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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Gas-Phase Fluorination of Hexagonal Boron Nitride

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Author(s):
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Meiyazhagan, AshokKumar [1] ; Serles, Peter [2] ; Salpekar, Devashish [1] ; Oliveira, Eliezer Fernando [1, 3, 4] ; Alemany, Lawrence B. [5, 6] ; Fu, Riqiang [7] ; Gao, Guanhui [1] ; Arif, Taib [2] ; Vajtai, Robert [1] ; Swaminathan, Venkataraman [1] ; Galvao, Douglas S. [3, 4] ; Khabashesku, Valery N. [1] ; Filleter, Tobin [2] ; Ajayan, Pulickel M. [1]
Total Authors: 14
Affiliation:
[1] Rice Univ, Dept Mat Sci & NanoEngn, Houston, TX 77005 - USA
[2] Univ Toronto, Dept Mech & Ind Engn, 5 Kings Coll Rd, Toronto, ON M5S 3G8 - Canada
[3] Univ Campinas UNICAMP, Gleb Wataghin Inst Phys, Grp Organ Solids & New Mat, BR-13 08386 Campinas, SP - Brazil
[4] Univ Campinas UNICAMP, Ctr Computat Engn & Sci CCES, BR-13083861 Campinas, SP - Brazil
[5] Rice Univ, Dept Chem, Houston, TX 77005 - USA
[6] Rice Univ, Shared Equipment Author, Houston, TX 77005 - USA
[7] Natl High Magnet Field Lab, 1800 E Paul Dirac Dr, Tallahassee, FL 32310 - USA
Total Affiliations: 7
Document type: Journal article
Source: Advanced Materials; v. 33, n. 52 OCT 2021.
Web of Science Citations: 0
Abstract

Hexagonal boron nitride (hBN) has received much attention in recent years as a 2D dielectric material with potential applications ranging from catalysts to electronics. hBN is a stable covalent compound with a planar hexagonal lattice and is relatively unreactive to most chemical environments, making the chemical functionalization of hBN challenging. Here, a simple, scalable strategy to fluorinate hBN using a direct gas-phase fluorination technique is reported. The nature of fluorine bonding to the hBN lattice and their chemical coordination are described based on various characterization studies and theoretical models. The fluorine functionalized hBN shows a bandgap reduction and displays a semiconducting behavior due to the fluorination process. Additionally, the fluorinated hBN shows significant improvement in its thermal and friction properties, which could be substantial in applications such as lubricants and thermal fluids. Theory and simulations reveal that the enhanced friction properties of fluorinated hBN result from reduced inter-planar interaction energy by electrostatic repulsion of intercalated fluorine atoms between hBN layers without significant disruption of the in-plane lattice. This technique paves the way for the fluorination of several other 2D structures for various applications such as magnetism and functional nanoscale electronic devices. (AU)

FAPESP's process: 19/07157-9 - DESIGNING NEW 3D STRUCTURES FROM ZEOLITE TEMPLATES FOR 3D PRINTING APPLICATIONS
Grantee:Eliezer Fernando de Oliveira
Support Opportunities: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 16/18499-0 - Investigation on the structural, mechanical and functional properties of carbon-based nanostructures
Grantee:Eliezer Fernando de Oliveira
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/08293-7 - CCES - Center for Computational Engineering and Sciences
Grantee:Munir Salomao Skaf
Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC