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Multiplexed analysi...
Multiplexed analysis of molecular and elemental ions using nanowire transistor sensors
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- Chen, Xi (författare)
- Uppsala universitet,Fasta tillståndets elektronik
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- Hu, Qitao (författare)
- Uppsala universitet,Fasta tillståndets elektronik
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- Chen, Si, 1982- (författare)
- Uppsala universitet,Fasta tillståndets elektronik
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visa fler...
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- Netzer, Nathan L. (författare)
- Uppsala universitet,Fasta tillståndets elektronik
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- Wang, Zhenqiang (författare)
- Univ South Dakota, Dept Chem, Churchill Haines Labs, Room 115,414 East Clark St, Vermillion, SD 57069 USA
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- Zhang, Shi-Li (författare)
- Uppsala universitet,Fasta tillståndets elektronik
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- Zhang, Zhen, 1979- (författare)
- Uppsala universitet,Fasta tillståndets elektronik
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visa färre...
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(creator_code:org_t)
- Elsevier BV, 2018
- 2018
- Engelska.
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Ingår i: Sensors and actuators. B, Chemical. - : Elsevier BV. - 0925-4005 .- 1873-3077. ; 270, s. 89-96
- Relaterad länk:
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http://www.sciencedi...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- An integrated sensor chip with silicon nanowire ion-sensitive field-effect transistors for simultaneous and selective detection of both molecular and elemental ions in a single sample solution is demonstrated. The sensing selectivity is realized by functionalizing the sensor surface with tailor-made mixed-matrix membranes (MMM) incorporated with specific ionophores for the target ions. A biomimetic container molecule, named metal-organic supercontainer (MOSC), is selected as the ionophore for detection of methylene blue (MB+), a molecular ion, while a commercially available Na-ionophore is used for Na+, an elemental ion. The sensors show a near-Nernstian response with 56.4â¯Â±â¯1.8â¯mV/dec down to a concentration limit of âŒ1â¯ÎŒM for MB+ and 57.9â¯Â±â¯0.7â¯mV/dec down to âŒ60â¯ÎŒM for Na+, both with excellent reproducibility. Extensive control experiments on the MB+ sensor lead to identification of the critical role of the MOSC molecules in achieving a stable and reproducible potentiometric response. Moreover, the MB+-specific sensor shows remarkable selectivity against common interfering elemental ions in physiological samples, e.g., H+, Na+, and K+. Although the Na+-specific sensor is currently characterized by insufficient immunity to the interference by MB+, the root cause is identified and remedies generally applicable for hydrophobic molecular ions are discussed. River water experiments are also conducted to prove the efficacy of our sensors.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Elektroteknik och elektronik -- Annan elektroteknik och elektronik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Electrical Engineering, Electronic Engineering, Information Engineering -- Other Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)
Nyckelord
- Elemental ion
- ISFET
- Metal-organic supercontainer
- Molecular ion
- Multiplex detection
- Silicon nanowire FET
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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