Effects of lateral size, thickness, and stabilizer concentration on the cytotoxicity of defect-free graphene nanosheets

In this work, we apply liquid cascade centrifugation to highly concentrated graphene dispersions produced by liquid-phase exfoliation in water with an insoluble bis-pyrene stabilizer to obtain fractions containing nanosheets with different lateral size distributions. The concentration, stability, si...

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Detalles Bibliográficos
Autores: Hu, Chen-Xia, Read, Oliver|||0000-0001-9771-6096, Shin, Yuyoung|||0000-0003-4359-5406, Chen, Yingxian, Wang, Jingjing, Boyes, Matthew, Zeng, Niting|||0000-0002-7843-5026, Panigrahi, Adyasha, Kostarelos, Kostas|||0000-0002-2224-6672, Larrosa, Igor|||0000-0002-5391-7424, Vranic, Sandra|||0000-0002-6653-7156, Casiraghi, Cinzia|||0000-0001-7185-0377
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universitat Autònoma de Barcelona
Repositorio:Dipòsit Digital de Documents de la UAB
Idioma:inglés
OAI Identifier:oai:ddd.uab.cat:273665
Acceso en línea:https://ddd.uab.cat/record/273665
https://dx.doi.org/urn:doi:10.1021/acsanm.2c02403
Access Level:acceso abierto
Palabra clave:Graphene
Liquid-phase exfoliation
Pyrene
Biocompatibility
Atomic force microscopy
Size-thickness characterization
Descripción
Sumario:In this work, we apply liquid cascade centrifugation to highly concentrated graphene dispersions produced by liquid-phase exfoliation in water with an insoluble bis-pyrene stabilizer to obtain fractions containing nanosheets with different lateral size distributions. The concentration, stability, size, thickness, and the cytotoxicity profile are studied as a function of the initial stabilizer concentration for each fraction. Our results show that there is a critical initial amount of stabilizer (0.4 mg/mL) above which the dispersions show reduced concentration, stability, and biocompatibility, no matter the lateral size of the flakes.

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