Université Pierre et Marie Curie and Centre National de la Recherche Scientifique, UMR 7070, LM2N, 4 Place Jussieu, 75005 Paris, France.
J Am Chem Soc. 2012 Feb 29;134(8):3714-9. doi: 10.1021/ja207941p. Epub 2012 Feb 13.
Natural systems give the route to design periodic arrangements with mesoscopic architecture using individual nanocrystals as building blocks forming colloidal crystals or supracrystals. The collective properties of such supracrystals are one of the main driving forces in materials research for the 21st century with potential applications in electronics or biomedical environments. Here we describe two simultaneous supracrystal growth processes from gold nanocrystal suspension, taking place in solution and at the air-liquid interface. Furthermore, the growth processes involve the crystallinity selection of nanocrystals and induce marked changes in the supracrystal mechanical properties.
自然系统为使用个体纳米晶体作为构建块形成胶体晶体或超晶体来设计具有介观结构的周期性排列提供了途径。这种超晶体的集体性质是 21 世纪材料研究的主要驱动力之一，在电子学或生物医学环境中有潜在的应用。在这里，我们描述了两个同时从金纳米晶体悬浮液中发生的超晶体生长过程，一个发生在溶液中，另一个发生在气-液界面。此外，生长过程涉及纳米晶体的结晶度选择，并导致超晶体机械性能的显著变化。
