Unknown

Dataset Information

0

Distilling nanoscale heterogeneity of amorphous silicon using tip-enhanced Raman spectroscopy (TERS) via multiresolution manifold learning.


ABSTRACT: Accurately identifying the local structural heterogeneity of complex, disordered amorphous materials such as amorphous silicon is crucial for accelerating technology development. However, short-range atomic ordering quantification and nanoscale spatial resolution over a large area on a-Si have remained major challenges and practically unexplored. We resolve phonon vibrational modes of a-Si at a lateral resolution of <60 nm by tip-enhanced Raman spectroscopy. To project the high dimensional TERS imaging to a two-dimensional manifold space and categorize amorphous silicon structure, we developed a multiresolution manifold learning algorithm. It allows for quantifying average Si-Si distortion angle and the strain free energy at nanoscale without a human-specified physical threshold. The multiresolution feature of the multiresolution manifold learning allows for distilling local defects of ultra-low abundance (< 0.3%), presenting a new Raman mode at finer resolution grids. This work promises a general paradigm of resolving nanoscale structural heterogeneity and updating domain knowledge for highly disordered materials.

SUBMITTER: Yang G 

PROVIDER: S-EPMC7835247 | biostudies-literature | 2021 Jan

REPOSITORIES: biostudies-literature

altmetric image

Publications

Distilling nanoscale heterogeneity of amorphous silicon using tip-enhanced Raman spectroscopy (TERS) via multiresolution manifold learning.

Yang Guang G   Li Xin X   Cheng Yongqiang Y   Wang Mingchao M   Ma Dong D   Sokolov Alexei P AP   Kalinin Sergei V SV   Veith Gabriel M GM   Nanda Jagjit J  

Nature communications 20210125 1


Accurately identifying the local structural heterogeneity of complex, disordered amorphous materials such as amorphous silicon is crucial for accelerating technology development. However, short-range atomic ordering quantification and nanoscale spatial resolution over a large area on a-Si have remained major challenges and practically unexplored. We resolve phonon vibrational modes of a-Si at a lateral resolution of <60 nm by tip-enhanced Raman spectroscopy. To project the high dimensional TERS  ...[more]

Similar Datasets

| S-EPMC3907223 | biostudies-literature
| S-EPMC9826433 | biostudies-literature
| S-EPMC8456802 | biostudies-literature
| S-EPMC9851175 | biostudies-literature
| S-EPMC10982994 | biostudies-literature
| S-EPMC7404174 | biostudies-literature
| S-EPMC3586543 | biostudies-literature
| S-EPMC6477806 | biostudies-literature
| S-EPMC4902183 | biostudies-other
| S-EPMC8792926 | biostudies-literature