首页> 美国卫生研究院文献>ACS Central Science >Dealloyed Intra-Nanogap Particles with Highly RobustQuantifiable Surface-Enhanced Raman Scattering Signals for Biosensingand Bioimaging Applications
【2h】

Dealloyed Intra-Nanogap Particles with Highly RobustQuantifiable Surface-Enhanced Raman Scattering Signals for Biosensingand Bioimaging Applications

机译:高度坚固的脱合金纳米间隙内颗粒用于生物传感的可量化表面增强拉曼散射信号和生物成像应用

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务,本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文,但由于OA文献来源多样且变更频繁,仍可能出现获取不到、文献不完整或与标题不符等情况,如果获取不到我们将提供退款服务。请知悉。

摘要

Uniformly controlling a large number of metal nanostructures with a plasmonically enhanced signal to generate quantitative optical signals and the widespread use of these structures for surface-enhanced Raman scattering (SERS)-based biosensing and bioimaging applications are of paramount importance but are extremely challenging. Here, we report a highly controllable, facile selective-interdiffusive dealloying chemistry for synthesizing the dealloyed intra-nanogap particles (DIPs) with a ∼2 nm intragap in a high yield (∼95%) without the need for an interlayer. The SERS signals from DIPs are highly quantitative and polarization-independent with polarized laser sources. Remarkably, all the analyzed particles displayed the SERS enhancement factors (EFs) of ≥1.1 × 108 with a very narrow distribution of EFs. Finally, we show that DIPs can be used as ultrasensitive SERS-based DNA detection probes for detecting 10 aM to 1 pM target concentrations and highly robust, quantitative real-time cell imaging probes for long-term imaging with low laser power and short exposuretime.
机译:用等离激元增强的信号均匀地控制大量金属纳米结构以产生定量的光信号,这些结构在基于表面增强拉曼散射(SERS)的生物传感和生物成像应用中的广泛应用至关重要,但极具挑战性。在这里,我们报告了一种高度可控的,易于选择的-相互扩散的脱合金工艺,该化学方法可在不使用中间层的情况下以高产率(〜95%)来合成具有约2 nm内间隙的脱合金内纳米颗粒(DIP)。来自DIP的SERS信号是高度定量的,并且与偏振激光源偏振无关。值得注意的是,所有分析的颗粒均显示出SERS增强因子(EFs)≥1.1×10 8 ,且EFs分布非常窄。最后,我们证明DIP可用作基于超灵敏SERS的DNA检测探针,可检测10 aM至1 pM目标浓度,以及高度耐用的定量实时细胞成像探针,可用于低激光功率和短曝光的长期成像时间。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
代理获取

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