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Titanium Dioxide Nanoparticle-Based Interdigitated Electrodes: A Novel Current to Voltage DNA Biosensor Recognizes E. coli O157:H7

Nanoparticle-mediated bio-sensing promoted the development of novel sensors in the front of medical diagnosis. In the present study, we have generated and examined the potential of titanium dioxide (TiO2) crystalline nanoparticles with aluminium interdigitated electrode biosensor to specifically...

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Main Authors: Sh., Nadzirah, N., Azizah, Uda, Hashim, Subash C. B., Gopinath, Mohd, Kashif
Format: E-Article
Language:English
Published: Plos One Publishing 2015
Subjects:
Q Science (General)
Online Access:http://ir.unimas.my/id/eprint/10566/1/NO%20139Titanium%20dioxide%20nanoparticle-based%20interdigitated%20electrodes%20%28abstract%29.pdf
http://ir.unimas.my/id/eprint/10566/
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0139766
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spelling my.unimas.ir.105662016-10-21T07:06:55Z http://ir.unimas.my/id/eprint/10566/ Titanium Dioxide Nanoparticle-Based Interdigitated Electrodes: A Novel Current to Voltage DNA Biosensor Recognizes E. coli O157:H7 Sh., Nadzirah N., Azizah Uda, Hashim Subash C. B., Gopinath Mohd, Kashif Q Science (General) Nanoparticle-mediated bio-sensing promoted the development of novel sensors in the front of medical diagnosis. In the present study, we have generated and examined the potential of titanium dioxide (TiO2) crystalline nanoparticles with aluminium interdigitated electrode biosensor to specifically detect single-stranded E.coli O157:H7 DNA. The performance of this novel DNA biosensor was measured the electrical current response using a picoammeter. The sensor surface was chemically functionalized with (3-aminopropyl) triethoxysilane (APTES) to provide contact between the organic and inorganic surfaces of a singlestranded DNA probe and TiO2 nanoparticles while maintaining the sensing system’s physical characteristics. The complement of the target DNA of E. coli O157:H7 to the carboxylate- probe DNA could be translated into electrical signals and confirmed by the increased conductivity in the current-to-voltage curves. The specificity experiments indicate that the biosensor can discriminate between the complementary sequences from the base-mismatched and the non-complementary sequences. After duplex formation, the complementary target sequence can be quantified over a wide range with a detection limit of 1.0 x 10- 13M. With target DNA from the lysed E. coli O157:H7, we could attain similar sensitivity. Stability of DNA immobilized surface was calculated with the relative standard deviation (4.6%), displayed the retaining with 99% of its original response current until 6 months. This high-performance interdigitated DNA biosensor with high sensitivity, stability and non-fouling on a novel sensing platform is suitable for a wide range of biomolecular interactive analyses. Plos One Publishing 2015 E-Article PeerReviewed text en http://ir.unimas.my/id/eprint/10566/1/NO%20139Titanium%20dioxide%20nanoparticle-based%20interdigitated%20electrodes%20%28abstract%29.pdf Sh., Nadzirah and N., Azizah and Uda, Hashim and Subash C. B., Gopinath and Mohd, Kashif (2015) Titanium Dioxide Nanoparticle-Based Interdigitated Electrodes: A Novel Current to Voltage DNA Biosensor Recognizes E. coli O157:H7. PLoS ONE, 10 (10). ISSN 1932-6203 http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0139766 DOI:10.1371/journal.pone.0139766
institution Universiti Malaysia Sarawak
building Centre for Academic Information Services (CAIS)
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Malaysia Sarawak
content_source UNIMAS Institutional Repository
url_provider http://ir.unimas.my/
language English
topic Q Science (General)
spellingShingle Q Science (General)
Sh., Nadzirah
N., Azizah
Uda, Hashim
Subash C. B., Gopinath
Mohd, Kashif
Titanium Dioxide Nanoparticle-Based Interdigitated Electrodes: A Novel Current to Voltage DNA Biosensor Recognizes E. coli O157:H7
description Nanoparticle-mediated bio-sensing promoted the development of novel sensors in the front of medical diagnosis. In the present study, we have generated and examined the potential of titanium dioxide (TiO2) crystalline nanoparticles with aluminium interdigitated electrode biosensor to specifically detect single-stranded E.coli O157:H7 DNA. The performance of this novel DNA biosensor was measured the electrical current response using a picoammeter. The sensor surface was chemically functionalized with (3-aminopropyl) triethoxysilane (APTES) to provide contact between the organic and inorganic surfaces of a singlestranded DNA probe and TiO2 nanoparticles while maintaining the sensing system’s physical characteristics. The complement of the target DNA of E. coli O157:H7 to the carboxylate- probe DNA could be translated into electrical signals and confirmed by the increased conductivity in the current-to-voltage curves. The specificity experiments indicate that the biosensor can discriminate between the complementary sequences from the base-mismatched and the non-complementary sequences. After duplex formation, the complementary target sequence can be quantified over a wide range with a detection limit of 1.0 x 10- 13M. With target DNA from the lysed E. coli O157:H7, we could attain similar sensitivity. Stability of DNA immobilized surface was calculated with the relative standard deviation (4.6%), displayed the retaining with 99% of its original response current until 6 months. This high-performance interdigitated DNA biosensor with high sensitivity, stability and non-fouling on a novel sensing platform is suitable for a wide range of biomolecular interactive analyses.
format E-Article
author Sh., Nadzirah
N., Azizah
Uda, Hashim
Subash C. B., Gopinath
Mohd, Kashif
author_facet Sh., Nadzirah
N., Azizah
Uda, Hashim
Subash C. B., Gopinath
Mohd, Kashif
author_sort Sh., Nadzirah
title Titanium Dioxide Nanoparticle-Based Interdigitated Electrodes: A Novel Current to Voltage DNA Biosensor Recognizes E. coli O157:H7
title_short Titanium Dioxide Nanoparticle-Based Interdigitated Electrodes: A Novel Current to Voltage DNA Biosensor Recognizes E. coli O157:H7
title_full Titanium Dioxide Nanoparticle-Based Interdigitated Electrodes: A Novel Current to Voltage DNA Biosensor Recognizes E. coli O157:H7
title_fullStr Titanium Dioxide Nanoparticle-Based Interdigitated Electrodes: A Novel Current to Voltage DNA Biosensor Recognizes E. coli O157:H7
title_full_unstemmed Titanium Dioxide Nanoparticle-Based Interdigitated Electrodes: A Novel Current to Voltage DNA Biosensor Recognizes E. coli O157:H7
title_sort titanium dioxide nanoparticle-based interdigitated electrodes: a novel current to voltage dna biosensor recognizes e. coli o157:h7
publisher Plos One Publishing
publishDate 2015
url http://ir.unimas.my/id/eprint/10566/1/NO%20139Titanium%20dioxide%20nanoparticle-based%20interdigitated%20electrodes%20%28abstract%29.pdf
http://ir.unimas.my/id/eprint/10566/
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0139766
_version_ 1644510996855783424
score 13.211869

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