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A Neoteric View of sp2 Amorphous Carbon
1Institute of Physical Researches and Technology, Peoples' Friendship University of Russia (RUDN University), 117198 Moscow, Russia.
This study reveals sp2 amorphous carbons as multilevel structures composed of basic structural units (BSUs). These BSUs, containing necklaced graphene molecules and heteroatoms, dictate the material's short-range order and properties.
Area of Science:
- Materials Science
- Chemistry
- Nanotechnology
Background:
- Understanding the structure of sp2 amorphous carbons is crucial for advanced material applications.
- Traditional analytical methods offer limited insight into the complex multilevel structures of these materials.
Purpose of the Study:
- To provide a new vision of sp2 amorphous carbons using empirical and virtual analytics.
- To elucidate the multilevel structural organization, from basic structural units (BSUs) to macroscopic agglomerates.
- To detail the composition and ordering principles governing these carbon solids.
Main Methods:
- Empirical analytics: Structural determination, chemical content evaluation (total and atomic), and covalent bond composition analysis.
- Virtual analytics: Application of the Digital Twins concept and virtual vibrational spectrometry.
- Analysis focused on basic structural units (BSUs) and their stacks, which define short-range order.
Main Results:
- sp2 amorphous carbons are confirmed as multilevel structures comprising basic structural units (BSUs).
- BSUs are identified as necklaced graphene molecules, with size/shape influenced by graphene domains and composition by heteroatoms.
- BSUs and their stacks are the primary determinants of short-range order in these carbon solids.
Conclusions:
- The study presents a comprehensive framework for analyzing sp2 amorphous carbons.
- Empirical and novel virtual analytical approaches offer unprecedented insights into their complex structure.
- This work establishes a foundation for further detailed investigation and application of these materials.
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