Highly sensitive Escherichia coli shear horizontal surface acoustic wave biosensor with silicon dioxide nanostructures.
Identifieur interne : 000C84 ( PubMed/Checkpoint ); précédent : 000C83; suivant : 000C85Highly sensitive Escherichia coli shear horizontal surface acoustic wave biosensor with silicon dioxide nanostructures.
Auteurs : S T Ten [Malaisie] ; U. Hashim [Malaisie] ; S C B. Gopinath [Malaisie] ; W W Liu [Malaisie] ; K L Foo [Malaisie] ; S T Sam [Malaisie] ; S F A. Rahman [Malaisie] ; C H Voon [Malaisie] ; A N Nordin [Malaisie]Source :
- Biosensors & bioelectronics [ 1873-4235 ] ; 2017.
Descripteurs français
- KwdFr :
- ADN bactérien (), ADN bactérien (isolement et purification), ADN simple brin (), ADN simple brin (isolement et purification), Escherichia coli O157 (isolement et purification), Escherichia coli O157 (pathogénicité), Humains, Microbiologie alimentaire, Nanostructures (), Or (), Silice (), Son (acoustique), Techniques de biocapteur ().
- MESH :
- isolement et purification : ADN bactérien, ADN simple brin, Escherichia coli O157.
- pathogénicité : Escherichia coli O157.
- ADN bactérien, ADN simple brin, Humains, Microbiologie alimentaire, Nanostructures, Or, Silice, Son (acoustique), Techniques de biocapteur.
English descriptors
- KwdEn :
- Biosensing Techniques (methods), DNA, Bacterial (chemistry), DNA, Bacterial (isolation & purification), DNA, Single-Stranded (chemistry), DNA, Single-Stranded (isolation & purification), Escherichia coli O157 (isolation & purification), Escherichia coli O157 (pathogenicity), Food Microbiology, Gold (chemistry), Humans, Nanostructures (chemistry), Silicon Dioxide (chemistry), Sound.
- MESH :
- chemical , chemistry : DNA, Bacterial, DNA, Single-Stranded, Gold, Silicon Dioxide.
- chemical , isolation & purification : DNA, Bacterial, DNA, Single-Stranded.
- chemistry : Nanostructures.
- isolation & purification : Escherichia coli O157.
- methods : Biosensing Techniques.
- pathogenicity : Escherichia coli O157.
- Food Microbiology, Humans, Sound.
Abstract
Surface acoustic wave mediated transductions have been widely used in the sensors and actuators applications. In this study, a shear horizontal surface acoustic wave (SHSAW) was used for the detection of food pathogenic Escherichia coli O157:H7 (E.coli O157:H7), a dangerous strain among 225 E. coli unique serotypes. A few cells of this bacterium are able to cause young children to be most vulnerable to serious complications. Presence of higher than 1cfu E.coli O157:H7 in 25g of food has been considered as a dangerous level. The SHSAW biosensor was fabricated on 64° YX LiNbO3 substrate. Its sensitivity was enhanced by depositing 130.5nm thin layer of SiO2 nanostructures with particle size lesser than 70nm. The nanostructures act both as a waveguide as well as a physical surface modification of the sensor prior to biomolecular immobilization. A specific DNA sequence from E. coli O157:H7 having 22 mers as an amine-terminated probe ssDNA was immobilized on the thin film sensing area through chemical functionalization [(CHO-(CH2)3-CHO) and APTES; NH2-(CH2)3-Si(OC2H5)3]. The high-performance of sensor was shown with the specific oligonucleotide target and attained the sensitivity of 0.6439nM/0.1kHz and detection limit was down to 1.8femto-molar (1.8×10-15M). Further evidence was provided by specificity analysis using single mismatched and complementary oligonucleotide sequences.
DOI: 10.1016/j.bios.2016.09.035
PubMed: 27660016
Affiliations:
Links toward previous steps (curation, corpus...)
