用于多重传感的多层涂层的全分散性子颗粒
Journal of the American Chemical Society
|May 15, 2018
概括
具有纳米级尖峰的刺粒子 (HP) 在各种介质中保持稳定性,即使经过修改. 这些全 dispersible 颗粒可以在具有挑战性的环境中进行增强的表面增强拉曼散射 (SERS) 分析.
科学领域:
- 体和表面科学
- 纳米技术
- 光谱学
背景情况:
- 子粒子 (HPs) 由于其尖的几何形状,具有显著的分散稳定性,减少了范德瓦尔斯力.
- 对于HP的表面修饰,以保持这种全方位分散性并获得新的功能,其潜力仍未被探索.
研究的目的:
- 调查聚合物和纳米粒子 (NP) 修饰的HP是否保持其全方位分散性.
- 探索改造HP作为稳定载体的实用性,用于像表面增强拉曼散射 (SERS) 这样的先进应用.
主要方法:
- 层层组装 (LBL/LbL) 用于在HP上创建聚合物和黄金NP的密度合规涂层.
- 在极端极性和离子强度的环境中评估分散稳定性.
- 修改HP的SERS性能被评估并与光滑合体进行比较.
主要成果:
- 用LBL涂层修改的HP在各种介质中保持出色的分散稳定性.
- 表面改造的HP显示出强大的SERS能力,克服了传统SERS探测器的不稳定性.
- 基于HP的SERS探测器显示信号强度增加了十倍以上,并使多重检测在高离子强度介质中成为可能.
结论:
- 通过LBL组件对HP进行表面修改,可以保持其全方位分散性.
- 在复杂的生物和化学环境中,全分散的光学活性HP提供了多重SERS检测的稳定平台.
- 这些发现为使用稳定的纳米载体的先进诊断和分析工具铺平了道路.
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