Fast, simple, combinatorial routes to the fabrication of reusable, plasmonically active gold nanostructures by interferometric lithography of self-assembled monolayers.
Fast, simple, combinatorial routes to the fabrication of reusable, plasmonically active gold nanostructures by interferometric lithography of self-assembled monolayers.
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DOI：
10.1021/nn5014319
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发表时间：
2014-07
期刊：
影响因子：
17.1
通讯作者：
A. Tsargorodska;Osama el Zubir;Brice Darroch;M. Cartron;T. Basova;C. Neil Hunter;Alexei V. Nabok;Graham J Leggett
中科院分区：
文献类型：
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作者：
A. Tsargorodska;Osama el Zubir;Brice Darroch;M. Cartron;T. Basova;C. Neil Hunter;Alexei V. Nabok;Graham J Leggett
我们描述了一种快速、简单的方法，用于在宏观（cm（2））区域内制造可重复使用、坚固的金纳米结构。各种各样的纳米结构形态可以以组合的方式获得。自组装单层的烷基硫醇铬引发的多晶金膜图案化使用劳埃德的反射镜干涉仪和蚀刻使用巯基乙胺在乙醇中的快速过程中，不需要访问洁净室设施。铬粘附层的使用有利于清洗的标本浸泡在食人鱼解决方案，使其重复使用，而不会显着改变其吸收光谱超过两年。制备了200种不同纳米结构的库，并发现其表现出一系列的光学行为。退火产生的结构具有均匀的高结晶度，表现出强大的等离子体激元带。使用组合的方法，建立相关性之间的预退火形态（由制造条件确定）和退火后的光学性能，使标本准备“为了”与选定的局部表面等离子体共振。发现以这种方式形成的金纳米结构的折射率敏感性与通过其他方法制造的结构的测量结果密切相关。在四叔丁基取代酞菁的拉曼光谱中观察到强烈的增强。组氨酸标记的绿色荧光蛋白（His-GFP）和细菌叶绿素a的位点特异性附着后的等离子体带的位置的位移进行了测量的范围内的纳米结构的膜，使快速识别的一个，产生了最大的位移。这种方法提供了一个简单的路线，以生产耐用的，可重复使用的，宏观阵列的金纳米结构与精确可控的形态。
We describe a fast, simple method for the fabrication of reusable, robust gold nanostructures over macroscopic (cm(2)) areas. A wide range of nanostructure morphologies is accessible in a combinatorial fashion. Self-assembled monolayers of alkylthiolates on chromium-primed polycrystalline gold films are patterned using a Lloyd's mirror interferometer and etched using mercaptoethylamine in ethanol in a rapid process that does not require access to clean-room facilities. The use of a Cr adhesion layer facilitates the cleaning of specimens by immersion in piranha solution, enabling their repeated reuse without significant change in their absorbance spectra over two years. A library of 200 different nanostructures was prepared and found to exhibit a range of optical behavior. Annealing yielded structures with a uniformly high degree of crystallinity that exhibited strong plasmon bands. Using a combinatorial approach, correlations were established between the preannealing morphologies (determined by the fabrication conditions) and the postannealing optical properties that enabled specimens to be prepared "to order" with a selected localized surface plasmon resonance. The refractive index sensitivity of gold nanostructures formed in this way was found to correlate closely with measurements reported for structures fabricated by other methods. Strong enhancements were observed in the Raman spectra of tetra-tert-butyl-substituted phthalocyanine. The shift in the position of the plasmon band after site-specific attachment of histidine-tagged green fluorescent protein (His-GFP) and bacteriochlorophyll a was measured for a range of nanostructured films, enabling the rapid identification of the one that yielded the largest shift. This approach offers a simple route to the production of durable, reusable, macroscopic arrays of gold nanostructures with precisely controllable morphologies.