• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Copper–gold sandwich structures on PE and PET and their SERS enhancement effect
【24h】

Copper–gold sandwich structures on PE and PET and their SERS enhancement effect

机译：PE和PET上的铜金三明治结构及其SERS增强作用

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A Surface Enhanced Raman Spectroscopy (SERS) system with the coupling between surface plasmon polaritons (SPPs) supported by a gold grating and localized surface plasmons (LSPs) excited on grafted copper nanoparticles (CuNPs) was designed and characterized. The excitation of copper nanoparticles–molecules–gold layer sandwich structures was studied under 633 nm wavelength irradiation. Rhodamine 6G (R6G) molecules were added onto SERS substrates and located above and between the CuNPs. Prepared samples were studied by several experimental techniques: goniometry, X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDS), scanning electron microscopy (SEM), atomic force microscopy (AFM) and electrokinetic analysis. Aging of the modified PE and PET was accompanied by an increase in the contact angle, which was due to a reorientation of the molecular polar segments produced during the plasma treatment. XPS and zeta potential measurements indicated that the thiols were chemically bonded to the gold coated polymer surfaces and that the thiols mediate subsequent grafting of Cu nanoparticles. Both XPS and EDS analyses revealed that a higher concentration of grafted copper nanoparticles was achieved on the PET substrate. EDS showed that Cu nanoparticles are homogeneously distributed over the whole polymer surface. The enhancement factor was higher for PE (1.7 × 103) compared to PET (0.9 × 102).
机译：设计并表征了一种表面增强拉曼光谱（SERS）系统，该系统具有由金光栅支撑的表面等离激元极化子（SPP）与在接枝铜纳米颗粒（CuNPs）上激发的局部表面等离激元（LSP）之间的耦合。在633 nm波长辐射下研究了铜纳米颗粒-分子-金层夹层结构的激发。罗丹明6G（R6G）分子被添加到SERS基板上，并位于CuNP上方和之间。通过几种实验技术研究了制备的样品：测角法，X射线光电子能谱（XPS），能量色散X射线能谱（EDS），扫描电子显微镜（SEM），原子力显微镜（AFM）和电动分析。改性的PE和PET的老化伴随着接触角的增加，这是由于等离子处理过程中产生的分子极性链段的重新定向所致。 XPS和zeta电位测量结果表明，硫醇化学键合到镀金的聚合物表面，并且硫醇介导了随后的Cu纳米粒子接枝。 XPS和EDS分析均表明，在PET基材上获得了更高浓度的接枝铜纳米颗粒。 EDS显示，Cu纳米颗粒均匀地分布在整个聚合物表面上。 PE（1.7×10 3 ）的增强因子高于PET（0.9×10 2 ）的增强因子。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号