ELECTROOXIDATION OF DNA AT GLASSY CARBON ELECTRODES MODIFIED WITH MULTI-WALLED CARBON NANOTUBES WITH DIFFERENT OXIDATION DEGREE

For the first time, the study of the effect of length and degree of oxidation of multi-walled carbon nanotubes (CNTs) on the electroanalytical DNA sensing properties of modified glassy carbon electrodes (GCEs) is reported. GCE/CNT electrodes were prepared using chitosan (CHI) as a dispersing agent....

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	CAÑETE-ROSALES,PAULINA, ÁLVAREZ-LUEJE,ALEJANDRO, BOLLO,SOLEDAD
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2014
Materias:	Carbon nanotubes oxidation Chitosan glassy carbon electrode dsDNA
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072014000200021
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:scielo:S0717-97072014000200021
record_format	dspace
spelling	oai:scielo:S0717-970720140002000212014-11-05ELECTROOXIDATION OF DNA AT GLASSY CARBON ELECTRODES MODIFIED WITH MULTI-WALLED CARBON NANOTUBES WITH DIFFERENT OXIDATION DEGREECAÑETE-ROSALES,PAULINAÁLVAREZ-LUEJE,ALEJANDROBOLLO,SOLEDAD Carbon nanotubes oxidation Chitosan glassy carbon electrode dsDNA For the first time, the study of the effect of length and degree of oxidation of multi-walled carbon nanotubes (CNTs) on the electroanalytical DNA sensing properties of modified glassy carbon electrodes (GCEs) is reported. GCE/CNT electrodes were prepared using chitosan (CHI) as a dispersing agent. Short (S-NCs) and long (L-NCs) carbon nanotubes, as well as unoxidized and 3 or 6 hour oxidized samples were used. Cyclic voltammetry indicated that S-NCs exhibited larger capacitance values than L-NCs, and that these values increased when the CNTs were oxidized. Using Scanning Electrochemical Microscopy (SECM), an increase in the surface homogeneity was determined when oxidized CNTs were used as electrode modifiers. dsDNA electrooxidation showed the highest response using GCEs/CHI-L-NCs, and a clear decrease in the current intensity was observed when the oxidation time was increased. This result correlates with the higher BET surface area of L-NCs. In conclusion, the electrochemical performance of GCE/CNT electrodes against DNA increase when the length of CNTs is higher and decrease at higher oxidation state.info:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.59 n.2 20142014-07-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072014000200021en10.4067/S0717-97072014000200021
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Carbon nanotubes oxidation Chitosan glassy carbon electrode dsDNA
spellingShingle	Carbon nanotubes oxidation Chitosan glassy carbon electrode dsDNA CAÑETE-ROSALES,PAULINA ÁLVAREZ-LUEJE,ALEJANDRO BOLLO,SOLEDAD ELECTROOXIDATION OF DNA AT GLASSY CARBON ELECTRODES MODIFIED WITH MULTI-WALLED CARBON NANOTUBES WITH DIFFERENT OXIDATION DEGREE
description	For the first time, the study of the effect of length and degree of oxidation of multi-walled carbon nanotubes (CNTs) on the electroanalytical DNA sensing properties of modified glassy carbon electrodes (GCEs) is reported. GCE/CNT electrodes were prepared using chitosan (CHI) as a dispersing agent. Short (S-NCs) and long (L-NCs) carbon nanotubes, as well as unoxidized and 3 or 6 hour oxidized samples were used. Cyclic voltammetry indicated that S-NCs exhibited larger capacitance values than L-NCs, and that these values increased when the CNTs were oxidized. Using Scanning Electrochemical Microscopy (SECM), an increase in the surface homogeneity was determined when oxidized CNTs were used as electrode modifiers. dsDNA electrooxidation showed the highest response using GCEs/CHI-L-NCs, and a clear decrease in the current intensity was observed when the oxidation time was increased. This result correlates with the higher BET surface area of L-NCs. In conclusion, the electrochemical performance of GCE/CNT electrodes against DNA increase when the length of CNTs is higher and decrease at higher oxidation state.
author	CAÑETE-ROSALES,PAULINA ÁLVAREZ-LUEJE,ALEJANDRO BOLLO,SOLEDAD
author_facet	CAÑETE-ROSALES,PAULINA ÁLVAREZ-LUEJE,ALEJANDRO BOLLO,SOLEDAD
author_sort	CAÑETE-ROSALES,PAULINA
title	ELECTROOXIDATION OF DNA AT GLASSY CARBON ELECTRODES MODIFIED WITH MULTI-WALLED CARBON NANOTUBES WITH DIFFERENT OXIDATION DEGREE
title_short	ELECTROOXIDATION OF DNA AT GLASSY CARBON ELECTRODES MODIFIED WITH MULTI-WALLED CARBON NANOTUBES WITH DIFFERENT OXIDATION DEGREE
title_full	ELECTROOXIDATION OF DNA AT GLASSY CARBON ELECTRODES MODIFIED WITH MULTI-WALLED CARBON NANOTUBES WITH DIFFERENT OXIDATION DEGREE
title_fullStr	ELECTROOXIDATION OF DNA AT GLASSY CARBON ELECTRODES MODIFIED WITH MULTI-WALLED CARBON NANOTUBES WITH DIFFERENT OXIDATION DEGREE
title_full_unstemmed	ELECTROOXIDATION OF DNA AT GLASSY CARBON ELECTRODES MODIFIED WITH MULTI-WALLED CARBON NANOTUBES WITH DIFFERENT OXIDATION DEGREE
title_sort	electrooxidation of dna at glassy carbon electrodes modified with multi-walled carbon nanotubes with different oxidation degree
publisher	Sociedad Chilena de Química
publishDate	2014
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072014000200021
work_keys_str_mv	AT caneterosalespaulina electrooxidationofdnaatglassycarbonelectrodesmodifiedwithmultiwalledcarbonnanotubeswithdifferentoxidationdegree AT alvarezluejealejandro electrooxidationofdnaatglassycarbonelectrodesmodifiedwithmultiwalledcarbonnanotubeswithdifferentoxidationdegree AT bollosoledad electrooxidationofdnaatglassycarbonelectrodesmodifiedwithmultiwalledcarbonnanotubeswithdifferentoxidationdegree
_version_	1718445518789541888

ELECTROOXIDATION OF DNA AT GLASSY CARBON ELECTRODES MODIFIED WITH MULTI-WALLED CARBON NANOTUBES WITH DIFFERENT OXIDATION DEGREE

Ejemplares similares