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首页> 外文会议>Fifth Asia International Symposium on Mechatronics >Enhanced plasmonic effects in AG decorated amorphous TiO2 nanotube arrays
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Enhanced plasmonic effects in AG decorated amorphous TiO2 nanotube arrays

机译：AG装饰的非晶TiO2纳米管阵列中增强的等离子体效应

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摘要

In the present investigation SERS sensitivity and plasmonic-photonic interference coupling (P-PIC) in amorphous TiO2 nanotube (A[TNT]) and crystalline silver (Ag) nanoparticles was studied. TNT were synthesized by two step anodization on titanium (Ti) substrate. Using thermal evaporation, 20 nm Ag film overcoating on TNT structures was synthesized, which coalescence to form Ag nanoparticles, acting as a three dimensional (3D) surface enhanced raman spectroscopy (SERS) substrate for rhodamine 6G (R6G) molecule detection. The nanoarchitecture phase formation is confirmed by X-ray diffraction (XRD) analysis, Raman spectroscopy analysis. Surface morphology and the salient features are studied by scanning electron microscopy (SEM). Current decay time is also studied and compared for the samples respectively which show large current decay time for A[TNT]-Ag as compared to C[TNTAg]. UV-visible absorption studies shows larger red shift in the absorption band gap edge of A[TNT]-Ag samples as compared to C[TNT-Ag] samples. Moreover the TNT length variation in A[TNT]-Ag samples results into constructive or destructive interference, which in turn affect the P-PIC and R6G molecule detection as well as SERS intensity which was approximately three time higher than C[TNT-Ag].
机译：在本研究中，研究了无定形TiO2纳米管（A [TNT]）和晶体银（Ag）纳米粒子中的SERS敏感性和等离子-光子干扰耦合（P-PIC）。通过在钛（Ti）基板上进行两步阳极氧化合成TNT。使用热蒸发，在TNT结构上合成了20 nm的Ag膜外涂层，该涂层聚结形成Ag纳米颗粒，充当用于罗丹明6G（R6G）分子检测的三维（3D）表面增强拉曼光谱（SERS）衬底。通过X射线衍射（XRD）分析，拉曼光谱分析确认了纳米体系相的形成。通过扫描电子显微镜（SEM）研究了表面形态和显着特征。还分别研究和比较了样品的电流衰减时间，这些样品显示出与C [TNTAg]相比，A [TNT] -Ag的电流衰减时间大。紫外可见吸收研究表明，与C [TNT-Ag]样品相比，A [TNT] -Ag样品的吸收带隙边缘有较大的红移。此外，A [TNT] -Ag样品中TNT长度的变化会导致相长干涉或相消干涉，进而影响P-PIC和R6G分子检测以及SERS强度，其强度大约是C [TNT-Ag]的三倍。 。

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