Growth mechanism and SERS effect of Ag nanowire arrays prepared by solid-state ionics method

IF 3.4 3区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR
Dapeng Xu, Yarui Liu, Song Zhang, Zixiong Wang, Wei Yang, Qiaoqin Guo, Jian Chen
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引用次数: 0

Abstract

Solid-state ionic method has attracted more and more attention due to its simple operation and controllable preparation, but its growth mechanism is still uncertain. In this work, Ag nanowire (Ag NW) arrays prepared by solid-state ionics method at 5 μA impressed currents using fast ionic conductor RbAg4I5 films and different metal electrodes were reported. The conduction mode of Ag+ in RbAg4I5 films, the growth mechanism of Ag NW arrays prepared by solid-state ionics method and the effect of microscopic morphology on surface-enhance Raman scattering (SERS) performance were investigated. The results show that Ag nanoparticles (Ag NPs) with diameters from 40 nm to 70 nm were attached to the surface of Ag NW arrays with diameters of 80–150 nm prepared with different metal electrodes, which lead to Ag NW arrays have high surface roughness. The conduction velocity and stability of Ag+ in RbAg4I5 films are closely related to the morphology of Ag NW arrays. The irregular electrode interface and apical growth advantage resulted in the fractal dimension of Ag NW arrays prepared with Ag electrodes is 1.69 due to macroscopic dendritic structure. Ag NW arrays have excellent SERS performance due to the many Ag NPs attached to the surface of the closely aligned Ag NWs, the limit of detection (LOD) for Basic Fuchsin (BF) and Crystal Violet (CV) detected by Ag NW arrays SERS substrates prepared with Ag electrodes are as low as 10−11and 10−14mol/L, respectively. This paper provides a reference for the preparation method of metal nanostructures, Ag NW arrays have good potential for application in the field of trace analysis.

Abstract Image

固态离子法制备的银纳米线阵列的生长机理和 SERS 效应
固态离子法因其操作简单、制备过程可控而受到越来越多的关注,但其生长机理仍不确定。本研究采用固态离子法,利用快速离子导体 RbAg4I5 薄膜和不同的金属电极,在 5 μA 冲击电流下制备了 Ag 纳米线(Ag NW)阵列。研究了 Ag+ 在 RbAg4I5 薄膜中的传导模式、固态离子法制备的 Ag NW 阵列的生长机制以及微观形貌对表面增强拉曼散射(SERS)性能的影响。结果表明,不同金属电极制备的直径为 80-150 nm 的 Ag NW 阵列表面附着有直径为 40 nm 至 70 nm 的 Ag NPs,导致 Ag NW 阵列具有较高的表面粗糙度。RbAg4I5 薄膜中 Ag+ 的传导速度和稳定性与 Ag NW 阵列的形态密切相关。由于不规则的电极界面和顶端生长优势,使用银电极制备的 Ag NW 阵列具有宏观树枝状结构,分形维数为 1.69。由于紧密排列的 Ag NW 表面附着了许多 Ag NPs,因此 Ag NW 阵列具有优异的 SERS 性能,用 Ag NW 阵列制备的 SERS 基底检测到的碱性品红(BF)和水晶紫(CV)的检测限(LOD)分别低至 10-11mol/L 和 10-14mol/L。本文为金属纳米结构的制备方法提供了参考,Ag NW 阵列在痕量分析领域具有良好的应用潜力。
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来源期刊
Solid State Sciences
Solid State Sciences 化学-无机化学与核化学
CiteScore
6.60
自引率
2.90%
发文量
214
审稿时长
27 days
期刊介绍: Solid State Sciences is the journal for researchers from the broad solid state chemistry and physics community. It publishes key articles on all aspects of solid state synthesis, structure-property relationships, theory and functionalities, in relation with experiments. Key topics for stand-alone papers and special issues: -Novel ways of synthesis, inorganic functional materials, including porous and glassy materials, hybrid organic-inorganic compounds and nanomaterials -Physical properties, emphasizing but not limited to the electrical, magnetical and optical features -Materials related to information technology and energy and environmental sciences. The journal publishes feature articles from experts in the field upon invitation. Solid State Sciences - your gateway to energy-related materials.
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