Sensing the quantized reactivity of graphene.

Lopes, Laís C; Bueno, Paulo R

Lopes, Laís C; Bueno, Paulo R.

Afiliação

Lopes LC; Institute of Chemistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil.
Bueno PR; Institute of Chemistry, São Paulo State University (UNESP), Araraquara, São Paulo, Brazil. Electronic address: paulo-roberto.bueno@unesp.br.

Anal Chim Acta ; 1177: 338735, 2021 Sep 08.

Article em En | MEDLINE | ID: mdl-34482901

RESUMO

We demonstrated that the variations measured in the quantum capacitance of single-layer graphene, envisioned here as a conceptual molecular model, depend on the chemical reactivity of the molecule and can be used as an analytical and sensing tool for environmental conditions. The variations are quantized as a function of the environmental changes and can be correlated with chemical reactivity indexes such as chemical hardness and softness. This not only constitutes a proof-of-principle that the chemical reactivity of graphene, as a single molecule, can be determined in situ by measuring the quantum capacitance, but also that these measurements can be used as an analytical tool.

Assuntos

Grafite; Capacitância Elétrica; Modelos Moleculares; Nanotecnologia

Palavras-chave

Chemical hardness; Conceptual density functional theory; Graphene; Impedance spectroscopy; Quantum capacitance; Single-molecule capacitance

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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Grafite Idioma: En Revista: Anal Chim Acta Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda

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