• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Chemistry: A European journal >Tansmission Surface-Plasmon Resonance (T-SPR) Measurements for Monitoring Adsorption on Ultrathin Gold Island films
【24h】

Tansmission Surface-Plasmon Resonance (T-SPR) Measurements for Monitoring Adsorption on Ultrathin Gold Island films

机译：透射表面等离子体共振（T-SPR）测量，用于监测超薄金岛膜上的吸附

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Evaporation of ultrathin (1.3-10 nm nominal thickness) gold films onto quartz or mica leads to the formation of a layer of rather uniform gold islands on the transparent support. The morphology of ultrathin gold island films of various thicknesses was studied by using atomic force microscopy (AFM) and scanning electron microscopy (SEM) imaging. The surface plasmon (SP) absorption characteristic of such films is highly sensitive to the surrounding medium, with the plasmon band changing in intensity and wavelength upon binding of various molecules to the surface. The binding process can be monitored quantitatively by measuring the changes in the gold SP absorption, by using transmission UV/Vis spectroscopy. The method, termed transmission surface plasmon resonance (T-SPR) spectroscopy, is shown to be applicable to both chemically and physically absorbed molecules, in liquid or gas phase, with measurements carried out either ex situ or situ (real-time measurements) using a variety of molecular probes. Binding to a preformed molecular layer on the Au surface produces a similar response, suggesting the possible use of T-SPR for selective sensing. The sensitivity of T-SRP spectroscopy in detecting molecular binding to the gold depends strongly on the film preparation conditions, and may be comparable to that obtained in surface plasmon resonance (SPR) sensing.
机译：将超薄（标称厚度为1.3-10 nm）金膜蒸发到石英或云母上会导致在透明载体上形成一层相当均匀的金岛。通过原子力显微镜（AFM）和扫描电子显微镜（SEM）成像研究了各种厚度的超薄金岛膜的形貌。此类薄膜的表面等离激元（SP）吸收特性对周围介质高度敏感，随着各种分子与表面的结合，等离激元带的强度和波长会发生变化。通过使用透射紫外/可见光谱法测量金SP吸收率的变化，可以定量监测结合过程。该方法被称为透射表面等离振子共振（T-SPR）光谱学，已显示适用于液相或气相的化学和物理吸附分子，并且可以使用非原位或原位进行测量（实时测量）各种分子探针。与Au表面上预先形成的分子层结合会产生类似的响应，这表明可能将T-SPR用于选择性传感。 T-SRP光谱在检测与金的分子结合中的灵敏度在很大程度上取决于薄膜的制备条件，并且可以与表面等离振子共振（SPR）传感中获得的灵敏度相媲美。

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