Cavendish Laboratory, University of Cambridge, J.J. Thomson Avenue, Cambridge CB3 0HE, UK.
Langmuir. 2012 Jan 17;28(2):1347-50. doi: 10.1021/la204299h. Epub 2011 Dec 16.
Templating against atomically flat materials allows creation of smooth metallic surfaces. The process of adding the backing (superstrate) to the deposited metals has proven to be the most difficult part in producing reliable, large-area, solvent-resistant substrates and has been the subject of recent research. In this paper we describe a simple and inexpensive liquid glass template-stripping (lgTS) method for the fabrication of large area ultraflat gold surfaces. Using our lgTS method, ultraflat gold surfaces with normals aligned along the <111> crystal plane and with a root-mean-square roughness of 0.275 nm (over 1 μm(2)) were created. The surfaces are fabricated on silica-based substrates which are highly solvent resistant and electrically insulating using silicate precursor solution (commonly known as "liquid glass") and concomitant mild heat treatment. We demonstrate the capabilities of such ultraflat gold surfaces by imaging nanoscale objects on top and fabricating microelectrodes as an example application. Because of the simplicity and versatility of the fabrication process, lgTS will have wide-ranging application in imaging, catalysis, electrochemistry, and surface science.
对原子级平坦材料进行构图可制造出光滑的金属表面。在沉积金属后添加基底（上覆层）的过程已被证明是制造可靠、大面积、耐溶剂基底最困难的部分，也是近期研究的主题。在本文中，我们描述了一种简单且廉价的液态玻璃模板剥离（lgTS）方法，用于制造大面积超平整金表面。使用我们的 lgTS 方法，可制造出法线沿 <111> 晶面排列且均方根粗糙度为 0.275nm（超过 1μm²）的超平整金表面。使用硅酸盐前体溶液（俗称“液态玻璃”）和温和的热处理，在高度耐溶剂和电绝缘的基于二氧化硅的基底上制造这些表面。我们通过在顶部成像纳米级物体并以制造微电极为例展示了这种超平整金表面的功能。由于制造工艺简单且多功能，lgTS 将在成像、催化、电化学和表面科学等领域得到广泛应用。
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