Gas-Phase Fluorination of Hexagonal Boron Nitride

Autor(es):Mostrar menos -

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]

Afiliação do(s) autor(es)

^[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

• Tipo de documento: Artigo Científico
• Fonte: Advanced Materials; v. 33, n. 52 OCT 2021.
• Citações Web of Science: 0

Resumo

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)

• Processo FAPESP: 19/07157-9 - Projetando novas estruturas 3d a partir de modelos de zeólitas para aplicações em impressão 3d
• Beneficiário: Eliezer Fernando de Oliveira
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 16/18499-0 - Investigação de propriedades estruturais, mecânicas e funcionais de nanoestruturas de carbono
• Beneficiário: Eliezer Fernando de Oliveira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/08293-7 - CECC - Centro de Engenharia e Ciências Computacionais
• Beneficiário: Munir Salomao Skaf
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs