Ag纳米立方体边长对表面增强拉曼散射强度的影响  

Influence of Ag nanocubes edge length on surface enhanced Raman scattering intensity

作　　者：许玉姣 王佳乐 Xu Yujiao;Wang Jiale(College of Science,Donghua University,Shanghai 201620,China)

机构地区：[1]东华大学理学院,上海201620

出　　处：《产业用纺织品》2024年第9期21-26,共6页Technical Textiles

基　　金：上海市自然科学基金(20ZR1401700)。

摘　　要：利用水热法,通过改变反应温度、反应时间和前驱体浓度等参数成功制备不同边长的Ag纳米立方体,探讨Ag纳米立方体边长对表面增强拉曼散射(SERS)强度的影响。结果表明,随着Ag纳米立方体边长的增加,SERS强度先增大后减小。当Ag纳米立方体边长为75 nm时,SERS强度达到最大值。以75 nm的Ag纳米立方体为SERS衬底,以典型的纺织废水污染物罗丹明B(Rh B)为探针分子,探究SERS强度的变化。结果显示,Rh B溶液的浓度低至10^(-6)mol/L时仍可检测到SERS信号。因此,Ag纳米立方体可以作为一种灵敏度较高的SERS衬底,用于检测低浓度污染物。Ag nanocubes with different edge lengths were fabricated using hydrothermal method by changing the parameters such as reaction temperature,reaction time,precursors concentration and so on.And the influence of Ag nanocubes edge length on surface enhanced Raman scattering(SERS)intensity was discussed.The results indicated that,the SERS intensity rose firstly and then fell with the increase of Ag nanocubes edge length.The Ag nanocubes of 75 nm in edge length displayed a maximum SERS intensity.The nanocubes of 75 nm in edge length were used as SERS substrates,and the typical textile wastewater pollutant Rhodamine B(RhB)was used as probe molecule to investigate the influence on SERS intensities.The results showed that SERS signals of RhB could still be detected at 10^(-6) mol/L.Therefore,Ag nanocubes can be used as suitable SERS substrates with high sensitivity for pollutant detection of low concentrations.

关 键 词：Ag纳米立方体 表面增强拉曼散射(SERS) 水热法 罗丹明B(RhB) 

分 类 号：O657.37[理学—分析化学]