Liu Sisi, Xu Zhimou, Sun Tangyou, Zhao Wenning, Wu Xinghui, Ma Zhichao, Zhang Xueming, He Jian, Chen Cunhua
J Nanosci Nanotechnol. 2014 Jun;14(6):4608-14. doi: 10.1166/jnn.2014.9036.
Position-configurable, reproducible, vertically aligned nanosheets assemblies (ANAs) arrays are fabricated by polymer-templated electrodeposition method at room temperature. Here, nanoimprint lithography is utilized to fabricate polymer template on the fluorine-doped tin oxide substrate for the purpose of evenly tuning the location of Ag nanostructures. Subsequently, vertically aligned ANAs can be achieved at the bottom of each hole via electrodeposition in a mixed aqueous solution of AgNO3 and citric acid. To obtain uniform ANAs array, we have systematically investigated the factors that influenced the electrodeposition. It was found that the formation of uniform ANAs arrays is strongly depended on the seeding layer, citric acid concentration, electrodeposition potential and time. The as-synthesized ANAs array exhibited a remarkable SERS activity and Raman signal reproducibility to rhodamine 6G, a concentration down to 10(-13) M can be identified. Our results revealed that the ANAs array is a highly desirable candidate as the reliable enhancer for high performance SERS analysis.
通过聚合物模板电沉积法在室温下制备了位置可配置、可重现的垂直排列的纳米片组件（ANA）阵列。在此，利用纳米压印光刻技术在氟掺杂氧化锡衬底上制备聚合物模板，以均匀调节银纳米结构的位置。随后，通过在硝酸银和柠檬酸的混合水溶液中进行电沉积，可在每个孔的底部实现垂直排列的ANA。为了获得均匀的ANA阵列，我们系统地研究了影响电沉积的因素。发现均匀ANA阵列的形成强烈依赖于种子层、柠檬酸浓度、电沉积电位和时间。所合成的ANA阵列对罗丹明6G表现出显著的表面增强拉曼散射（SERS）活性和拉曼信号重现性，能够识别低至10^(-13) M的浓度。我们的结果表明，ANA阵列是用于高性能SERS分析的可靠增强剂的理想候选者。
