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小角X射线散射中的角超分辨率检索

Angular super-resolution retrieval in small-angle X-ray scattering.

作者信息

Gutman Benjamin, Mrejen Michael, Shabat Gil, Avinery Ram, Shkolnisky Yoel, Beck Roy

机构信息

School of Mathematical Sciences, Tel Aviv University, 69978, Tel Aviv, Israel.

The Center for Nanoscience and Nanotechnology, Tel Aviv University, 69978, Tel Aviv, Israel.

出版信息

Sci Rep. 2020 Sep 29;10(1):16038. doi: 10.1038/s41598-020-73030-2.

DOI:10.1038/s41598-020-73030-2
PMID:32994517
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7525553/
Abstract

Small-angle X-ray scattering (SAXS) techniques enable convenient nanoscopic characterization for various systems and conditions. Unlike synchrotron-based setups, lab-based SAXS systems intrinsically suffer from lower X-ray flux and limited angular resolution. Here, we develop a two-step retrieval methodology to enhance the angular resolution for given experimental conditions. Using minute hardware additions, we show that translating the X-ray detector in subpixel steps and modifying the incoming beam shape results in a set of 2D scattering images, which is sufficient for super-resolution SAXS retrieval. The technique is verified experimentally to show superior resolution. Such advantages have a direct impact on the ability to resolve finer nanoscopic structures and can be implemented in most existing SAXS apparatuses both using synchrotron- and laboratory-based sources.

摘要

小角X射线散射（SAXS）技术能够方便地对各种系统和条件进行纳米尺度表征。与基于同步加速器的装置不同，基于实验室的SAXS系统本质上存在X射线通量较低和角分辨率有限的问题。在此，我们开发了一种两步检索方法，以在给定实验条件下提高角分辨率。通过添加微小的硬件，我们表明以亚像素步长平移X射线探测器并修改入射光束形状会产生一组二维散射图像，这足以进行超分辨率SAXS检索。该技术经实验验证具有卓越的分辨率。这些优势对分辨更精细的纳米结构的能力有直接影响，并且可以在大多数现有的使用基于同步加速器和实验室光源的SAXS仪器中实现。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/a0ed3fe590d3/41598_2020_73030_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/f7d0e2312d70/41598_2020_73030_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/df28cfd8fd82/41598_2020_73030_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/b096c38f8cfc/41598_2020_73030_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/8f0bf66d74ee/41598_2020_73030_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/3f2488baf717/41598_2020_73030_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/6ec9f4c96778/41598_2020_73030_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/c0f1f3280c64/41598_2020_73030_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/af33358e2f74/41598_2020_73030_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/67c4ef0ecd0f/41598_2020_73030_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/1be8c8c0de4a/41598_2020_73030_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/a0ed3fe590d3/41598_2020_73030_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/f7d0e2312d70/41598_2020_73030_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/df28cfd8fd82/41598_2020_73030_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/b096c38f8cfc/41598_2020_73030_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/8f0bf66d74ee/41598_2020_73030_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/3f2488baf717/41598_2020_73030_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/6ec9f4c96778/41598_2020_73030_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/c0f1f3280c64/41598_2020_73030_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/af33358e2f74/41598_2020_73030_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/67c4ef0ecd0f/41598_2020_73030_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/1be8c8c0de4a/41598_2020_73030_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0d06/7525553/a0ed3fe590d3/41598_2020_73030_Fig11_HTML.jpg

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本文引用的文献

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Delayed nucleation in lipid particles.脂质颗粒中的成核延迟。
Soft Matter. 2020 Jan 7;16(1):247-255. doi: 10.1039/c9sm01834d. Epub 2019 Nov 28.
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Metastability in lipid based particles exhibits temporally deterministic and controllable behavior.基于脂质的颗粒中的亚稳态表现出时间上确定且可控的行为。
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