近日，复旦大学董安钢团队实现了单粒包封纳米晶体作为增强机械性能的氢键超晶格的通用构件。该研究于2025年10月27日发表在《美国化学会志》上。

研究组提出了一种构建机械机器人超晶格的通用策略，使用单颗粒封装纳米晶体（MENCs）作为构建块。MENCs是通过将单个纳米晶体封装在聚苯乙烯-共马来酸酐胶束中，由苯乙烯片段和天然表面配体之间的疏水相互作用驱动而产生的。顺丁烯二酸酐部分同时水解产生羧基，羧基建立了束内氢键（H键），稳定了MENCs在水中的分散。

溶剂蒸发后，MENCs自组装成长程有序的三维超晶格。至关重要的是，组装后胶束间的氢键自发地将相邻的MENCs连接成一个连续的交联结构。这种双能级氢键赋予了特殊的结构内聚力，产生了弹性模量高达18.73 GPa的超晶格，远远超过了由范德华或氢键相互作用稳定的传统超晶格。

附：英文原文

Title: Monomicelle-Encapsulated Nanocrystals as Versatile Building Blocks for Hydrogen-Bonded Superlattices with Enhanced Mechanical Properties

Author: Zhebin Zhang, Siyu Wan, Yifan Gao, Xuanyu Lyu, Yutong Gao, Ning Ding, Ziyue Zheng, Dong Yang, Tongtao Li, Angang Dong

Issue&Volume: October 27, 2025

Abstract: We present a general strategy for constructing mechanically robust superlattices using monomicelle-encapsulated nanocrystals (MENCs) as building blocks. MENCs are created by encapsulating individual nanocrystals within micelles of poly(styrene-co-maleic anhydride), driven by hydrophobic interactions between styrene segments and native surface ligands. Concurrent hydrolysis of maleic anhydride moieties generates carboxyl groups that establish intramicelle hydrogen bonds (H-bonds), stabilizing MENCs in aqueous dispersion. Upon solvent evaporation, MENCs self-assemble into long-range-ordered, three-dimensional superlattices. Crucially, postassembly intermicelle H-bonding spontaneously fuses adjacent MENCs into a continuous, cross-linked architecture. This dual-level H-bonding imparts exceptional structural cohesion, yielding superlattices with elastic moduli of up to 18.73 GPa, far exceeding conventional superlattices stabilized by van der Waals or H-bonding interactions.

DOI: 10.1021/jacs.5c09642

Source: https://pubs.acs.org/doi/abs/10.1021/jacs.5c09642