NDLI: Enhancement of the colorimetric response of enzymatic reactions by thermally evaporated plasmonic thin films: application to glial fibrillary acidic protein

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Enhancement of the colorimetric response of enzymatic reactions by thermally evaporated plasmonic thin films: application to glial fibrillary acidic protein

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Enhancement of the colorimetric response of enzymatic reactions by thermally evaporated plasmonic thin films: application to glial fibrillary acidic protein

Content Provider	Royal Society of Chemistry (RSC)
Author	Aslan, Kadir Kabir, Tabassum S. Mohammed, Muzaffer Abel, Biebele Odukoya, Babatunde
Copyright Year	2015
Abstract	We report the enhancement of the colorimetric response of horseradish peroxidase (HRP) and alkaline phosphatase (AP) in bioassays by thermally evaporated silver, gold, copper and nickel thin films. In this regard, a model bioassay based on biotin–avidin interactions was employed. Biotin groups and enzymes were introduced to all surfaces using a biotinylated linker molecule and avidin, respectively. The colorimetric response of HRP in the model bioassay carried out on plasmonic thin films were up to 4.4-fold larger as compared to control samples (i.e., no plasmonic thin films), where the largest enhancement of the colorimetric response was observed on silver thin films. The colorimetric response of AP on plasmonic thin films was found to be similar to those observed on control samples, which was attributed to the loss of enzymes from the surface during the bioassay steps. The extent of enzymes immobilized on to plasmonic thin films was found to affect the colorimetric response of the model bioassay. These findings allowed us to demonstrate the use of silver thin films for the detection of glial fibrillary acidic protein (GFAP), where the colorimetric response of the standard bioassays for GFAP was enhanced up to 67% as compared to bioassays on glass slides.
Starting Page	1175
Ending Page	1185
Page Count	11
File Format	HTM / HTML PDF
ISSN	17599660
Volume Number	7
Issue Number	3
Journal	Analytical Methods
DOI	10.1039/c4ay02505a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Alkaline phosphatase Bioassay Glial fibrillary acidic protein HRP Horseradish peroxidase Nickel Biotin Copper Avidin AP GFAP
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry Engineering Chemical Engineering

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