Turbostratic Boron–Carbon–Nitrogen and Boron Nitride by Flash Joule Heating
Abstract
Turbostratic layers in 2D materials have an interlayer misalignment. The lack of alignment expands the intrinsic interlayer distances and weakens the optical and electronic interactions between adjacent layers. This introduces properties distinct from those structures with well‐aligned lattices and strong coupling interactions. However, direct and rapid synthesis of turbostratic materials remains a challenge owing to their thermodynamically metastable properties. Here, a flash Joule heating (FJH) method to achieve bulk synthesis of boron–carbon–nitrogen ternary compounds with turbostratic structures by a kinetically controlled ultrafast cooling process that takes place within milliseconds (103 to 104 K s−1) is reported. Theoretical calculations support the existence of turbostratic structures and provide estimates of the energy barriers with respect to conversion into the corresponding well‐aligned counterparts. When using non‐carbon conductive additives, a direct synthesis of boron nitride is possible. The turbostratic nature facilitates mechanical exfoliation and more stable dispersions. Accordingly, the addition of flash products to a poly(vinyl alcohol) nanocomposite film coating a copper surface greatly improves the copper's resistance to corrosion in 0.5 m sulfuric acid or 3.5 wt% saline solution. FJH allows the use of bulk materials as reactants and provides a rapid approach to large quantities of the hitherto hard‐to‐access turbostratic materials.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Jul 17, 2022
- Source ID
- 10.1002/adma.202202666
Entities
People
- Chang Ge
- Chi Hun Choi
- Duy Xuan Luong
- Emily A. Mchugh
- Guanhui Gao
- James Tour
- Jinhang Chen
- John Tianci Li
- Kevin M. Wyss
- Kexin Ling
- Paul A. Advincula
- Wala A. Algozeeb
- Weiyin Chen
- Yimo Han
- Zhe Wang
- Zhe Yuan
Organizations
- Air Force Office of Scientific Research
- Rice University
- Robert A. Welch Foundation