Links to Exploration step
pubmed:27660016Le document en format XML
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<term>DNA, Single-Stranded (chemistry)</term>
<term>DNA, Single-Stranded (isolation & purification)</term>
<term>Escherichia coli O157 (isolation & purification)</term>
<term>Escherichia coli O157 (pathogenicity)</term>
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<term>Escherichia coli O157 (isolement et purification)</term>
<term>Escherichia coli O157 (pathogénicité)</term>
<term>Humains</term>
<term>Microbiologie alimentaire</term>
<term>Nanostructures ()</term>
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<term>Techniques de biocapteur ()</term>
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<term>Silicon Dioxide</term>
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<term>DNA, Single-Stranded</term>
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<front><div type="abstract" xml:lang="en">Surface acoustic wave mediated transductions have been widely used in the sensors and actuators applications. In this study, a shear horizontal surface acoustic wave (SHSAW) was used for the detection of food pathogenic Escherichia coli O157:H7 (E.coli O157:H7), a dangerous strain among 225 E. coli unique serotypes. A few cells of this bacterium are able to cause young children to be most vulnerable to serious complications. Presence of higher than 1cfu E.coli O157:H7 in 25g of food has been considered as a dangerous level. The SHSAW biosensor was fabricated on 64° YX LiNbO<sub>3</sub>
substrate. Its sensitivity was enhanced by depositing 130.5nm thin layer of SiO<sub>2</sub>
nanostructures with particle size lesser than 70nm. The nanostructures act both as a waveguide as well as a physical surface modification of the sensor prior to biomolecular immobilization. A specific DNA sequence from E. coli O157:H7 having 22 mers as an amine-terminated probe ssDNA was immobilized on the thin film sensing area through chemical functionalization [(CHO-(CH<sub>2</sub>
)<sub>3</sub>
-CHO) and APTES; NH<sub>2</sub>
-(CH<sub>2</sub>
)<sub>3</sub>
-Si(OC<sub>2</sub>
H<sub>5</sub>
)<sub>3</sub>
]. The high-performance of sensor was shown with the specific oligonucleotide target and attained the sensitivity of 0.6439nM/0.1kHz and detection limit was down to 1.8femto-molar (1.8×10<sup>-15</sup>
M). Further evidence was provided by specificity analysis using single mismatched and complementary oligonucleotide sequences.</div>
</front>
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<Title>Biosensors & bioelectronics</Title>
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<ArticleTitle>Highly sensitive Escherichia coli shear horizontal surface acoustic wave biosensor with silicon dioxide nanostructures.</ArticleTitle>
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<Abstract><AbstractText>Surface acoustic wave mediated transductions have been widely used in the sensors and actuators applications. In this study, a shear horizontal surface acoustic wave (SHSAW) was used for the detection of food pathogenic Escherichia coli O157:H7 (E.coli O157:H7), a dangerous strain among 225 E. coli unique serotypes. A few cells of this bacterium are able to cause young children to be most vulnerable to serious complications. Presence of higher than 1cfu E.coli O157:H7 in 25g of food has been considered as a dangerous level. The SHSAW biosensor was fabricated on 64° YX LiNbO<sub>3</sub>
substrate. Its sensitivity was enhanced by depositing 130.5nm thin layer of SiO<sub>2</sub>
nanostructures with particle size lesser than 70nm. The nanostructures act both as a waveguide as well as a physical surface modification of the sensor prior to biomolecular immobilization. A specific DNA sequence from E. coli O157:H7 having 22 mers as an amine-terminated probe ssDNA was immobilized on the thin film sensing area through chemical functionalization [(CHO-(CH<sub>2</sub>
)<sub>3</sub>
-CHO) and APTES; NH<sub>2</sub>
-(CH<sub>2</sub>
)<sub>3</sub>
-Si(OC<sub>2</sub>
H<sub>5</sub>
)<sub>3</sub>
]. The high-performance of sensor was shown with the specific oligonucleotide target and attained the sensitivity of 0.6439nM/0.1kHz and detection limit was down to 1.8femto-molar (1.8×10<sup>-15</sup>
M). Further evidence was provided by specificity analysis using single mismatched and complementary oligonucleotide sequences.</AbstractText>
<CopyrightInformation>Copyright © 2016 Elsevier B.V. All rights reserved.</CopyrightInformation>
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<Keyword MajorTopicYN="N">Hybridization</Keyword>
<Keyword MajorTopicYN="N">Shear horizontal surface acoustic wave (SHSAW)</Keyword>
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