Paczesny Jan, Sozański Krzysztof, Dzięcielewski Igor, Zywociński Andrzej, Hołyst Robert
J Nanopart Res. 2012 Mar;14(4):826. doi: 10.1007/s11051-012-0826-4. Epub 2012 Mar 31.
Controlled patterning and formation of nanostructures on surfaces based on self-assembly is a promising area in the field of "bottom-up" nanomaterial engineering. We report formation of net-like structures of gold nanoparticles (Au NPs) in a matrix of liquid crystalline amphiphile 4'-n-octyl-4-cyanobiphenyl at the air-water interface. After initial compression to at least 18 mN m(-1), decompression of a Langmuir film of a mixture containing both components results in formation of net-like structures. The average size of a unit cell of the net is easily adjustable by changing the surface pressure during the decompression of the film. The net-like patterns of different, desired average unit cell areas were transferred onto solid substrates (Langmuir-Blodgett method) and investigated with scanning electron microscopy and X-ray reflectivity (XRR). Uniform coverage over large areas was proved. XRR data revealed lifting of the Au NPs from the surface during the formation of the film. A molecular mechanism of formation of the net-like structures is discussed. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (doi:10.1007/s11051-012-0826-4) contains supplementary material, which is available to authorized users.
基于自组装在表面上进行纳米结构的可控图案化和形成是“自下而上”纳米材料工程领域中一个很有前景的领域。我们报道了在空气-水界面处，金纳米颗粒（Au NPs）在液晶两亲物4'-正辛基-4-氰基联苯的基质中形成网状结构。在最初压缩至至少18 mN m⁻¹后，对包含两种成分的混合物的朗缪尔膜进行减压，会导致网状结构的形成。通过在膜减压过程中改变表面压力，可以轻松调节网的晶胞平均尺寸。将不同的、所需平均晶胞面积的网状图案转移到固体基板上（朗缪尔-布洛杰特法），并用扫描电子显微镜和X射线反射率（XRR）进行研究。证明了大面积的均匀覆盖。XRR数据显示在膜形成过程中Au NPs从表面抬起。讨论了网状结构形成的分子机制。电子补充材料：本文的在线版本（doi:10.1007/s11051-012-0826-4）包含补充材料，授权用户可以使用。
