纳米棒
蒸发
材料科学
拉曼光谱
拉曼散射
纳米尺度
水溶液
化学工程
纳米技术
溶剂
化学
光学
物理化学
有机化学
工程类
物理
热力学
作者
Alfonso Martín,Carola Schopf,Andrea Pescaglini,Jing Jing Wang,Daniela Iacopino
出处
期刊:Langmuir
[American Chemical Society]
日期:2014-08-20
卷期号:30 (34): 10206-10212
被引量:36
摘要
Droplet evaporation is a simple method to induce organization of Au nanorods into ordered superstructures. In general, the self-assembly process occurs by evaporation of aqueous suspensions under strictly controlled experimental conditions. Here we present formation of large area ordered vertical arrays by droplet evaporation of Au nanorod organic suspensions. The uncontrolled (free air) evaporation of such suspensions yielded to formation of ordered nanorod domains covering the entire area of a 5 mm diameter droplet. Detailed investigation of the process revealed that nanorods organized into highly ordered vertical domains at the interface between solvent and air on a fast time scale (minutes). The self-assembly process mainly depended on the initial concentration of nanorod solution and required minimal control of other experimental parameters. Nanorod arrays displayed distinct optical properties which were analyzed by optical imaging and spectroscopy and compared to results obtained from theoretical calculations. The potential use of synthesized arrays as surface-enhanced Raman scattering probes was demonstrated with the model molecule 4-aminobenzenthiol.
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