Zhang Heyou, Cadusch Jasper, Kinnear Calum, James Timothy, Roberts Ann, Mulvaney Paul
ARC Centre of Excellence in Exciton Science, School of Chemistry , University of Melbourne , Parkville , Victoria 3010 , Australia.
School of Physics , University of Melbourne , Parkville , Victoria 3010 , Australia.
ACS Nano. 2018 Aug 28;12(8):7529-7537. doi: 10.1021/acsnano.8b02932. Epub 2018 Jul 24.
A major goal of nanotechnology is the assembly of nanoscale building blocks into functional optical, electrical, or chemical devices. Many of these applications depend on an ability to optically or electrically address single nanoparticles. However, positioning large numbers of single nanocrystals with nanometer precision on a substrate for integration into solid-state devices remains a fundamental roadblock. Here, we report fast, scalable assembly of thousands of single nanoparticles using electrophoretic deposition. We demonstrate that gold nanospheres down to 30 nm in size and gold nanorods <100 nm in length can be assembled into predefined patterns on transparent conductive substrates within a few seconds. We find that rod orientation can be preserved during deposition. As proof of high fidelity scale-up, we have created centimeter scale patterns comprising more than 1 million gold nanorods.
纳米技术的一个主要目标是将纳米级构建块组装成功能性光学、电气或化学装置。这些应用中的许多都依赖于对单个纳米颗粒进行光学或电学寻址的能力。然而，将大量单纳米晶体以纳米精度定位在基板上以集成到固态器件中仍然是一个基本障碍。在此，我们报告了使用电泳沉积对数千个单个纳米颗粒进行快速、可扩展的组装。我们证明，尺寸低至30 nm的金纳米球和长度小于100 nm的金纳米棒可以在几秒钟内组装到透明导电基板上的预定义图案中。我们发现棒状取向在沉积过程中可以保留。作为高保真放大的证明，我们创建了包含超过100万个金纳米棒的厘米级图案。
