Signal amplification by strand displacement in a carbon dot based fluorometric assay for ATP.
Mikrochim Acta
; 185(8): 392, 2018 07 28.
Article
en En
| MEDLINE
| ID: mdl-30056590
ABSTRACT
A fluorometric ATP assay is described that makes use of carbon dots and graphene oxide along with toehold-mediated strand displacement reaction. In the absence of target, the fluorescence of carbon dots (with excitation/emission maxima at 360/447 nm) is strong and in the "on" state, because the signal probe hybridizes with the aptamer strand and cannot combine with graphene oxide. In the presence of ATP, it will bind to the aptamer and induce a strand displacement reaction. Consequently, the signal probe is released, the sensing strategy will change into the "off" state with the addition of graphene oxide. This aptasensor exhibits selective and sensitive response to ATP and has a 3.3 nM detection limit. Graphical abstract Schematic of signal amplification by strand displacement in a carbon dot based fluorometric assay for ATP. This strategy exhibits high sensitivity and selectivity with a detection limit as low as 3.3 nM.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Carbono
/
Técnicas Biosensibles
/
Adenosina Trifosfato
/
Puntos Cuánticos
/
Fluorometría
Límite:
Humans
Idioma:
En
Revista:
Mikrochim Acta
Año:
2018
Tipo del documento:
Article
País de afiliación:
China