...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Physical chemistry chemical physics: PCCP >Spectroscopical properties of organic/metal nanohybrids
【24h】

Spectroscopical properties of organic/metal nanohybrids

机译：有机/金属纳米杂化物的光谱性质

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

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

摘要

The aim of our work was to prepare stable nanohybrids of controlled size and shape consisting of a noble metal core decorated with polydiacetylenes (PDAs). Due to the combination of the outstanding linear and nonlinear optical properties of the polydiacetylenic chains with the electromagnetic field-enhancing capability of metal nanostructures, these novel composites can find potential application in different fields. In particular, the different colours exhibited by PDAs in relation to the chemical nature of the monomer and the polymerization procedure, as well as in response to environmental perturbations, make them excellent materials for the fabrication of sensing devices. On the basis of our previous work on PDA self-assembled monolayers on flat metal surfaces, the results of which are briefly reported, we prepared differently-shaped gold and silver nanocores (spheres, cages) coated with various diacetylenic monomers having end-groups able to firmly anchor to the metal surface. These nanohybrids exhibit in aqueous colloidal solution an enhanced photochemical polymerization monitored step by step with UV-Vis and SERS techniques. It is shown that in these stable assemblies an intra-particle polymerization takes place and that the dominant PDA form is conditioned by the core size and geometry. While the nanoparticles are SERS active in the visible, the nanocages should be excellent SERS substrates from the visible to the near infrared regions.
机译：我们的工作目的是制备尺寸和形状可控的稳定纳米杂化物，该杂化物由装饰有聚二乙炔（PDA）的贵金属核组成。由于聚二炔链出色的线性和非线性光学性质与金属纳米结构的电磁场增强能力的结合，这些新型复合材料可以在不同领域中找到潜在的应用。尤其是，与单体的化学性质和聚合过程有关的PDA所呈现的不同颜色，以及对环境干扰的响应，使PDA成为制造传感设备的极佳材料。根据我们先前在平面金属表面上PDA自组装单分子膜的研究成果（简要报告了其结果），我们制备了不同形状的金和银纳米核（球形，笼状），包覆了具有端基能力的各种二炔单体牢固地固定在金属表面上。这些纳米杂化物在胶体水溶液中表现出通过UV-Vis和SERS技术逐步监测的增强的光化学聚合反应。结果表明，在这些稳定的组件中，发生了粒子内聚合，并且主要的PDA形式受芯尺寸和几何形状的影响。尽管纳米颗粒在可见光中具有SERS活性，但从可见光到近红外区域，纳米笼应该是出色的SERS基质。

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