arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2004.10575physics.opticsphysics.bio-ph
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高保真干涉散射显微镜的多尺度建模与分析

Multiscale Modeling and Analysis for High-fidelity Interferometric Scattering Microscopy

Shupei Lin, Yong He, Hadrien Marc Louis Robert, Hong Li, Pu Zhang, Marek Piliarik, Xue-Wen Chen

摘要:

干涉散射显微镜(iSCAT),作为一种超灵敏的无荧光成像模式,最近得到了极大的关注,并迅速发展从原理演示到定量传感。在这里,我们报告的理论和实验研究iSCAT与样品的结构尺寸不同的4-5个数量级。特别是,我们演示和直观地解释了亚纳米表面粗糙度的玻璃盖玻片和云母表面上的绝对信号和金纳米粒子的点扩散函数的形状的深刻影响。这些量显著地影响用于确定目标尺寸和在所有三个维度上的位置的精度。此外,我们研究了一个样品系统模仿金纳米粒子在一个简化的细胞环境,并显示位置依赖性,甚至不对称的点扩散函数的纳米粒子。多尺度研究将促进高保真iSCAT在实际应用中的开发。

英文摘要:

Interferometric scattering microscopy (iSCAT), as an ultrasensitive fluorescence-free imaging modality, has recently gain enormous attention and been rapidly developing from demonstration of principle to quantitative sensing. Here we report on a theoretical and experimental study for iSCAT with samples having structural dimensions that differ by 4-5 orders of magnitude. In particular, we demonstrate and intuitively explain the profound effects of sub-nanometer surface roughness of a glass coverslip and of a mica surface on the absolute signal and the shape of the point spread function of a gold nanoparticle. These quantities significantly affect the accuracies for determining the target size and position in all three dimensions. Moreover, we investigate a sample system mimicking a gold nanoparticle in a simplified cell environment and show position-dependent and even asymmetric point spread function of the nanoparticle. The multiscale study will facilitate the development of high fidelity iSCAT in real applications.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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