NanoSystem Research Institute, National Institute of Advanced Industrial Science and Technology, 1-1-1 Higashi, Tsukuba, Japan.
Small. 2011 Feb 18;7(4):506-13. doi: 10.1002/smll.201002072. Epub 2011 Jan 18.
The ability to control metal patterns at the micro- and nanoscales, along with the development of a simple fabrication method, is important to many applications in the fields of materials science, biological sensing, electronics, and photonics. Herein, a simple approach to fabricating gold micropatterns with controlled roughness is reported. In this approach, gold is evaporated onto a striped liquid micropattern formed on self-organized microwrinkles. Gold nanoribbons with higher roughness form on the liquid part of the substrate because the deposited gold atoms can diffuse, grow, and aggregate at the liquid-air interface, whereas flat gold films form on the solid part. The rough gold nanoribbons formed on the liquid can then be peeled off through contact with water. The extinction spectrum of the rough gold nanoribbons suggests characteristic surface-plasmon absorption. This shows the possibility of using rough gold nanoribbons with controlled shape in plasmonic technology.
能够在微纳尺度上控制金属图案，以及开发简单的制造方法，对于材料科学、生物传感、电子学和光子学等领域的许多应用都非常重要。本文报道了一种制造具有可控粗糙度的金微图案的简单方法。在这种方法中，金被蒸发到自组织微皱纹上形成的条纹状液体微图案上。由于沉积的金原子可以在液体-空气界面处扩散、生长和聚集，因此在基底的液体部分形成具有更高粗糙度的金纳米带，而在固体部分形成平坦的金膜。通过与水接触，可以将形成在液体上的粗糙金纳米带剥落。粗糙金纳米带的消光谱表明存在特征的表面等离子体吸收。这表明可以在等离子体技术中使用具有可控形状的粗糙金纳米带。
