Gas-Phase Fluorination of Hexagonal Boron Nitride
AshokKumar Meiyazhagan1, Peter Serles2, Devashish Salpekar1
1Department of Materials Science & NanoEngineering, Rice University, Houston, TX, 77005, USA.
Advanced Materials (Deerfield Beach, Fla.)
|October 7, 2021
Summary
Fluorinating hexagonal boron nitride (hBN) using a gas-phase technique creates a semiconducting material with improved thermal and friction properties. This scalable method enhances 2D materials for electronics and lubricants.
Area of Science:
- Materials Science
- Nanotechnology
- Surface Chemistry
Background:
- Hexagonal boron nitride (hBN) is a 2D dielectric material with diverse applications.
- Its chemical inertness makes functionalization difficult.
- Developing methods for hBN modification is crucial for advanced applications.
Purpose of the Study:
- To report a scalable gas-phase fluorination technique for hBN.
- To characterize the fluorine bonding and coordination on the hBN lattice.
- To investigate the impact of fluorination on hBN's electronic, thermal, and friction properties.
Main Methods:
- Direct gas-phase fluorination of hBN.
- Characterization using various analytical techniques.
- Theoretical modeling and simulations to understand bonding and properties.
Main Results:
- Successful fluorination of hBN achieved via a scalable gas-phase method.
- Fluorination reduces the bandgap, inducing semiconducting behavior.
- Enhanced thermal stability and reduced friction observed in fluorinated hBN.
- Simulations confirm reduced inter-planar interactions due to fluorine intercalation.
Conclusions:
- Gas-phase fluorination is an effective strategy for modifying hBN.
- Fluorinated hBN exhibits desirable electronic, thermal, and tribological properties.
- This technique enables the functionalization of other 2D materials for advanced applications.
Related Concept Videos
03:24Hybridization of Atomic Orbitals I
52.3K
The mathematical expression known as the wave function, ψ, contains information about each orbital and the wavelike properties of electrons in an isolated atom. When atoms are bound together in a molecule, the wave functions combine to produce new mathematical descriptions that have different shapes. This process of combining the wave functions for atomic orbitals is called hybridization and is mathematically accomplished by the linear combination of atomic orbitals. The new orbitals that...
52.3K
03:08Hydroboration-Oxidation of Alkenes
9.4K
In addition to the oxymercuration–demercuration method, which converts the alkenes to alcohols with Markovnikov orientation, a complementary hydroboration-oxidation method yields the anti-Markovnikov product. The hydroboration reaction, discovered in 1959 by H.C. Brown, involves the addition of a B–H bond of borane to an alkene giving an organoborane intermediate. The oxidation of this intermediate with basic hydrogen peroxide forms an alcohol.
9.4K
02:55Exceptions to the Octet Rule
31.3K
Many covalent molecules have central atoms that do not have eight electrons in their Lewis structures. These molecules fall into three categories:
31.3K
02:52VSEPR Theory and the Basic Shapes
74.5K
Overview of VSEPR Theory
74.5K
01:13Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene
6.7K
Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.
6.7K
04:01VSEPR Theory and the Effect of Lone Pairs
46.1K
Effect of Lone Pairs of Electrons on Molecule Geometry
46.1K