本科课程的发展，并在纳米科学和技术的推广介绍给未来的学生和公众。

This project uses atomic-scale engineering to produces materials for the study of one-dimensional electronic states. Because of their simplicity and uniformity, carbon nanotubes and related nanoscopic peapod structures offer unique advantages for controlled experiments. Other one-dimensional structures are based on atomic wires fabricated by self-assembly of atomic adsorbates or by direct manipulation of single atoms on a surface. Scanning tunneling microscopy (STM) will be used to directly visualize, and locally characterize and modify matter on the scale of single atoms and molecules. The electronic states will be studied in order to address issues relevant to the development of molecular and atomic-scale electronic devices. The detailed structural and transport studies will help develop more accurate theoretical models needed to understand the general problem of correlation among electrons in complex coupled systems. The project combines technologically relevant research in nanoscale science with investigations of fundamental problems at the forefront of condensed matter physics. Until the basic electronic properties of nanostructures can be reproducibly measured and understood, applications will not be realized for molecule-based electronic, biological, or chemical devices. The project integrates research and education-in the technical training of students who carry out the experiments, in the development of a undergraduate curricula in nanoelectronics, and in outreach presentations of nanoscience and technology to future students and the general public.The project will investigate the electronic properties of novel wires, so-called single-walled-nanotubes (SWNTs), that are so small that it would take 40,000,000 laying side-by-side to span a dime. In such tiny wires, the electrons are forced to flow in essentially one direction, in one-dimension only. In ordinary wires, electrons actually move in three directions, while drifting in a single direction between battery terminals. The SWNTs are be self-organized and grown on surfaces so that their electronic properties are accessible for experimental studies. Understanding and manipulating the electronic states of these tiny structures may enable technological advances in nanotechnology and provide fundamental understanding of the exotic nature of correlated electron systems. Cutting-edge experimental techniques developed at the intersection of physics, materials science, and nanotechnology should provide the building blocks for future generations of electronic devices or biosensors. The project integrates research and education-in the technical training of students who carry out the experiments, in the development of a undergraduate curricula in nanoelectronics, and in outreach presentations of nanoscience and technology to future students and the general public.