Facile reflux synthesis of polyethyleneimine-capped fluorescent carbon dots for sequential bioassays toward Cu2+ /H2 S and its application for a logic system.
Biotechnol Appl Biochem
; 66(3): 426-433, 2019 May.
Article
em En
| MEDLINE
| ID: mdl-30806989
ABSTRACT
In this work, we present a novel facile strategy for green synthesis of polyethyleneimine (PEI)-capped carbon dots (PEI-CDs), in which citric acid and PEI were chosen as reactants and highly fluorescent PEI-CDs could be readily obtained via a simple one-pot refluxing under 120 °C within 2 H. Fluorescence studies indicate that the as-prepared PEI-CDs exhibit strong fluorescence emission at 446 nm with excitation at 365 nm. Upon the sequential addition of Cu2+ and H2 S, PEI-CDs result in an interesting "ON-OFF-ON" three-state emission responses, promising a bifunctional sensory platform. Moreover, the Cu2+ /H2 S-facilated reversible fluorescence changes of PEI-CDs have demonstrated the design of an INHIBIT logic system based on Boolean logic.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Polietilenoimina
/
Carbono
/
Cobre
/
Pontos Quânticos
/
Corantes Fluorescentes
/
Sulfeto de Hidrogênio
/
Lógica
Idioma:
En
Revista:
Biotechnol Appl Biochem
Assunto da revista:
BIOQUIMICA
/
BIOTECNOLOGIA
Ano de publicação:
2019
Tipo de documento:
Article