纳米级单金刚石网络拓扑纹理的高分辨率三维成像。

IF 38.1 1区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Nature nanotechnology Pub Date : 2024-07-23 DOI:10.1038/s41565-024-01735-w
D. Karpov, K. Djeghdi, M. Holler, S. Narjes Abdollahi, K. Godlewska, C. Donnelly, T. Yuasa, H. Sai, U. B. Wiesner, B. D. Wilts, U. Steiner, M. Musya, S. Fukami, H. Ohno, I. Gunkel, A. Diaz, J. Llandro
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引用次数: 0

摘要

拓扑缺陷是一种扩展的晶格变形,对局部缺陷和退火都有很强的抵抗力,人们利用这种缺陷在软硬材料中设计出了新的特性。然而,人们对拓扑缺陷的形成动力学和纳米级三维结构知之甚少,这阻碍了它们在纳米制造中的应用。我们介绍了在从三嵌段三元共聚物晶体模板化成金的单金刚石网络(空间群 Fd 3 ¯ m)体积中制造一对拓扑缺陷的方法。利用 X 射线纳米层析技术,我们以 11.2 纳米的空间分辨率解析了近 70,000 个单个单金刚石单元格的三维结构,从而分析了网络的长程有序性。观察到的缺陷在形态上类似于液晶中观察到的彗星和三叶草图案,这些图案的拓扑电荷相等且相反,为半整数。然而,我们对网络应变的分析表明,这是典型的硬物质行为。我们的分析方法不需要先验地了解三维纳米结构系统中节点的预期位置,因此可以识别大型样品中的扭曲形态和缺陷。
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High-resolution three-dimensional imaging of topological textures in nanoscale single-diamond networks
Topological defects—extended lattice deformations that are robust against local defects and annealing—have been exploited to engineer novel properties in both hard and soft materials. Yet, their formation kinetics and nanoscale three-dimensional structure are poorly understood, impeding their benefits for nanofabrication. We describe the fabrication of a pair of topological defects in the volume of a single-diamond network (space group Fd $$\bar{3}$$ m) templated into gold from a triblock terpolymer crystal. Using X-ray nanotomography, we resolve the three-dimensional structure of nearly 70,000 individual single-diamond unit cells with a spatial resolution of 11.2 nm, allowing analysis of the long-range order of the network. The defects observed morphologically resemble the comet and trefoil patterns of equal and opposite half-integer topological charges observed in liquid crystals. Yet our analysis of strain in the network suggests typical hard matter behaviour. Our analysis approach does not require a priori knowledge of the expected positions of the nodes in three-dimensional nanostructured systems, allowing the identification of distorted morphologies and defects in large samples. Large-volume high-resolution X-ray nanotomography is used to identify topological defects emerging in a self-assembled triblock terpolymer single-diamond network.
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来源期刊
Nature nanotechnology
Nature nanotechnology 工程技术-材料科学:综合
CiteScore
59.70
自引率
0.80%
发文量
196
审稿时长
4-8 weeks
期刊介绍: Nature Nanotechnology is a prestigious journal that publishes high-quality papers in various areas of nanoscience and nanotechnology. The journal focuses on the design, characterization, and production of structures, devices, and systems that manipulate and control materials at atomic, molecular, and macromolecular scales. It encompasses both bottom-up and top-down approaches, as well as their combinations. Furthermore, Nature Nanotechnology fosters the exchange of ideas among researchers from diverse disciplines such as chemistry, physics, material science, biomedical research, engineering, and more. It promotes collaboration at the forefront of this multidisciplinary field. The journal covers a wide range of topics, from fundamental research in physics, chemistry, and biology, including computational work and simulations, to the development of innovative devices and technologies for various industrial sectors such as information technology, medicine, manufacturing, high-performance materials, energy, and environmental technologies. It includes coverage of organic, inorganic, and hybrid materials.
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