Volume 20, Issue 26 2307817
Research Article

Unveiling Liquid-Phase Exfoliation of Graphite and Boron Nitride Using Fluorescent Dyes Through Combined Experiments and Simulations

Yilin He

Yilin He

CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR 3572, University of Strasbourg, ISIS, Strasbourg, 67000 France

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Xuliang Qian

Xuliang Qian

School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798 Singapore

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Guilherme Carneiro Queiroz da Silva

Guilherme Carneiro Queiroz da Silva

Department of Engineering and Architecture, University of Trieste, Trieste, 34127 Italy

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Cristian Gabellini

Cristian Gabellini

Department of Engineering and Architecture, University of Trieste, Trieste, 34127 Italy

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Matteo Andrea Lucherelli

Matteo Andrea Lucherelli

CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR 3572, University of Strasbourg, ISIS, Strasbourg, 67000 France

Instituto de Ciencia Molecular (ICMol), Universitat de Valencia, Carrer del Catedrátic José Beltrán Martinez, 2, Paterna, Valencia, 46980 Spain

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Giacomo Biagiotti

Giacomo Biagiotti

Department of Chemistry ‘Ugo Schiff’, University of Firenze, Sesto Fiorentino, Firenze, 50019 Italy

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Barbara Richichi

Corresponding Author

Barbara Richichi

Department of Chemistry ‘Ugo Schiff’, University of Firenze, Sesto Fiorentino, Firenze, 50019 Italy

E-mail: [email protected]; [email protected]; [email protected]; [email protected]

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Cécilia Ménard-Moyon

Cécilia Ménard-Moyon

CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR 3572, University of Strasbourg, ISIS, Strasbourg, 67000 France

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Huajian Gao

Corresponding Author

Huajian Gao

School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798 Singapore

Institute of High-Performance Computing, A*STAR, Singapore, 138632 Singapore

Department of Engineering Mechanics, Tsinghua University, Beijing, 100084 China

E-mail: [email protected]; [email protected]; [email protected]; [email protected]

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Paola Posocco

Corresponding Author

Paola Posocco

Department of Engineering and Architecture, University of Trieste, Trieste, 34127 Italy

E-mail: [email protected]; [email protected]; [email protected]; [email protected]

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Alberto Bianco

Corresponding Author

Alberto Bianco

CNRS, Immunology, Immunopathology and Therapeutic Chemistry, UPR 3572, University of Strasbourg, ISIS, Strasbourg, 67000 France

E-mail: [email protected]; [email protected]; [email protected]; [email protected]

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First published: 24 January 2024
Citations: 4

Abstract

Liquid-phase exfoliation (LPE) in aqueous solutions provides a simple, scalable, and green approach to produce 2D materials. By combining atomistic simulations with exfoliation experiments, the interaction between a surfactant and a 2D layer at the molecular scale can be better understood. In this work, two different dyes, corresponding to rhodamine B base (Rbb) and to a phenylboronic acid BODIPY (PBA-BODIPY) derivative, are employed as dispersants to exfoliate graphene and hexagonal boron nitride (hBN) through sonication-assisted LPE. The exfoliated 2D sheets, mostly as few-layers, exhibit good quality and high loading of dyes. Using molecular dynamics (MD) simulations, the binding free energies are calculated and the arrangement of both dyes on the layers are predicted. It has been found that the dyes show a higher affinity toward hBN than graphene, which is consistent with the higher yields of exfoliated hBN. Furthermore, it is demonstrated that the adsorption behavior of Rbb molecules on graphene and hBN is quite different compared to PBA-BODIPY.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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