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

约翰B.新奥尔良大学的Wiley得到了化学系大分子，超分子和纳米化学计划的支持，以研究纳米（十亿分之一米）尺度上化学结构中的一种不寻常的基序。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非常重要。 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。然后研究材料的组装方法，成分变化和物理特性。 这种材料的兴趣在于它们可以在包括磁性、电子、磁性和药物递送在内的各种领域中导致重要的技术进步。本科生和研究生参与该计划研究部分的各个方面，为他们提供新纳米结构的合成和表征以及科学数据的展示和出版方面的宝贵培训。也有来自法国的本科生来到研究小组的实验室工作，促进化学在国际上的发展。最后，为了帮助在新奥尔良地区推广科学，当地高中生每年夏天都会参与到这个研究项目中来。通过将纳米颗粒捕获在滚动的纳米片中而形成纳米豆荚结构的能力为1-D纳米结构的组装提供了一种新的方法。 这个项目的重点是纳米粒子组装和纳米片滚动特别重要的扩展peapod纳米结构的形成方面。 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）更好地理解和控制纳米豆荚结构的组装，2）利用豆荚组装指导复杂复合材料的形成，3）将这些努力扩展到已知形成卷轴的其他主体材料，以及4）检查这些组装过程中可逆性的前景。 对组装过程的理解正在通过例如对其尺寸和形状选择性的调查来进行。 其他进展正在通过在混合纳米颗粒组件中的性质调整（磁性、光学和/或电子）来开发。 虽然该小组最早的研究是基于六铌酸盐纳米片，但正在寻找新的卷轴组件，包括同构钽酸盐，层状钙钛矿，过渡金属二硫属化物和石墨烯。 这些结构滚动的可逆性正在被研究，作为纳米组装中“捕获-释放”概念的一部分。

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.