SI NANOWIRE

这个子项目是许多研究子项目中利用 资源由NIH/NCRR资助的中心拨款提供。子项目和 调查员(PI)可能从NIH的另一个来源获得了主要资金， 并因此可以在其他清晰的条目中表示。列出的机构是 该中心不一定是调查人员的机构。 新材料的开发可以使科学技术取得革命性的进步，而不是进化的进步。我们的团队致力于发现和开发新的纳米结构，重点是以原子的精度在不同的长度尺度上控制形貌、尺寸、结构、成分和掺杂，因为这些将定义并能够控制物理性质。特别强调的是开发调制纳米级导线，它提供了任何纳米系统所需的双重功能、设备特性和互连。 我们最近展示了一种概念性的“纳米构造”合成方法的元素，该方法使用扭结的半导体纳米线(我们的样本)控制地精化二维(2D)单晶超结构。我们定义并表征了作为纳米线系统中新型立体声调制基础的单晶“次级建筑单元”。该单元由两个臂组成，每个臂具有一致的生长方向和明确的大小，一个三角形关节和固定的120度桥接角。 我们想用3D断层摄影术来描述我们的纳米线的特性。特别是，我们想知道在这种扭结形成过程中晶面是如何演化的，以及在不同位置的STEM截面。你现在拥有的样品是一种缠绕在一起的纳米线的IPA溶液，你可以将纳米线沉积在合适的透射电子显微镜衬底上。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. The development of new materials can enable revolutionary versus evolutionary advances in science and technology. Our group is committed to the discovery and development of new nanoscale structures with an emphasis on controlling at different length scales with atomic precision the morphology, size, structure, composition and doping, since these will define and enable control over physical properties. Particular emphasis is being placed on developing modulated nanoscale wires, which provide dual functionality  a device property and an interconnection  required in any nanosystem. We recently demonstrated elements of a conceptual 'nanotectonic' synthesis approach for controlled elaboration of a two dimensional (2D) single crystalline superstructure using kinked semiconductor nanowires (our sample). We define and characterize a single crystalline 'secondary building unit' which serves as the basis of the novel stereo-modulation in nanowire systems. This unit consists of two arms, each with coherent growth direction and well defined size, one triangular joint, and a fixed 120 degree bridging angle. We want to characterize our kinked nanowire using 3D tomography. In particular, we want to know how the crystal facets evolve during the formation of such kinks, and the STEM cross-sections at different positions. The sample you have now is a IPA solution of kinked nanowires, and you can deposit the nanowires on appropriate TEM substrates.