发表机构
Seoul National University; Stanford University（首尔大学; 斯坦福大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究提出MIDAS方法，利用形貌敏感耗散力实现金纳米立方体的形状选择性自组装，通过控制基底粗糙度大规模制备二维和三维纳米颗粒结构，无需复杂修饰，模拟验证耗散力为关键参数。
AI 中文摘要
纳米颗粒的自组装是形成功能性纳米、微米和宏观结构的一种高效且简便的方法。然而，目前可用的方法在尺寸、形状和组成方面缺乏精度和可控性，存在重现性和可扩展性差的问题，并且需要复杂的步骤和昂贵的材料。在此，我们提出了一种均匀形貌诱导和耗散力引导的纳米颗粒表面组装（MIDAS）方法，使用金纳米立方体（AuNCs）。利用该方法，形貌敏感的耗散力触发具有均匀尺寸和形状的AuNCs的形状选择性絮凝和组装。重要的是，表面粗糙度可控的基底以高度特异性的方式驱动AuNC组装单层（二维AuNAMs）或三维AuNC组装多层（三维AuNAMs）的大规模形成，无需任何复杂的配体修饰或制备步骤。晶格气体建模和动力学蒙特卡洛模拟表明，耗散力是决定超晶体形貌的关键参数，并证实了实验发现。这项工作建立了一种通用的纳米颗粒组装机制，并展示了MIDAS策略在二维和三维纳米颗粒结构的可扩展制造和图案化方面的广泛适用性。
英文摘要
Self-assembling nanoparticles is a highly efficient and facile way to form functional nano-, micro- and macrostructures. However, currently available methods lack precision and controllability in size, shape and composition, suffer from poor reproducibility and scalability, and require complex steps and expensive materials. Here, we present the uniform morphology-induced and depletion force-directed nanoparticle assembly on surface (MIDAS) method with gold nanocubes (AuNCs). Using this approach, morphology-sensitive depletion forces trigger shape-selective flocculation and assembly of the AuNCs with uniform size and shape. Importantly, the surface roughness-controlled substrate drives the large-scale formation of AuNC-assembled monolayers (2D AuNAMs) or three-dimensional AuNC-assembled multilayers (3D AuNAMs) in a highly specific manner without any complex ligand modification or preparation steps. Lattice-gas modeling and kinetic Monte Carlo simulations show the depletion force is the key parameter determining supercrystal morphology and corroborate the experimental findings. This work establishes a generalizable nanoparticle assembly mechanism and demonstrates the broad applicability of the MIDAS strategy for scalable fabrication and patterning of 2D and 3D nanoparticle architectures.
Comments25 pages, 6 figures
