School of Materials Science and Engineering, Nanyang Technological University , 50 Nanyang Avenue, Singapore 639798, Singapore.
J Am Chem Soc. 2015 Feb 4;137(4):1444-7. doi: 10.1021/ja513120u. Epub 2015 Jan 26.
Assembly of noble metal nanocrystals into free-standing two-dimensional (2D) nanostructures with a regular shape is still a challenge. Here we report the preparation of a novel 2D AuAg nanosheet with length of 1.50 ± 0.30 μm, width of 510 ± 160 nm, and thickness of ∼100 nm via the assembly of ultrathin AuAg nanowires in the presence of the triblock copolymer Pluronic P123. The self-assembly of P123 and the fusion behavior of the nanowires during the assembly process are the key reasons for the formation of AuAg nanosheets in P123. Furthermore, the obtained AuAg nanosheet@P123 is used as the active material in a memory device that exhibits the write-once-read-many-times memory behavior.
将贵金属纳米晶组装成具有规则形状的独立二维（2D）纳米结构仍然是一个挑战。在这里，我们报告了一种新型的二维 AuAg 纳米片的制备方法，该纳米片的长度为 1.50±0.30μm，宽度为 510±160nm，厚度约为 100nm，是通过在三嵌段共聚物 Pluronic P123 的存在下组装超薄 AuAg 纳米线而得到的。P123 的自组装和纳米线在组装过程中的融合行为是形成 P123 中 AuAg 纳米片的关键原因。此外，所得到的 AuAg 纳米片@P123 被用作记忆器件中的活性材料，该器件表现出一次写入多次读取的记忆行为。
