X-ray linear dichroic ptychography

Yuan Hung Lo

doi:10.1073/pnas.2019068118

2021-01-12

Gilbert, Pupa U. P. A.

Jianwei Miao *

DOI：10.1073/pnas.2019068118

原文链接

原文求助

摘要

En 中文

Biominerals such as seashells, coral skeletons, bone, and tooth enamel are optically anisotropic crystalline materials with unique nanoscale and microscale organization that translates into exceptional macroscopic mechanical properties, providing inspiration for engineering new and superior biomimetic structures. Using Seriatopora aculeata coral skeleton as a model, here, we experimentally demonstrate X-ray linear dichroic ptychography and map the c-axis orientations of the aragonite (CaCO3) crystals. Linear dichroic phase imaging at the oxygen K-edge energy shows strong polarization-dependent contrast and reveals the presence of both narrow (<35 degrees) and wide (>35 degrees) c-axis angular spread in the coral samples. These X-ray ptychography results are corroborated by four-dimensional (4D) scanning transmission electron microscopy (STEM) on the same samples. Evidence of co-oriented, but disconnected, corallite subdomains indicates jagged crystal boundaries consistent with formation by amorphous nanoparticle attachment. We expect that the combination of X-ray linear dichroic ptychography and 4D STEM could be an important multimodal tool to study nano-crystallites, interfaces, nucleation, and mineral growth of optically anisotropic materials at multiple length scales.

Keyword:

coherent diffractive imaging

ptychography

X-ray linear dichroism

biominerals

4D scanning transmission electron microscopy

期刊

Proceedings of the National Academy of Sciences of the United States of America

IF:

9.1

论文数:

10.8W

被引数:

73.5W

机构

University of Colorado System

学者数:

6.3W

论文数: 5.5W

被引数: 1.8K

university of california los angeles

学者数:

5.3W

论文数: 4.2W

被引数: 89

university of colorado boulder

学者数:

2.0W

论文数: 1.5W

被引数: 33

University of California System

学者数:

37.7W

论文数: 33.8W

被引数: 6.6K

查看更多机构

引用论文

Mapping the 3D orientation of nanocrystals and nanostructures in human bone: Indications of novel structural features 绘制人骨中纳米晶体和纳米结构的3D取向: 新结构特征的指示

SCIENCE ADVANCES

IF12.5

2020-06-12

OAAI

Grunewald, Tilman A.; Liebi, Marianne; Wittig, Nina K.; Johannes, Andreas; Sikjaer, Tanja; Rejnmark, Lars; Gao, Zirui; Rosenthal, Martin; Guizar-Sicairos, Manuel; Birkedal, Henrik; Burghammer, Manfred

The NASA Global Flood Mapping System

Springer Remote Sensing/Photogrammetry

IF0

2016-11-04

PREAI

F. Policelli; Dan Slayback; Bob Brakenridge; Joe Nigro; Alfred Hubbard; Ben Zaitchik; Mark Carroll; Hahn Jung

Critical Re-appraisal of Fluorometric Method for Determination of Selenium in Biological Materials

Journal of AOAC INTERNATIONAL

IF0

2020-02-15

PREAI

Tee-Siaw Koh; T H Benson