Directed Assembly of One-Dimensional Nanopeapod Structures through the Capture of Preformed Nanoparticles in Scrolled Nanosheets

通过捕获滚动纳米片中的预制纳米粒子来定向组装一维纳米豆荚结构

• 批准号: 1412670
• 负责人: John Wiley
• 金额: $ 40.5万
• 依托单位: University of New Orleans
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-09-01 至 2018-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1412670&HistoricalAwards=false
• 关键词: Directed; Assembly; Dimensional; Nanopeapod; Structures

John B. Wiley at the University of New Orleans is supported by an award from the Macromolecular, Supramolecular and Nanochemistry Program in the Division of Chemistry to investigate an unusual motif in chemical structures on the scale of nanometers (billionths of a meter). The ability to organize small scale objects (nanoobjects) into ordered arrays is important to the development of new technologies. In this project, new peapod-like structures are assembled from small spheres and very thin sheets. The materials are then studied in terms of methods of assembly, variations in composition, and physical properties. Such materials are of interest in that they could lead to important technological advances in a variety of areas including magnetics, electronics, photocatalysis, and drug delivery. Undergraduate and graduate students are involved in all aspects of the research component of this program, providing them with valuable training in the synthesis and characterization of new nanostructures as well as the presentation and publication of scientific data. There are also undergraduate students from France who come to work in the research group's laboratory, promoting chemistry at the international level. Finally, to help promote science in the New Orleans area, local high school students are involved in this research program each summer.The ability to form nanopeapod structures by the capture of nanoparticles in scrolled nanosheets offers a new approach to the assembly of 1-D nanostructures. This project focuses on those aspects of nanoparticle assembly and nanosheet scrolling specifically important to the formation of extended peapod nanostructures. The program involves a combination of synthesis/assembly, characterization, and mechanistic studies. The goals of this effort are to 1) better understand and control the assembly of nanopeapod structures, 2) utilize peapod assembly in directing the formation of intricate composites, 3) extend these efforts to other host materials known to form scrolls, and 4) examine the prospect of reversibility in these assembly processes. Understanding of the assembly process is being pursued through, for example, investigations of its size and shape selectivity. Other advances are being developed through property tuning (magnetic, optical and/or electronic) in mixed nanoparticle assemblies. While the earliest investigations of the group were based on hexaniobate nanosheets, new scroll components are being sought, including isostructural tantalates, layered perovskites, transition metal dichalcogenides and graphene. Reversibility in scrolling of these structures is being examined as part of a 'capture-release' concept in nanoassembly.

新奥尔良大学的约翰·B·威利得到了化学系高分子、超分子和纳米化学项目的支持，该奖项旨在研究纳米(十亿分之一米)尺度上的化学结构中的一个不寻常的主题。将小尺度物体(纳米物体)组织成有序阵列的能力对新技术的发展很重要。在这个项目中，新的豆荚状结构是由小球体和非常薄的薄片组装而成的。然后从组装方法、组成的变化和物理性能方面对材料进行研究。这类材料之所以令人感兴趣，是因为它们可以在各种领域带来重要的技术进步，包括磁学、电子学、光催化和药物输送。本科生和研究生参与该项目研究的各个方面，在新纳米结构的合成和表征以及科学数据的介绍和出版方面为他们提供宝贵的培训。还有来自法国的本科生来到研究组的实验室工作，在国际层面上推广化学。最后，为了帮助促进新奥尔良地区的科学，当地的高中生每年夏天都会参与这个研究项目。通过在卷曲的纳米薄片中捕获纳米颗粒来形成纳米豆荚结构的能力为组装一维纳米结构提供了一种新的方法。该项目侧重于纳米颗粒组装和纳米薄片滚动对形成扩展豆荚纳米结构特别重要的那些方面。该计划涉及合成/组装、表征和机械研究的组合。这项工作的目标是1)更好地了解和控制纳米豆荚结构的组装，2)利用豆荚组装来指导复杂复合材料的形成，3)将这些努力扩展到其他已知的形成卷轴的宿主材料，以及4)检查这些组装过程中的可逆性的前景。例如，通过对其尺寸和形状选择性的调查，正在寻求对组装过程的了解。通过混合纳米颗粒组件中的性质调节(磁、光和/或电)，正在开发其他进展。虽然该小组最早的研究是基于六硼酸盐纳米片，但正在寻找新的卷轴组件，包括等结构的钽酸盐、层状钙钛矿、过渡金属二卤化物和石墨烯。这些结构卷动的可逆性正在作为纳米组装的“捕获-释放”概念的一部分进行检查。