Department of Chemistry and ‡Materials Science and Engineering Program, State University of New York at Binghamton , Binghamton, New York 13902, United States.
J Am Chem Soc. 2014 Jan 29;136(4):1352-9. doi: 10.1021/ja408250q. Epub 2014 Jan 15.
Self-organization of colloidal Pt nanocubes into two types of distinct ordered superlattices, simple-cubic and body-centered-tetragonal structures, has been achieved using a home-built setup. Detailed translational and orientational characteristics of these superstructures were determined using a transmission electron microscopy tomographic technique with 3D reconstruction analysis. The formation of these distinct superlattices is the result of a delicate choice of solvent (i.e., aliphatic hexane or aromatic toluene hydrocarbons), which serves as a dispersion medium to fine-tune the relative strengths of ligand-ligand and ligand-solvent interactions during the self-assembly process. This work provides important insights into the effects of ligand-solvent interactions on superlattice formation from nonspherical nanoparticles.
使用自行搭建的装置，实现了胶体 Pt 纳米立方体自组装成两种不同的有序超晶格，即简单立方和体心四方结构。使用透射电子显微镜断层扫描技术和 3D 重构分析，确定了这些超结构的详细平移和取向特征。这些不同超晶格的形成是溶剂（即脂肪族己烷或芳烃甲苯碳氢化合物）精细选择的结果，它作为分散介质，在自组装过程中微调配体-配体和配体-溶剂相互作用的相对强度。这项工作为了解配体-溶剂相互作用对非球形纳米颗粒形成超晶格的影响提供了重要的见解。
