Liquid phase SPR imaging experiments for biosensors applications.
Biosens Bioelectron
; 20(6): 1140-8, 2004 Dec 15.
Article
en En
| MEDLINE
| ID: mdl-15556360
ABSTRACT
Surface plasmon resonance (SPR) has recently gained attention as a label-free method for the detection of biological molecules binding onto functionalised surfaces. It is one of the most sensitive detection method for monitor variations in the thickness and refractive index in ultra-thin films. Here, the adsorption processes of oligonucleotides onto gold substrates have been investigated in aqueous buffer solution using SPR imaging measurements. The hybridization of a thiol-modified, single stranded oligonucleotide anchored to a gold surface via thiol group, with its complementary sequence has been observed and characterised monitoring the hybridization process by SPR equipment. In situ investigation of smallest changes in SPR imaging measurements dynamically performed in liquid phase in the presence of DNA complementary probes was performed. Infrared spectroscopy and scanning electron microscopy characterisation of the functionalised gold surfaces of the biosensor were compared with the images obtained by SPR experimental apparatus.
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Base de datos:
MEDLINE
Asunto principal:
ADN
/
Técnicas Biosensibles
/
Sondas de ADN
/
Hibridación in Situ
/
Resonancia por Plasmón de Superficie
/
Análisis de Secuencia por Matrices de Oligonucleótidos
Tipo de estudio:
Evaluation_studies
Idioma:
En
Revista:
Biosens Bioelectron
Asunto de la revista:
BIOTECNOLOGIA
Año:
2004
Tipo del documento:
Article
País de afiliación:
Italia