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首页> 外文期刊>Nanotechnology >Electrostatic entrapment of chloroaurate ions in patterned lipid films and the in situ formation of gold nanoparticles
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Electrostatic entrapment of chloroaurate ions in patterned lipid films and the in situ formation of gold nanoparticles

机译：图案化脂质膜中氯金酸盐离子的静电俘获和金纳米颗粒的原位形成

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摘要

The formation of gold nanoparticle assemblies in a patterned manner on suitable substrates is described. The protocol for realizing such structures comprises the following steps. In the first step, patterned films of a fatty amine are thermally evaporated onto solid supports using suitable masks (e.g. a TEM grid). Thereafter, the fatty amine film is immersed in chloroauric acid solution and chloroaurate (AuCl_4~-) ions entrapped in the lipid matrix by electrostatic complexation with the ammonium ions of the fatty amine molecules. The final step involves the reduction of the AuCl_4~- ions in situ thus leading to the formation of gold nanoparticles within the patterned lipid matrix. The process of metal ion incorporation and reduction may be repeated a number of times to increase the nanoparticle density in the lipid matrix. AuCl_4~- ion entrapment and formation of gold nanoparticles within the patterned lipid matrix has been followed by quartz crystal microgravimetry, UV-vis spectroscopy, Fourier transform infrared spectroscopy, scanning electron microscopy and energy dispersive analysis of x-ray measurements. The protocol described shows immense potential for extension to assemblies of nanoparticles in more intricate patterns as well as to the growth of semiconductor quantum dots in such patterns.
机译：描述了在合适的基底上以图案化方式形成金纳米颗粒组件的方法。用于实现这种结构的协议包括以下步骤。在第一步中，使用合适的掩模（例如TEM网格）将脂肪胺的图案化膜热蒸发到固体载体上。此后，将脂肪胺膜浸入氯金酸溶液中，并通过与脂肪胺分子的铵离子进行静电络合将氯金酸根离子（AuCl 4-）截留在脂质基质中。最后一步涉及原位还原AuCl_4-离子，从而导致在图案化脂质基质中形成金纳米颗粒。金属离子结合和还原的过程可以重复多次以增加脂质基质中的纳米颗粒密度。在图案化的脂质基质中AuCl 4-离子的俘获和金纳米颗粒的形成随后是石英晶体微重力法，UV-可见光谱，傅里叶变换红外光谱，扫描电子显微镜和x射线测量的能量色散分析。所描述的协议显示出以更复杂的图案扩展到纳米粒子组装体以及在这种图案中生长半导体量子点的巨大潜力。

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